chore: bump version

chore: delete .gz files
chore: html files moved to src_data dir; compression files
2025-12-11 18:54:28 +05:00 · 2024-04-12 20:47:02 +03:00 · 2024-04-12 20:39:56 +03:00 · 2024-04-12 04:13:44 +03:00 · 2024-04-12 04:10:55 +03:00 · 2024-04-12 04:08:28 +03:00
35 changed files with 2944 additions and 1222 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 .pio
 .vscode
 build/*.bin
+data/**/*.gz
 secrets.ini
 !.gitkeep
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
   
   ![logo](/assets/logo.svg)
   <br>
-   [![GitHub version](https://img.shields.io/github/release/Laxilef/OTGateway.svg)](https://github.com/Laxilef/OTGateway/releases)
+   [![GitHub version](https://img.shields.io/github/release/Laxilef/OTGateway.svg?include_prereleases)](https://github.com/Laxilef/OTGateway/releases)
   [![GitHub download](https://img.shields.io/github/downloads/Laxilef/OTGateway/total.svg)](https://github.com/Laxilef/OTGateway/releases/latest)
   [![License](https://img.shields.io/github/license/Laxilef/OTGateway.svg)](LICENSE.txt)
   [![Telegram](https://img.shields.io/badge/Telegram-Channel-33A8E3)](https://t.me/otgateway)
--- a/data/.gitkeep
+++ b/data/.gitkeep
--- a/data/index.html
+++ b/data/index.html
@@ -1,230 +0,0 @@
-<!doctype html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <title>OpenTherm Gateway</title>
-    <link rel="stylesheet" href="/static/pico.min.css">
-    <link rel="stylesheet" href="/static/app.css"/>
-  </head>
-
-  <body>
-    <header class="container">
-      <nav>
-        <ul>
-          <li><a href="/"><div class="logo">OpenTherm Gateway</div></a></li>
-        </ul>
-        <ul>
-          <li><a href="https://github.com/Laxilef/OTGateway/wiki" role="button" class="secondary" target="_blank">Help</a></li>
-        </ul>
-      </nav>
-    </header>
-
-    <main class="container">
-      <article>
-        <div>
-          <hgroup>
-            <h2>Network</h2>
-            <p></p>
-          </hgroup>
-
-          <div class="main-busy" aria-busy="true"></div>
-          <table class="main-table hidden">
-            <tbody>
-              <tr>
-                <th scope="row">Hostname:</th>
-                <td><b class="network-hostname"></b></td>
-              </tr>
-              <tr>
-                <th scope="row">MAC:</th>
-                <td><b class="network-mac"></b></td>
-              </tr>
-              <tr>
-                <th scope="row">Connected:</th>
-                <td><input type="radio" class="network-connected" aria-invalid="false" checked disabled /></td>
-              </tr>
-              <tr>
-                <th scope="row">SSID:</th>
-                <td><b class="network-ssid"></b></td>
-              </tr>
-              <tr>
-                <th scope="row">Signal:</th>
-                <td><b class="network-signal"></b> %</td>
-              </tr>
-              <tr>
-                <th scope="row">IP:</th>
-                <td><b class="network-ip"></b></td>
-              </tr>
-              <tr>
-                <th scope="row">Subnet:</th>
-                <td><b class="network-subnet"></b></td>
-              </tr>
-              <tr>
-                <th scope="row">Gateway:</th>
-                <td><b class="network-gateway"></b></td>
-              </tr>
-              <tr>
-                <th scope="row">DNS:</th>
-                <td><b class="network-dns"></b></td>
-              </tr>
-            </tbody>
-          </table>
-          <div class="grid">
-            <a href="/network.html" role="button">Network settings</a>
-          </div>
-        </div>
-      </article>
-
-      <article>
-        <div>
-          <hgroup>
-            <h2>System</h2>
-            <p></p>
-          </hgroup>
-
-          <div class="system-busy" aria-busy="true"></div>
-          <table class="system-table hidden">
-            <tbody>
-              <tr>
-                <th scope="row">Version:</th>
-                <td><b class="version"></b></td>
-              </tr>
-              <tr>
-                <th scope="row">Build date:</th>
-                <td><b class="build-date"></b></td>
-              </tr>
-              <tr>
-                <th scope="row">Uptime:</th>
-                <td><b class="uptime-days"></b> days, <b class="uptime-hours"></b> hours, <b class="uptime-min"></b> min., <b class="uptime-sec"></b> sec.</td>
-              </tr>
-              <tr>
-                <th scope="row">Free memory:</th>
-                <td><b class="free-heap"></b> of <b class="total-heap"></b> bytes (min: <b class="min-free-heap"></b> bytes)<br>max free block: <b class="max-free-block-heap"></b> bytes (min: <b class="min-max-free-block-heap"></b> bytes)</td>
-              </tr>
-              <tr>
-                <th scope="row">Last reset reason:</th>
-                <td><b class="reset-reason"></b></td>
-              </tr>
-            </tbody>
-          </table>
-
-          <div class="grid">
-            <a href="/settings.html" role="button">Settings</a>
-            <a href="/upgrade.html" role="button">Upgrade</a>
-            <a href="/restart.html" role="button" class="secondary restart">Restart</a>
-          </div>
-        </div>
-      </article>
-
-      <article>
-        <div>
-          <hgroup>
-            <h2>States and sensors</h2>
-            <p>More information and settings can be found in your home assistant after setting up network and MQTT</p>
-          </hgroup>
-
-          <div class="ot-busy" aria-busy="true"></div>
-          <table class="ot-table hidden">
-            <tbody>
-              <tr>
-                <th scope="row">OpenTherm connected:</th>
-                <td><input type="radio" class="ot-connected" aria-invalid="false" checked disabled /></td>
-              </tr>
-              <tr>
-                <th scope="row">MQTT connected:</th>
-                <td><input type="radio" class="mqtt-connected" aria-invalid="false" checked disabled /></td>
-              </tr>
-              <tr>
-                <th scope="row">Emergency:</th>
-                <td><input type="radio" class="ot-emergency" aria-invalid="false" checked disabled /></td>
-              </tr>
-              <tr>
-                <th scope="row">Heating:</th>
-                <td><input type="radio" class="ot-heating" aria-invalid="false" checked disabled /></td>
-              </tr>
-              <tr>
-                <th scope="row">DHW:</th>
-                <td><input type="radio" class="ot-dhw" aria-invalid="false" checked disabled /></td>
-              </tr>
-              <tr>
-                <th scope="row">Flame:</th>
-                <td><input type="radio" class="ot-flame" aria-invalid="false" checked disabled /></td>
-              </tr>
-              <tr>
-                <th scope="row">Fault:</th>
-                <td><input type="radio" class="ot-fault" aria-invalid="false" checked disabled /></td>
-              </tr>
-              <tr>
-                <th scope="row">Diagnostic:</th>
-                <td><input type="radio" class="ot-diagnostic" aria-invalid="false" checked disabled /></td>
-              </tr>
-              <tr>
-                <th scope="row">External pump:</th>
-                <td><input type="radio" class="ot-external-pump" aria-invalid="false" checked disabled /></td>
-              </tr>
-              <tr>
-                <th scope="row">Modulation:</th>
-                <td><b class="ot-modulation"></b> %</td>
-              </tr>
-              <tr>
-                <th scope="row">Pressure:</th>
-                <td><b class="ot-pressure"></b> bar</td>
-              </tr>
-              <tr>
-                <th scope="row">DHW flow rate:</th>
-                <td><b class="ot-dhw-flow-rate"></b> l/min</td>
-              </tr>
-              <tr>
-                <th scope="row">Fault code:</th>
-                <td><b class="ot-fault-code"></b></td>
-              </tr>
-              <tr>
-                <th scope="row">Indoor temp:</th>
-                <td><b class="indoor-temp"></b> C</td>
-              </tr>
-              <tr>
-                <th scope="row">Outdoor temp:</th>
-                <td><b class="outdoor-temp"></b> C</td>
-              </tr>
-              <tr>
-                <th scope="row">Heating temp:</th>
-                <td><b class="heating-temp"></b> C</td>
-              </tr>
-              <tr>
-                <th scope="row">Heating setpoint temp:</th>
-                <td><b class="heating-setpoint-temp"></b> C</td>
-              </tr>
-              <tr>
-                <th scope="row">DHW temp:</th>
-                <td><b class="dhw-temp"></b> C</td>
-              </tr>
-            </tbody>
-          </table>
-        </div>
-      </article>
-    </main>
-
-    <footer class="container">
-      <small>
-        <b>Made by Laxilef</b>
-        • <a href="https://github.com/Laxilef/OTGateway/blob/master/LICENSE" target="_blank" class="secondary">License</a>
-        • <a href="https://github.com/Laxilef/OTGateway/blob/master/" target="_blank" class="secondary">Source code</a>
-        • <a href="https://github.com/Laxilef/OTGateway/wiki" target="_blank" class="secondary">Help</a>
-        • <a href="https://github.com/Laxilef/OTGateway/issues" target="_blank" class="secondary">Issue & questions</a>
-        • <a href="https://github.com/Laxilef/OTGateway/releases" target="_blank" class="secondary">Releases</a>
-      </small>
-    </footer>
-
-    <script src="/static/app.js"></script>
-    <script>
-      window.onload = async function () {
-        setTimeout(async function onLoadPage() {
-          await loadNetworkStatus();
-          await loadVars();
-
-          setTimeout(onLoadPage, 10000);
-        }, 1000);
-      };
-    </script>
-  </body>
-</html>
--- a/data/settings.html
+++ b/data/settings.html
@@ -1,353 +0,0 @@
-<!doctype html>
-<html lang="en">
-
-<head>
-  <meta charset="utf-8" />
-  <meta name="viewport" content="width=device-width, initial-scale=1" />
-  <title>Settings - OpenTherm Gateway</title>
-  <link rel="stylesheet" href="/static/pico.min.css">
-  <link rel="stylesheet" href="/static/app.css" />
-</head>
-
-<body>
-  <header class="container">
-    <nav>
-      <ul>
-        <li><a href="/"><div class="logo">OpenTherm Gateway</div></a></li>
-      </ul>
-      <ul>
-        <li><a href="https://github.com/Laxilef/OTGateway/wiki" role="button" class="secondary" target="_blank">Help</a></li>
-      </ul>
-    </nav>
-  </header>
-
-  <main class="container">
-    <article>
-      <div>
-        <hgroup>
-          <h2>Portal settings</h2>
-          <p></p>
-        </hgroup>
-
-        <div id="portal-settings-busy" aria-busy="true"></div>
-        <form action="/api/settings" id="portal-settings" class="hidden">
-          <div class="grid">
-            <label for="portal-login">
-              Login
-              <input type="text" class="portal-login" name="portal[login]" maxlength="12" required>
-            </label>
-            <label for="portal-password">
-              Password
-              <input type="password" class="portal-password" name="portal[password]" maxlength="32" required>
-            </label>
-          </div>
-          
-          <label for="portal-use-auth">
-            <input type="checkbox" class="portal-use-auth" name="portal[useAuth]" value="true">
-            Use auth
-          </label>
-          <br>
-
-          <button type="submit">Save</button>
-        </form>
-      </div>
-    </article>
-
-    <article>
-      <div>
-        <hgroup>
-          <h2>OpenTherm settings</h2>
-          <p></p>
-        </hgroup>
-
-        <div id="opentherm-settings-busy" aria-busy="true"></div>
-        <form action="/api/settings" id="opentherm-settings" class="hidden">
-          <div class="grid">
-            <label for="opentherm-in-gpio">
-              In GPIO
-              <input type="number" inputmode="numeric" class="opentherm-in-gpio" name="opentherm[inGpio]" min="0" max="254" step="1">
-            </label>
-            <label for="opentherm-in-gpio">
-              Out GPIO
-              <input type="number" inputmode="numeric" class="opentherm-out-gpio" name="opentherm[outGpio]" min="0" max="254" step="1">
-            </label>
-            <label for="opentherm-member-id-code">
-              Master MemberID code
-              <input type="number" inputmode="numeric" class="opentherm-member-id-code" name="opentherm[memberIdCode]" min="0" max="65535" step="1" required>
-            </label>
-          </div>
-
-          <fieldset>
-            <legend>Options</legend>
-            <label for="opentherm-dhw-present">
-              <input type="checkbox" class="opentherm-dhw-present" name="opentherm[dhwPresent]" value="true">
-              DHW present
-            </label>
-            <label for="opentherm-sw-mode">
-              <input type="checkbox" class="opentherm-sw-mode" name="opentherm[summerWinterMode]" value="true">
-              Summer/winter mode
-            </label>
-            <label for="opentherm-heating-ch2-enabled">
-              <input type="checkbox" class="opentherm-heating-ch2-enabled" name="opentherm[heatingCh2Enabled]" value="true">
-              Heating CH2 always enabled
-            </label>
-            <label for="opentherm-heating-ch1-to-ch2">
-              <input type="checkbox" class="opentherm-heating-ch1-to-ch2" name="opentherm[heatingCh1ToCh2]" value="true">
-              Duplicate heating CH1 to CH2
-            </label>
-            <label for="opentherm-dhw-to-ch2">
-              <input type="checkbox" class="opentherm-dhw-to-ch2" name="opentherm[dhwToCh2]" value="true">
-              Duplicate DHW to CH2
-            </label>
-            <label for="opentherm-dhw-blocking">
-              <input type="checkbox" class="opentherm-dhw-blocking" name="opentherm[dhwBlocking]" value="true">
-              DHW blocking
-            </label>
-            <label for="opentherm-sync-modulation-with-heating">
-              <input type="checkbox" class="opentherm-sync-modulation-with-heating" name="opentherm[modulationSyncWithHeating]" value="true">
-              Sync modulation with heating
-            </label>
-          </fieldset>
-
-          <button type="submit">Save</button>
-        </form>
-      </div>
-    </article>
-
-    <article>
-      <div>
-        <hgroup>
-          <h2>MQTT settings</h2>
-          <p></p>
-        </hgroup>
-
-        <div id="mqtt-settings-busy" aria-busy="true"></div>
-        <form action="/api/settings" id="mqtt-settings" class="hidden">
-          <div class="grid">
-            <label for="mqtt-server">
-              Server
-              <input type="text" class="mqtt-server" name="mqtt[server]" maxlength="80" required>
-            </label>
-            <label for="mqtt-port">
-              Port
-              <input type="number" inputmode="numeric" class="mqtt-port" name="mqtt[port]" min="1" max="65535" step="1" required>
-            </label>
-          </div>
-
-          <div class="grid">
-            <label for="mqtt-user">
-              User
-              <input type="text" class="mqtt-user" name="mqtt[user]" maxlength="32" required>
-            </label>
-            <label for="mqtt-password">
-              Password
-              <input type="password" class="mqtt-password" name="mqtt[password]" maxlength="32">
-            </label>
-          </div>
-
-          <div class="grid">
-            <label for="mqtt-prefix">
-              Prefix
-              <input type="text" class="mqtt-prefix" name="mqtt[prefix]" maxlength="32" required>
-            </label>
-            <label for="mqtt-interval">
-              Publish interval <small>(sec)</small>
-              <input type="number" inputmode="numeric" class="mqtt-interval" name="mqtt[interval]" min="3" max="60" step="1" required>
-            </label>
-          </div>
-
-          <button type="submit">Save</button>
-        </form>
-      </div>
-    </article>
-
-    <article>
-      <div>
-        <hgroup>
-          <h2>Outdoor sensor settings</h2>
-          <p></p>
-        </hgroup>
-
-        <div id="outdoor-sensor-settings-busy" aria-busy="true"></div>
-        <form action="/api/settings" id="outdoor-sensor-settings" class="hidden">
-          <fieldset>
-            <legend>Source type</legend>
-            <label>
-              <input type="radio" class="outdoor-sensor-type" name="sensors[outdoor][type]" value="0" />
-              From boiler via OpenTherm
-            </label>
-            <label>
-              <input type="radio" class="outdoor-sensor-type" name="sensors[outdoor][type]" value="1" />
-              Manual via MQTT/API
-            </label>
-            <label>
-              <input type="radio" class="outdoor-sensor-type" name="sensors[outdoor][type]" value="2" />
-              External (DS18B20)
-            </label>
-          </fieldset>
-
-          <label for="outdoor-sensor-gpio">
-            GPIO
-            <input type="number" inputmode="numeric" class="outdoor-sensor-gpio" name="sensors[outdoor][gpio]" min="0" max="254" step="1">
-          </label>
-          <label for="outdoor-sensor-offset">
-            Temp offset (calibration)
-            <input type="number" inputmode="numeric" class="outdoor-sensor-offset" name="sensors[outdoor][offset]" min="-20" max="20" step="0.01" required>
-          </label>
-
-          <button type="submit">Save</button>
-        </form>
-      </div>
-    </article>
-
-    <article>
-      <div>
-        <hgroup>
-          <h2>Indoor sensor settings</h2>
-          <p></p>
-        </hgroup>
-
-        <div id="indoor-sensor-settings-busy" aria-busy="true"></div>
-        <form action="/api/settings" id="indoor-sensor-settings" class="hidden">
-          <fieldset>
-            <legend>Source type</legend>
-            <label>
-              <input type="radio" class="indoor-sensor-type" name="sensors[indoor][type]" value="1" />
-              Manual via MQTT/API
-            </label>
-            <label>
-              <input type="radio" class="indoor-sensor-type" name="sensors[indoor][type]" value="2" />
-              External (DS18B20)
-            </label>
-            <label>
-              <input type="radio" class="indoor-sensor-type" name="sensors[indoor][type]" value="3" />
-              BLE device <i>(ONLY for some ESP32 which support BLE)</i>
-            </label>
-          </fieldset>
-
-          <label for="indoor-sensor-gpio">
-            GPIO
-            <input type="number" inputmode="numeric" class="indoor-sensor-gpio" name="sensors[indoor][gpio]" min="0" max="254" step="1">
-          </label>
-
-          <div class="grid">
-            <label for="indoor-sensor-offset">
-              Temp offset (calibration)
-              <input type="number" inputmode="numeric" class="indoor-sensor-offset" name="sensors[indoor][offset]" min="-20" max="20" step="0.01" required>
-            </label>
-            <label for="indoor-sensor-ble-addresss">
-              BLE addresss
-              <input type="text" class="indoor-sensor-ble-addresss" name="sensors[indoor][bleAddresss]" pattern="([A-Fa-f0-9]{2}:){5}[A-Fa-f0-9]{2}">
-              <small>ONLY for some ESP32 which support BLE</small>
-            </label>
-          </div>
-
-          <button type="submit">Save</button>
-        </form>
-      </div>
-    </article>
-
-    <article>
-      <div>
-        <hgroup>
-          <h2>External pump settings</h2>
-          <p></p>
-        </hgroup>
-
-        <div id="extpump-settings-busy" aria-busy="true"></div>
-        <form action="/api/settings" id="extpump-settings" class="hidden">
-          <label for="extpump-use">
-            <input type="checkbox" class="extpump-use" name="externalPump[use]" value="true">
-            Use external pump
-          </label>
-          <br>
-
-          <div class="grid">
-            <label for="extpump-gpio">
-              Relay GPIO
-              <input type="number" inputmode="numeric" class="extpump-gpio" name="externalPump[gpio]" min="0" max="254" step="1">
-            </label>
-            <label for="extpump-pc-time">
-              Post circulation time <small>(min)</small>
-              <input type="number" inputmode="numeric" class="extpump-pc-time" name="externalPump[postCirculationTime]" min="1" max="120" step="1" required>
-            </label>
-          </div>
-
-          <div class="grid">
-            <label for="extpump-as-interval">
-              Anti stuck interval <small>(days)</small>
-              <input type="number" inputmode="numeric" class="extpump-as-interval" name="externalPump[antiStuckInterval]" min="1" max="366" step="1" required>
-            </label>
-            <label for="extpump-as-time">
-              Anti stuck time <small>(min)</small>
-              <input type="number" inputmode="numeric" class="extpump-as-time" name="externalPump[antiStuckTime]" min="1" max="20" step="1" required>
-            </label>
-          </div>
-
-          <button type="submit">Save</button>
-        </form>
-      </div>
-    </article>
-
-    <article>
-      <div>
-        <hgroup>
-          <h2>System settings</h2>
-          <p></p>
-        </hgroup>
-
-        <div id="system-settings-busy" aria-busy="true"></div>
-        <form action="/api/settings" id="system-settings" class="hidden">
-          <fieldset>
-            <label for="system-debug">
-              <input type="checkbox" class="system-debug" name="system[debug]" value="true">
-              Debug mode
-            </label>
-            <label for="system-use-serial">
-              <input type="checkbox" class="system-use-serial" name="system[useSerial]" value="true">
-              Enable serial port
-            </label>
-            <label for="system-use-telnet">
-              <input type="checkbox" class="system-use-telnet" name="system[useTelnet]" value="true">
-              Enable telnet
-            </label>
-          </fieldset>
-
-          <fieldset>
-            <mark>After changing this settings, the ESP must be restarted for the changes to take effect.</mark>
-          </fieldset>
-
-          <button type="submit">Save</button>
-        </form>
-      </div>
-    </article>
-  </main>
-
-  <footer class="container">
-    <small>
-      <b>Made by Laxilef</b>
-      • <a href="https://github.com/Laxilef/OTGateway/blob/master/LICENSE" target="_blank" class="secondary">License</a>
-      • <a href="https://github.com/Laxilef/OTGateway/blob/master/" target="_blank" class="secondary">Source code</a>
-      • <a href="https://github.com/Laxilef/OTGateway/wiki" target="_blank" class="secondary">Help</a>
-      • <a href="https://github.com/Laxilef/OTGateway/issues" target="_blank" class="secondary">Issue & questions</a>
-      • <a href="https://github.com/Laxilef/OTGateway/releases" target="_blank" class="secondary">Releases</a>
-    </small>
-  </footer>
-
-  <script src="/static/app.js"></script>
-  <script>
-    window.onload = async function () {
-      await loadSettings();
-
-      setupForm('#portal-settings');
-      setupForm('#opentherm-settings');
-      setupForm('#mqtt-settings');
-      setupForm('#outdoor-sensor-settings');
-      setupForm('#indoor-sensor-settings');
-      setupForm('#extpump-settings');
-      setupForm('#system-settings');
-    };
-  </script>
-</body>
-
-</html>
--- a/data/static/.gitkeep
+++ b/data/static/.gitkeep
--- a/data/static/app.css.gz
+++ b/data/static/app.css.gz
--- a/data/static/app.js.gz
+++ b/data/static/app.js.gz
--- a/data/static/favicon.ico.gz
+++ b/data/static/favicon.ico.gz
--- a/data/static/pico.min.css.gz
+++ b/data/static/pico.min.css.gz
--- a/lib/CustomOpenTherm/CustomOpenTherm.h
+++ b/lib/CustomOpenTherm/CustomOpenTherm.h
@@ -163,24 +163,13 @@ public:
  }

  // converters
-  float fromF88(unsigned long response) {
-    const byte valueLB = response & 0xFF;
-    const byte valueHB = (response >> 8) & 0xFF;
-
-    float value = (int8_t)valueHB;
-    return value + (float)valueLB / 256.0;
-  }
-
-  template <class T> unsigned int toF88(T val) {
+  template <class T>
+  static unsigned int toFloat(const T val) {
    return (unsigned int)(val * 256);
  }

-  int16_t fromS16(unsigned long response) {
-    const byte valueLB = response & 0xFF;
-    const byte valueHB = (response >> 8) & 0xFF;
-
-    int16_t value = valueHB;
-    return ((value << 8) + valueLB);
+  static short getInt(const unsigned long response) {
+    return response & 0xffff;
  }

 protected:
--- a/lib/HomeAssistantHelper/strings.h
+++ b/lib/HomeAssistantHelper/strings.h
@@ -33,6 +33,8 @@ const char HA_AVAILABILITY_MODE[]               PROGMEM = "availability_mode";
 const char HA_TOPIC[]                           PROGMEM = "topic";
 const char HA_DEVICE_CLASS[]                    PROGMEM = "device_class";
 const char HA_UNIT_OF_MEASUREMENT[]             PROGMEM = "unit_of_measurement";
+const char HA_UNIT_OF_MEASUREMENT_C[]           PROGMEM = "°C";
+const char HA_UNIT_OF_MEASUREMENT_F[]           PROGMEM = "°F";
 const char HA_ICON[]                            PROGMEM = "icon";
 const char HA_MIN[]                             PROGMEM = "min";
 const char HA_MAX[]                             PROGMEM = "max";
@@ -50,6 +52,7 @@ const char HA_TEMPERATURE_COMMAND_TOPIC[]       PROGMEM = "temperature_command_t
 const char HA_TEMPERATURE_COMMAND_TEMPLATE[]    PROGMEM = "temperature_command_template";
 const char HA_TEMPERATURE_STATE_TOPIC[]         PROGMEM = "temperature_state_topic";
 const char HA_TEMPERATURE_STATE_TEMPLATE[]      PROGMEM = "temperature_state_template";
+const char HA_TEMPERATURE_UNIT[]                PROGMEM = "temperature_unit";
 const char HA_MODE_COMMAND_TOPIC[]              PROGMEM = "mode_command_topic";
 const char HA_MODE_COMMAND_TEMPLATE[]           PROGMEM = "mode_command_template";
 const char HA_MODE_STATE_TOPIC[]                PROGMEM = "mode_state_topic";
--- a/lib/Network/NetworkManager.h
+++ b/lib/Network/NetworkManager.h
@@ -67,7 +67,7 @@ namespace Network {
      return this;
    }

-    Manager* setStaticConfig(IPAddress &ip, IPAddress &gateway, IPAddress &subnet, IPAddress &dns) {
+    Manager* setStaticConfig(IPAddress& ip, IPAddress& gateway, IPAddress& subnet, IPAddress& dns) {
      this->staticIp = ip;
      this->staticGateway = gateway;
      this->staticSubnet = subnet;
@@ -181,7 +181,12 @@ namespace Network {
      wifi_station_dhcpc_set_maxtry(5);
      #endif

+      #ifdef ARDUINO_ARCH_ESP32
+      // Nothing. Because memory leaks when turn off WiFi on ESP32, bug?
+      return true;
+      #else
      return WiFi.mode(WIFI_OFF);
+      #endif
    }

    void reconnect() {
@@ -328,12 +333,12 @@ namespace Network {
        } else if (!this->isConnecting() && this->hasStaCredentials() && (!this->prevReconnectingTime || millis() - this->prevReconnectingTime > this->reconnectInterval)) {
          Log.sinfoln(FPSTR(L_NETWORK), F("Try connect..."));

-          this->reconnectFlag = false;        
+          this->reconnectFlag = false;
          Connection::reset();
          if (!this->connect(true, this->connectionTimeout)) {
            Log.straceln(FPSTR(L_NETWORK), F("Connection failed. Status: %d, reason: %d"), Connection::getStatus(), Connection::getDisconnectReason());
          }
-          
+
          this->prevReconnectingTime = millis();
        }
      }
--- a/lib/WebServerHandlers/StaticPage.h
+++ b/lib/WebServerHandlers/StaticPage.h
@@ -1,4 +1,7 @@
 #include <FS.h>
+#include <detail/mimetable.h>
+
+using namespace mime;

 class StaticPage : public RequestHandler {
 public:
@@ -61,6 +64,14 @@ public:
    }
    #endif

+    if (!this->path.endsWith(FPSTR(mimeTable[gz].endsWith)) && !this->fs->exists(path))  {
+      String pathWithGz = this->path + FPSTR(mimeTable[gz].endsWith);
+
+      if (this->fs->exists(pathWithGz)) {
+        this->path += FPSTR(mimeTable[gz].endsWith);
+      }
+    }
+
    File file = this->fs->open(this->path, "r");
    if (!file) {
      return false;
@@ -93,6 +104,6 @@ protected:
  BeforeSendCallback beforeSendCallback;
  String eTag;
  const char* uri = nullptr;
-  const char* path = nullptr;
+  String path;
  const char* cacheHeader = nullptr;
 };
--- a/platformio.ini
+++ b/platformio.ini
@@ -15,9 +15,9 @@ extra_configs = secrets.default.ini
 [env]
 framework = arduino
 lib_deps = 
-	bblanchon/ArduinoJson@^7.0.3
+	bblanchon/ArduinoJson@^7.0.4
 	;ihormelnyk/OpenTherm Library@^1.1.5
-	https://github.com/ihormelnyk/opentherm_library.git
+	https://github.com/Laxilef/opentherm_library/archive/refs/heads/fix_lambda.zip
 	arduino-libraries/ArduinoMqttClient@^0.1.8
 	lennarthennigs/ESP Telnet@^2.2
 	gyverlibs/FileData@^1.0.2
@@ -30,7 +30,7 @@ build_flags =
 	-D PIO_FRAMEWORK_ARDUINO_ESPRESSIF_SDK305
 	-mtext-section-literals
 	-D MQTT_CLIENT_STD_FUNCTION_CALLBACK=1
-	;-D DEBUG_ESP_CORE -D DEBUG_ESP_WIFI -D DEBUG_ESP_PORT=Serial
+	;-D DEBUG_ESP_CORE -D DEBUG_ESP_WIFI -D DEBUG_ESP_HTTP_SERVER -D DEBUG_ESP_PORT=Serial
 	-D USE_SERIAL=${secrets.use_serial}
 	-D USE_TELNET=${secrets.use_telnet}
 	-D DEBUG_BY_DEFAULT=${secrets.debug}
@@ -51,23 +51,22 @@ monitor_speed = 115200
 monitor_filters = direct
 board_build.flash_mode = dio
 board_build.filesystem = littlefs
-version = 1.4.0-rc.17
+version = 1.4.0-rc.22

 ; Defaults
 [esp8266_defaults]
 platform = espressif8266
 lib_deps = 
 	${env.lib_deps}
-	nrwiersma/ESP8266Scheduler@^1.1
+	nrwiersma/ESP8266Scheduler@^1.2
 lib_ignore = 
 extra_scripts = 
 	post:tools/build.py
 build_flags = ${env.build_flags}
-board_build.ldscript = eagle.flash.1m256.ld
-;board_build.ldscript = eagle.flash.4m1m.ld
+board_build.ldscript = eagle.flash.4m1m.ld

 [esp32_defaults]
-platform = espressif32@^6.5
+platform = espressif32@^6.6
 board_build.partitions = esp32_partitions.csv
 lib_deps =
 	${env.lib_deps}
@@ -95,8 +94,8 @@ build_flags =
 	-D DEFAULT_OT_OUT_GPIO=5
 	-D DEFAULT_SENSOR_OUTDOOR_GPIO=12
 	-D DEFAULT_SENSOR_INDOOR_GPIO=14
-	-D LED_STATUS_GPIO=13
-	-D LED_OT_RX_GPIO=15
+	-D DEFAULT_STATUS_LED_GPIO=13
+	-D DEFAULT_OT_RX_LED_GPIO=15

 [env:d1_mini_lite]
 platform = ${esp8266_defaults.platform}
@@ -111,8 +110,8 @@ build_flags =
 	-D DEFAULT_OT_OUT_GPIO=5
 	-D DEFAULT_SENSOR_OUTDOOR_GPIO=12
 	-D DEFAULT_SENSOR_INDOOR_GPIO=14
-	-D LED_STATUS_GPIO=13
-	-D LED_OT_RX_GPIO=15
+	-D DEFAULT_STATUS_LED_GPIO=13
+	-D DEFAULT_OT_RX_LED_GPIO=15

 [env:d1_mini_pro]
 platform = ${esp8266_defaults.platform}
@@ -127,8 +126,8 @@ build_flags =
 	-D DEFAULT_OT_OUT_GPIO=5
 	-D DEFAULT_SENSOR_OUTDOOR_GPIO=12
 	-D DEFAULT_SENSOR_INDOOR_GPIO=14
-	-D LED_STATUS_GPIO=13
-	-D LED_OT_RX_GPIO=15
+	-D DEFAULT_STATUS_LED_GPIO=13
+	-D DEFAULT_OT_RX_LED_GPIO=15

 [env:s2_mini]
 platform = ${esp32_defaults.platform}
@@ -143,8 +142,8 @@ build_flags =
 	-D DEFAULT_OT_OUT_GPIO=35
 	-D DEFAULT_SENSOR_OUTDOOR_GPIO=9
 	-D DEFAULT_SENSOR_INDOOR_GPIO=7
-	-D LED_STATUS_GPIO=11
-	-D LED_OT_RX_GPIO=12
+	-D DEFAULT_STATUS_LED_GPIO=11
+	-D DEFAULT_OT_RX_LED_GPIO=12

 [env:s3_mini] 
 platform = ${esp32_defaults.platform}
@@ -162,8 +161,8 @@ build_flags =
 	-D DEFAULT_OT_OUT_GPIO=36
 	-D DEFAULT_SENSOR_OUTDOOR_GPIO=13
 	-D DEFAULT_SENSOR_INDOOR_GPIO=12
-	-D LED_STATUS_GPIO=11
-	-D LED_OT_RX_GPIO=10
+	-D DEFAULT_STATUS_LED_GPIO=11
+	-D DEFAULT_OT_RX_LED_GPIO=10

 [env:c3_mini] 
 platform = ${esp32_defaults.platform}
@@ -183,8 +182,8 @@ build_flags =
 	-D DEFAULT_OT_OUT_GPIO=10
 	-D DEFAULT_SENSOR_OUTDOOR_GPIO=0
 	-D DEFAULT_SENSOR_INDOOR_GPIO=1
-	-D LED_STATUS_GPIO=4
-	-D LED_OT_RX_GPIO=5
+	-D DEFAULT_STATUS_LED_GPIO=4
+	-D DEFAULT_OT_RX_LED_GPIO=5

 [env:nodemcu_32s]
 platform = ${esp32_defaults.platform}
@@ -202,8 +201,8 @@ build_flags =
 	-D DEFAULT_OT_OUT_GPIO=22
 	-D DEFAULT_SENSOR_OUTDOOR_GPIO=12
 	-D DEFAULT_SENSOR_INDOOR_GPIO=13
-	-D LED_STATUS_GPIO=2 ; 18
-	-D LED_OT_RX_GPIO=19
+	-D DEFAULT_STATUS_LED_GPIO=2 ; 18
+	-D DEFAULT_OT_RX_LED_GPIO=19
 	;-D WOKWI=1

 [env:d1_mini32]
@@ -222,5 +221,5 @@ build_flags =
 	-D DEFAULT_OT_OUT_GPIO=22
 	-D DEFAULT_SENSOR_OUTDOOR_GPIO=12
 	-D DEFAULT_SENSOR_INDOOR_GPIO=18
-	-D LED_STATUS_GPIO=2
-	-D LED_OT_RX_GPIO=19
+	-D DEFAULT_STATUS_LED_GPIO=2
+	-D DEFAULT_OT_RX_LED_GPIO=19
--- a/src/HaHelper.h
+++ b/src/HaHelper.h
@@ -27,22 +27,31 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SWITCH), F("emergency")).c_str(), doc);
  }

-  bool publishNumberEmergencyTarget(bool enabledByDefault = true) {
+  bool publishNumberEmergencyTarget(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
    doc[FPSTR(HA_UNIQUE_ID)] = this->getObjectId(F("emergency_target"));
    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("emergency_target"));
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("config");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      doc[FPSTR(HA_MIN)] = 5;
+      doc[FPSTR(HA_MAX)] = 50;
+
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+      doc[FPSTR(HA_MIN)] = 41;
+      doc[FPSTR(HA_MAX)] = 122;
+    }
+    
    doc[FPSTR(HA_NAME)] = F("Emergency target temp");
    doc[FPSTR(HA_ICON)] = F("mdi:thermometer-alert");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("settings"));
    doc[FPSTR(HA_VALUE_TEMPLATE)] = F("{{ value_json.emergency.target|float(0)|round(1) }}");
    doc[FPSTR(HA_COMMAND_TOPIC)] = this->getDeviceTopic(F("settings/set"));
    doc[FPSTR(HA_COMMAND_TEMPLATE)] = F("{\"emergency\": {\"target\" : {{ value }}}}");
-    doc[FPSTR(HA_MIN)] = 5;
-    doc[FPSTR(HA_MAX)] = 50;
    doc[FPSTR(HA_STEP)] = 0.5;
    doc[FPSTR(HA_MODE)] = "box";
    doc[FPSTR(HA_EXPIRE_AFTER)] = 120;
@@ -142,7 +151,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SWITCH), F("heating_turbo")).c_str(), doc);
  }

-  bool publishNumberHeatingTarget(byte minTemp = 20, byte maxTemp = 90, bool enabledByDefault = true) {
+  bool publishNumberHeatingTarget(UnitSystem unit = UnitSystem::METRIC, byte minTemp = 20, byte maxTemp = 90, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
@@ -150,7 +159,14 @@ public:
    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("heating_target"));
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("config");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
    doc[FPSTR(HA_NAME)] = F("Heating target");
    doc[FPSTR(HA_ICON)] = F("mdi:radiator");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("settings"));
@@ -167,14 +183,21 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_NUMBER), F("heating_target")).c_str(), doc);
  }

-  bool publishNumberHeatingHysteresis(bool enabledByDefault = true) {
+  bool publishNumberHeatingHysteresis(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
    doc[FPSTR(HA_UNIQUE_ID)] = this->getObjectId(F("heating_hysteresis"));
    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("heating_hysteresis"));
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("config");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
    doc[FPSTR(HA_NAME)] = F("Heating hysteresis");
    doc[FPSTR(HA_ICON)] = F("mdi:altimeter");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("settings"));
@@ -191,7 +214,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_NUMBER), F("heating_hysteresis")).c_str(), doc);
  }

-  bool publishSensorHeatingSetpoint(bool enabledByDefault = true) {
+  bool publishSensorHeatingSetpoint(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
@@ -200,7 +223,14 @@ public:
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
    doc[FPSTR(HA_NAME)] = F("Heating setpoint");
    doc[FPSTR(HA_ICON)] = F("mdi:coolant-temperature");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -211,7 +241,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("heating_setpoint")).c_str(), doc);
  }

-  bool publishSensorBoilerHeatingMinTemp(bool enabledByDefault = true) {
+  bool publishSensorBoilerHeatingMinTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][0][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_AVAILABILITY)][1][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -223,7 +253,14 @@ public:
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
    doc[FPSTR(HA_NAME)] = F("Boiler heating min temp");
    doc[FPSTR(HA_ICON)] = F("mdi:thermometer-chevron-down");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -234,7 +271,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("boiler_heating_min_temp")).c_str(), doc);
  }

-  bool publishSensorBoilerHeatingMaxTemp(bool enabledByDefault = true) {
+  bool publishSensorBoilerHeatingMaxTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][0][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_AVAILABILITY)][1][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -246,7 +283,14 @@ public:
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
    doc[FPSTR(HA_NAME)] = F("Boiler heating max temp");
    doc[FPSTR(HA_ICON)] = F("mdi:thermometer-chevron-up");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -257,22 +301,31 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("boiler_heating_max_temp")).c_str(), doc);
  }

-  bool publishNumberHeatingMinTemp(bool enabledByDefault = true) {
+  bool publishNumberHeatingMinTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
    doc[FPSTR(HA_UNIQUE_ID)] = this->getObjectId(F("heating_min_temp"));
    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("heating_min_temp"));
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("config");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      doc[FPSTR(HA_MIN)] = 0;
+      doc[FPSTR(HA_MAX)] = 99;
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+      doc[FPSTR(HA_MIN)] = 32;
+      doc[FPSTR(HA_MAX)] = 211;
+    }
+
    doc[FPSTR(HA_NAME)] = F("Heating min temp");
    doc[FPSTR(HA_ICON)] = F("mdi:thermometer-chevron-down");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("settings"));
    doc[FPSTR(HA_VALUE_TEMPLATE)] = F("{{ value_json.heating.minTemp|float(0)|round(1) }}");
    doc[FPSTR(HA_COMMAND_TOPIC)] = this->getDeviceTopic(F("settings/set"));
    doc[FPSTR(HA_COMMAND_TEMPLATE)] = F("{\"heating\": {\"minTemp\" : {{ value }}}}");
-    doc[FPSTR(HA_MIN)] = 0;
-    doc[FPSTR(HA_MAX)] = 99;
    doc[FPSTR(HA_STEP)] = 1;
    doc[FPSTR(HA_MODE)] = "box";
    doc[FPSTR(HA_EXPIRE_AFTER)] = 120;
@@ -281,22 +334,31 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_NUMBER), F("heating_min_temp")).c_str(), doc);
  }

-  bool publishNumberHeatingMaxTemp(bool enabledByDefault = true) {
+  bool publishNumberHeatingMaxTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
    doc[FPSTR(HA_UNIQUE_ID)] = this->getObjectId(F("heating_max_temp"));
    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("heating_max_temp"));
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("config");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      doc[FPSTR(HA_MIN)] = 1;
+      doc[FPSTR(HA_MAX)] = 100;
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+      doc[FPSTR(HA_MIN)] = 33;
+      doc[FPSTR(HA_MAX)] = 212;
+    }
+
    doc[FPSTR(HA_NAME)] = F("Heating max temp");
    doc[FPSTR(HA_ICON)] = F("mdi:thermometer-chevron-up");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("settings"));
    doc[FPSTR(HA_VALUE_TEMPLATE)] = F("{{ value_json.heating.maxTemp|float(0)|round(1) }}");
    doc[FPSTR(HA_COMMAND_TOPIC)] = this->getDeviceTopic(F("settings/set"));
    doc[FPSTR(HA_COMMAND_TEMPLATE)] = F("{\"heating\": {\"maxTemp\" : {{ value }}}}");
-    doc[FPSTR(HA_MIN)] = 1;
-    doc[FPSTR(HA_MAX)] = 100;
    doc[FPSTR(HA_STEP)] = 1;
    doc[FPSTR(HA_MODE)] = "box";
    doc[FPSTR(HA_EXPIRE_AFTER)] = 120;
@@ -352,7 +414,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SWITCH), F("dhw")).c_str(), doc);
  }

-  bool publishNumberDhwTarget(byte minTemp = 40, byte maxTemp = 60, bool enabledByDefault = true) {
+  bool publishNumberDhwTarget(UnitSystem unit = UnitSystem::METRIC, byte minTemp = 40, byte maxTemp = 60, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
@@ -360,7 +422,14 @@ public:
    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("dhw_target"));
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("config");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
    doc[FPSTR(HA_NAME)] = F("DHW target");
    doc[FPSTR(HA_ICON)] = F("mdi:water-pump");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("settings"));
@@ -377,7 +446,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_NUMBER), F("dhw_target")).c_str(), doc);
  }

-  bool publishSensorBoilerDhwMinTemp(bool enabledByDefault = true) {
+  bool publishSensorBoilerDhwMinTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][0][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_AVAILABILITY)][1][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -389,7 +458,14 @@ public:
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
    doc[FPSTR(HA_NAME)] = F("Boiler DHW min temp");
    doc[FPSTR(HA_ICON)] = F("mdi:thermometer-chevron-down");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -400,7 +476,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("boiler_dhw_min_temp")).c_str(), doc);
  }

-  bool publishSensorBoilerDhwMaxTemp(bool enabledByDefault = true) {
+  bool publishSensorBoilerDhwMaxTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][0][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_AVAILABILITY)][1][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -412,7 +488,14 @@ public:
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
    doc[FPSTR(HA_NAME)] = F("Boiler DHW max temp");
    doc[FPSTR(HA_ICON)] = F("mdi:thermometer-chevron-up");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -423,22 +506,31 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("boiler_dhw_max_temp")).c_str(), doc);
  }

-  bool publishNumberDhwMinTemp(bool enabledByDefault = true) {
+  bool publishNumberDhwMinTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
    doc[FPSTR(HA_UNIQUE_ID)] = this->getObjectId(F("dhw_min_temp"));
    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("dhw_min_temp"));
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("config");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      doc[FPSTR(HA_MIN)] = 0;
+      doc[FPSTR(HA_MAX)] = 99;
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+      doc[FPSTR(HA_MIN)] = 32;
+      doc[FPSTR(HA_MAX)] = 211;
+    }
+
    doc[FPSTR(HA_NAME)] = F("DHW min temp");
    doc[FPSTR(HA_ICON)] = F("mdi:thermometer-chevron-down");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("settings"));
    doc[FPSTR(HA_VALUE_TEMPLATE)] = F("{{ value_json.dhw.minTemp|float(0)|round(1) }}");
    doc[FPSTR(HA_COMMAND_TOPIC)] = this->getDeviceTopic(F("settings/set"));
    doc[FPSTR(HA_COMMAND_TEMPLATE)] = F("{\"dhw\": {\"minTemp\" : {{ value }}}}");
-    doc[FPSTR(HA_MIN)] = 0;
-    doc[FPSTR(HA_MAX)] = 99;
    doc[FPSTR(HA_STEP)] = 1;
    doc[FPSTR(HA_MODE)] = "box";
    doc[FPSTR(HA_EXPIRE_AFTER)] = 120;
@@ -447,22 +539,31 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_NUMBER), F("dhw_min_temp")).c_str(), doc);
  }

-  bool publishNumberDhwMaxTemp(bool enabledByDefault = true) {
+  bool publishNumberDhwMaxTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
    doc[FPSTR(HA_UNIQUE_ID)] = this->getObjectId(F("dhw_max_temp"));
    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("dhw_max_temp"));
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("config");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      doc[FPSTR(HA_MIN)] = 1;
+      doc[FPSTR(HA_MAX)] = 100;
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+      doc[FPSTR(HA_MIN)] = 33;
+      doc[FPSTR(HA_MAX)] = 212;
+    }
+
    doc[FPSTR(HA_NAME)] = F("DHW max temp");
    doc[FPSTR(HA_ICON)] = F("mdi:thermometer-chevron-up");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("settings"));
    doc[FPSTR(HA_VALUE_TEMPLATE)] = F("{{ value_json.dhw.maxTemp|float(0)|round(1) }}");
    doc[FPSTR(HA_COMMAND_TOPIC)] = this->getDeviceTopic(F("settings/set"));
    doc[FPSTR(HA_COMMAND_TEMPLATE)] = F("{\"dhw\": {\"maxTemp\" : {{ value }}}}");
-    doc[FPSTR(HA_MIN)] = 1;
-    doc[FPSTR(HA_MAX)] = 100;
    doc[FPSTR(HA_STEP)] = 1;
    doc[FPSTR(HA_MODE)] = "box";
    doc[FPSTR(HA_EXPIRE_AFTER)] = 120;
@@ -579,22 +680,31 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_NUMBER), F("pid_dt")).c_str(), doc);
  }

-  bool publishNumberPidMinTemp(bool enabledByDefault = true) {
+  bool publishNumberPidMinTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
    doc[FPSTR(HA_UNIQUE_ID)] = this->getObjectId(F("pid_min_temp"));
    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("pid_min_temp"));
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("config");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      doc[FPSTR(HA_MIN)] = 0;
+      doc[FPSTR(HA_MAX)] = 99;
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+      doc[FPSTR(HA_MIN)] = 0;
+      doc[FPSTR(HA_MAX)] = 211;
+    }
+
    doc[FPSTR(HA_NAME)] = F("PID min temp");
    doc[FPSTR(HA_ICON)] = F("mdi:thermometer-chevron-down");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("settings"));
    doc[FPSTR(HA_VALUE_TEMPLATE)] = F("{{ value_json.pid.minTemp|float(0)|round(1) }}");
    doc[FPSTR(HA_COMMAND_TOPIC)] = this->getDeviceTopic(F("settings/set"));
    doc[FPSTR(HA_COMMAND_TEMPLATE)] = F("{\"pid\": {\"minTemp\" : {{ value }}}}");
-    doc[FPSTR(HA_MIN)] = 0;
-    doc[FPSTR(HA_MAX)] = 99;
    doc[FPSTR(HA_STEP)] = 1;
    doc[FPSTR(HA_MODE)] = "box";
    doc[FPSTR(HA_EXPIRE_AFTER)] = 120;
@@ -603,22 +713,31 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_NUMBER), F("pid_min_temp")).c_str(), doc);
  }

-  bool publishNumberPidMaxTemp(bool enabledByDefault = true) {
+  bool publishNumberPidMaxTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
    doc[FPSTR(HA_UNIQUE_ID)] = this->getObjectId(F("pid_max_temp"));
    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("pid_max_temp"));
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("config");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      doc[FPSTR(HA_MIN)] = 1;
+      doc[FPSTR(HA_MAX)] = 100;
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+      doc[FPSTR(HA_MIN)] = 1;
+      doc[FPSTR(HA_MAX)] = 212;
+    }
+
    doc[FPSTR(HA_NAME)] = F("PID max temp");
    doc[FPSTR(HA_ICON)] = F("mdi:thermometer-chevron-up");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("settings"));
    doc[FPSTR(HA_VALUE_TEMPLATE)] = F("{{ value_json.pid.maxTemp|float(0)|round(1) }}");
    doc[FPSTR(HA_COMMAND_TOPIC)] = this->getDeviceTopic(F("settings/set"));
    doc[FPSTR(HA_COMMAND_TEMPLATE)] = F("{\"pid\": {\"maxTemp\" : {{ value }}}}");
-    doc[FPSTR(HA_MIN)] = 1;
-    doc[FPSTR(HA_MAX)] = 100;
    doc[FPSTR(HA_STEP)] = 1;
    doc[FPSTR(HA_MODE)] = "box";
    doc[FPSTR(HA_EXPIRE_AFTER)] = 120;
@@ -980,7 +1099,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("modulation")).c_str(), doc);
  }

-  bool publishSensorPressure(bool enabledByDefault = true) {
+  bool publishSensorPressure(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][0][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_AVAILABILITY)][1][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -992,7 +1111,14 @@ public:
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("pressure");
    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("bar");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("bar");
+
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("psi");
+    }
+
    doc[FPSTR(HA_NAME)] = F("Pressure");
    doc[FPSTR(HA_ICON)] = F("mdi:gauge");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -1003,7 +1129,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("pressure")).c_str(), doc);
  }

-  bool publishSensorDhwFlowRate(bool enabledByDefault = true) {
+  bool publishSensorDhwFlowRate(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][0][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_AVAILABILITY)][1][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -1015,7 +1141,14 @@ public:
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("volume_flow_rate");
    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("L/min");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("L/min");
+
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("gal/min");
+    }
+
    doc[FPSTR(HA_NAME)] = F("DHW flow rate");
    doc[FPSTR(HA_ICON)] = F("mdi:water-pump");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -1027,21 +1160,30 @@ public:
  }


-  bool publishNumberIndoorTemp(bool enabledByDefault = true) {
+  bool publishNumberIndoorTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
    doc[FPSTR(HA_UNIQUE_ID)] = this->getObjectId(F("indoor_temp"));
    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("indoor_temp"));
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("config");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      doc[FPSTR(HA_MIN)] = -99;
+      doc[FPSTR(HA_MAX)] = 99;
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+      doc[FPSTR(HA_MIN)] = -147;
+      doc[FPSTR(HA_MAX)] = 211;
+    }
+
    doc[FPSTR(HA_NAME)] = F("Indoor temperature");
    doc[FPSTR(HA_ICON)] = F("mdi:home-thermometer");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
    doc[FPSTR(HA_VALUE_TEMPLATE)] = F("{{ value_json.temperatures.indoor|float(0)|round(1) }}");
    doc[FPSTR(HA_COMMAND_TOPIC)] = this->getDeviceTopic(F("state/set"));
    doc[FPSTR(HA_COMMAND_TEMPLATE)] = F("{\"temperatures\": {\"indoor\":{{ value }}}}");
-    doc[FPSTR(HA_MIN)] = -99;
-    doc[FPSTR(HA_MAX)] = 99;
    doc[FPSTR(HA_STEP)] = 0.01;
    doc[FPSTR(HA_MODE)] = "box";
    doc[FPSTR(HA_EXPIRE_AFTER)] = 120;
@@ -1050,7 +1192,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_NUMBER), F("indoor_temp")).c_str(), doc);
  }

-  bool publishSensorIndoorTemp(bool enabledByDefault = true) {
+  bool publishSensorIndoorTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
@@ -1059,7 +1201,14 @@ public:
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
    doc[FPSTR(HA_NAME)] = F("Indoor temperature");
    doc[FPSTR(HA_ICON)] = F("mdi:home-thermometer");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -1070,21 +1219,30 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("indoor_temp")).c_str(), doc);
  }

-  bool publishNumberOutdoorTemp(bool enabledByDefault = true) {
+  bool publishNumberOutdoorTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
    doc[FPSTR(HA_UNIQUE_ID)] = this->getObjectId(F("outdoor_temp"));
    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("outdoor_temp"));
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("config");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      doc[FPSTR(HA_MIN)] = -99;
+      doc[FPSTR(HA_MAX)] = 99;
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+      doc[FPSTR(HA_MIN)] = -147;
+      doc[FPSTR(HA_MAX)] = 211;
+    }
+
    doc[FPSTR(HA_NAME)] = F("Outdoor temperature");
    doc[FPSTR(HA_ICON)] = F("mdi:home-thermometer-outline");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
    doc[FPSTR(HA_VALUE_TEMPLATE)] = F("{{ value_json.temperatures.outdoor|float(0)|round(1) }}");
    doc[FPSTR(HA_COMMAND_TOPIC)] = this->getDeviceTopic(F("state/set"));
    doc[FPSTR(HA_COMMAND_TEMPLATE)] = F("{\"temperatures\": {\"outdoor\":{{ value }}}}");
-    doc[FPSTR(HA_MIN)] = -99;
-    doc[FPSTR(HA_MAX)] = 99;
    doc[FPSTR(HA_STEP)] = 0.01;
    doc[FPSTR(HA_MODE)] = "box";
    doc[FPSTR(HA_EXPIRE_AFTER)] = 120;
@@ -1093,7 +1251,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_NUMBER), F("outdoor_temp")).c_str(), doc);
  }

-  bool publishSensorOutdoorTemp(bool enabledByDefault = true) {
+  bool publishSensorOutdoorTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
@@ -1102,7 +1260,14 @@ public:
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
    doc[FPSTR(HA_NAME)] = F("Outdoor temperature");
    doc[FPSTR(HA_ICON)] = F("mdi:home-thermometer-outline");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -1113,7 +1278,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("outdoor_temp")).c_str(), doc);
  }

-  bool publishSensorHeatingTemp(bool enabledByDefault = true) {
+  bool publishSensorHeatingTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][0][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_AVAILABILITY)][1][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -1125,7 +1290,14 @@ public:
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
    doc[FPSTR(HA_NAME)] = F("Heating temperature");
    doc[FPSTR(HA_ICON)] = F("mdi:radiator");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -1136,7 +1308,37 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("heating_temp")).c_str(), doc);
  }

-  bool publishSensorDhwTemp(bool enabledByDefault = true) {
+  bool publishSensorHeatingReturnTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
+    JsonDocument doc;
+    doc[FPSTR(HA_AVAILABILITY)][0][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
+    doc[FPSTR(HA_AVAILABILITY)][1][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("state"));
+    doc[FPSTR(HA_AVAILABILITY)][1][FPSTR(HA_VALUE_TEMPLATE)] = F("{{ iif(value_json.states.otStatus, 'online', 'offline') }}");
+    doc[FPSTR(HA_AVAILABILITY_MODE)] = F("all");
+    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
+    doc[FPSTR(HA_UNIQUE_ID)] = this->getObjectId(F("heating_return_temp"));
+    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("heating_return_temp"));
+    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
+    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
+    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
+    doc[FPSTR(HA_NAME)] = F("Heating return temperature");
+    doc[FPSTR(HA_ICON)] = F("mdi:radiator");
+    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
+    doc[FPSTR(HA_VALUE_TEMPLATE)] = F("{{ value_json.temperatures.heatingReturn|float(0)|round(2) }}");
+    doc[FPSTR(HA_EXPIRE_AFTER)] = 120;
+    doc.shrinkToFit();
+
+    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("heating_return_temp")).c_str(), doc);
+  }
+
+  bool publishSensorDhwTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][0][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_AVAILABILITY)][1][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -1148,7 +1350,14 @@ public:
    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
-    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("°C");
+
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
    doc[FPSTR(HA_NAME)] = F("DHW temperature");
    doc[FPSTR(HA_ICON)] = F("mdi:water-pump");
    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
@@ -1159,8 +1368,38 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("dhw_temp")).c_str(), doc);
  }

+  bool publishSensorExhaustTemp(UnitSystem unit = UnitSystem::METRIC, bool enabledByDefault = true) {
+    JsonDocument doc;
+    doc[FPSTR(HA_AVAILABILITY)][0][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
+    doc[FPSTR(HA_AVAILABILITY)][1][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("state"));
+    doc[FPSTR(HA_AVAILABILITY)][1][FPSTR(HA_VALUE_TEMPLATE)] = F("{{ iif(value_json.states.otStatus, 'online', 'offline') }}");
+    doc[FPSTR(HA_AVAILABILITY_MODE)] = F("all");
+    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
+    doc[FPSTR(HA_UNIQUE_ID)] = this->getObjectId(F("exhaust_temp"));
+    doc[FPSTR(HA_OBJECT_ID)] = this->getObjectId(F("exhaust_temp"));
+    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
+    doc[FPSTR(HA_DEVICE_CLASS)] = F("temperature");
+    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");

-  bool publishClimateHeating(byte minTemp = 20, byte maxTemp = 90, byte currentTempSource = HaHelper::TEMP_SOURCE_HEATING, bool enabledByDefault = true) {
+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_C);
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = FPSTR(HA_UNIT_OF_MEASUREMENT_F);
+    }
+
+    doc[FPSTR(HA_NAME)] = F("Exhaust temperature");
+    doc[FPSTR(HA_ICON)] = F("mdi:smoke");
+    doc[FPSTR(HA_STATE_TOPIC)] = this->getDeviceTopic(F("state"));
+    doc[FPSTR(HA_VALUE_TEMPLATE)] = F("{{ value_json.temperatures.exhaust|float(0)|round(2) }}");
+    doc[FPSTR(HA_EXPIRE_AFTER)] = 120;
+    doc.shrinkToFit();
+
+    return this->publish(this->getTopic(FPSTR(HA_ENTITY_SENSOR), F("exhaust_temp")).c_str(), doc);
+  }
+
+
+  bool publishClimateHeating(UnitSystem unit = UnitSystem::METRIC, byte minTemp = 20, byte maxTemp = 90, byte currentTempSource = HaHelper::TEMP_SOURCE_HEATING, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
@@ -1186,6 +1425,13 @@ public:
    doc[FPSTR(HA_TEMPERATURE_STATE_TOPIC)] = this->getDeviceTopic(F("settings"));
    doc[FPSTR(HA_TEMPERATURE_STATE_TEMPLATE)] = F("{{ value_json.heating.target|float(0)|round(1) }}");

+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_TEMPERATURE_UNIT)] = "C";
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_TEMPERATURE_UNIT)] = "F";
+    }
+
    doc[FPSTR(HA_MODE_COMMAND_TOPIC)] = this->getDeviceTopic(F("settings/set"));
    doc[FPSTR(HA_MODE_COMMAND_TEMPLATE)] = F("{% if value == 'heat' %}{\"heating\": {\"enable\" : true}}"
      "{% elif value == 'off' %}{\"heating\": {\"enable\" : false}}{% endif %}");
@@ -1213,7 +1459,7 @@ public:
    return this->publish(this->getTopic(FPSTR(HA_ENTITY_CLIMATE), F("heating"), '_').c_str(), doc);
  }

-  bool publishClimateDhw(byte minTemp = 40, byte maxTemp = 60, bool enabledByDefault = true) {
+  bool publishClimateDhw(UnitSystem unit = UnitSystem::METRIC, byte minTemp = 40, byte maxTemp = 60, bool enabledByDefault = true) {
    JsonDocument doc;
    doc[FPSTR(HA_AVAILABILITY)][FPSTR(HA_TOPIC)] = this->getDeviceTopic(F("status"));
    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
@@ -1231,6 +1477,13 @@ public:
    doc[FPSTR(HA_TEMPERATURE_STATE_TOPIC)] = this->getDeviceTopic(F("settings"));
    doc[FPSTR(HA_TEMPERATURE_STATE_TEMPLATE)] = F("{{ value_json.dhw.target|int(0) }}");

+    if (unit == UnitSystem::METRIC) {
+      doc[FPSTR(HA_TEMPERATURE_UNIT)] = "C";
+      
+    } else if (unit == UnitSystem::IMPERIAL) {
+      doc[FPSTR(HA_TEMPERATURE_UNIT)] = "F";
+    }
+
    doc[FPSTR(HA_MODE_COMMAND_TOPIC)] = this->getDeviceTopic(F("settings/set"));
    doc[FPSTR(HA_MODE_COMMAND_TEMPLATE)] = F("{% if value == 'heat' %}{\"dhw\": {\"enable\" : true}}"
      "{% elif value == 'off' %}{\"dhw\": {\"enable\" : false}}{% endif %}");
--- a/src/MainTask.h
+++ b/src/MainTask.h
@@ -27,7 +27,6 @@ protected:
  enum class PumpStartReason {NONE, HEATING, ANTISTUCK};

  Blinker* blinker = nullptr;
-  bool blinkerInitialized = false;
  unsigned long firstFailConnect = 0;
  unsigned long lastHeapInfo = 0;
  unsigned int minFreeHeap = 0;
@@ -51,17 +50,7 @@ protected:
    return 3;
  }

-  void setup() {
-    #ifdef LED_STATUS_GPIO
-      pinMode(LED_STATUS_GPIO, OUTPUT);
-      digitalWrite(LED_STATUS_GPIO, LOW);
-    #endif
-
-    if (GPIO_IS_VALID(settings.externalPump.gpio)) {
-      pinMode(settings.externalPump.gpio, OUTPUT);
-      digitalWrite(settings.externalPump.gpio, LOW);
-    }
-  }
+  void setup() {}

  void loop() {
    network->loop();
@@ -89,16 +78,31 @@ protected:
      Log.sinfoln(FPSTR(L_MAIN), F("Restart signal received. Restart after 10 sec."));
    }

-    if (network->isConnected()) {
-      vars.sensors.rssi = WiFi.RSSI();
+    vars.states.mqtt = tMqtt->isConnected();
+    vars.sensors.rssi = network->isConnected() ? WiFi.RSSI() : 0;

+    if (vars.states.emergency && !settings.emergency.enable) {
+      vars.states.emergency = false;
+    }
+
+    if (network->isConnected()) {
      if (!this->telnetStarted && telnetStream != nullptr) {
        telnetStream->begin(23, false);
        this->telnetStarted = true;
      }

-      if (!tMqtt->isEnabled() && strlen(settings.mqtt.server) > 0) {
+      if (settings.mqtt.enable && !tMqtt->isEnabled()) {
        tMqtt->enable();
+
+      } else if (!settings.mqtt.enable && tMqtt->isEnabled()) {
+        tMqtt->disable();
+      }
+
+      if (!vars.states.emergency && settings.emergency.enable && settings.emergency.onMqttFault && !tMqtt->isEnabled()) {
+        vars.states.emergency = true;
+
+      } else if (vars.states.emergency && !settings.emergency.onMqttFault) {
+        vars.states.emergency = false;
      }

      if (this->firstFailConnect != 0) {
@@ -122,12 +126,12 @@ protected:
        tMqtt->disable();
      }

-      if (settings.emergency.enable && !vars.states.emergency) {
+      if (!vars.states.emergency && settings.emergency.enable && settings.emergency.onNetworkFault) {
        if (this->firstFailConnect == 0) {
          this->firstFailConnect = millis();
        }

-        if (millis() - this->firstFailConnect > EMERGENCY_TIME_TRESHOLD) {
+        if (millis() - this->firstFailConnect > (settings.emergency.tresholdTime * 1000)) {
          vars.states.emergency = true;
          Log.sinfoln(FPSTR(L_MAIN), F("Emergency mode enabled"));
        }
@@ -136,9 +140,7 @@ protected:
    this->yield();


-    #ifdef LED_STATUS_GPIO
-      this->ledStatus(LED_STATUS_GPIO);
-    #endif
+    this->ledStatus();
    this->externalPump();
    this->yield();

@@ -207,16 +209,32 @@ protected:
    }
  }

-  void ledStatus(uint8_t gpio) {
+  void ledStatus() {
    uint8_t errors[4];
    uint8_t errCount = 0;
    static uint8_t errPos = 0;
    static unsigned long endBlinkTime = 0;
    static bool ledOn = false;
+    static uint8_t configuredGpio = GPIO_IS_NOT_CONFIGURED;

-    if (!this->blinkerInitialized) {
-      this->blinker->init(gpio);
-      this->blinkerInitialized = true;
+    if (settings.system.statusLedGpio != configuredGpio) {
+      if (configuredGpio != GPIO_IS_NOT_CONFIGURED) {
+        digitalWrite(configuredGpio, LOW);
+      }
+      
+      if (GPIO_IS_VALID(settings.system.statusLedGpio)) {
+        configuredGpio = settings.system.statusLedGpio;
+        pinMode(configuredGpio, OUTPUT);
+        digitalWrite(configuredGpio, LOW);
+        this->blinker->init(configuredGpio);
+
+      } else if (configuredGpio != GPIO_IS_NOT_CONFIGURED) {
+        configuredGpio = GPIO_IS_NOT_CONFIGURED;
+      }
+    }
+
+    if (configuredGpio == GPIO_IS_NOT_CONFIGURED) {
+      return;
    }

    if (!network->isConnected()) {
@@ -243,14 +261,14 @@ protected:
    if (!this->blinker->running() && millis() - endBlinkTime >= 5000) {
      if (errCount == 0) {
        if (!ledOn) {
-          digitalWrite(gpio, HIGH);
+          digitalWrite(configuredGpio, HIGH);
          ledOn = true;
        }

        return;

      } else if (ledOn) {
-        digitalWrite(gpio, LOW);
+        digitalWrite(configuredGpio, LOW);
        ledOn = false;
        endBlinkTime = millis();
        return;
@@ -271,6 +289,34 @@ protected:
  }

  void externalPump() {
+    static uint8_t configuredGpio = GPIO_IS_NOT_CONFIGURED;
+
+    if (settings.externalPump.gpio != configuredGpio) {
+      if (configuredGpio != GPIO_IS_NOT_CONFIGURED) {
+        digitalWrite(configuredGpio, LOW);
+      }
+      
+      if (GPIO_IS_VALID(settings.externalPump.gpio)) {
+        configuredGpio = settings.externalPump.gpio;
+        pinMode(configuredGpio, OUTPUT);
+        digitalWrite(configuredGpio, LOW);
+
+      } else if (configuredGpio != GPIO_IS_NOT_CONFIGURED) {
+        configuredGpio = GPIO_IS_NOT_CONFIGURED;
+      }
+    }
+
+    if (configuredGpio == GPIO_IS_NOT_CONFIGURED) {
+      if (vars.states.externalPump) {
+        vars.states.externalPump = false;
+        vars.parameters.extPumpLastEnableTime = millis();
+
+        Log.sinfoln("EXTPUMP", F("Disabled: use = off"));
+      }
+
+      return;
+    }
+
    if (!vars.states.heating && this->heatingEnabled) {
      this->heatingEnabled = false;
      this->heatingDisabledTime = millis();
@@ -279,11 +325,9 @@ protected:
      this->heatingEnabled = true;
    }
    
-    if (!settings.externalPump.use || !GPIO_IS_VALID(settings.externalPump.gpio)) {
+    if (!settings.externalPump.use) {
      if (vars.states.externalPump) {
-        if (GPIO_IS_VALID(settings.externalPump.gpio)) {
-          digitalWrite(settings.externalPump.gpio, LOW);
-        }
+        digitalWrite(configuredGpio, LOW);

        vars.states.externalPump = false;
        vars.parameters.extPumpLastEnableTime = millis();
@@ -296,7 +340,7 @@ protected:

    if (vars.states.externalPump && !this->heatingEnabled) {
      if (this->extPumpStartReason == MainTask::PumpStartReason::HEATING && millis() - this->heatingDisabledTime > (settings.externalPump.postCirculationTime * 1000u)) {
-        digitalWrite(settings.externalPump.gpio, LOW);
+        digitalWrite(configuredGpio, LOW);

        vars.states.externalPump = false;
        vars.parameters.extPumpLastEnableTime = millis();
@@ -304,7 +348,7 @@ protected:
        Log.sinfoln("EXTPUMP", F("Disabled: expired post circulation time"));

      } else if (this->extPumpStartReason == MainTask::PumpStartReason::ANTISTUCK && millis() - this->externalPumpStartTime >= (settings.externalPump.antiStuckTime * 1000u)) {
-        digitalWrite(settings.externalPump.gpio, LOW);
+        digitalWrite(configuredGpio, LOW);

        vars.states.externalPump = false;
        vars.parameters.extPumpLastEnableTime = millis();
@@ -320,7 +364,7 @@ protected:
      this->externalPumpStartTime = millis();
      this->extPumpStartReason = MainTask::PumpStartReason::HEATING;

-      digitalWrite(settings.externalPump.gpio, HIGH);
+      digitalWrite(configuredGpio, HIGH);

      Log.sinfoln("EXTPUMP", F("Enabled: heating on"));

@@ -329,7 +373,7 @@ protected:
      this->externalPumpStartTime = millis();
      this->extPumpStartReason = MainTask::PumpStartReason::ANTISTUCK;

-      digitalWrite(settings.externalPump.gpio, HIGH);
+      digitalWrite(configuredGpio, HIGH);

      Log.sinfoln("EXTPUMP", F("Enabled: anti stuck"));
    }
--- a/src/MqttTask.h
+++ b/src/MqttTask.h
@@ -20,6 +20,11 @@ public:
    if (this->client != nullptr) {
      if (this->client->connected()) {
        this->client->stop();
+
+        if (this->connected) {
+          this->onDisconnect();
+          this->connected = false;
+        }
      }

      delete this->client;
@@ -31,6 +36,12 @@ public:

  void disable() {
    this->client->stop();
+
+    if (this->connected) {
+      this->onDisconnect();
+      this->connected = false;
+    }
+    
    Task::disable();

    Log.sinfoln(FPSTR(L_MQTT), F("Disabled"));
@@ -51,6 +62,7 @@ protected:
  MqttClient* client = nullptr;
  HaHelper* haHelper = nullptr;
  MqttWriter* writer = nullptr;
+  UnitSystem currentUnitSystem = UnitSystem::METRIC;
  unsigned short readyForSendTime = 15000;
  unsigned long lastReconnectTime = 0;
  unsigned long connectedTime = 0;
@@ -175,13 +187,15 @@ protected:
      this->onConnect();
    }

-    if (!this->connected && settings.emergency.enable && !vars.states.emergency && millis() - this->disconnectedTime > EMERGENCY_TIME_TRESHOLD) {
-      vars.states.emergency = true;
-      Log.sinfoln(FPSTR(L_MQTT), F("Emergency mode enabled"));
+    if (settings.emergency.enable && settings.emergency.onMqttFault) {
+      if (!this->connected && !vars.states.emergency && millis() - this->disconnectedTime > (settings.emergency.tresholdTime * 1000)) {
+        vars.states.emergency = true;
+        Log.sinfoln(FPSTR(L_MQTT), F("Emergency mode enabled"));

-    } else if (this->connected && vars.states.emergency && millis() - this->connectedTime > 10000) {
-      vars.states.emergency = false;
-      Log.sinfoln(FPSTR(L_MQTT), F("Emergency mode disabled"));
+      } else if (this->connected && vars.states.emergency && millis() - this->connectedTime > 10000) {
+        vars.states.emergency = false;
+        Log.sinfoln(FPSTR(L_MQTT), F("Emergency mode disabled"));
+      }
    }

    if (!this->connected) {
@@ -213,10 +227,11 @@ protected:
    }

    // publish ha entities if not published
-    if (this->newConnection) {
+    if (this->newConnection || this->currentUnitSystem != settings.system.unitSystem) {
      this->publishHaEntities();
      this->publishNonStaticHaEntities(true);
      this->newConnection = false;
+      this->currentUnitSystem = settings.system.unitSystem;

    } else {
      // publish non static ha entities
@@ -318,19 +333,19 @@ protected:
  void publishHaEntities() {
    // emergency
    this->haHelper->publishSwitchEmergency();
-    this->haHelper->publishNumberEmergencyTarget();
+    this->haHelper->publishNumberEmergencyTarget(settings.system.unitSystem);
    this->haHelper->publishSwitchEmergencyUseEquitherm();
    this->haHelper->publishSwitchEmergencyUsePid();

    // heating
    this->haHelper->publishSwitchHeating(false);
    this->haHelper->publishSwitchHeatingTurbo();
-    this->haHelper->publishNumberHeatingHysteresis();
-    this->haHelper->publishSensorHeatingSetpoint(false);
-    this->haHelper->publishSensorBoilerHeatingMinTemp(false);
-    this->haHelper->publishSensorBoilerHeatingMaxTemp(false);
-    this->haHelper->publishNumberHeatingMinTemp(false);
-    this->haHelper->publishNumberHeatingMaxTemp(false);
+    this->haHelper->publishNumberHeatingHysteresis(settings.system.unitSystem);
+    this->haHelper->publishSensorHeatingSetpoint(settings.system.unitSystem, false);
+    this->haHelper->publishSensorBoilerHeatingMinTemp(settings.system.unitSystem, false);
+    this->haHelper->publishSensorBoilerHeatingMaxTemp(settings.system.unitSystem, false);
+    this->haHelper->publishNumberHeatingMinTemp(settings.system.unitSystem, false);
+    this->haHelper->publishNumberHeatingMaxTemp(settings.system.unitSystem, false);
    this->haHelper->publishNumberHeatingMaxModulation(false);

    // pid
@@ -339,8 +354,8 @@ protected:
    this->haHelper->publishNumberPidFactorI();
    this->haHelper->publishNumberPidFactorD();
    this->haHelper->publishNumberPidDt(false);
-    this->haHelper->publishNumberPidMinTemp(false);
-    this->haHelper->publishNumberPidMaxTemp(false);
+    this->haHelper->publishNumberPidMinTemp(settings.system.unitSystem, false);
+    this->haHelper->publishNumberPidMaxTemp(settings.system.unitSystem, false);

    // equitherm
    this->haHelper->publishSwitchEquitherm();
@@ -362,14 +377,16 @@ protected:

    // sensors
    this->haHelper->publishSensorModulation(false);
-    this->haHelper->publishSensorPressure(false);
+    this->haHelper->publishSensorPressure(settings.system.unitSystem, false);
    this->haHelper->publishSensorFaultCode();
    this->haHelper->publishSensorRssi(false);
    this->haHelper->publishSensorUptime(false);

    // temperatures
-    this->haHelper->publishNumberIndoorTemp();
-    this->haHelper->publishSensorHeatingTemp();
+    this->haHelper->publishNumberIndoorTemp(settings.system.unitSystem);
+    this->haHelper->publishSensorHeatingTemp(settings.system.unitSystem);
+    this->haHelper->publishSensorHeatingReturnTemp(settings.system.unitSystem, false);
+    this->haHelper->publishSensorExhaustTemp(settings.system.unitSystem, false);

    // buttons
    this->haHelper->publishButtonRestart(false);
@@ -383,23 +400,36 @@ protected:

    bool published = false;
    bool isStupidMode = !settings.pid.enable && !settings.equitherm.enable;
-    byte heatingMinTemp = isStupidMode ? settings.heating.minTemp : 10;
-    byte heatingMaxTemp = isStupidMode ? settings.heating.maxTemp : 30;
+    byte heatingMinTemp = 0;
+    byte heatingMaxTemp = 0;
    bool editableOutdoorTemp = settings.sensors.outdoor.type == SensorType::MANUAL;
    bool editableIndoorTemp = settings.sensors.indoor.type == SensorType::MANUAL;

+    if (isStupidMode) {
+      heatingMinTemp = settings.heating.minTemp;
+      heatingMaxTemp = settings.heating.maxTemp;
+
+    } else if (settings.system.unitSystem == UnitSystem::METRIC) {
+      heatingMinTemp = 5;
+      heatingMaxTemp = 30;
+
+    } else if (settings.system.unitSystem == UnitSystem::IMPERIAL) {
+      heatingMinTemp = 41;
+      heatingMaxTemp = 86;
+    }
+
    if (force || _dhwPresent != settings.opentherm.dhwPresent) {
      _dhwPresent = settings.opentherm.dhwPresent;

      if (_dhwPresent) {
        this->haHelper->publishSwitchDhw(false);
-        this->haHelper->publishSensorBoilerDhwMinTemp(false);
-        this->haHelper->publishSensorBoilerDhwMaxTemp(false);
-        this->haHelper->publishNumberDhwMinTemp(false);
-        this->haHelper->publishNumberDhwMaxTemp(false);
+        this->haHelper->publishSensorBoilerDhwMinTemp(settings.system.unitSystem, false);
+        this->haHelper->publishSensorBoilerDhwMaxTemp(settings.system.unitSystem, false);
+        this->haHelper->publishNumberDhwMinTemp(settings.system.unitSystem, false);
+        this->haHelper->publishNumberDhwMaxTemp(settings.system.unitSystem, false);
        this->haHelper->publishBinSensorDhw();
-        this->haHelper->publishSensorDhwTemp();
-        this->haHelper->publishSensorDhwFlowRate(false);
+        this->haHelper->publishSensorDhwTemp(settings.system.unitSystem);
+        this->haHelper->publishSensorDhwFlowRate(settings.system.unitSystem, false);

      } else {
        this->haHelper->deleteSwitchDhw();
@@ -426,8 +456,9 @@ protected:
      _heatingMaxTemp = heatingMaxTemp;
      _isStupidMode = isStupidMode;

-      this->haHelper->publishNumberHeatingTarget(heatingMinTemp, heatingMaxTemp, false);
+      this->haHelper->publishNumberHeatingTarget(settings.system.unitSystem, heatingMinTemp, heatingMaxTemp, false);
      this->haHelper->publishClimateHeating(
+        settings.system.unitSystem,
        heatingMinTemp,
        heatingMaxTemp,
        isStupidMode ? HaHelper::TEMP_SOURCE_HEATING : HaHelper::TEMP_SOURCE_INDOOR
@@ -438,6 +469,7 @@ protected:
    } else if (_isStupidMode != isStupidMode) {
      _isStupidMode = isStupidMode;
      this->haHelper->publishClimateHeating(
+        settings.system.unitSystem,
        heatingMinTemp,
        heatingMaxTemp,
        isStupidMode ? HaHelper::TEMP_SOURCE_HEATING : HaHelper::TEMP_SOURCE_INDOOR
@@ -450,8 +482,8 @@ protected:
      _dhwMinTemp = settings.dhw.minTemp;
      _dhwMaxTemp = settings.dhw.maxTemp;

-      this->haHelper->publishNumberDhwTarget(settings.dhw.minTemp, settings.dhw.maxTemp, false);
-      this->haHelper->publishClimateDhw(settings.dhw.minTemp, settings.dhw.maxTemp);
+      this->haHelper->publishNumberDhwTarget(settings.system.unitSystem, settings.dhw.minTemp, settings.dhw.maxTemp, false);
+      this->haHelper->publishClimateDhw(settings.system.unitSystem, settings.dhw.minTemp, settings.dhw.maxTemp);

      published = true;
    }
@@ -461,10 +493,10 @@ protected:

      if (editableOutdoorTemp) {
        this->haHelper->deleteSensorOutdoorTemp();
-        this->haHelper->publishNumberOutdoorTemp();
+        this->haHelper->publishNumberOutdoorTemp(settings.system.unitSystem);
      } else {
        this->haHelper->deleteNumberOutdoorTemp();
-        this->haHelper->publishSensorOutdoorTemp();
+        this->haHelper->publishSensorOutdoorTemp(settings.system.unitSystem);
      }

      published = true;
@@ -475,10 +507,10 @@ protected:

      if (editableIndoorTemp) {
        this->haHelper->deleteSensorIndoorTemp();
-        this->haHelper->publishNumberIndoorTemp();
+        this->haHelper->publishNumberIndoorTemp(settings.system.unitSystem);
      } else {
        this->haHelper->deleteNumberIndoorTemp();
-        this->haHelper->publishSensorIndoorTemp();
+        this->haHelper->publishSensorIndoorTemp(settings.system.unitSystem);
      }

      published = true;
--- a/src/OpenThermTask.h
+++ b/src/OpenThermTask.h
@@ -29,6 +29,7 @@ protected:
  unsigned long prevUpdateNonEssentialVars = 0;
  unsigned long dhwSetTempTime = 0;
  unsigned long heatingSetTempTime = 0;
+  byte configuredRxLedGpio = GPIO_IS_NOT_CONFIGURED;


  const char* getTaskName() {
@@ -44,10 +45,12 @@ protected:
  }

  void setup() {
-    #ifdef LED_OT_RX_GPIO
-      pinMode(LED_OT_RX_GPIO, OUTPUT);
-      digitalWrite(LED_OT_RX_GPIO, LOW);
-    #endif
+    if (settings.system.unitSystem != UnitSystem::METRIC) {
+      vars.parameters.heatingMinTemp = convertTemp(vars.parameters.heatingMinTemp, UnitSystem::METRIC, settings.system.unitSystem);
+      vars.parameters.heatingMaxTemp = convertTemp(vars.parameters.heatingMaxTemp, UnitSystem::METRIC, settings.system.unitSystem);
+      vars.parameters.dhwMinTemp = convertTemp(vars.parameters.dhwMinTemp, UnitSystem::METRIC, settings.system.unitSystem);
+      vars.parameters.dhwMaxTemp = convertTemp(vars.parameters.dhwMaxTemp, UnitSystem::METRIC, settings.system.unitSystem);
+    }

    // delete instance
    if (this->instance != nullptr) {
@@ -82,13 +85,11 @@ protected:
      if (status == OpenThermResponseStatus::SUCCESS) {
        this->lastSuccessResponse = millis();

-        #ifdef LED_OT_RX_GPIO
-        {
-          digitalWrite(LED_OT_RX_GPIO, HIGH);
+        if (this->configuredRxLedGpio != GPIO_IS_NOT_CONFIGURED) {
+          digitalWrite(this->configuredRxLedGpio, HIGH);
          delayMicroseconds(2000);
-          digitalWrite(LED_OT_RX_GPIO, LOW);
+          digitalWrite(this->configuredRxLedGpio, LOW);
        }
-        #endif
      }
    });

@@ -114,6 +115,21 @@ protected:
      return;
    }

+    if (settings.opentherm.rxLedGpio != this->configuredRxLedGpio) {
+      if (this->configuredRxLedGpio != GPIO_IS_NOT_CONFIGURED) {
+        digitalWrite(this->configuredRxLedGpio, LOW);
+      }
+      
+      if (GPIO_IS_VALID(settings.opentherm.rxLedGpio)) {
+        this->configuredRxLedGpio = settings.opentherm.rxLedGpio;
+        pinMode(this->configuredRxLedGpio, OUTPUT);
+        digitalWrite(this->configuredRxLedGpio, LOW);
+
+      } else if (this->configuredRxLedGpio != GPIO_IS_NOT_CONFIGURED) {
+        this->configuredRxLedGpio = GPIO_IS_NOT_CONFIGURED;
+      }
+    }
+
    bool heatingEnabled = (vars.states.emergency || settings.heating.enable) && this->pump && this->isReady();
    bool heatingCh2Enabled = settings.opentherm.heatingCh2Enabled;
    if (settings.opentherm.heatingCh1ToCh2) {
@@ -203,7 +219,7 @@ protected:


      // Get DHW min/max temp (if necessary)
-      if (settings.opentherm.dhwPresent) {
+      if (settings.opentherm.dhwPresent && settings.opentherm.getMinMaxTemp) {
        if (updateMinMaxDhwTemp()) {
          if (settings.dhw.minTemp < vars.parameters.dhwMinTemp) {
            settings.dhw.minTemp = vars.parameters.dhwMinTemp;
@@ -218,44 +234,49 @@ protected:
          }

        } else {
+          vars.parameters.dhwMinTemp = convertTemp(DEFAULT_DHW_MIN_TEMP, UnitSystem::METRIC, settings.system.unitSystem);
+          vars.parameters.dhwMaxTemp = convertTemp(DEFAULT_DHW_MAX_TEMP, UnitSystem::METRIC, settings.system.unitSystem);
+
          Log.swarningln(FPSTR(L_OT_DHW), F("Failed get min/max temp"));
        }

        if (settings.dhw.minTemp >= settings.dhw.maxTemp) {
-          settings.dhw.minTemp = 30;
-          settings.dhw.maxTemp = 60;
+          settings.dhw.minTemp = vars.parameters.dhwMinTemp;
+          settings.dhw.maxTemp = vars.parameters.dhwMaxTemp;
          fsSettings.update();
        }
      }


      // Get heating min/max temp
-      if (updateMinMaxHeatingTemp()) {
-        if (settings.heating.minTemp < vars.parameters.heatingMinTemp) {
-          settings.heating.minTemp = vars.parameters.heatingMinTemp;
-          fsSettings.update();
-          Log.snoticeln(FPSTR(L_OT_HEATING), F("Updated min temp: %hhu"), settings.heating.minTemp);
-        }
+      if (settings.opentherm.getMinMaxTemp) {
+        if (updateMinMaxHeatingTemp()) {
+          if (settings.heating.minTemp < vars.parameters.heatingMinTemp) {
+            settings.heating.minTemp = vars.parameters.heatingMinTemp;
+            fsSettings.update();
+            Log.snoticeln(FPSTR(L_OT_HEATING), F("Updated min temp: %hhu"), settings.heating.minTemp);
+          }

-        if (settings.heating.maxTemp > vars.parameters.heatingMaxTemp) {
-          settings.heating.maxTemp = vars.parameters.heatingMaxTemp;
-          fsSettings.update();
-          Log.snoticeln(FPSTR(L_OT_HEATING), F("Updated max temp: %hhu"), settings.heating.maxTemp);
-        }
+          if (settings.heating.maxTemp > vars.parameters.heatingMaxTemp) {
+            settings.heating.maxTemp = vars.parameters.heatingMaxTemp;
+            fsSettings.update();
+            Log.snoticeln(FPSTR(L_OT_HEATING), F("Updated max temp: %hhu"), settings.heating.maxTemp);
+          }
+          
+        } else {
+          vars.parameters.heatingMinTemp = convertTemp(DEFAULT_HEATING_MIN_TEMP, UnitSystem::METRIC, settings.system.unitSystem);
+          vars.parameters.heatingMaxTemp = convertTemp(DEFAULT_HEATING_MAX_TEMP, UnitSystem::METRIC, settings.system.unitSystem);

-      } else {
-        Log.swarningln(FPSTR(L_OT_HEATING), F("Failed get min/max temp"));
+          Log.swarningln(FPSTR(L_OT_HEATING), F("Failed get min/max temp"));
+        }
      }

      if (settings.heating.minTemp >= settings.heating.maxTemp) {
-        settings.heating.minTemp = 20;
-        settings.heating.maxTemp = 90;
+        settings.heating.minTemp = vars.parameters.heatingMinTemp;
+        settings.heating.maxTemp = vars.parameters.heatingMaxTemp;
        fsSettings.update();
      }

-      // Force set max heating temp
-      setMaxHeatingTemp(settings.heating.maxTemp);
-
      // Get outdoor temp (if necessary)
      if (settings.sensors.outdoor.type == SensorType::BOILER) {
        updateOutsideTemp();
@@ -273,7 +294,7 @@ protected:


    // Get current modulation level (if necessary)
-    if ((settings.opentherm.dhwPresent && settings.dhw.enable) || settings.heating.enable || heatingEnabled) {
+    if (vars.states.flame) {
      updateModulationLevel();

    } else {
@@ -293,6 +314,12 @@ protected:
    // Get current heating temp
    updateHeatingTemp();

+    // Get heating return temp
+    updateHeatingReturnTemp();
+
+    // Get exhaust temp
+    updateExhaustTemp();
+

    // Fault reset action
    if (vars.actions.resetFault) {
@@ -325,15 +352,16 @@ protected:

    // Update DHW temp
    byte newDhwTemp = settings.dhw.target;
-    if (settings.opentherm.dhwPresent && settings.dhw.enable && (needSetDhwTemp() || newDhwTemp != currentDhwTemp)) {
+    if (settings.opentherm.dhwPresent && settings.dhw.enable && (this->needSetDhwTemp() || newDhwTemp != currentDhwTemp)) {
      if (newDhwTemp < settings.dhw.minTemp || newDhwTemp > settings.dhw.maxTemp) {
        newDhwTemp = constrain(newDhwTemp, settings.dhw.minTemp, settings.dhw.maxTemp);
      }

-      Log.sinfoln(FPSTR(L_OT_DHW), F("Set temp = %u"), newDhwTemp);
+      float convertedTemp = convertTemp(newDhwTemp, settings.system.unitSystem, settings.opentherm.unitSystem);
+      Log.sinfoln(FPSTR(L_OT_DHW), F("Set temp: %u (converted: %.2f)"), newDhwTemp, convertedTemp);

      // Set DHW temp
-      if (this->instance->setDhwTemp(newDhwTemp)) {
+      if (this->instance->setDhwTemp(convertedTemp)) {
        currentDhwTemp = newDhwTemp;
        this->dhwSetTempTime = millis();

@@ -343,7 +371,7 @@ protected:

      // Set DHW temp to CH2
      if (settings.opentherm.dhwToCh2) {
-        if (!this->instance->setHeatingCh2Temp(newDhwTemp)) {
+        if (!this->instance->setHeatingCh2Temp(convertedTemp)) {
          Log.swarningln(FPSTR(L_OT_DHW), F("Failed set ch2 temp"));
        }
      }
@@ -351,11 +379,12 @@ protected:


    // Update heating temp
-    if (heatingEnabled && (needSetHeatingTemp() || fabs(vars.parameters.heatingSetpoint - currentHeatingTemp) > 0.0001)) {
-      Log.sinfoln(FPSTR(L_OT_HEATING), F("Set temp = %u"), vars.parameters.heatingSetpoint);
+    if (heatingEnabled && (this->needSetHeatingTemp() || fabs(vars.parameters.heatingSetpoint - currentHeatingTemp) > 0.0001)) {
+      float convertedTemp = convertTemp(vars.parameters.heatingSetpoint, settings.system.unitSystem, settings.opentherm.unitSystem);
+      Log.sinfoln(FPSTR(L_OT_HEATING), F("Set temp: %u (converted: %.2f)"), vars.parameters.heatingSetpoint, convertedTemp);

      // Set heating temp
-      if (this->instance->setHeatingCh1Temp(vars.parameters.heatingSetpoint)) {
+      if (this->instance->setHeatingCh1Temp(convertedTemp) || this->setMaxHeatingTemp(convertedTemp)) {
        currentHeatingTemp = vars.parameters.heatingSetpoint;
        this->heatingSetTempTime = millis();

@@ -365,7 +394,7 @@ protected:

      // Set heating temp to CH2
      if (settings.opentherm.heatingCh1ToCh2) {
-        if (!this->instance->setHeatingCh2Temp(vars.parameters.heatingSetpoint)) {
+        if (!this->instance->setHeatingCh2Temp(convertedTemp)) {
          Log.swarningln(FPSTR(L_OT_HEATING), F("Failed set ch2 temp"));
        }
      }
@@ -390,7 +419,7 @@ protected:

  void initialize() {
    // Not all boilers support these, only try once when the boiler becomes connected
-    if (updateSlaveVersion()) {
+    if (this->updateSlaveVersion()) {
      Log.straceln(FPSTR(L_OT), F("Slave version: %u, type: %u"), vars.parameters.slaveVersion, vars.parameters.slaveType);

    } else {
@@ -398,21 +427,28 @@ protected:
    }

    // 0x013F
-    if (setMasterVersion(0x3F, 0x01)) {
+    if (this->setMasterVersion(0x3F, 0x01)) {
      Log.straceln(FPSTR(L_OT), F("Master version: %u, type: %u"), vars.parameters.masterVersion, vars.parameters.masterType);
      
    } else {
      Log.swarningln(FPSTR(L_OT), F("Set master version failed"));
    }

-    if (updateSlaveConfig()) {
+    if (this->updateSlaveOtVersion()) {
+      Log.straceln(FPSTR(L_OT), F("Slave OT version: %f"), vars.parameters.slaveOtVersion);
+
+    } else {
+      Log.swarningln(FPSTR(L_OT), F("Get slave OT version failed"));
+    }
+
+    if (this->updateSlaveConfig()) {
      Log.straceln(FPSTR(L_OT), F("Slave member id: %u, flags: %u"), vars.parameters.slaveMemberId, vars.parameters.slaveFlags);

    } else {
      Log.swarningln(FPSTR(L_OT), F("Get slave config failed"));
    }

-    if (setMasterConfig(settings.opentherm.memberIdCode & 0xFF, (settings.opentherm.memberIdCode & 0xFFFF) >> 8)) {
+    if (this->setMasterConfig(settings.opentherm.memberIdCode & 0xFF, (settings.opentherm.memberIdCode & 0xFFFF) >> 8)) {
      Log.straceln(FPSTR(L_OT), F("Master member id: %u, flags: %u"), vars.parameters.masterMemberId, vars.parameters.masterFlags);
      
    } else {
@@ -507,14 +543,14 @@ protected:
    unsigned long response = this->instance->sendRequest(CustomOpenTherm::buildRequest(
      OpenThermRequestType::WRITE_DATA,
      OpenThermMessageID::MaxRelModLevelSetting,
-      this->instance->toF88(value)
+      CustomOpenTherm::toFloat(value)
    ));

    if (!CustomOpenTherm::isValidResponse(response)) {
      return false;
    }

-    vars.parameters.maxModulation = this->instance->fromF88(response);
+    vars.parameters.maxModulation = CustomOpenTherm::getFloat(response);
    return true;
  }

@@ -537,14 +573,14 @@ protected:
    unsigned long response = this->instance->sendRequest(CustomOpenTherm::buildRequest(
      OpenThermRequestType::WRITE_DATA,
      OpenThermMessageID::OpenThermVersionMaster,
-      this->instance->toF88(version)
+      CustomOpenTherm::toFloat(version)
    ));

    if (!CustomOpenTherm::isValidResponse(response)) {
      return false;
    }

-    vars.parameters.masterOtVersion = this->instance->fromF88(response);
+    vars.parameters.masterOtVersion = CustomOpenTherm::getFloat(response);

    return true;
  }
@@ -598,8 +634,8 @@ protected:
    byte maxTemp = (response & 0xFFFF) >> 8;

    if (minTemp >= 0 && maxTemp > 0 && maxTemp > minTemp) {
-      vars.parameters.dhwMinTemp = minTemp;
-      vars.parameters.dhwMaxTemp = maxTemp;
+      vars.parameters.dhwMinTemp = convertTemp(minTemp, settings.opentherm.unitSystem, settings.system.unitSystem);
+      vars.parameters.dhwMaxTemp = convertTemp(maxTemp, settings.opentherm.unitSystem, settings.system.unitSystem);

      return true;
    }
@@ -622,8 +658,8 @@ protected:
    byte maxTemp = (response & 0xFFFF) >> 8;

    if (minTemp >= 0 && maxTemp > 0 && maxTemp > minTemp) {
-      vars.parameters.heatingMinTemp = minTemp;
-      vars.parameters.heatingMaxTemp = maxTemp;
+      vars.parameters.heatingMinTemp = convertTemp(minTemp, settings.opentherm.unitSystem, settings.system.unitSystem);
+      vars.parameters.heatingMaxTemp = convertTemp(maxTemp, settings.opentherm.unitSystem, settings.system.unitSystem);
      return true;
    }

@@ -650,8 +686,38 @@ protected:
    if (!CustomOpenTherm::isValidResponse(response)) {
      return false;
    }
+    
+    vars.temperatures.outdoor = settings.sensors.outdoor.offset + convertTemp(
+      CustomOpenTherm::getFloat(response),
+      settings.opentherm.unitSystem,
+      settings.system.unitSystem
+    );
+
+    return true;
+  }
+
+  bool updateExhaustTemp() {
+    unsigned long response = this->instance->sendRequest(CustomOpenTherm::buildRequest(
+      OpenThermRequestType::READ_DATA,
+      OpenThermMessageID::Texhaust,
+      0
+    ));
+
+    if (!CustomOpenTherm::isValidResponse(response)) {
+      return false;
+    }
+
+    float value = (float) CustomOpenTherm::getInt(response);
+    if (!isValidTemp(value, settings.opentherm.unitSystem, -40, 500)) {
+      return false;
+    }
+
+    vars.temperatures.exhaust = convertTemp(
+      value,
+      settings.opentherm.unitSystem,
+      settings.system.unitSystem
+    );

-    vars.temperatures.outdoor = CustomOpenTherm::getFloat(response) + settings.sensors.outdoor.offset;
    return true;
  }

@@ -671,7 +737,32 @@ protected:
      return false;
    }

-    vars.temperatures.heating = value;
+    vars.temperatures.heating = convertTemp(
+      value,
+      settings.opentherm.unitSystem,
+      settings.system.unitSystem
+    );
+
+    return true;
+  }
+
+  bool updateHeatingReturnTemp() {
+    unsigned long response = this->instance->sendRequest(CustomOpenTherm::buildRequest(
+      OpenThermMessageType::READ_DATA,
+      OpenThermMessageID::Tret,
+      0
+    ));
+
+    if (!CustomOpenTherm::isValidResponse(response)) {
+      return false;
+    }
+
+    vars.temperatures.heatingReturn = convertTemp(
+      CustomOpenTherm::getFloat(response),
+      settings.opentherm.unitSystem,
+      settings.system.unitSystem
+    );
+
    return true;
  }

@@ -692,7 +783,12 @@ protected:
      return false;
    }

-    vars.temperatures.dhw = value;
+    vars.temperatures.dhw = convertTemp(
+      value,
+      settings.opentherm.unitSystem,
+      settings.system.unitSystem
+    );
+
    return true;
  }

@@ -706,12 +802,17 @@ protected:
    if (!CustomOpenTherm::isValidResponse(response)) {
      return false;
    }
-    
+
    float value = CustomOpenTherm::getFloat(response);
-    if (value > 16 && this->dhwFlowRateMultiplier != 10) {
+    if (this->dhwFlowRateMultiplier != 10 && value > convertVolume(16, UnitSystem::METRIC, settings.opentherm.unitSystem)) {
      this->dhwFlowRateMultiplier = 10;
    }
-    vars.sensors.dhwFlowRate = this->dhwFlowRateMultiplier == 1 ? value : value / this->dhwFlowRateMultiplier;
+
+    vars.sensors.dhwFlowRate = convertVolume(
+      value / this->dhwFlowRateMultiplier,
+      settings.opentherm.unitSystem,
+      settings.system.unitSystem
+    );
    
    return true;
  }
@@ -742,12 +843,7 @@ protected:
      return false;
    }

-    float modulation = this->instance->fromF88(response);
-    if (!vars.states.flame) {
-      vars.sensors.modulation = 0;
-    } else {
-      vars.sensors.modulation = modulation;
-    }
+    vars.sensors.modulation = CustomOpenTherm::getFloat(response);

    return true;
  }
@@ -764,10 +860,15 @@ protected:
    }

    float value = CustomOpenTherm::getFloat(response);
-    if (value > 5 && this->pressureMultiplier != 10) {
+    if (this->pressureMultiplier != 10 && value > convertPressure(5, UnitSystem::METRIC, settings.opentherm.unitSystem)) {
      this->pressureMultiplier = 10;
    }
-    vars.sensors.pressure = this->pressureMultiplier == 1 ? value : value / this->pressureMultiplier;
+
+    vars.sensors.pressure = convertPressure(
+      value / this->pressureMultiplier,
+      settings.opentherm.unitSystem,
+      settings.system.unitSystem
+    );

    return true;
  }
--- a/src/PortalTask.h
+++ b/src/PortalTask.h
@@ -86,9 +86,21 @@ protected:
    this->webServer->addHandler(indexPage);*/
    this->webServer->addHandler(new StaticPage("/", &LittleFS, "/index.html", PORTAL_CACHE));

+    // dashboard page
+    auto dashboardPage = (new StaticPage("/dashboard.html", &LittleFS, "/dashboard.html", PORTAL_CACHE))
+      ->setBeforeSendCallback([this]() {
+        if (this->isAuthRequired() && !this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
+          this->webServer->requestAuthentication(DIGEST_AUTH);
+          return false;
+        }
+
+        return true;
+      });
+    this->webServer->addHandler(dashboardPage);
+
    // restart
    this->webServer->on("/restart.html", HTTP_GET, [this]() {
-      if (this->isNeedAuth()) {
+      if (this->isAuthRequired()) {
        if (!this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
          this->webServer->send(401);
          return;
@@ -103,7 +115,7 @@ protected:
    // network settings page
    auto networkPage = (new StaticPage("/network.html", &LittleFS, "/network.html", PORTAL_CACHE))
      ->setBeforeSendCallback([this]() {
-        if (this->isNeedAuth() && !this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
+        if (this->isAuthRequired() && !this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
          this->webServer->requestAuthentication(DIGEST_AUTH);
          return false;
        }
@@ -115,7 +127,7 @@ protected:
    // settings page
    auto settingsPage = (new StaticPage("/settings.html", &LittleFS, "/settings.html", PORTAL_CACHE))
      ->setBeforeSendCallback([this]() {
-        if (this->isNeedAuth() && !this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
+        if (this->isAuthRequired() && !this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
          this->webServer->requestAuthentication(DIGEST_AUTH);
          return false;
        }
@@ -127,7 +139,7 @@ protected:
    // upgrade page
    auto upgradePage = (new StaticPage("/upgrade.html", &LittleFS, "/upgrade.html", PORTAL_CACHE))
      ->setBeforeSendCallback([this]() {
-        if (this->isNeedAuth() && !this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
+        if (this->isAuthRequired() && !this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
          this->webServer->requestAuthentication(DIGEST_AUTH);
          return false;
        }
@@ -138,7 +150,7 @@ protected:

    // OTA
    auto upgradeHandler = (new UpgradeHandler("/api/upgrade"))->setCanUploadCallback([this](const String& uri) {
-      if (this->isNeedAuth() && !this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
+      if (this->isAuthRequired() && !this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
        this->webServer->sendHeader("Connection", "close");
        this->webServer->send(401);
        return false;
@@ -172,7 +184,7 @@ protected:

    // backup
    this->webServer->on("/api/backup/save", HTTP_GET, [this]() {
-      if (this->isNeedAuth()) {
+      if (this->isAuthRequired()) {
        if (!this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
          return this->webServer->send(401);
        }
@@ -196,7 +208,7 @@ protected:
    });

    this->webServer->on("/api/backup/restore", HTTP_POST, [this]() {
-      if (this->isNeedAuth()) {
+      if (this->isAuthRequired()) {
        if (!this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
          return this->webServer->send(401);
        }
@@ -253,7 +265,7 @@ protected:

    // network
    this->webServer->on("/api/network/settings", HTTP_GET, [this]() {
-      if (this->isNeedAuth()) {
+      if (this->isAuthRequired()) {
        if (!this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
          return this->webServer->send(401);
        }
@@ -267,7 +279,7 @@ protected:
    });

    this->webServer->on("/api/network/settings", HTTP_POST, [this]() {
-      if (this->isNeedAuth()) {
+      if (this->isAuthRequired()) {
        if (!this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
          return this->webServer->send(401);
        }
@@ -298,8 +310,14 @@ protected:
      doc.clear();
      doc.shrinkToFit();

+      networkSettingsToJson(networkSettings, doc);
+      doc.shrinkToFit();
+      
+      this->bufferedWebServer->send(changed ? 201 : 200, "application/json", doc);
+
      if (changed) {
-        this->webServer->send(201);
+        doc.clear();
+        doc.shrinkToFit();

        fsNetworkSettings.update();
        network->setHostname(networkSettings.hostname)
@@ -312,33 +330,11 @@ protected:
            networkSettings.staticConfig.dns
          )
          ->reconnect();
-
-      } else {
-        this->webServer->send(200);
      }
    });

-    this->webServer->on("/api/network/status", HTTP_GET, [this]() {
-      bool isConnected = network->isConnected();
-
-      JsonDocument doc;
-      doc["hostname"] = networkSettings.hostname;
-      doc["mac"] = network->getStaMac();
-      doc["isConnected"] = isConnected;
-      doc["ssid"] = network->getStaSsid();
-      doc["signalQuality"] = isConnected ? Network::Manager::rssiToSignalQuality(network->getRssi()) : 0;
-      doc["channel"] = isConnected ? network->getStaChannel() : 0;
-      doc["ip"] = isConnected ? network->getStaIp().toString() : "";
-      doc["subnet"] = isConnected ? network->getStaSubnet().toString() : "";
-      doc["gateway"] = isConnected ? network->getStaGateway().toString() : "";
-      doc["dns"] = isConnected ? network->getStaDns().toString() : "";
-      doc.shrinkToFit();
-
-      this->bufferedWebServer->send(200, "application/json", doc);
-    });
-
    this->webServer->on("/api/network/scan", HTTP_GET, [this]() {
-      if (this->isNeedAuth()) {
+      if (this->isAuthRequired()) {
        if (!this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
          this->webServer->send(401);
          return;
@@ -374,7 +370,7 @@ protected:

    // settings
    this->webServer->on("/api/settings", HTTP_GET, [this]() {
-      if (this->isNeedAuth()) {
+      if (this->isAuthRequired()) {
        if (!this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
          return this->webServer->send(401);
        }
@@ -388,7 +384,7 @@ protected:
    });

    this->webServer->on("/api/settings", HTTP_POST, [this]() {
-      if (this->isNeedAuth()) {
+      if (this->isAuthRequired()) {
        if (!this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
          return this->webServer->send(401);
        }
@@ -419,12 +415,15 @@ protected:
      doc.clear();
      doc.shrinkToFit();

-      if (changed) {
-        fsSettings.update();
-        this->webServer->send(201);
+      settingsToJson(settings, doc);
+      doc.shrinkToFit();

-      } else {
-        this->webServer->send(200);
+      this->bufferedWebServer->send(changed ? 201 : 200, "application/json", doc);
+
+      if (changed) {
+        doc.clear();
+        doc.shrinkToFit();
+        fsSettings.update();
      }
    });

@@ -433,24 +432,13 @@ protected:
    this->webServer->on("/api/vars", HTTP_GET, [this]() {
      JsonDocument doc;
      varsToJson(vars, doc);
-
-      doc["system"]["version"] = PROJECT_VERSION;
-      doc["system"]["buildDate"] = __DATE__ " " __TIME__;
-      doc["system"]["uptime"] = millis() / 1000ul;
-      doc["system"]["totalHeap"] = getTotalHeap();
-      doc["system"]["freeHeap"] = getFreeHeap();
-      doc["system"]["minFreeHeap"] = getFreeHeap(true);
-      doc["system"]["maxFreeBlockHeap"] = getMaxFreeBlockHeap();
-      doc["system"]["minMaxFreeBlockHeap"] = getMaxFreeBlockHeap(true);
-      doc["system"]["resetReason"] = getResetReason();
-      doc["system"]["mqttConnected"] = tMqtt->isConnected();
      doc.shrinkToFit();

      this->bufferedWebServer->send(200, "application/json", doc);
    });

    this->webServer->on("/api/vars", HTTP_POST, [this]() {
-      if (this->isNeedAuth()) {
+      if (this->isAuthRequired()) {
        if (!this->webServer->authenticate(settings.portal.login, settings.portal.password)) {
          return this->webServer->send(401);
        }
@@ -481,12 +469,39 @@ protected:
      doc.clear();
      doc.shrinkToFit();

-      if (changed) {
-        this->webServer->send(201);
+      varsToJson(vars, doc);
+      doc.shrinkToFit();
+      
+      this->bufferedWebServer->send(changed ? 201 : 200, "application/json", doc);
+    });

-      } else {
-        this->webServer->send(200);
-      }
+    this->webServer->on("/api/info", HTTP_GET, [this]() {
+      bool isConnected = network->isConnected();
+
+      JsonDocument doc;
+      doc["network"]["hostname"] = networkSettings.hostname;
+      doc["network"]["mac"] = network->getStaMac();
+      doc["network"]["connected"] = isConnected;
+      doc["network"]["ssid"] = network->getStaSsid();
+      doc["network"]["signalQuality"] = isConnected ? Network::Manager::rssiToSignalQuality(network->getRssi()) : 0;
+      doc["network"]["channel"] = isConnected ? network->getStaChannel() : 0;
+      doc["network"]["ip"] = isConnected ? network->getStaIp().toString() : "";
+      doc["network"]["subnet"] = isConnected ? network->getStaSubnet().toString() : "";
+      doc["network"]["gateway"] = isConnected ? network->getStaGateway().toString() : "";
+      doc["network"]["dns"] = isConnected ? network->getStaDns().toString() : "";
+
+      doc["system"]["version"] = PROJECT_VERSION;
+      doc["system"]["buildDate"] = __DATE__ " " __TIME__;
+      doc["system"]["uptime"] = millis() / 1000ul;
+      doc["system"]["totalHeap"] = getTotalHeap();
+      doc["system"]["freeHeap"] = getFreeHeap();
+      doc["system"]["minFreeHeap"] = getFreeHeap(true);
+      doc["system"]["maxFreeBlockHeap"] = getMaxFreeBlockHeap();
+      doc["system"]["minMaxFreeBlockHeap"] = getMaxFreeBlockHeap(true);
+      doc["system"]["resetReason"] = getResetReason();
+      doc.shrinkToFit();
+
+      this->bufferedWebServer->send(200, "application/json", doc);
    });


@@ -559,8 +574,8 @@ protected:
    }
  }

-  bool isNeedAuth() {
-    return !network->isApEnabled() && settings.portal.useAuth && strlen(settings.portal.password);
+  bool isAuthRequired() {
+    return !network->isApEnabled() && settings.portal.auth && strlen(settings.portal.password);
  }

  void onCaptivePortal() {
--- a/src/RegulatorTask.h
+++ b/src/RegulatorTask.h
@@ -69,7 +69,7 @@ protected:
      }
    }

-    // Ограничиваем, если до этого не ограничило
+    // Limits
    if (newTemp < settings.heating.minTemp || newTemp > settings.heating.maxTemp) {
      newTemp = constrain(newTemp, settings.heating.minTemp, settings.heating.maxTemp);
    }
@@ -182,7 +182,6 @@ protected:
    }

    newTemp = round(newTemp);
-    newTemp = constrain(newTemp, 0, 100);
    return newTemp;
  }

@@ -273,16 +272,36 @@ protected:
    }
  }

+  /**
+   * @brief Get the Equitherm Temp
+   * Calculations in degrees C, conversion occurs when using F
+   * 
+   * @param minTemp 
+   * @param maxTemp 
+   * @return float 
+   */
  float getEquithermTemp(int minTemp, int maxTemp) {
+    float targetTemp = vars.states.emergency ? settings.emergency.target : settings.heating.target;
+    float indoorTemp = vars.temperatures.indoor;
+    float outdoorTemp = vars.temperatures.outdoor;
+
+    if (settings.system.unitSystem == UnitSystem::IMPERIAL) {
+      minTemp = f2c(minTemp);
+      maxTemp = f2c(maxTemp);
+      targetTemp = f2c(targetTemp);
+      indoorTemp = f2c(indoorTemp);
+      outdoorTemp = f2c(outdoorTemp);
+    }
+
    if (vars.states.emergency) {
      etRegulator.Kt = 0;
      etRegulator.indoorTemp = 0;
-      etRegulator.outdoorTemp = vars.temperatures.outdoor;
+      etRegulator.outdoorTemp = outdoorTemp;

    } else if (settings.pid.enable) {
      etRegulator.Kt = 0;
-      etRegulator.indoorTemp = round(vars.temperatures.indoor);
-      etRegulator.outdoorTemp = round(vars.temperatures.outdoor);
+      etRegulator.indoorTemp = round(indoorTemp);
+      etRegulator.outdoorTemp = round(outdoorTemp);

    } else {
      if (settings.heating.turbo) {
@@ -290,17 +309,21 @@ protected:
      } else {
        etRegulator.Kt = settings.equitherm.t_factor;
      }
-      etRegulator.indoorTemp = vars.temperatures.indoor;
-      etRegulator.outdoorTemp = vars.temperatures.outdoor;
+      etRegulator.indoorTemp = indoorTemp;
+      etRegulator.outdoorTemp = outdoorTemp;
    }

    etRegulator.setLimits(minTemp, maxTemp);
    etRegulator.Kn = settings.equitherm.n_factor;
-    // etRegulator.Kn = tuneEquithermN(etRegulator.Kn, vars.temperatures.indoor, settings.heating.target, 300, 1800, 0.01, 1);
    etRegulator.Kk = settings.equitherm.k_factor;
-    etRegulator.targetTemp = vars.states.emergency ? settings.emergency.target : settings.heating.target;
+    etRegulator.targetTemp = targetTemp;
+    float result = etRegulator.getResult();

-    return etRegulator.getResult();
+    if (settings.system.unitSystem == UnitSystem::IMPERIAL) {
+      result = c2f(result);
+    }
+
+    return result;
  }

  float getPidTemp(int minTemp, int maxTemp) {
--- a/src/SensorsTask.h
+++ b/src/SensorsTask.h
@@ -32,11 +32,13 @@ protected:
  DallasTemperature* indoorSensor = nullptr;

  bool initOutdoorSensor = false;
+  unsigned long initOutdoorSensorTime = 0;
  unsigned long startOutdoorConversionTime = 0;
  float filteredOutdoorTemp = 0;
  bool emptyOutdoorTemp = true;
  
  bool initIndoorSensor = false;
+  unsigned long initIndoorSensorTime = 0;
  unsigned long startIndoorConversionTime = 0;
  float filteredIndoorTemp = 0;
  bool emptyIndoorTemp = true;
@@ -79,14 +81,34 @@ protected:
    }
    #endif

-    if (outdoorTempUpdated && fabs(vars.temperatures.outdoor - this->filteredOutdoorTemp) > 0.099) {
-      vars.temperatures.outdoor = this->filteredOutdoorTemp + settings.sensors.outdoor.offset;
-      Log.sinfoln(FPSTR(L_SENSORS_OUTDOOR), F("New temp: %f"), vars.temperatures.outdoor);
+    if (outdoorTempUpdated) {
+      float newTemp = settings.sensors.outdoor.offset;
+      if (settings.system.unitSystem == UnitSystem::METRIC) {
+        newTemp += this->filteredOutdoorTemp;
+
+      } else if (settings.system.unitSystem == UnitSystem::IMPERIAL) {
+        newTemp += c2f(this->filteredOutdoorTemp);
+      }
+
+      if (fabs(vars.temperatures.outdoor - newTemp) > 0.099) {
+        vars.temperatures.outdoor = newTemp;
+        Log.sinfoln(FPSTR(L_SENSORS_OUTDOOR), F("New temp: %f"), vars.temperatures.outdoor);
+      }
    }

-    if (indoorTempUpdated && fabs(vars.temperatures.indoor - this->filteredIndoorTemp) > 0.099) {
-      vars.temperatures.indoor = this->filteredIndoorTemp + settings.sensors.indoor.offset;
-      Log.sinfoln(FPSTR(L_SENSORS_INDOOR), F("New temp: %f"), vars.temperatures.indoor);
+    if (indoorTempUpdated) {
+      float newTemp = settings.sensors.indoor.offset;
+      if (settings.system.unitSystem == UnitSystem::METRIC) {
+        newTemp += this->filteredIndoorTemp;
+
+      } else if (settings.system.unitSystem == UnitSystem::IMPERIAL) {
+        newTemp += c2f(this->filteredIndoorTemp);
+      }
+
+      if (fabs(vars.temperatures.indoor - newTemp) > 0.099) {
+        vars.temperatures.indoor = newTemp;
+        Log.sinfoln(FPSTR(L_SENSORS_INDOOR), F("New temp: %f"), vars.temperatures.indoor);
+      }
    }
  }

@@ -209,10 +231,16 @@ protected:

  void outdoorTemperatureSensor() {
    if (!this->initOutdoorSensor) {
+      if (this->initOutdoorSensorTime && millis() - this->initOutdoorSensorTime < EXT_SENSORS_INTERVAL * 10) {
+        return;
+      }
+
      Log.sinfoln(FPSTR(L_SENSORS_OUTDOOR), F("Starting on gpio %hhu..."), settings.sensors.outdoor.gpio);

      this->oneWireOutdoorSensor->begin(settings.sensors.outdoor.gpio);
+      this->oneWireOutdoorSensor->reset();
      this->outdoorSensor->begin();
+      this->initOutdoorSensorTime = millis();

      Log.straceln(
        FPSTR(L_SENSORS_OUTDOOR),
@@ -275,10 +303,16 @@ protected:

  void indoorTemperatureSensor() {
    if (!this->initIndoorSensor) {
+      if (this->initIndoorSensorTime && millis() - this->initIndoorSensorTime < EXT_SENSORS_INTERVAL * 10) {
+        return;
+      }
+      
      Log.sinfoln(FPSTR(L_SENSORS_INDOOR), F("Starting on gpio %hhu..."), settings.sensors.indoor.gpio);

      this->oneWireIndoorSensor->begin(settings.sensors.indoor.gpio);
+      this->oneWireIndoorSensor->reset();
      this->indoorSensor->begin();
+      this->initIndoorSensorTime = millis();

      Log.straceln(
        FPSTR(L_SENSORS_INDOOR),
--- a/src/Settings.h
+++ b/src/Settings.h
@@ -25,19 +25,32 @@ struct NetworkSettings {
 struct Settings {
  struct {
    bool debug = DEBUG_BY_DEFAULT;
-    bool useSerial = USE_SERIAL;
-    bool useTelnet = USE_TELNET;
+
+    struct {
+      bool enable = USE_SERIAL;
+      unsigned int baudrate = 115200;
+    } serial;
+
+    struct {
+      bool enable = USE_TELNET;
+      unsigned short port = 23;
+    } telnet;
+
+    UnitSystem unitSystem = UnitSystem::METRIC;
+    byte statusLedGpio = DEFAULT_STATUS_LED_GPIO;
  } system;

  struct {
-    bool useAuth = false;
+    bool auth = false;
    char login[13] = DEFAULT_PORTAL_LOGIN;
    char password[33] = DEFAULT_PORTAL_PASSWORD;
  } portal;

  struct {
+    UnitSystem unitSystem = UnitSystem::METRIC;
    byte inGpio = DEFAULT_OT_IN_GPIO;
    byte outGpio = DEFAULT_OT_OUT_GPIO;
+    byte rxLedGpio = DEFAULT_OT_RX_LED_GPIO;
    unsigned int memberIdCode = 0;
    bool dhwPresent = true;
    bool summerWinterMode = false;
@@ -46,9 +59,11 @@ struct Settings {
    bool dhwToCh2 = false;
    bool dhwBlocking = false;
    bool modulationSyncWithHeating = false;
+    bool getMinMaxTemp = true;
  } opentherm;

  struct {
+    bool enable = false;
    char server[81] = DEFAULT_MQTT_SERVER;
    unsigned short port = DEFAULT_MQTT_PORT;
    char user[33] = DEFAULT_MQTT_USER;
@@ -60,8 +75,11 @@ struct Settings {
  struct {
    bool enable = true;
    float target = 40.0f;
+    unsigned short tresholdTime = 120;
    bool useEquitherm = false;
    bool usePid = false;
+    bool onNetworkFault = true;
+    bool onMqttFault = true;
  } emergency;

  struct {
@@ -139,6 +157,7 @@ struct Variables {
    bool fault = false;
    bool diagnostic = false;
    bool externalPump = false;
+    bool mqtt = false;
  } states;

  struct {
@@ -153,7 +172,9 @@ struct Variables {
    float indoor = 0.0f;
    float outdoor = 0.0f;
    float heating = 0.0f;
+    float heatingReturn = 0.0f;
    float dhw = 0.0f;
+    float exhaust = 0.0f;
  } temperatures;

  struct {
--- a/src/defines.h
+++ b/src/defines.h
@@ -1,8 +1,7 @@
 #define PROJECT_NAME                "OpenTherm Gateway"
-#define PROJECT_VERSION             "1.4.0-rc.17"
+#define PROJECT_VERSION             "1.4.0-rc.22"
 #define PROJECT_REPO                "https://github.com/Laxilef/OTGateway"

-#define EMERGENCY_TIME_TRESHOLD     120000
 #define MQTT_RECONNECT_INTERVAL     15000

 #define EXT_SENSORS_INTERVAL        5000
@@ -53,6 +52,10 @@
  #define DEBUG_BY_DEFAULT false
 #endif

+#ifndef DEFAULT_STATUS_LED_GPIO
+  #define DEFAULT_STATUS_LED_GPIO GPIO_IS_NOT_CONFIGURED
+#endif
+
 #ifndef DEFAULT_PORTAL_LOGIN
  #define DEFAULT_PORTAL_LOGIN ""
 #endif
@@ -89,6 +92,10 @@
  #define DEFAULT_OT_OUT_GPIO GPIO_IS_NOT_CONFIGURED
 #endif

+#ifndef DEFAULT_OT_RX_LED_GPIO
+  #define DEFAULT_OT_RX_LED_GPIO GPIO_IS_NOT_CONFIGURED
+#endif
+
 #ifndef DEFAULT_SENSOR_OUTDOOR_GPIO
  #define DEFAULT_SENSOR_OUTDOOR_GPIO GPIO_IS_NOT_CONFIGURED
 #endif
@@ -118,4 +125,9 @@ enum class SensorType : byte {
  BLUETOOTH
 };

+enum class UnitSystem : byte {
+  METRIC,
+  IMPERIAL
+};
+
 char buffer[255];
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -59,7 +59,7 @@ void setup() {
    return tm{sec, min, hour};
  });
  
-  Serial.begin(115200);
+  Serial.begin(settings.system.serial.baudrate);
  Log.addStream(&Serial);
  Log.print("\n\n\r");

@@ -109,12 +109,12 @@ void setup() {
  }

  // logs
-  if (!settings.system.useSerial) {
+  if (!settings.system.serial.enable) {
    Log.clearStreams();
    Serial.end();
  }

-  if (settings.system.useTelnet) {
+  if (settings.system.telnet.enable) {
    telnetStream = new ESPTelnetStream;
    telnetStream->setKeepAliveInterval(500);
    Log.addStream(telnetStream);
--- a/src/utils.h
+++ b/src/utils.h
@@ -1,5 +1,66 @@
 #include <Arduino.h>

+inline float liter2gallon(float value) {
+  return value / 4.546091879f;
+}
+
+inline float gallon2liter(float value) {
+  return value * 4.546091879f;
+}
+
+float convertVolume(float value, const UnitSystem unitFrom, const UnitSystem unitTo) {
+  if (unitFrom == UnitSystem::METRIC && unitTo == UnitSystem::IMPERIAL) {
+    value = liter2gallon(value);
+    
+  } else if (unitFrom == UnitSystem::IMPERIAL && unitTo == UnitSystem::METRIC) {
+    value = gallon2liter(value);
+  }
+
+  return value;
+}
+
+inline float bar2psi(float value) {
+  return value * 14.5038f;
+}
+
+inline float psi2bar(float value) {
+  return value / 14.5038f;
+}
+
+float convertPressure(float value, const UnitSystem unitFrom, const UnitSystem unitTo) {
+  if (unitFrom == UnitSystem::METRIC && unitTo == UnitSystem::IMPERIAL) {
+    value = bar2psi(value);
+    
+  } else if (unitFrom == UnitSystem::IMPERIAL && unitTo == UnitSystem::METRIC) {
+    value = psi2bar(value);
+  }
+
+  return value;
+}
+
+inline float c2f(float value) {
+  return (9.0f / 5.0f) * value + 32.0f;
+}
+
+inline float f2c(float value) {
+  return (value - 32.0f) * (5.0f / 9.0f);
+}
+
+float convertTemp(float value, const UnitSystem unitFrom, const UnitSystem unitTo) {
+  if (unitFrom == UnitSystem::METRIC && unitTo == UnitSystem::IMPERIAL) {
+    value = c2f(value);
+    
+  } else if (unitFrom == UnitSystem::IMPERIAL && unitTo == UnitSystem::METRIC) {
+    value = f2c(value);
+  }
+
+  return value;
+}
+
+bool isValidTemp(const float value, UnitSystem unit, const float min = 0.1f, const float max = 99.9f, const UnitSystem minMaxUnit = UnitSystem::METRIC) {
+  return value >= convertTemp(min, minMaxUnit, unit) && value <= convertTemp(max, minMaxUnit, unit);
+}
+
 double roundd(double value, uint8_t decimals = 2) {
  if (decimals == 0) {
    return (int)(value + 0.5);
@@ -13,7 +74,7 @@ double roundd(double value, uint8_t decimals = 2) {
  return (int)(value * multiplier) / multiplier;
 }

-size_t getTotalHeap() {
+inline size_t getTotalHeap() {
  #if defined(ARDUINO_ARCH_ESP32)
  return ESP.getHeapSize();
  #elif defined(ARDUINO_ARCH_ESP8266)
@@ -63,7 +124,7 @@ size_t getMaxFreeBlockHeap(bool getMinValue = false) {
  return getMinValue ? minValue : value;
 }

-uint8_t getHeapFrag() {
+inline uint8_t getHeapFrag() {
  return 100 - getMaxFreeBlockHeap() * 100.0 / getFreeHeap();
 }

@@ -266,15 +327,21 @@ bool jsonToNetworkSettings(const JsonVariantConst src, NetworkSettings& dst) {
 void settingsToJson(const Settings& src, JsonVariant dst, bool safe = false) {
  if (!safe) {
    dst["system"]["debug"] = src.system.debug;
-    dst["system"]["useSerial"] = src.system.useSerial;
-    dst["system"]["useTelnet"] = src.system.useTelnet;
+    dst["system"]["serial"]["enable"] = src.system.serial.enable;
+    dst["system"]["serial"]["baudrate"] = src.system.serial.baudrate;
+    dst["system"]["telnet"]["enable"] = src.system.telnet.enable;
+    dst["system"]["telnet"]["port"] = src.system.telnet.port;
+    dst["system"]["unitSystem"] = static_cast<byte>(src.system.unitSystem);
+    dst["system"]["statusLedGpio"] = src.system.statusLedGpio;

-    dst["portal"]["useAuth"] = src.portal.useAuth;
+    dst["portal"]["auth"] = src.portal.auth;
    dst["portal"]["login"] = src.portal.login;
    dst["portal"]["password"] = src.portal.password;

+    dst["opentherm"]["unitSystem"] = static_cast<byte>(src.opentherm.unitSystem);
    dst["opentherm"]["inGpio"] = src.opentherm.inGpio;
    dst["opentherm"]["outGpio"] = src.opentherm.outGpio;
+    dst["opentherm"]["rxLedGpio"] = src.opentherm.rxLedGpio;
    dst["opentherm"]["memberIdCode"] = src.opentherm.memberIdCode;
    dst["opentherm"]["dhwPresent"] = src.opentherm.dhwPresent;
    dst["opentherm"]["summerWinterMode"] = src.opentherm.summerWinterMode;
@@ -283,7 +350,9 @@ void settingsToJson(const Settings& src, JsonVariant dst, bool safe = false) {
    dst["opentherm"]["dhwToCh2"] = src.opentherm.dhwToCh2;
    dst["opentherm"]["dhwBlocking"] = src.opentherm.dhwBlocking;
    dst["opentherm"]["modulationSyncWithHeating"] = src.opentherm.modulationSyncWithHeating;
+    dst["opentherm"]["getMinMaxTemp"] = src.opentherm.getMinMaxTemp;

+    dst["mqtt"]["enable"] = src.mqtt.enable;
    dst["mqtt"]["server"] = src.mqtt.server;
    dst["mqtt"]["port"] = src.mqtt.port;
    dst["mqtt"]["user"] = src.mqtt.user;
@@ -294,8 +363,11 @@ void settingsToJson(const Settings& src, JsonVariant dst, bool safe = false) {

  dst["emergency"]["enable"] = src.emergency.enable;
  dst["emergency"]["target"] = roundd(src.emergency.target, 2);
+  dst["emergency"]["tresholdTime"] = src.emergency.tresholdTime;
  dst["emergency"]["useEquitherm"] = src.emergency.useEquitherm;
  dst["emergency"]["usePid"] = src.emergency.usePid;
+  dst["emergency"]["onNetworkFault"] = src.emergency.onNetworkFault;
+  dst["emergency"]["onMqttFault"] = src.emergency.onMqttFault;

  dst["heating"]["enable"] = src.heating.enable;
  dst["heating"]["turbo"] = src.heating.turbo;
@@ -367,20 +439,88 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false
      changed = true;
    }

-    if (src["system"]["useSerial"].is<bool>()) {
-      dst.system.useSerial = src["system"]["useSerial"].as<bool>();
+    if (src["system"]["serial"]["enable"].is<bool>()) {
+      dst.system.serial.enable = src["system"]["serial"]["enable"].as<bool>();
      changed = true;
    }

-    if (src["system"]["useTelnet"].is<bool>()) {
-      dst.system.useTelnet = src["system"]["useTelnet"].as<bool>();
+    if (!src["system"]["serial"]["baudrate"].isNull()) {
+      unsigned int value = src["system"]["serial"]["baudrate"].as<unsigned int>();
+
+      if (value == 9600 || value == 19200 || value == 38400 || value == 57600 || value == 74880 || value == 115200) {
+        dst.system.serial.baudrate = value;
+        changed = true;
+      }
+    }
+
+    if (src["system"]["telnet"]["enable"].is<bool>()) {
+      dst.system.telnet.enable = src["system"]["telnet"]["enable"].as<bool>();
      changed = true;
    }

+    if (!src["system"]["telnet"]["port"].isNull()) {
+      unsigned short value = src["system"]["telnet"]["port"].as<unsigned short>();
+
+      if (value > 0 && value <= 65535) {
+        dst.system.telnet.port = value;
+        changed = true;
+      }
+    }
+
+    if (!src["system"]["unitSystem"].isNull()) {
+      byte value = src["system"]["unitSystem"].as<unsigned char>();
+      UnitSystem prevUnitSystem = dst.system.unitSystem;
+
+      switch (value) {
+        case static_cast<byte>(UnitSystem::METRIC):
+          dst.system.unitSystem = UnitSystem::METRIC;
+          changed = true;
+          break;
+
+        case static_cast<byte>(UnitSystem::IMPERIAL):
+          dst.system.unitSystem = UnitSystem::IMPERIAL;
+          changed = true;
+          break;
+
+        default:
+          break;
+      }
+
+      // convert temps
+      if (dst.system.unitSystem != prevUnitSystem) {
+        dst.emergency.target = convertTemp(dst.emergency.target, prevUnitSystem, dst.system.unitSystem);
+        dst.heating.target = convertTemp(dst.heating.target, prevUnitSystem, dst.system.unitSystem);
+        dst.heating.minTemp = convertTemp(dst.heating.minTemp, prevUnitSystem, dst.system.unitSystem);
+        dst.heating.maxTemp = convertTemp(dst.heating.maxTemp, prevUnitSystem, dst.system.unitSystem);
+        dst.dhw.target = convertTemp(dst.dhw.target, prevUnitSystem, dst.system.unitSystem);
+        dst.dhw.minTemp = convertTemp(dst.dhw.minTemp, prevUnitSystem, dst.system.unitSystem);
+        dst.dhw.maxTemp = convertTemp(dst.dhw.maxTemp, prevUnitSystem, dst.system.unitSystem);
+        dst.pid.minTemp = convertTemp(dst.pid.minTemp, prevUnitSystem, dst.system.unitSystem);
+        dst.pid.maxTemp = convertTemp(dst.pid.maxTemp, prevUnitSystem, dst.system.unitSystem);
+      }
+    }
+
+    if (!src["system"]["statusLedGpio"].isNull()) {
+      if (src["system"]["statusLedGpio"].is<JsonString>() && src["system"]["statusLedGpio"].as<JsonString>().size() == 0) {
+        if (dst.system.statusLedGpio != GPIO_IS_NOT_CONFIGURED) {
+          dst.system.statusLedGpio = GPIO_IS_NOT_CONFIGURED;
+          changed = true;
+        }
+        
+      } else {
+        unsigned char value = src["system"]["statusLedGpio"].as<unsigned char>();
+
+        if (value >= 0 && value <= 254) {
+          dst.system.statusLedGpio = value;
+          changed = true;
+        }
+      }
+    }
+

    // portal
-    if (src["portal"]["useAuth"].is<bool>()) {
-      dst.portal.useAuth = src["portal"]["useAuth"].as<bool>();
+    if (src["portal"]["auth"].is<bool>()) {
+      dst.portal.auth = src["portal"]["auth"].as<bool>();
      changed = true;
    }

@@ -404,6 +544,25 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false


    // opentherm
+    if (!src["opentherm"]["unitSystem"].isNull()) {
+      byte value = src["opentherm"]["unitSystem"].as<unsigned char>();
+
+      switch (value) {
+        case static_cast<byte>(UnitSystem::METRIC):
+          dst.opentherm.unitSystem = UnitSystem::METRIC;
+          changed = true;
+          break;
+
+        case static_cast<byte>(UnitSystem::IMPERIAL):
+          dst.opentherm.unitSystem = UnitSystem::IMPERIAL;
+          changed = true;
+          break;
+
+        default:
+          break;
+      }
+    }
+
    if (!src["opentherm"]["inGpio"].isNull()) {
      if (src["opentherm"]["inGpio"].is<JsonString>() && src["opentherm"]["inGpio"].as<JsonString>().size() == 0) {
        if (dst.opentherm.inGpio != GPIO_IS_NOT_CONFIGURED) {
@@ -438,6 +597,23 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false
      }
    }

+    if (!src["opentherm"]["rxLedGpio"].isNull()) {
+      if (src["opentherm"]["rxLedGpio"].is<JsonString>() && src["opentherm"]["rxLedGpio"].as<JsonString>().size() == 0) {
+        if (dst.opentherm.rxLedGpio != GPIO_IS_NOT_CONFIGURED) {
+          dst.opentherm.rxLedGpio = GPIO_IS_NOT_CONFIGURED;
+          changed = true;
+        }
+        
+      } else {
+        unsigned char value = src["opentherm"]["rxLedGpio"].as<unsigned char>();
+
+        if (value >= 0 && value <= 254) {
+          dst.opentherm.rxLedGpio = value;
+          changed = true;
+        }
+      }
+    }
+
    if (!src["opentherm"]["memberIdCode"].isNull()) {
      unsigned int value = src["opentherm"]["memberIdCode"].as<unsigned int>();

@@ -500,8 +676,18 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false
      changed = true;
    }

+    if (src["opentherm"]["getMinMaxTemp"].is<bool>()) {
+      dst.opentherm.getMinMaxTemp = src["opentherm"]["getMinMaxTemp"].as<bool>();
+      changed = true;
+    }
+

    // mqtt
+    if (src["mqtt"]["enable"].is<bool>()) {
+      dst.mqtt.enable = src["mqtt"]["enable"].as<bool>();
+      changed = true;
+    }
+    
    if (!src["mqtt"]["server"].isNull()) {
      String value = src["mqtt"]["server"].as<String>();

@@ -564,14 +750,14 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false
    changed = true;
  }

-  if (!src["emergency"]["target"].isNull()) {
-    double value = src["emergency"]["target"].as<double>();
+    if (!src["emergency"]["tresholdTime"].isNull()) {
+      unsigned short value = src["emergency"]["tresholdTime"].as<unsigned short>();

-    if (value > 0 && value < 100) {
-      dst.emergency.target = roundd(value, 2);
-      changed = true;
+      if (value >= 60 && value <= 1800) {
+        dst.emergency.tresholdTime = value;
+        changed = true;
+      }
    }
-  }

  if (src["emergency"]["useEquitherm"].is<bool>()) {
    if (dst.sensors.outdoor.type != SensorType::MANUAL) {
@@ -603,6 +789,128 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false
    changed = true;
  }

+  if (src["emergency"]["onNetworkFault"].is<bool>()) {
+    dst.emergency.onNetworkFault = src["emergency"]["onNetworkFault"].as<bool>();
+    changed = true;
+  }
+
+  if (src["emergency"]["onMqttFault"].is<bool>()) {
+    dst.emergency.onMqttFault = src["emergency"]["onMqttFault"].as<bool>();
+    changed = true;
+  }
+
+  if (!src["emergency"]["target"].isNull()) {
+    double value = src["emergency"]["target"].as<double>();
+    bool noRegulators = (!dst.emergency.useEquitherm && !dst.emergency.usePid);
+    bool valid = isValidTemp(
+      value,
+      dst.system.unitSystem,
+      noRegulators ? dst.heating.minTemp : 5,
+      noRegulators ? dst.heating.maxTemp : 30,
+      noRegulators ? dst.system.unitSystem : UnitSystem::METRIC
+    );
+
+    if (valid) {
+      dst.emergency.target = roundd(value, 2);
+      changed = true;
+    }
+  }
+
+
+  // pid
+  if (src["pid"]["enable"].is<bool>()) {
+    dst.pid.enable = src["pid"]["enable"].as<bool>();
+    changed = true;
+  }
+
+  if (!src["pid"]["p_factor"].isNull()) {
+    double value = src["pid"]["p_factor"].as<double>();
+
+    if (value > 0 && value <= 1000) {
+      dst.pid.p_factor = roundd(value, 3);
+      changed = true;
+    }
+  }
+
+  if (!src["pid"]["i_factor"].isNull()) {
+    double value = src["pid"]["i_factor"].as<double>();
+
+    if (value >= 0 && value <= 100) {
+      dst.pid.i_factor = roundd(value, 3);
+      changed = true;
+    }
+  }
+
+  if (!src["pid"]["d_factor"].isNull()) {
+    double value = src["pid"]["d_factor"].as<double>();
+
+    if (value >= 0 && value <= 100000) {
+      dst.pid.d_factor = roundd(value, 1);
+      changed = true;
+    }
+  }
+
+  if (!src["pid"]["dt"].isNull()) {
+    unsigned short value = src["pid"]["dt"].as<unsigned short>();
+
+    if (value >= 30 && value <= 600) {
+      dst.pid.dt = value;
+      changed = true;
+    }
+  }
+
+  if (!src["pid"]["maxTemp"].isNull()) {
+    unsigned char value = src["pid"]["maxTemp"].as<unsigned char>();
+
+    if (isValidTemp(value, dst.system.unitSystem) && value > dst.pid.minTemp) {
+      dst.pid.maxTemp = value;
+      changed = true;
+    }
+  }
+
+  if (!src["pid"]["minTemp"].isNull()) {
+    unsigned char value = src["pid"]["minTemp"].as<unsigned char>();
+
+    if (isValidTemp(value, dst.system.unitSystem) && value < dst.pid.maxTemp) {
+      dst.pid.minTemp = value;
+      changed = true;
+    }
+  }
+
+
+  // equitherm
+  if (src["equitherm"]["enable"].is<bool>()) {
+    dst.equitherm.enable = src["equitherm"]["enable"].as<bool>();
+    changed = true;
+  }
+
+  if (!src["equitherm"]["n_factor"].isNull()) {
+    double value = src["equitherm"]["n_factor"].as<double>();
+
+    if (value > 0 && value <= 10) {
+      dst.equitherm.n_factor = roundd(value, 3);
+      changed = true;
+    }
+  }
+
+  if (!src["equitherm"]["k_factor"].isNull()) {
+    double value = src["equitherm"]["k_factor"].as<double>();
+
+    if (value >= 0 && value <= 10) {
+      dst.equitherm.k_factor = roundd(value, 3);
+      changed = true;
+    }
+  }
+
+  if (!src["equitherm"]["t_factor"].isNull()) {
+    double value = src["equitherm"]["t_factor"].as<double>();
+
+    if (value >= 0 && value <= 10) {
+      dst.equitherm.t_factor = roundd(value, 3);
+      changed = true;
+    }
+  }
+

  // heating
  if (src["heating"]["enable"].is<bool>()) {
@@ -617,8 +925,16 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false

  if (!src["heating"]["target"].isNull()) {
    double value = src["heating"]["target"].as<double>();
+    bool noRegulators = (!dst.equitherm.enable && !dst.pid.enable);
+    bool valid = isValidTemp(
+      value,
+      dst.system.unitSystem,
+      noRegulators ? dst.heating.minTemp : 5,
+      noRegulators ? dst.heating.maxTemp : 30,
+      noRegulators ? dst.system.unitSystem : UnitSystem::METRIC
+    );

-    if (value > 0 && value < 100) {
+    if (valid) {
      dst.heating.target = roundd(value, 2);
      changed = true;
    }
@@ -670,7 +986,7 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false
  if (!src["dhw"]["target"].isNull()) {
    unsigned char value = src["dhw"]["target"].as<unsigned char>();

-    if (value >= 0 && value < 100) {
+    if (isValidTemp(value, dst.system.unitSystem, dst.dhw.minTemp, dst.dhw.maxTemp, dst.system.unitSystem)) {
      dst.dhw.target = value;
      changed = true;
    }
@@ -695,101 +1011,6 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false
  }


-  // pid
-  if (src["pid"]["enable"].is<bool>()) {
-    dst.pid.enable = src["pid"]["enable"].as<bool>();
-    changed = true;
-  }
-
-  if (!src["pid"]["p_factor"].isNull()) {
-    double value = src["pid"]["p_factor"].as<double>();
-
-    if (value > 0 && value <= 1000) {
-      dst.pid.p_factor = roundd(value, 3);
-      changed = true;
-    }
-  }
-
-  if (!src["pid"]["i_factor"].isNull()) {
-    double value = src["pid"]["i_factor"].as<double>();
-
-    if (value >= 0 && value <= 100) {
-      dst.pid.i_factor = roundd(value, 3);
-      changed = true;
-    }
-  }
-
-  if (!src["pid"]["d_factor"].isNull()) {
-    double value = src["pid"]["d_factor"].as<double>();
-
-    if (value >= 0 && value <= 100000) {
-      dst.pid.d_factor = roundd(value, 1);
-      changed = true;
-    }
-  }
-
-  if (!src["pid"]["dt"].isNull()) {
-    unsigned short value = src["pid"]["dt"].as<unsigned short>();
-
-    if (value >= 30 && value <= 600) {
-      dst.pid.dt = value;
-      changed = true;
-    }
-  }
-
-  if (!src["pid"]["maxTemp"].isNull()) {
-    unsigned char value = src["pid"]["maxTemp"].as<unsigned char>();
-
-    if (value > 0 && value <= 100 && value > dst.pid.minTemp) {
-      dst.pid.maxTemp = value;
-      changed = true;
-    }
-  }
-
-  if (!src["pid"]["minTemp"].isNull()) {
-    unsigned char value = src["pid"]["minTemp"].as<unsigned char>();
-
-    if (value >= 0 && value < 100 && value < dst.pid.maxTemp) {
-      dst.pid.minTemp = value;
-      changed = true;
-    }
-  }
-
-
-  // equitherm
-  if (src["equitherm"]["enable"].is<bool>()) {
-    dst.equitherm.enable = src["equitherm"]["enable"].as<bool>();
-    changed = true;
-  }
-
-  if (!src["equitherm"]["n_factor"].isNull()) {
-    double value = src["equitherm"]["n_factor"].as<double>();
-
-    if (value > 0 && value <= 10) {
-      dst.equitherm.n_factor = roundd(value, 3);
-      changed = true;
-    }
-  }
-
-  if (!src["equitherm"]["k_factor"].isNull()) {
-    double value = src["equitherm"]["k_factor"].as<double>();
-
-    if (value >= 0 && value <= 10) {
-      dst.equitherm.k_factor = roundd(value, 3);
-      changed = true;
-    }
-  }
-
-  if (!src["equitherm"]["t_factor"].isNull()) {
-    double value = src["equitherm"]["t_factor"].as<double>();
-
-    if (value >= 0 && value <= 10) {
-      dst.equitherm.t_factor = roundd(value, 3);
-      changed = true;
-    }
-  }
-
-
  // sensors
  if (!src["sensors"]["outdoor"]["type"].isNull()) {
    byte value = src["sensors"]["outdoor"]["type"].as<unsigned char>();
@@ -845,7 +1066,6 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false
  if (!src["sensors"]["indoor"]["type"].isNull()) {
    byte value = src["sensors"]["indoor"]["type"].as<unsigned char>();

-
    switch (value) {
      case static_cast<byte>(SensorType::BOILER):
        dst.sensors.indoor.type = SensorType::BOILER;
@@ -854,7 +1074,7 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false

      case static_cast<byte>(SensorType::MANUAL):
        dst.sensors.indoor.type = SensorType::MANUAL;
-        dst.emergency.useEquitherm = false;
+        dst.emergency.usePid = false;
        changed = true;
        break;

@@ -987,10 +1207,11 @@ void varsToJson(const Variables& src, JsonVariant dst) {
  dst["states"]["fault"] = src.states.fault;
  dst["states"]["diagnostic"] = src.states.diagnostic;
  dst["states"]["externalPump"] = src.states.externalPump;
+  dst["states"]["mqtt"] = src.states.mqtt;

  dst["sensors"]["modulation"] = roundd(src.sensors.modulation, 2);
  dst["sensors"]["pressure"] = roundd(src.sensors.pressure, 2);
-  dst["sensors"]["dhwFlowRate"] = src.sensors.dhwFlowRate;
+  dst["sensors"]["dhwFlowRate"] = roundd(src.sensors.dhwFlowRate, 2);
  dst["sensors"]["faultCode"] = src.sensors.faultCode;
  dst["sensors"]["rssi"] = src.sensors.rssi;
  dst["sensors"]["uptime"] = millis() / 1000ul;
@@ -998,7 +1219,9 @@ void varsToJson(const Variables& src, JsonVariant dst) {
  dst["temperatures"]["indoor"] = roundd(src.temperatures.indoor, 2);
  dst["temperatures"]["outdoor"] = roundd(src.temperatures.outdoor, 2);
  dst["temperatures"]["heating"] = roundd(src.temperatures.heating, 2);
+  dst["temperatures"]["heatingReturn"] = roundd(src.temperatures.heatingReturn, 2);
  dst["temperatures"]["dhw"] = roundd(src.temperatures.dhw, 2);
+  dst["temperatures"]["exhaust"] = roundd(src.temperatures.exhaust, 2);

  dst["parameters"]["heatingEnabled"] = src.parameters.heatingEnabled;
  dst["parameters"]["heatingMinTemp"] = src.parameters.heatingMinTemp;
@@ -1006,6 +1229,12 @@ void varsToJson(const Variables& src, JsonVariant dst) {
  dst["parameters"]["heatingSetpoint"] = src.parameters.heatingSetpoint;
  dst["parameters"]["dhwMinTemp"] = src.parameters.dhwMinTemp;
  dst["parameters"]["dhwMaxTemp"] = src.parameters.dhwMaxTemp;
+
+  dst["parameters"]["slaveMemberId"] = src.parameters.slaveMemberId;
+  dst["parameters"]["slaveFlags"] = src.parameters.slaveFlags;
+  dst["parameters"]["slaveType"] = src.parameters.slaveType;
+  dst["parameters"]["slaveVersion"] = src.parameters.slaveVersion;
+  dst["parameters"]["slaveOtVersion"] = src.parameters.slaveOtVersion;
 }

 bool jsonToVars(const JsonVariantConst src, Variables& dst) {
@@ -1031,7 +1260,7 @@ bool jsonToVars(const JsonVariantConst src, Variables& dst) {
  if (!src["temperatures"]["indoor"].isNull()) {
    double value = src["temperatures"]["indoor"].as<double>();

-    if (settings.sensors.indoor.type == SensorType::MANUAL && value > -100 && value < 100) {
+    if (settings.sensors.indoor.type == SensorType::MANUAL && isValidTemp(value, settings.system.unitSystem, -99.9f, 99.9f)) {
      dst.temperatures.indoor = roundd(value, 2);
      changed = true;
    }
@@ -1040,7 +1269,7 @@ bool jsonToVars(const JsonVariantConst src, Variables& dst) {
  if (!src["temperatures"]["outdoor"].isNull()) {
    double value = src["temperatures"]["outdoor"].as<double>();

-    if (settings.sensors.outdoor.type == SensorType::MANUAL && value > -100 && value < 100) {
+    if (settings.sensors.outdoor.type == SensorType::MANUAL && isValidTemp(value, settings.system.unitSystem, -99.9f, 99.9f)) {
      dst.temperatures.outdoor = roundd(value, 2);
      changed = true;
    }
--- a/src_data/dashboard.html
+++ b/src_data/dashboard.html
@@ -0,0 +1,415 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <title>Dashboard - OpenTherm Gateway</title>
+    <link rel="stylesheet" href="/static/pico.min.css">
+    <link rel="stylesheet" href="/static/app.css"/>
+  </head>
+
+  <body>
+    <header class="container">
+      <nav>
+        <ul>
+          <li><a href="/"><div class="logo">OpenTherm Gateway</div></a></li>
+        </ul>
+        <ul>
+          <li><a href="https://github.com/Laxilef/OTGateway/wiki" role="button" class="secondary" target="_blank">Help</a></li>
+        </ul>
+      </nav>
+    </header>
+
+    <main class="container">
+      <article>
+        <hgroup>
+          <h2>Dashboard</h2>
+          <p></p>
+        </hgroup>
+
+        <div id="dashboard-busy" aria-busy="true"></div>
+        <div id="dashboard-container" class="hidden">
+          <details open>
+            <summary><b>Control</b></summary>
+            <div class="grid">
+              <div class="thermostat" id="thermostat-heating">
+                <div class="thermostat-header">Heating</div>
+                <div class="thermostat-temp">
+                  <div class="thermostat-temp-target"><span id="thermostat-heating-target"></span> <span class="temp-unit"></span></div>
+                  <div class="thermostat-temp-current">Current: <span id="thermostat-heating-current"></span> <span class="temp-unit"></span></div>
+                </div>
+                <div class="thermostat-minus"><button id="thermostat-heating-minus" class="outline"><b>-</b></button></div>
+                <div class="thermostat-plus"><button id="thermostat-heating-plus" class="outline"><b>+</b></button></div>
+                <div class="thermostat-control">
+                  <input type="checkbox" role="switch" id="thermostat-heating-enabled" value="true">
+                  <label htmlFor="thermostat-heating-enabled">Enable</label>
+
+                  <input type="checkbox" role="switch" id="thermostat-heating-turbo" value="true">
+                  <label htmlFor="thermostat-heating-turbo">Turbo mode</label>
+                </div>
+              </div>
+
+              <div class="thermostat" id="thermostat-dhw">
+                <div class="thermostat-header">DHW</div>
+                <div class="thermostat-temp">
+                  <div class="thermostat-temp-target"><span id="thermostat-dhw-target"></span> <span class="temp-unit"></span></div>
+                  <div class="thermostat-temp-current">Current: <span id="thermostat-dhw-current"></span> <span class="temp-unit"></span></div>
+                </div>
+                <div class="thermostat-minus"><button class="outline" id="thermostat-dhw-minus"><b>-</b></button></div>
+                <div class="thermostat-plus"><button class="outline" id="thermostat-dhw-plus"><b>+</b></button></div>
+                <div class="thermostat-control">
+                  <input type="checkbox" role="switch" id="thermostat-dhw-enabled" value="true">
+                  <label htmlFor="thermostat-dhw-enabled">Enable</label>
+                </div>
+              </div>
+            </div>
+          </details>
+
+          <hr />
+
+          <details>
+            <summary><b>States and sensors</b></summary>
+            <table>
+              <tbody>
+                <tr>
+                  <th scope="row">OpenTherm connected:</th>
+                  <td><input type="radio" id="ot-connected" aria-invalid="false" checked disabled /></td>
+                </tr>
+                <tr>
+                  <th scope="row">MQTT connected:</th>
+                  <td><input type="radio" id="mqtt-connected" aria-invalid="false" checked disabled /></td>
+                </tr>
+                <tr>
+                  <th scope="row">Emergency:</th>
+                  <td><input type="radio" id="ot-emergency" aria-invalid="false" checked disabled /></td>
+                </tr>
+                <tr>
+                  <th scope="row">Heating:</th>
+                  <td><input type="radio" id="ot-heating" aria-invalid="false" checked disabled /></td>
+                </tr>
+                <tr>
+                  <th scope="row">DHW:</th>
+                  <td><input type="radio" id="ot-dhw" aria-invalid="false" checked disabled /></td>
+                </tr>
+                <tr>
+                  <th scope="row">Flame:</th>
+                  <td><input type="radio" id="ot-flame" aria-invalid="false" checked disabled /></td>
+                </tr>
+                <tr>
+                  <th scope="row">Fault:</th>
+                  <td><input type="radio" id="ot-fault" aria-invalid="false" checked disabled /></td>
+                </tr>
+                <tr>
+                  <th scope="row">Diagnostic:</th>
+                  <td><input type="radio" id="ot-diagnostic" aria-invalid="false" checked disabled /></td>
+                </tr>
+                <tr>
+                  <th scope="row">External pump:</th>
+                  <td><input type="radio" id="ot-external-pump" aria-invalid="false" checked disabled /></td>
+                </tr>
+                <tr>
+                  <th scope="row">Modulation:</th>
+                  <td><b id="ot-modulation"></b> %</td>
+                </tr>
+                <tr>
+                  <th scope="row">Pressure:</th>
+                  <td><b id="ot-pressure"></b> <span class="pressure-unit"></span></td>
+                </tr>
+                <tr>
+                  <th scope="row">DHW flow rate:</th>
+                  <td><b id="ot-dhw-flow-rate"></b> <span class="volume-unit"></span>/min</td>
+                </tr>
+                <tr>
+                  <th scope="row">Fault code:</th>
+                  <td><b id="ot-fault-code"></b></td>
+                </tr>
+                <tr>
+                  <th scope="row">Indoor temp:</th>
+                  <td><b id="indoor-temp"></b> <span class="temp-unit"></span></td>
+                </tr>
+                <tr>
+                  <th scope="row">Outdoor temp:</th>
+                  <td><b id="outdoor-temp"></b> <span class="temp-unit"></span></td>
+                </tr>
+                <tr>
+                  <th scope="row">Heating temp:</th>
+                  <td><b id="heating-temp"></b> <span class="temp-unit"></span></td>
+                </tr>
+                <tr>
+                  <th scope="row">Heating setpoint temp:</th>
+                  <td><b id="heating-setpoint-temp"></b> <span class="temp-unit"></span></td>
+                </tr>
+                <tr>
+                  <th scope="row">Heating return temp:</th>
+                  <td><b id="heating-return-temp"></b> <span class="temp-unit"></span></td>
+                </tr>
+                <tr>
+                  <th scope="row">DHW temp:</th>
+                  <td><b id="dhw-temp"></b> <span class="temp-unit"></span></td>
+                </tr>
+                <tr>
+                  <th scope="row">Exhaust temp:</th>
+                  <td><b id="exhaust-temp"></b> <span class="temp-unit"></span></td>
+                </tr>
+              </tbody>
+            </table>
+          </details>
+
+          <hr />
+
+          <details>
+            <summary><b>OpenTherm diagnostic</b></summary>
+            <pre><b>Vendor:</b>          <span id="slave-vendor"></span>
+<b>Member ID:</b>       <span id="slave-member-id"></span>
+<b>Flags:</b>           <span id="slave-flags"></span>
+<b>Type:</b>            <span id="slave-type"></span>
+<b>Version:</b>         <span id="slave-version"></span>
+<b>OT version:</b>      <span id="slave-ot-version"></span>
+<b>Heating limits:</b>  <span id="heating-min-temp"></span>...<span id="heating-max-temp"></span> <span class="temp-unit"></span>
+<b>DHW limits:</b>      <span id="dhw-min-temp"></span>...<span id="dhw-max-temp"></span> <span class="temp-unit"></span></pre>
+          </details>
+        </div>
+      </article>
+    </main>
+
+    <footer class="container">
+      <small>
+        <b>Made by Laxilef</b>
+        • <a href="https://github.com/Laxilef/OTGateway/blob/master/LICENSE" target="_blank" class="secondary">License</a>
+        • <a href="https://github.com/Laxilef/OTGateway/blob/master/" target="_blank" class="secondary">Source code</a>
+        • <a href="https://github.com/Laxilef/OTGateway/wiki" target="_blank" class="secondary">Help</a>
+        • <a href="https://github.com/Laxilef/OTGateway/issues" target="_blank" class="secondary">Issue & questions</a>
+        • <a href="https://github.com/Laxilef/OTGateway/releases" target="_blank" class="secondary">Releases</a>
+      </small>
+    </footer>
+
+    <script src="/static/app.js"></script>
+    <script>
+      let modifiedTime = null;
+      let noRegulators;
+      let prevSettings;
+      let newSettings = {
+        heating: {
+          enable: false,
+          turbo: false,
+          target: 0
+        },
+        dhw: {
+          enable: false,
+          target: 0
+        }
+      };
+
+      window.onload = async function () {
+        document.querySelector('#thermostat-heating-minus').addEventListener('click', (event) => {
+          if (!prevSettings) {
+            return;
+          }
+          
+          newSettings.heating.target -= 0.5;
+          modifiedTime = Date.now();
+
+          let minTemp;
+          if (noRegulators) {
+            minTemp = prevSettings.heating.minTemp;
+          } else {
+            minTemp = prevSettings.system.unitSystem == 0 ? 5 : 41;
+          }
+
+          if (prevSettings && newSettings.heating.target < minTemp) {
+            newSettings.heating.target = minTemp;
+          }
+
+          setValue('#thermostat-heating-target', newSettings.heating.target);
+        });
+
+        document.querySelector('#thermostat-heating-plus').addEventListener('click', (event) => {
+          if (!prevSettings) {
+            return;
+          } 
+          
+          newSettings.heating.target += 0.5;
+          modifiedTime = Date.now();
+
+          let maxTemp;
+          if (noRegulators) {
+            maxTemp = prevSettings.heating.maxTemp;
+          } else {
+            maxTemp = prevSettings.system.unitSystem == 0 ? 30 : 86;
+          }
+
+          if (prevSettings && newSettings.heating.target > maxTemp) {
+            newSettings.heating.target = maxTemp;
+          }
+
+          setValue('#thermostat-heating-target', newSettings.heating.target);
+        });
+
+        document.querySelector('#thermostat-dhw-minus').addEventListener('click', (event) => {
+          if (!prevSettings) {
+            return;
+          }
+          
+          newSettings.dhw.target -= 1;
+          modifiedTime = Date.now();
+
+          if (newSettings.dhw.target < prevSettings.dhw.minTemp) {
+            newSettings.dhw.target = prevSettings.dhw.minTemp;
+          }
+
+          setValue('#thermostat-dhw-target', newSettings.dhw.target);
+        });
+
+        document.querySelector('#thermostat-dhw-plus').addEventListener('click', (event) => {
+          if (!prevSettings) {
+            return;
+          }
+          
+          newSettings.dhw.target += 1;
+          modifiedTime = Date.now();
+
+          if (newSettings.dhw.target > prevSettings.dhw.maxTemp) {
+            newSettings.dhw.target = prevSettings.dhw.maxTemp;
+          }
+
+          setValue('#thermostat-dhw-target', newSettings.dhw.target);
+        });
+
+        document.querySelector('#thermostat-heating-enabled').addEventListener('change', (event) => {
+          modifiedTime = Date.now();
+          newSettings.heating.enable = event.currentTarget.checked;
+        });
+
+        document.querySelector('#thermostat-heating-turbo').addEventListener('change', (event) => {
+          modifiedTime = Date.now();
+          newSettings.heating.turbo = event.currentTarget.checked;
+        });
+
+        document.querySelector('#thermostat-dhw-enabled').addEventListener('change', (event) => {
+          modifiedTime = Date.now();
+          newSettings.heating.dhw = event.currentTarget.checked;
+        });
+
+        setTimeout(async function onLoadPage() {
+          if (modifiedTime) {
+            if ((Date.now() - modifiedTime) < 5000) {
+              setTimeout(onLoadPage, 1000);
+              return;
+            }
+
+            modifiedTime = null;
+          }
+
+          // settings
+          try {
+            let modified = prevSettings && (
+              (prevSettings.heating.enable != newSettings.heating.enable)
+              || (prevSettings.heating.turbo != newSettings.heating.turbo)
+              || (prevSettings.heating.target != newSettings.heating.target)
+              || (prevSettings.opentherm.dhwPresent && prevSettings.dhw.enable != newSettings.dhw.enable)
+              || (prevSettings.opentherm.dhwPresent && prevSettings.dhw.target != newSettings.dhw.target)
+            );
+
+            if (modified) {
+              console.log(newSettings);
+            }
+
+            let parameters = {cache: 'no-cache'};
+            if (modified) {
+              parameters.method = "POST";
+              parameters.body = JSON.stringify(newSettings);
+            }
+
+            const response = await fetch('/api/settings', parameters);
+            if (!response.ok) {
+              throw new Error('Response not valid');
+            }
+
+            const result = await response.json();
+            noRegulators = !result.equitherm.enable && !result.pid.enable;
+            prevSettings = result;
+            newSettings.heating.enable = result.heating.enable;
+            newSettings.heating.turbo = result.heating.turbo;
+            newSettings.heating.target = result.heating.target;
+            newSettings.dhw.enable = result.dhw.enable;
+            newSettings.dhw.target = result.dhw.target;
+
+            if (result.opentherm.dhwPresent) {
+              show('#thermostat-dhw');
+            } else {
+              hide('#thermostat-dhw');
+            }
+
+            setCheckboxValue('#thermostat-heating-enabled', result.heating.enable);
+            setCheckboxValue('#thermostat-heating-turbo', result.heating.turbo);
+            setValue('#thermostat-heating-target', result.heating.target);
+
+            setCheckboxValue('#thermostat-dhw-enabled', result.dhw.enable);
+            setValue('#thermostat-dhw-target', result.dhw.target);
+
+            setValue('.temp-unit', temperatureUnit(result.system.unitSystem));
+            setValue('.pressure-unit', pressureUnit(result.system.unitSystem));
+            setValue('.volume-unit', volumeUnit(result.system.unitSystem));
+
+          } catch (error) {
+            console.log(error);
+          }
+
+          // vars
+          try {
+            const response = await fetch('/api/vars', { cache: 'no-cache' });
+            if (!response.ok) {
+              throw new Error('Response not valid');
+            }
+
+            const result = await response.json();
+            setValue('#thermostat-heating-current', noRegulators ? result.temperatures.heating : result.temperatures.indoor);
+            setValue('#thermostat-dhw-current', result.temperatures.dhw);
+
+            setState('#ot-connected', result.states.otStatus);
+            setState('#ot-emergency', result.states.emergency);
+            setState('#ot-heating', result.states.heating);
+            setState('#ot-dhw', result.states.dhw);
+            setState('#ot-flame', result.states.flame);
+            setState('#ot-fault', result.states.fault);
+            setState('#ot-diagnostic', result.states.diagnostic);
+            setState('#ot-external-pump', result.states.externalPump);
+            setState('#mqtt-connected', result.states.mqtt);
+
+            setValue('#ot-modulation', result.sensors.modulation);
+            setValue('#ot-pressure', result.sensors.pressure);
+            setValue('#ot-dhw-flow-rate', result.sensors.dhwFlowRate);
+            setValue('#ot-fault-code', result.sensors.faultCode ? ("E" + result.sensors.faultCode) : "-");
+
+            setValue('#indoor-temp', result.temperatures.indoor);
+            setValue('#outdoor-temp', result.temperatures.outdoor);
+            setValue('#heating-temp', result.temperatures.heating);
+            setValue('#heating-return-temp', result.temperatures.heatingReturn);
+            setValue('#dhw-temp', result.temperatures.dhw);
+            setValue('#exhaust-temp', result.temperatures.exhaust);
+
+            setValue('#heating-min-temp', result.parameters.heatingMinTemp);
+            setValue('#heating-max-temp', result.parameters.heatingMaxTemp);
+            setValue('#heating-setpoint-temp', result.parameters.heatingSetpoint);
+            setValue('#dhw-min-temp', result.parameters.dhwMinTemp);
+            setValue('#dhw-max-temp', result.parameters.dhwMaxTemp);
+
+            setValue('#slave-member-id', result.parameters.slaveMemberId);
+            setValue('#slave-vendor', memberIdToVendor(result.parameters.slaveMemberId));
+
+            setValue('#slave-flags', result.parameters.slaveFlags);
+            setValue('#slave-type', result.parameters.slaveType);
+            setValue('#slave-version', result.parameters.slaveVersion);
+            setValue('#slave-ot-version', result.parameters.slaveOtVersion);
+            setBusy('#dashboard-busy', '#dashboard-container', false);
+
+          } catch (error) {
+            console.log(error);
+          }
+
+          setTimeout(onLoadPage, 10000);
+        }, 1000);
+      };
+    </script>
+  </body>
+</html>
--- a/src_data/index.html
+++ b/src_data/index.html
@@ -0,0 +1,178 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <title>OpenTherm Gateway</title>
+    <link rel="stylesheet" href="/static/pico.min.css">
+    <link rel="stylesheet" href="/static/app.css"/>
+  </head>
+
+  <body>
+    <header class="container">
+      <nav>
+        <ul>
+          <li><a href="/"><div class="logo">OpenTherm Gateway</div></a></li>
+        </ul>
+        <ul>
+          <li><a href="https://github.com/Laxilef/OTGateway/wiki" role="button" class="secondary" target="_blank">Help</a></li>
+        </ul>
+      </nav>
+    </header>
+
+    <main class="container">
+      <article>
+        <div>
+          <hgroup>
+            <h2>Network</h2>
+            <p></p>
+          </hgroup>
+
+          <div id="main-busy" aria-busy="true"></div>
+          <table id="main-table" class="hidden">
+            <tbody>
+              <tr>
+                <th scope="row">Hostname:</th>
+                <td><b id="network-hostname"></b></td>
+              </tr>
+              <tr>
+                <th scope="row">MAC:</th>
+                <td><b id="network-mac"></b></td>
+              </tr>
+              <tr>
+                <th scope="row">Connected:</th>
+                <td><input type="radio" id="network-connected" aria-invalid="false" checked disabled /></td>
+              </tr>
+              <tr>
+                <th scope="row">SSID:</th>
+                <td><b id="network-ssid"></b></td>
+              </tr>
+              <tr>
+                <th scope="row">Signal:</th>
+                <td><b id="network-signal"></b> %</td>
+              </tr>
+              <tr>
+                <th scope="row">IP:</th>
+                <td><b id="network-ip"></b></td>
+              </tr>
+              <tr>
+                <th scope="row">Subnet:</th>
+                <td><b id="network-subnet"></b></td>
+              </tr>
+              <tr>
+                <th scope="row">Gateway:</th>
+                <td><b id="network-gateway"></b></td>
+              </tr>
+              <tr>
+                <th scope="row">DNS:</th>
+                <td><b id="network-dns"></b></td>
+              </tr>
+            </tbody>
+          </table>
+          <div class="grid">
+            <a href="/network.html" role="button">Network settings</a>
+          </div>
+        </div>
+      </article>
+
+      <article>
+        <div>
+          <hgroup>
+            <h2>System</h2>
+            <p></p>
+          </hgroup>
+
+          <div id="system-busy" aria-busy="true"></div>
+          <table id="system-table" class="hidden">
+            <tbody>
+              <tr>
+                <th scope="row">Version:</th>
+                <td><b id="version"></b></td>
+              </tr>
+              <tr>
+                <th scope="row">Build date:</th>
+                <td><b id="build-date"></b></td>
+              </tr>
+              <tr>
+                <th scope="row">Uptime:</th>
+                <td><b id="uptime-days"></b> days, <b id="uptime-hours"></b> hours, <b id="uptime-min"></b> min., <b id="uptime-sec"></b> sec.</td>
+              </tr>
+              <tr>
+                <th scope="row">Free memory:</th>
+                <td><b id="free-heap"></b> of <b id="total-heap"></b> bytes (min: <b id="min-free-heap"></b> bytes)<br />max free block: <b id="max-free-block-heap"></b> bytes (min: <b id="min-max-free-block-heap"></b> bytes)</td>
+              </tr>
+              <tr>
+                <th scope="row">Last reset reason:</th>
+                <td><b id="reset-reason"></b></td>
+              </tr>
+            </tbody>
+          </table>
+
+          <div class="grid">
+            <a href="/dashboard.html" role="button">Dashboard</a>
+            <a href="/settings.html" role="button">Settings</a>
+            <a href="/upgrade.html" role="button">Upgrade</a>
+            <a href="/restart.html" role="button" class="secondary restart">Restart</a>
+          </div>
+        </div>
+      </article>
+    </main>
+
+    <footer class="container">
+      <small>
+        <b>Made by Laxilef</b>
+        • <a href="https://github.com/Laxilef/OTGateway/blob/master/LICENSE" target="_blank" class="secondary">License</a>
+        • <a href="https://github.com/Laxilef/OTGateway/blob/master/" target="_blank" class="secondary">Source code</a>
+        • <a href="https://github.com/Laxilef/OTGateway/wiki" target="_blank" class="secondary">Help</a>
+        • <a href="https://github.com/Laxilef/OTGateway/issues" target="_blank" class="secondary">Issue & questions</a>
+        • <a href="https://github.com/Laxilef/OTGateway/releases" target="_blank" class="secondary">Releases</a>
+      </small>
+    </footer>
+
+    <script src="/static/app.js"></script>
+    <script>
+      window.onload = async function () {
+        setTimeout(async function onLoadPage() {
+          try {
+            const response = await fetch('/api/info', { cache: 'no-cache' });
+            if (!response.ok) {
+              throw new Error('Response not valid');
+            }
+
+            const result = await response.json();
+            setValue('#network-hostname', result.network.hostname);
+            setValue('#network-mac', result.network.mac);
+            setState('#network-connected', result.network.connected);
+            setValue('#network-ssid', result.network.ssid);
+            setValue('#network-signal', result.network.signalQuality);
+            setValue('#network-ip', result.network.ip);
+            setValue('#network-subnet', result.network.subnet);
+            setValue('#network-gateway', result.network.gateway);
+            setValue('#network-dns', result.network.dns);
+            setBusy('#main-busy', '#main-table', false);
+
+            setValue('#version', result.system.version);
+            setValue('#build-date', result.system.buildDate);
+            setValue('#uptime', result.system.uptime);
+            setValue('#uptime-days', Math.floor(result.system.uptime / 86400));
+            setValue('#uptime-hours', Math.floor(result.system.uptime % 86400 / 3600));
+            setValue('#uptime-min', Math.floor(result.system.uptime % 3600 / 60));
+            setValue('#uptime-sec', Math.floor(result.system.uptime % 60));
+            setValue('#total-heap', result.system.totalHeap);
+            setValue('#free-heap', result.system.freeHeap);
+            setValue('#min-free-heap', result.system.minFreeHeap);
+            setValue('#max-free-block-heap', result.system.maxFreeBlockHeap);
+            setValue('#min-max-free-block-heap', result.system.minMaxFreeBlockHeap);
+            setValue('#reset-reason', result.system.resetReason);
+            setBusy('#system-busy', '#system-table', false);
+
+          } catch (error) {
+            console.log(error);
+          }
+
+          setTimeout(onLoadPage, 10000);
+        }, 1000);
+      };
+    </script>
+  </body>
+</html>
--- a/src_data/network.html
+++ b/src_data/network.html
@@ -31,32 +31,38 @@

        <div id="network-settings-busy" aria-busy="true"></div>
        <form action="/api/network/settings" id="network-settings" class="hidden">
-          <label for="hostname">
+          <label for="network-hostname">
            Hostname
-            <input type="text" class="network-hostname" name="hostname" maxlength="24" pattern="[A-Za-z0-9]+[A-Za-z0-9\-]+[A-Za-z0-9]+" required>
+            <input type="text" id="network-hostname" name="hostname" maxlength="24" pattern="[A-Za-z0-9]+[A-Za-z0-9\-]+[A-Za-z0-9]+" required>
          </label>
+
          <label for="network-use-dhcp">
-            <input type="checkbox" class="network-use-dhcp" name="useDhcp" value="true">
+            <input type="checkbox" id="network-use-dhcp" name="useDhcp" value="true">
            Use DHCP
          </label>
-          <br>
-          <hr>
+          <br />
+          <hr />
+
          <label for="network-static-ip">
            Static IP:
-            <input type="text" class="network-static-ip" name="staticConfig[ip]" value="true" maxlength="16" pattern="\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}" required>
+            <input type="text" id="network-static-ip" name="staticConfig[ip]" value="true" maxlength="16" pattern="\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}" required>
          </label>
+
          <label for="network-static-gateway">
            Static gateway:
-            <input type="text" class="network-static-gateway" name="staticConfig[gateway]" maxlength="16" pattern="\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}" required>
+            <input type="text" id="network-static-gateway" name="staticConfig[gateway]" maxlength="16" pattern="\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}" required>
          </label>
+
          <label for="network-static-subnet">
            Static subnet:
-            <input type="text" class="network-static-subnet" name="staticConfig[subnet]" maxlength="16" pattern="\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}" required>
+            <input type="text" id="network-static-subnet" name="staticConfig[subnet]" maxlength="16" pattern="\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}" required>
          </label>
+
          <label for="network-static-dns">
            Static DNS:
-            <input type="text" class="network-static-dns" name="staticConfig[dns]" maxlength="16" pattern="\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}" required>
+            <input type="text" id="network-static-dns" name="staticConfig[dns]" maxlength="16" pattern="\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}" required>
          </label>
+
          <button type="submit">Save</button>
        </form>
      </div>
@@ -82,28 +88,32 @@
              <tbody></tbody>
            </table>
          </figure>
+
          <button type="submit">Refresh</button>
        </form>

-        <hr>
+        <hr />
        <div>
          <hgroup>
            <h2>WiFi settings</h2>
            <p></p>
          </hgroup>
+
          <div id="sta-settings-busy" aria-busy="true"></div>
          <form action="/api/network/settings" id="sta-settings" class="hidden">
            <label for="sta-ssid">
              SSID:
-              <input type="text" class="sta-ssid" name="sta[ssid]" maxlength="32" required>
+              <input type="text" id="sta-ssid" name="sta[ssid]" maxlength="32" required>
            </label>
+
            <label for="sta-password">
              Password:
-              <input type="password" class="sta-password" name="sta[password]" maxlength="64" required>
+              <input type="password" id="sta-password" name="sta[password]" maxlength="64" required>
            </label>
+
            <label for="sta-channel">
              Channel:
-              <input type="number" inputmode="numeric" class="sta-channel" name="sta[channel]" min="0" max="12" step="1" required>
+              <input type="number" inputmode="numeric" id="sta-channel" name="sta[channel]" min="0" max="12" step="1" required>
              <small>set 0 for auto select</small>
            </label>

@@ -119,20 +129,24 @@
          <h2>AP settings</h2>
          <p></p>
        </hgroup>
+
        <div id="ap-settings-busy" aria-busy="true"></div>
        <form action="/api/network/settings" id="ap-settings" class="hidden">
          <label for="ap-ssid">
            SSID:
-            <input type="text" class="ap-ssid" name="ap[ssid]" maxlength="32" required>
+            <input type="text" id="ap-ssid" name="ap[ssid]" maxlength="32" required>
          </label>
+
          <label for="ap-password">
            Password:
-            <input type="text" class="ap-password" name="ap[password]" maxlength="64" required>
+            <input type="text" id="ap-password" name="ap[password]" maxlength="64" required>
          </label>
+
          <label for="ap-channel">
            Channel:
-            <input type="number" inputmode="numeric" class="ap-channel" name="ap[channel]" min="1" max="12" step="1" required>
+            <input type="number" inputmode="numeric" id="ap-channel" name="ap[channel]" min="1" max="12" step="1" required>
          </label>
+
          <button type="submit">Save</button>
        </form>
      </div>
@@ -153,7 +167,34 @@
  <script src="/static/app.js"></script>
  <script>
    window.onload = async function () {
-      await loadNetworkSettings();
+      try {
+        const response = await fetch('/api/network/settings', { cache: 'no-cache' });
+        if (!response.ok) {
+          throw new Error('Response not valid');
+        }
+
+        const result = await response.json();
+        setInputValue('#network-hostname', result.hostname);
+        setCheckboxValue('#network-use-dhcp', result.useDhcp);
+        setInputValue('#network-static-ip', result.staticConfig.ip);
+        setInputValue('#network-static-gateway', result.staticConfig.gateway);
+        setInputValue('#network-static-subnet', result.staticConfig.subnet);
+        setInputValue('#network-static-dns', result.staticConfig.dns);
+        setBusy('#network-settings-busy', '#network-settings', false);
+
+        setInputValue('#sta-ssid', result.sta.ssid);
+        setInputValue('#sta-password', result.sta.password);
+        setInputValue('#sta-channel', result.sta.channel);
+        setBusy('#sta-settings-busy', '#sta-settings', false);
+
+        setInputValue('#ap-ssid', result.ap.ssid);
+        setInputValue('#ap-password', result.ap.password);
+        setInputValue('#ap-channel', result.ap.channel);
+        setBusy('#ap-settings-busy', '#ap-settings', false);
+
+      } catch (error) {
+        console.log(error);
+      }

      setupForm('#network-settings');
      setupNetworkScanForm('#network-scan', '#networks');
--- a/src_data/settings.html
+++ b/src_data/settings.html
@@ -0,0 +1,804 @@
+<!doctype html>
+<html lang="en">
+
+<head>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1" />
+  <title>Settings - OpenTherm Gateway</title>
+  <link rel="stylesheet" href="/static/pico.min.css">
+  <link rel="stylesheet" href="/static/app.css" />
+</head>
+
+<body>
+  <header class="container">
+    <nav>
+      <ul>
+        <li><a href="/"><div class="logo">OpenTherm Gateway</div></a></li>
+      </ul>
+      <ul>
+        <li><a href="https://github.com/Laxilef/OTGateway/wiki" role="button" class="secondary" target="_blank">Help</a></li>
+      </ul>
+    </nav>
+  </header>
+
+  <main class="container">
+    <article>
+      <hgroup>
+        <h2>Settings</h2>
+        <p></p>
+      </hgroup>
+
+      <details>
+        <summary><b>Portal settings</b></summary>
+        <div>
+          <div id="portal-settings-busy" aria-busy="true"></div>
+          <form action="/api/settings" id="portal-settings" class="hidden">
+            <div class="grid">
+              <label for="portal-login">
+                Login
+                <input type="text" id="portal-login" name="portal[login]" maxlength="12" required>
+              </label>
+
+              <label for="portal-password">
+                Password
+                <input type="password" id="portal-password" name="portal[password]" maxlength="32" required>
+              </label>
+            </div>
+
+            <label for="portal-auth">
+              <input type="checkbox" id="portal-auth" name="portal[auth]" value="true">
+              Require authentication
+            </label>
+            <br />
+
+            <button type="submit">Save</button>
+          </form>
+        </div>
+      </details>
+
+      <hr />
+
+      <details>
+        <summary><b>System settings</b></summary>
+        <div>
+          <div id="system-settings-busy" aria-busy="true"></div>
+          <form action="/api/settings" id="system-settings" class="hidden">
+            <fieldset>
+              <legend>Unit system</legend>
+
+              <label>
+                <input type="radio" id="system-unit-system" name="system[unitSystem]" value="0" />
+                Metric (celsius, liters, bar)
+              </label>
+
+              <label>
+                <input type="radio" id="system-unit-system" name="system[unitSystem]" value="1" />
+                Imperial (fahrenheit, gallons, psi)
+              </label>
+            </fieldset>
+
+            <fieldset>
+              <label for="system-status-led-gpio">
+                Status LED GPIO
+                <input type="number" inputmode="numeric" id="system-status-led-gpio" name="system[statusLedGpio]" min="0" max="254" step="1">
+                <small>blank - not use</small>
+              </label>
+            </fieldset>
+
+            <fieldset>
+              <legend>Diagnostic</legend>
+
+              <label for="system-debug">
+                <input type="checkbox" id="system-debug" name="system[debug]" value="true">
+                Debug mode
+              </label>
+
+              <label for="system-serial-enable">
+                <input type="checkbox" id="system-serial-enable" name="system[serial][enable]" value="true">
+                Enable Serial port
+              </label>
+
+              <label for="system-telnet-enable">
+                <input type="checkbox" id="system-telnet-enable" name="system[telnet][enable]" value="true">
+                Enable Telnet
+              </label>
+
+              <div class="grid">
+                <label for="system-serial-baudrate">
+                  Serial port baud rate
+                  <input type="number" inputmode="numeric" id="system-serial-baudrate" name="system[serial][baudrate]" min="9600" max="115200" step="1" required>
+                  <small>Available: 9600, 19200, 38400, 57600, 74880, 115200</small>
+                </label>
+
+                <label for="system-telnet-port">
+                  Telnet port
+                  <input type="number" inputmode="numeric" id="system-telnet-port" name="system[telnet][port]" min="1" max="65535" step="1" required>
+                  <small>Default: 23</small>
+                </label>
+              </div>
+            </fieldset>
+
+            <fieldset>
+              <mark>After changing this settings, the ESP must be restarted for the changes to take effect.</mark>
+            </fieldset>
+
+            <button type="submit">Save</button>
+          </form>
+        </div>
+      </details>
+
+
+      <hr />
+
+      <details>
+        <summary><b>Heating settings</b></summary>
+        <div>
+          <div id="heating-settings-busy" aria-busy="true"></div>
+          <form action="/api/settings" id="heating-settings" class="hidden">
+            <div class="grid">
+              <label for="heating-min-temp">
+                Minimum temperature
+                <input type="number" inputmode="numeric" id="heating-min-temp" name="heating[minTemp]" min="0" max="0" step="1" required>
+              </label>
+
+              <label for="heating-max-temp">
+                Maximum temperature
+                <input type="number" inputmode="numeric" id="heating-max-temp" name="heating[maxTemp]" min="0" max="0" step="1" required>
+              </label>
+            </div>
+
+            <div class="grid">
+              <label for="heating-hysteresis">
+                Hysteresis
+                <input type="number" inputmode="numeric" id="heating-hysteresis" name="heating[hysteresis]" min="0" max="5" step="0.05" required>
+              </label>
+
+              <label for="heating-max-modulation">
+                Max modulation level
+                <input type="number" inputmode="numeric" id="heating-max-modulation" name="heating[maxModulation]" min="1" max="100" step="1" required>
+              </label>
+            </div>
+
+            <button type="submit">Save</button>
+          </form>
+        </div>
+      </details>
+
+      <hr />
+
+      <details>
+        <summary><b>DHW settings</b></summary>
+        <div>
+          <div id="dhw-settings-busy" aria-busy="true"></div>
+          <form action="/api/settings" id="dhw-settings" class="hidden">
+            <div class="grid">
+              <label for="dhw-min-temp">
+                Minimum temperature
+                <input type="number" inputmode="numeric" id="dhw-min-temp" name="dhw[minTemp]" min="0" max="0" step="1" required>
+              </label>
+
+              <label for="dhw-max-temp">
+                Maximum temperature
+                <input type="number" inputmode="numeric" id="dhw-max-temp" name="dhw[maxTemp]" min="0" max="0" step="1" required>
+              </label>
+            </div>
+
+            <button type="submit">Save</button>
+          </form>
+        </div>
+      </details>
+
+      <hr />
+
+      <details>
+        <summary><b>Emergency mode settings</b></summary>
+        <div>
+          <div id="emergency-settings-busy" aria-busy="true"></div>
+          <form action="/api/settings" id="emergency-settings" class="hidden">
+            <fieldset>
+              <label for="emergency-enable">
+                <input type="checkbox" id="emergency-enable" name="emergency[enable]" value="true">
+                Enable
+              </label>
+
+              <small>
+                <b>!</b> Emergency mode can be useful <u>only</u> when using Equitherm and/or PID (when normal work) and when reporting indoor/outdoor temperature via MQTT or API. In this mode, sensor values that are reported via MQTT/API are not used.
+              </small>
+            </fieldset>
+
+            <div class="grid">
+              <label for="emergency-target">
+                Target temperature
+                <input type="number" inputmode="numeric" id="emergency-target" name="emergency[target]" min="0" max="0" step="1" required>
+                <small>
+                  <u>Indoor temperature</u> if Equitherm or PID is <b>enabled</b><br />
+                  <u>Heat carrier temperature</u> if Equitherm and PID <b>is disabled</b>
+                </small>
+              </label>
+
+              <label for="emergency-treshold-time">
+                Treshold time <small>(sec)</small>
+                <input type="number" inputmode="numeric" id="emergency-treshold-time" name="emergency[tresholdTime]" min="60" max="1800" step="1" required>
+              </label>
+            </div>
+
+            <fieldset>
+              <legend>Events</legend>
+
+              <label for="emergency-on-network-fault">
+                <input type="checkbox" id="emergency-on-network-fault" name="emergency[onNetworkFault]" value="true">
+                On network fault
+              </label>
+
+              <label for="emergency-on-mqtt-fault">
+                <input type="checkbox" id="emergency-on-mqtt-fault" name="emergency[onMqttFault]" value="true">
+                On MQTT fault
+              </label>
+            </fieldset>
+
+            <fieldset>
+              <legend>Using regulators</legend>
+
+              <label for="emergency-use-equitherm">
+                <input type="checkbox" id="emergency-use-equitherm" name="emergency[useEquitherm]" value="true">
+                <span>
+                  Equitherm <small>(requires at least an external/boiler <u>outdoor</u> sensor)</small>
+                </span>
+              </label>
+              <label for="emergency-use-pid">
+                <input type="checkbox" id="emergency-use-pid" name="emergency[usePid]" value="true">
+                <span>
+                  PID <small>(requires at least an external/BLE <u>indoor</u> sensor)</small>
+                </span>
+              </label>
+            </fieldset>
+
+            <button type="submit">Save</button>
+          </form>
+        </div>
+      </details>
+
+      <hr />
+
+      <details>
+        <summary><b>Equitherm settings</b></summary>
+        <div>
+          <div id="equitherm-settings-busy" aria-busy="true"></div>
+          <form action="/api/settings" id="equitherm-settings" class="hidden">
+            <fieldset>
+              <label for="equitherm-enable">
+                <input type="checkbox" id="equitherm-enable" name="equitherm[enable]" value="true">
+                Enable
+              </label>
+            </fieldset>
+
+            <div class="grid">
+              <label for="equitherm-n-factor">
+                N factor
+                <input type="number" inputmode="numeric" id="equitherm-n-factor" name="equitherm[n_factor]" min="0.001" max="10" step="0.001" required>
+              </label>
+
+              <label for="equitherm-k-factor">
+                K factor
+                <input type="number" inputmode="numeric" id="equitherm-k-factor" name="equitherm[k_factor]" min="0" max="10" step="0.01" required>
+              </label>
+
+              <label for="equitherm-t-factor">
+                T factor
+                <input type="number" inputmode="numeric" id="equitherm-t-factor" name="equitherm[t_factor]" min="0" max="10" step="0.01" required>
+                <small>Not used if PID is enabled</small>
+              </label>
+            </div>
+
+            <button type="submit">Save</button>
+          </form>
+        </div>
+      </details>
+
+      <hr />
+
+      <details>
+        <summary><b>PID settings</b></summary>
+        <div>
+          <div id="pid-settings-busy" aria-busy="true"></div>
+          <form action="/api/settings" id="pid-settings" class="hidden">
+            <fieldset>
+              <label for="pid-enable">
+                <input type="checkbox" id="pid-enable" name="pid[enable]" value="true">
+                Enable
+              </label>
+            </fieldset>
+
+            <div class="grid">
+              <label for="pid-p-factor">
+                P factor
+                <input type="number" inputmode="numeric" id="pid-p-factor" name="pid[p_factor]" min="0.1" max="1000" step="0.1" required>
+              </label>
+
+              <label for="pid-i-factor">
+                I factor
+                <input type="number" inputmode="numeric" id="pid-i-factor" name="pid[i_factor]" min="0" max="100" step="0.001" required>
+              </label>
+
+              <label for="pid-d-factor">
+                D factor
+                <input type="number" inputmode="numeric" id="pid-d-factor" name="pid[d_factor]" min="0" max="100000" step="1" required>
+              </label>
+            </div>
+
+            <label for="pid-dt">
+              DT <small>in seconds</small>
+              <input type="number" inputmode="numeric" id="pid-dt" name="pid[dt]" min="30" max="600" step="1" required>
+            </label>
+
+            <hr />
+
+            <div class="grid">
+              <label for="pid-min-temp">
+                Minimum temperature
+                <input type="number" inputmode="numeric" id="pid-min-temp" name="pid[minTemp]" min="0" max="0" step="1" required>
+              </label>
+
+              <label for="pid-max-temp">
+                Maximum temperature
+                <input type="number" inputmode="numeric" id="pid-max-temp" name="pid[maxTemp]" min="0" max="0" step="1" required>
+              </label>
+            </div>
+
+            <button type="submit">Save</button>
+          </form>
+        </div>
+      </details>
+
+      <hr />
+
+      <details>
+        <summary><b>OpenTherm settings</b></summary>
+        <div>
+          <div id="opentherm-settings-busy" aria-busy="true"></div>
+          <form action="/api/settings" id="opentherm-settings" class="hidden">
+            <fieldset>
+              <legend>Unit system</legend>
+
+              <label>
+                <input type="radio" id="opentherm-unit-system" name="opentherm[unitSystem]" value="0" />
+                Metric (celsius)
+              </label>
+
+              <label>
+                <input type="radio" id="opentherm-unit-system" name="opentherm[unitSystem]" value="1" />
+                Imperial (fahrenheit)
+              </label>
+            </fieldset>
+
+            <div class="grid">
+              <label for="opentherm-in-gpio">
+                In GPIO
+                <input type="number" inputmode="numeric" id="opentherm-in-gpio" name="opentherm[inGpio]" min="0" max="254" step="1">
+              </label>
+
+              <label for="opentherm-in-gpio">
+                Out GPIO
+                <input type="number" inputmode="numeric" id="opentherm-out-gpio" name="opentherm[outGpio]" min="0" max="254" step="1">
+              </label>
+            </div>
+
+            <div class="grid">
+              <label for="opentherm-rx-led-gpio">
+                RX LED GPIO
+                <input type="number" inputmode="numeric" id="opentherm-rx-led-gpio" name="opentherm[rxLedGpio]" min="0" max="254" step="1">
+                <small>blank - not use</small>
+              </label>
+
+              <label for="opentherm-member-id-code">
+                Master MemberID code
+                <input type="number" inputmode="numeric" id="opentherm-member-id-code" name="opentherm[memberIdCode]" min="0" max="65535" step="1" required>
+              </label>
+            </div>
+
+            <fieldset>
+              <legend>Options</legend>
+              <label for="opentherm-dhw-present">
+                <input type="checkbox" id="opentherm-dhw-present" name="opentherm[dhwPresent]" value="true">
+                DHW present
+              </label>
+
+              <label for="opentherm-sw-mode">
+                <input type="checkbox" id="opentherm-sw-mode" name="opentherm[summerWinterMode]" value="true">
+                Summer/winter mode
+              </label>
+
+              <label for="opentherm-heating-ch2-enabled">
+                <input type="checkbox" id="opentherm-heating-ch2-enabled" name="opentherm[heatingCh2Enabled]" value="true">
+                Heating CH2 always enabled
+              </label>
+
+              <label for="opentherm-heating-ch1-to-ch2">
+                <input type="checkbox" id="opentherm-heating-ch1-to-ch2" name="opentherm[heatingCh1ToCh2]" value="true">
+                Duplicate heating CH1 to CH2
+              </label>
+
+              <label for="opentherm-dhw-to-ch2">
+                <input type="checkbox" id="opentherm-dhw-to-ch2" name="opentherm[dhwToCh2]" value="true">
+                Duplicate DHW to CH2
+              </label>
+
+              <label for="opentherm-dhw-blocking">
+                <input type="checkbox" id="opentherm-dhw-blocking" name="opentherm[dhwBlocking]" value="true">
+                DHW blocking
+              </label>
+
+              <label for="opentherm-sync-modulation-with-heating">
+                <input type="checkbox" id="opentherm-sync-modulation-with-heating" name="opentherm[modulationSyncWithHeating]" value="true">
+                Sync modulation with heating
+              </label>
+
+              <label for="opentherm-get-min-max-temp">
+                <input type="checkbox" id="opentherm-get-min-max-temp" name="opentherm[getMinMaxTemp]" value="true">
+                Get min/max temp from boiler
+              </label>
+            </fieldset>
+
+            <button type="submit">Save</button>
+          </form>
+        </div>
+      </details>
+
+      <hr />
+
+      <details>
+        <summary><b>MQTT settings</b></summary>
+        <div>
+          <div id="mqtt-settings-busy" aria-busy="true"></div>
+          <form action="/api/settings" id="mqtt-settings" class="hidden">
+            <fieldset>
+              <label for="mqtt-enable">
+                <input type="checkbox" id="mqtt-enable" name="mqtt[enable]" value="true">
+                Enable
+              </label>
+            </fieldset>
+
+            <div class="grid">
+              <label for="mqtt-server">
+                Server
+                <input type="text" id="mqtt-server" name="mqtt[server]" maxlength="80" required>
+              </label>
+
+              <label for="mqtt-port">
+                Port
+                <input type="number" inputmode="numeric" id="mqtt-port" name="mqtt[port]" min="1" max="65535" step="1" required>
+              </label>
+            </div>
+
+            <div class="grid">
+              <label for="mqtt-user">
+                User
+                <input type="text" id="mqtt-user" name="mqtt[user]" maxlength="32" required>
+              </label>
+
+              <label for="mqtt-password">
+                Password
+                <input type="password" id="mqtt-password" name="mqtt[password]" maxlength="32">
+              </label>
+            </div>
+
+            <div class="grid">
+              <label for="mqtt-prefix">
+                Prefix
+                <input type="text" id="mqtt-prefix" name="mqtt[prefix]" maxlength="32" required>
+              </label>
+
+              <label for="mqtt-interval">
+                Publish interval <small>(sec)</small>
+                <input type="number" inputmode="numeric" id="mqtt-interval" name="mqtt[interval]" min="3" max="60" step="1" required>
+              </label>
+            </div>
+
+            <button type="submit">Save</button>
+          </form>
+        </div>
+      </details>
+
+      <hr />
+
+      <details>
+        <summary><b>Outdoor sensor settings</b></summary>
+        <div>
+          <div id="outdoor-sensor-settings-busy" aria-busy="true"></div>
+          <form action="/api/settings" id="outdoor-sensor-settings" class="hidden">
+            <fieldset>
+              <legend>Source type</legend>
+
+              <label>
+                <input type="radio" id="outdoor-sensor-type" name="sensors[outdoor][type]" value="0" />
+                From boiler via OpenTherm
+              </label>
+
+              <label>
+                <input type="radio" id="outdoor-sensor-type" name="sensors[outdoor][type]" value="1" />
+                Manual via MQTT/API
+              </label>
+
+              <label>
+                <input type="radio" id="outdoor-sensor-type" name="sensors[outdoor][type]" value="2" />
+                External (DS18B20)
+              </label>
+            </fieldset>
+
+            <label for="outdoor-sensor-gpio">
+              GPIO
+              <input type="number" inputmode="numeric" id="outdoor-sensor-gpio" name="sensors[outdoor][gpio]" min="0" max="254" step="1">
+            </label>
+
+            <label for="outdoor-sensor-offset">
+              Temp offset (calibration)
+              <input type="number" inputmode="numeric" id="outdoor-sensor-offset" name="sensors[outdoor][offset]" min="-10" max="10" step="0.01" required>
+            </label>
+
+            <button type="submit">Save</button>
+          </form>
+        </div>
+      </details>
+
+      <hr />
+
+      <details>
+        <summary><b>Indoor sensor settings</b></summary>
+        <div>
+          <div id="indoor-sensor-settings-busy" aria-busy="true"></div>
+          <form action="/api/settings" id="indoor-sensor-settings" class="hidden">
+            <fieldset>
+              <legend>Source type</legend>
+
+              <label>
+                <input type="radio" id="indoor-sensor-type" name="sensors[indoor][type]" value="1" />
+                Manual via MQTT/API
+              </label>
+
+              <label>
+                <input type="radio" id="indoor-sensor-type" name="sensors[indoor][type]" value="2" />
+                External (DS18B20)
+              </label>
+
+              <label>
+                <input type="radio" id="indoor-sensor-type" name="sensors[indoor][type]" value="3" />
+                BLE device <i>(ONLY for some ESP32 which support BLE)</i>
+              </label>
+            </fieldset>
+
+            <label for="indoor-sensor-gpio">
+              GPIO
+              <input type="number" inputmode="numeric" id="indoor-sensor-gpio" name="sensors[indoor][gpio]" min="0" max="254" step="1">
+            </label>
+
+            <div class="grid">
+              <label for="indoor-sensor-offset">
+                Temp offset (calibration)
+                <input type="number" inputmode="numeric" id="indoor-sensor-offset" name="sensors[indoor][offset]" min="-10" max="10" step="0.01" required>
+              </label>
+
+              <label for="indoor-sensor-ble-addresss">
+                BLE addresss
+                <input type="text" id="indoor-sensor-ble-addresss" name="sensors[indoor][bleAddresss]" pattern="([A-Fa-f0-9]{2}:){5}[A-Fa-f0-9]{2}">
+                <small>ONLY for some ESP32 which support BLE</small>
+              </label>
+            </div>
+
+            <button type="submit">Save</button>
+          </form>
+        </div>
+      </details>
+
+      <hr />
+
+      <details>
+        <summary><b>External pump settings</b></summary>
+        <div>
+          <div id="extpump-settings-busy" aria-busy="true"></div>
+          <form action="/api/settings" id="extpump-settings" class="hidden">
+            <fieldset>
+              <label for="extpump-use">
+                <input type="checkbox" id="extpump-use" name="externalPump[use]" value="true">
+                Use external pump
+              </label>
+            </fieldset>
+
+            <div class="grid">
+              <label for="extpump-gpio">
+                Relay GPIO
+                <input type="number" inputmode="numeric" id="extpump-gpio" name="externalPump[gpio]" min="0" max="254" step="1">
+              </label>
+
+              <label for="extpump-pc-time">
+                Post circulation time <small>(min)</small>
+                <input type="number" inputmode="numeric" id="extpump-pc-time" name="externalPump[postCirculationTime]" min="1" max="120" step="1" required>
+              </label>
+            </div>
+
+            <div class="grid">
+              <label for="extpump-as-interval">
+                Anti stuck interval <small>(days)</small>
+                <input type="number" inputmode="numeric" id="extpump-as-interval" name="externalPump[antiStuckInterval]" min="1" max="366" step="1" required>
+              </label>
+
+              <label for="extpump-as-time">
+                Anti stuck time <small>(min)</small>
+                <input type="number" inputmode="numeric" id="extpump-as-time" name="externalPump[antiStuckTime]" min="1" max="20" step="1" required>
+              </label>
+            </div>
+
+            <button type="submit">Save</button>
+          </form>
+        </div>
+      </details>
+    </article>
+  </main>
+
+  <footer class="container">
+    <small>
+      <b>Made by Laxilef</b>
+      • <a href="https://github.com/Laxilef/OTGateway/blob/master/LICENSE" target="_blank" class="secondary">License</a>
+      • <a href="https://github.com/Laxilef/OTGateway/blob/master/" target="_blank" class="secondary">Source code</a>
+      • <a href="https://github.com/Laxilef/OTGateway/wiki" target="_blank" class="secondary">Help</a>
+      • <a href="https://github.com/Laxilef/OTGateway/issues" target="_blank" class="secondary">Issue & questions</a>
+      • <a href="https://github.com/Laxilef/OTGateway/releases" target="_blank" class="secondary">Releases</a>
+    </small>
+  </footer>
+
+  <script src="/static/app.js"></script>
+  <script>
+    window.onload = async function () {
+      const fillData = (data) => {
+        // System
+        setCheckboxValue('#system-debug', data.system.debug);
+        setCheckboxValue('#system-serial-enable', data.system.serial.enable);
+        setInputValue('#system-serial-baudrate', data.system.serial.baudrate);
+        setCheckboxValue('#system-telnet-enable', data.system.telnet.enable);
+        setInputValue('#system-telnet-port', data.system.telnet.port);
+        setRadioValue('#system-unit-system', data.system.unitSystem);
+        setInputValue('#system-status-led-gpio', data.system.statusLedGpio < 255 ? data.system.statusLedGpio : '');
+        setBusy('#system-settings-busy', '#system-settings', false);
+
+        // Portal
+        setCheckboxValue('#portal-auth', data.portal.auth);
+        setInputValue('#portal-login', data.portal.login);
+        setInputValue('#portal-password', data.portal.password);
+        setBusy('#portal-settings-busy', '#portal-settings', false);
+
+        // Opentherm
+        setRadioValue('#opentherm-unit-system', data.opentherm.unitSystem);
+        setInputValue('#opentherm-in-gpio', data.opentherm.inGpio < 255 ? data.opentherm.inGpio : '');
+        setInputValue('#opentherm-out-gpio', data.opentherm.outGpio < 255 ? data.opentherm.outGpio : '');
+        setInputValue('#opentherm-rx-led-gpio', data.opentherm.rxLedGpio < 255 ? data.opentherm.rxLedGpio : '');
+        setInputValue('#opentherm-member-id-code', data.opentherm.memberIdCode);
+        setCheckboxValue('#opentherm-dhw-present', data.opentherm.dhwPresent);
+        setCheckboxValue('#opentherm-sw-mode', data.opentherm.summerWinterMode);
+        setCheckboxValue('#opentherm-heating-ch2-enabled', data.opentherm.heatingCh2Enabled);
+        setCheckboxValue('#opentherm-heating-ch1-to-ch2', data.opentherm.heatingCh1ToCh2);
+        setCheckboxValue('#opentherm-dhw-to-ch2', data.opentherm.dhwToCh2);
+        setCheckboxValue('#opentherm-dhw-blocking', data.opentherm.dhwBlocking);
+        setCheckboxValue('#opentherm-sync-modulation-with-heating', data.opentherm.modulationSyncWithHeating);
+        setCheckboxValue('#opentherm-get-min-max-temp', data.opentherm.getMinMaxTemp);
+        setBusy('#opentherm-settings-busy', '#opentherm-settings', false);
+
+        // MQTT
+        setCheckboxValue('#mqtt-enable', data.mqtt.enable);
+        setInputValue('#mqtt-server', data.mqtt.server);
+        setInputValue('#mqtt-port', data.mqtt.port);
+        setInputValue('#mqtt-user', data.mqtt.user);
+        setInputValue('#mqtt-password', data.mqtt.password);
+        setInputValue('#mqtt-prefix', data.mqtt.prefix);
+        setInputValue('#mqtt-interval', data.mqtt.interval);
+        setBusy('#mqtt-settings-busy', '#mqtt-settings', false);
+
+        // Outdoor sensor
+        setRadioValue('#outdoor-sensor-type', data.sensors.outdoor.type);
+        setInputValue('#outdoor-sensor-gpio', data.sensors.outdoor.gpio  < 255 ? data.sensors.outdoor.gpio : '');
+        setInputValue('#outdoor-sensor-offset', data.sensors.outdoor.offset);
+        setBusy('#outdoor-sensor-settings-busy', '#outdoor-sensor-settings', false);
+
+        // Indoor sensor
+        setRadioValue('#indoor-sensor-type', data.sensors.indoor.type);
+        setInputValue('#indoor-sensor-gpio', data.sensors.indoor.gpio < 255 ? data.sensors.indoor.gpio : '');
+        setInputValue('#indoor-sensor-offset', data.sensors.indoor.offset);
+        setInputValue('#indoor-sensor-ble-addresss', data.sensors.indoor.bleAddresss);
+        setBusy('#indoor-sensor-settings-busy', '#indoor-sensor-settings', false);
+
+        // Extpump
+        setCheckboxValue('#extpump-use', data.externalPump.use);
+        setInputValue('#extpump-gpio', data.externalPump.gpio < 255 ? data.externalPump.gpio : '');
+        setInputValue('#extpump-pc-time', data.externalPump.postCirculationTime);
+        setInputValue('#extpump-as-interval', data.externalPump.antiStuckInterval);
+        setInputValue('#extpump-as-time', data.externalPump.antiStuckTime);
+        setBusy('#extpump-settings-busy', '#extpump-settings', false);
+
+        // Heating
+        setInputValue('#heating-min-temp', data.heating.minTemp, {
+          "min": data.system.unitSystem == 0 ? 0 : 32,
+          "max": data.system.unitSystem == 0 ? 99 : 211
+        });
+        setInputValue('#heating-max-temp', data.heating.maxTemp, {
+          "min": data.system.unitSystem == 0 ? 1 : 33,
+          "max": data.system.unitSystem == 0 ? 100 : 212
+        });
+        setInputValue('#heating-hysteresis', data.heating.hysteresis);
+        setInputValue('#heating-max-modulation', data.heating.maxModulation);
+        setBusy('#heating-settings-busy', '#heating-settings', false);
+
+        // DHW
+        setInputValue('#dhw-min-temp', data.dhw.minTemp, {
+          "min": data.system.unitSystem == 0 ? 0 : 32,
+          "max": data.system.unitSystem == 0 ? 99 : 211
+        });
+        setInputValue('#dhw-max-temp', data.dhw.maxTemp, {
+          "min": data.system.unitSystem == 0 ? 1 : 33,
+          "max": data.system.unitSystem == 0 ? 100 : 212
+        });
+        setBusy('#dhw-settings-busy', '#dhw-settings', false);
+
+        // Emergency mode
+        setCheckboxValue('#emergency-enable', data.emergency.enable);
+        setInputValue('#emergency-treshold-time', data.emergency.tresholdTime);
+        setCheckboxValue('#emergency-use-equitherm', data.emergency.useEquitherm);
+        setCheckboxValue('#emergency-use-pid', data.emergency.usePid);
+        setCheckboxValue('#emergency-on-network-fault', data.emergency.onNetworkFault);
+        setCheckboxValue('#emergency-on-mqtt-fault', data.emergency.onMqttFault);
+        setInputValue('#emergency-target', data.emergency.target, {
+          "min": (!data.emergency.useEquitherm && !data.emergency.usePid) ? data.heating.minTemp : 10,
+          "max": (!data.emergency.useEquitherm && !data.emergency.usePid) ? data.heating.maxTemp : 30,
+        });
+        setBusy('#emergency-settings-busy', '#emergency-settings', false);
+
+        // Equitherm
+        setCheckboxValue('#equitherm-enable', data.equitherm.enable);
+        setInputValue('#equitherm-n-factor', data.equitherm.n_factor);
+        setInputValue('#equitherm-k-factor', data.equitherm.k_factor);
+        setInputValue('#equitherm-t-factor', data.equitherm.t_factor);
+        setBusy('#equitherm-settings-busy', '#equitherm-settings', false);
+
+        // PID
+        setCheckboxValue('#pid-enable', data.pid.enable);
+        setInputValue('#pid-p-factor', data.pid.p_factor);
+        setInputValue('#pid-i-factor', data.pid.i_factor);
+        setInputValue('#pid-d-factor', data.pid.d_factor);
+        setInputValue('#pid-dt', data.pid.dt);
+        setInputValue('#pid-min-temp', data.pid.minTemp, {
+          "min": 0,
+          "max": data.system.unitSystem == 0 ? 99 : 211
+        });
+        setInputValue('#pid-max-temp', data.pid.maxTemp, {
+          "min": 1,
+          "max": data.system.unitSystem == 0 ? 100 : 212
+        });
+        setBusy('#pid-settings-busy', '#pid-settings', false);
+      };
+
+      try {
+        const response = await fetch('/api/settings', { cache: 'no-cache' });
+        if (!response.ok) {
+          throw new Error('Response not valid');
+        }
+
+        const result = await response.json();
+        fillData(result);
+        setupForm('#portal-settings', fillData);
+        setupForm('#system-settings', fillData);
+        setupForm('#heating-settings', fillData);
+        setupForm('#dhw-settings', fillData);
+        setupForm('#emergency-settings', fillData);
+        setupForm('#equitherm-settings', fillData);
+        setupForm('#pid-settings', fillData);
+        setupForm('#opentherm-settings', fillData);
+        setupForm('#mqtt-settings', fillData);
+        setupForm('#outdoor-sensor-settings', fillData);
+        setupForm('#indoor-sensor-settings', fillData);
+        setupForm('#extpump-settings', fillData);
+
+      } catch (error) {
+        console.log(error);
+      }
+    };
+  </script>
+</body>
+
+</html>
--- a/src_data/static/app.css
+++ b/src_data/static/app.css
@@ -1,22 +1,47 @@
+@media (min-width: 576px) {
+  article {
+    --pico-block-spacing-vertical: calc(var(--pico-spacing) * 0.75);
+    --pico-block-spacing-horizontal: calc(var(--pico-spacing) * 0.75);
+  }
+}
+
+@media (min-width: 768px) {
+  article {
+    --pico-block-spacing-vertical: var(--pico-spacing);
+    --pico-block-spacing-horizontal: var(--pico-spacing);
+  }
+}
+
+@media (min-width: 1024px) {
+  article {
+    --pico-block-spacing-vertical: calc(var(--pico-spacing) * 1.25);
+    --pico-block-spacing-horizontal: calc(var(--pico-spacing) * 1.25);
+  }
+}
+
@media (min-width: 1280px) {
+  article {
+    --pico-block-spacing-vertical: calc(var(--pico-spacing) * 1.5);
+    --pico-block-spacing-horizontal: calc(var(--pico-spacing) * 1.5);
+  }
+
 	.container {
 		max-width: 1000px;
 	}
 }

@media (min-width: 1536px) {
+  article {
+    --pico-block-spacing-vertical: calc(var(--pico-spacing) * 1.75);
+    --pico-block-spacing-horizontal: calc(var(--pico-spacing) * 1.75);
+  }
+
 	.container {
 		max-width: 1000px;
 	}
 }

-.hidden {
-	display: none !important;
-}
-
-header,
-main,
-footer {
+header, main, footer {
 	padding-top: 1rem !important;
 	padding-bottom: 1rem !important;
 }
@@ -29,6 +54,23 @@ footer {
 	text-align: center;
 }

+nav li a:has(> div.logo) {
+	margin-bottom: 0;
+}
+
+details > div {
+	padding: 0 var(--pico-form-element-spacing-horizontal);
+}
+
+pre {
+	padding: 0.5rem;
+}
+
+
+.hidden {
+	display: none !important;
+}
+
 button.success {
 	background-color: var(--pico-form-element-valid-border-color);
 	border-color: var(--pico-form-element-valid-border-color);
@@ -75,6 +117,80 @@ tr.network:hover {
  font-family: var(--pico-font-family-monospace);
 }

-nav li a:has(> div.logo) {
-	margin-bottom: 0;
-}
+.thermostat {
+	display: grid;
+  grid-template-columns: 0.5fr 2fr 0.5fr;
+  grid-template-rows: 0.25fr 1fr 0.25fr;
+  gap: 0px 0px;
+  grid-auto-flow: row;
+  justify-content: center;
+  justify-items: center;
+  grid-template-areas:
+    ". thermostat-header ."
+    "thermostat-minus thermostat-temp thermostat-plus"
+    "thermostat-control thermostat-control thermostat-control";
+
+	border: .25rem solid var(--pico-blockquote-border-color);
+	padding: 0.5rem;
+}
+
+.thermostat-header {
+  justify-self: center;
+  align-self: end;
+  grid-area: thermostat-header;
+
+	font-size: 1rem;
+  font-weight: bold;
+  border-bottom: .25rem solid var(--pico-primary-hover-border);
+	margin: 0 0 1rem 0;
+}
+
+.thermostat-temp {
+	display: grid;
+  grid-template-columns: 1fr;
+  grid-template-rows: 1fr 0.5fr;
+  gap: 0px 0px;
+  grid-auto-flow: row;
+  grid-template-areas:
+    "thermostat-temp-target"
+    "thermostat-temp-current";
+  grid-area: thermostat-temp;
+}
+
+.thermostat-temp-target {
+  justify-self: center;
+  align-self: center;
+  grid-area: thermostat-temp-target;
+
+	font-weight: bold;
+  font-size: 1.75rem;
+}
+
+.thermostat-temp-current {
+  justify-self: center;
+  align-self: start;
+  grid-area: thermostat-temp-current;
+
+	color: var(--pico-secondary);
+  font-size: 0.85rem;
+}
+
+.thermostat-minus {
+  justify-self: end;
+  align-self: center;
+  grid-area: thermostat-minus;
+}
+
+.thermostat-plus {
+  justify-self: start;
+  align-self: center;
+  grid-area: thermostat-plus;
+}
+
+.thermostat-control {
+  justify-self: center;
+  align-self: start;
+  grid-area: thermostat-control;
+
+	margin: 1.25rem 0;
+}
--- a/src_data/static/app.js
+++ b/src_data/static/app.js
@@ -1,4 +1,4 @@
-function setupForm(formSelector) {
+function setupForm(formSelector, onResultCallback = null) {
  const form = document.querySelector(formSelector);
  if (!form) {
    return;
@@ -27,7 +27,7 @@ function setupForm(formSelector) {
      button.setAttribute('aria-busy', true);
    }

-    const onSuccess = (response) => {
+    const onSuccess = (result) => {
      if (button) {
        button.textContent = 'Saved';
        button.classList.add('success');
@@ -41,7 +41,7 @@ function setupForm(formSelector) {
      }
    };

-    const onFailed = (response) => {
+    const onFailed = () => {
      if (button) {
        button.textContent = 'Error';
        button.classList.add('failed');
@@ -71,15 +71,20 @@ function setupForm(formSelector) {
        body: form2json(fd)
      });

-      if (response.ok) {
-        onSuccess(response);
+      if (!response.ok) {
+        throw new Error('Response not valid');
+      }

-      } else {
-        onFailed(response);
+      const result = response.status != 204 ? (await response.json()) : null;
+      onSuccess(result);
+
+      if (onResultCallback instanceof Function) {
+        onResultCallback(result);
      }

    } catch (err) {
-      onFailed(false);
+      console.log(err);
+      onFailed();
    }
  });
 }
@@ -410,6 +415,9 @@ function setupUpgradeForm(formSelector) {
  form.addEventListener('submit', async (event) => {
    event.preventDefault();

+    hide('.upgrade-firmware-result');
+    hide('.upgrade-filesystem-result');
+
    if (button) {
      button.textContent = 'Uploading...';
      button.setAttribute('disabled', true);
@@ -437,157 +445,15 @@ function setupUpgradeForm(formSelector) {
  });
 }

-async function loadNetworkStatus() {
-  let response = await fetch('/api/network/status', { cache: 'no-cache' });
-  let result = await response.json();
-
-  setValue('.network-hostname', result.hostname);
-  setValue('.network-mac', result.mac);
-  setState('.network-connected', result.isConnected);
-  setValue('.network-ssid', result.ssid);
-  setValue('.network-signal', result.signalQuality);
-  setValue('.network-ip', result.ip);
-  setValue('.network-subnet', result.subnet);
-  setValue('.network-gateway', result.gateway);
-  setValue('.network-dns', result.dns);
-
-  setBusy('.main-busy', '.main-table', false);
-}
-
-async function loadNetworkSettings() {
-  let response = await fetch('/api/network/settings', { cache: 'no-cache' });
-  let result = await response.json();
-
-  setInputValue('.network-hostname', result.hostname);
-  setCheckboxValue('.network-use-dhcp', result.useDhcp);
-  setInputValue('.network-static-ip', result.staticConfig.ip);
-  setInputValue('.network-static-gateway', result.staticConfig.gateway);
-  setInputValue('.network-static-subnet', result.staticConfig.subnet);
-  setInputValue('.network-static-dns', result.staticConfig.dns);
-  setBusy('#network-settings-busy', '#network-settings', false);
-
-  setInputValue('.sta-ssid', result.sta.ssid);
-  setInputValue('.sta-password', result.sta.password);
-  setInputValue('.sta-channel', result.sta.channel);
-  setBusy('#sta-settings-busy', '#sta-settings', false);
-
-  setInputValue('.ap-ssid', result.ap.ssid);
-  setInputValue('.ap-password', result.ap.password);
-  setInputValue('.ap-channel', result.ap.channel);
-  setBusy('#ap-settings-busy', '#ap-settings', false);
-}
-
-async function loadSettings() {
-  let response = await fetch('/api/settings', { cache: 'no-cache' });
-  let result = await response.json();
-
-  setCheckboxValue('.system-debug', result.system.debug);
-  setCheckboxValue('.system-use-serial', result.system.useSerial);
-  setCheckboxValue('.system-use-telnet', result.system.useTelnet);
-  setBusy('#system-settings-busy', '#system-settings', false);
-
-  setCheckboxValue('.portal-use-auth', result.portal.useAuth);
-  setInputValue('.portal-login', result.portal.login);
-  setInputValue('.portal-password', result.portal.password);
-  setBusy('#portal-settings-busy', '#portal-settings', false);
-
-  setInputValue('.opentherm-in-gpio', result.opentherm.inGpio < 255 ? result.opentherm.inGpio : '');
-  setInputValue('.opentherm-out-gpio', result.opentherm.outGpio < 255 ? result.opentherm.outGpio : '');
-  setInputValue('.opentherm-member-id-code', result.opentherm.memberIdCode);
-  setCheckboxValue('.opentherm-dhw-present', result.opentherm.dhwPresent);
-  setCheckboxValue('.opentherm-sw-mode', result.opentherm.summerWinterMode);
-  setCheckboxValue('.opentherm-heating-ch2-enabled', result.opentherm.heatingCh2Enabled);
-  setCheckboxValue('.opentherm-heating-ch1-to-ch2', result.opentherm.heatingCh1ToCh2);
-  setCheckboxValue('.opentherm-dhw-to-ch2', result.opentherm.dhwToCh2);
-  setCheckboxValue('.opentherm-dhw-blocking', result.opentherm.dhwBlocking);
-  setCheckboxValue('.opentherm-sync-modulation-with-heating', result.opentherm.modulationSyncWithHeating);
-  setBusy('#opentherm-settings-busy', '#opentherm-settings', false);
-
-  setInputValue('.mqtt-server', result.mqtt.server);
-  setInputValue('.mqtt-port', result.mqtt.port);
-  setInputValue('.mqtt-user', result.mqtt.user);
-  setInputValue('.mqtt-password', result.mqtt.password);
-  setInputValue('.mqtt-prefix', result.mqtt.prefix);
-  setInputValue('.mqtt-interval', result.mqtt.interval);
-  setBusy('#mqtt-settings-busy', '#mqtt-settings', false);
-
-  setRadioValue('.outdoor-sensor-type', result.sensors.outdoor.type);
-  setInputValue('.outdoor-sensor-gpio', result.sensors.outdoor.gpio  < 255 ? result.sensors.outdoor.gpio : '');
-  setInputValue('.outdoor-sensor-offset', result.sensors.outdoor.offset);
-  setBusy('#outdoor-sensor-settings-busy', '#outdoor-sensor-settings', false);
-
-  setRadioValue('.indoor-sensor-type', result.sensors.indoor.type);
-  setInputValue('.indoor-sensor-gpio', result.sensors.indoor.gpio < 255 ? result.sensors.indoor.gpio : '');
-  setInputValue('.indoor-sensor-offset', result.sensors.indoor.offset);
-  setInputValue('.indoor-sensor-ble-addresss', result.sensors.indoor.bleAddresss);
-  setBusy('#indoor-sensor-settings-busy', '#indoor-sensor-settings', false);
-
-  setCheckboxValue('.extpump-use', result.externalPump.use);
-  setInputValue('.extpump-gpio', result.externalPump.gpio < 255 ? result.externalPump.gpio : '');
-  setInputValue('.extpump-pc-time', result.externalPump.postCirculationTime);
-  setInputValue('.extpump-as-interval', result.externalPump.antiStuckInterval);
-  setInputValue('.extpump-as-time', result.externalPump.antiStuckTime);
-  setBusy('#extpump-settings-busy', '#extpump-settings', false);
-}
-
-async function loadVars() {
-  let response = await fetch('/api/vars');
-  let result = await response.json();
-
-  setState('.ot-connected', result.states.otStatus);
-  setState('.ot-emergency', result.states.emergency);
-  setState('.ot-heating', result.states.heating);
-  setState('.ot-dhw', result.states.dhw);
-  setState('.ot-flame', result.states.flame);
-  setState('.ot-fault', result.states.fault);
-  setState('.ot-diagnostic', result.states.diagnostic);
-  setState('.ot-external-pump', result.states.externalPump);
-
-  setValue('.ot-modulation', result.sensors.modulation);
-  setValue('.ot-pressure', result.sensors.pressure);
-  setValue('.ot-dhw-flow-rate', result.sensors.dhwFlowRate);
-  setValue('.ot-fault-code', result.sensors.faultCode ? ("E" + result.sensors.faultCode) : "-");
-
-  setValue('.indoor-temp', result.temperatures.indoor);
-  setValue('.outdoor-temp', result.temperatures.outdoor);
-  setValue('.heating-temp', result.temperatures.heating);
-  setValue('.heating-setpoint-temp', result.parameters.heatingSetpoint);
-  setValue('.dhw-temp', result.temperatures.dhw);
-
-  setBusy('.ot-busy', '.ot-table', false);
-
-  setValue('.version', result.system.version);
-  setValue('.build-date', result.system.buildDate);
-  setValue('.uptime', result.system.uptime);
-  setValue('.uptime-days', Math.floor(result.system.uptime / 86400));
-  setValue('.uptime-hours', Math.floor(result.system.uptime % 86400 / 3600));
-  setValue('.uptime-min', Math.floor(result.system.uptime % 3600 / 60));
-  setValue('.uptime-sec', Math.floor(result.system.uptime % 60));
-  setValue('.total-heap', result.system.totalHeap);
-  setValue('.free-heap', result.system.freeHeap);
-  setValue('.min-free-heap', result.system.minFreeHeap);
-  setValue('.max-free-block-heap', result.system.maxFreeBlockHeap);
-  setValue('.min-max-free-block-heap', result.system.minMaxFreeBlockHeap);
-  setValue('.reset-reason', result.system.resetReason);
-  setState('.mqtt-connected', result.system.mqttConnected);
-
-  setBusy('.system-busy', '.system-table', false);
-}

 function setBusy(busySelector, contentSelector, value) {
-  let busy = document.querySelector(busySelector);
-  let content = document.querySelector(contentSelector);
-  if (!busy || !content) {
-    return;
-  }
-
  if (!value) {
-    busy.classList.add('hidden');
-    content.classList.remove('hidden');
+    hide(busySelector);
+    show(contentSelector);

  } else {
-    busy.classList.remove('hidden');
-    content.classList.add('hidden');
+    show(busySelector);
+    hide(contentSelector);
  }
 }

@@ -601,12 +467,14 @@ function setState(selector, value) {
 }

 function setValue(selector, value) {
-  let item = document.querySelector(selector);
-  if (!item) {
+  let items = document.querySelectorAll(selector);
+  if (!items.length) {
    return;
  }

-  item.innerHTML = value;
+  for (let item of items) {
+    item.innerHTML = value;
+  }
 }

 function setCheckboxValue(selector, value) {
@@ -629,15 +497,106 @@ function setRadioValue(selector, value) {
  }
 }

-function setInputValue(selector, value) {
-  let item = document.querySelector(selector);
-  if (!item) {
+function setInputValue(selector, value, attrs = {}) {
+  let items = document.querySelectorAll(selector);
+  if (!items.length) {
    return;
  }

-  item.value = value;
+  for (let item of items) {
+    item.value = value;
+
+    if (attrs instanceof Object) {
+      for (let attrKey of Object.keys(attrs)) {
+        item.setAttribute(attrKey, attrs[attrKey]);
+      }
+    }
+  }
 }

+function show(selector) {
+  let items = document.querySelectorAll(selector);
+  if (!items.length) {
+    return;
+  }
+
+  for (let item of items) {
+    if (item.classList.contains('hidden')) {
+      item.classList.remove('hidden');
+    }
+  }
+}
+
+function hide(selector) {
+  let items = document.querySelectorAll(selector);
+  if (!items.length) {
+    return;
+  }
+
+  for (let item of items) {
+    if (!item.classList.contains('hidden')) {
+      item.classList.add('hidden');
+    }
+  }
+}
+
+function unit2str(unitSystem, units = {}, defaultValue = '?') {
+  return (unitSystem in units) 
+    ? units[unitSystem] 
+    : defaultValue;
+}
+
+function temperatureUnit(unitSystem) {
+  return unit2str(unitSystem, {
+    0: "°C",
+    1: "°F"
+  });
+}
+
+function pressureUnit(unitSystem) {
+  return unit2str(unitSystem, {
+    0: "bar",
+    1: "psi"
+  });
+}
+
+function volumeUnit(unitSystem) {
+  return unit2str(unitSystem, {
+    0: "L",
+    1: "gal"
+  });
+}
+
+function memberIdToVendor(memberId) {
+  // https://github.com/Jeroen88/EasyOpenTherm/blob/main/src/EasyOpenTherm.h
+  // https://github.com/Evgen2/SmartTherm/blob/v0.7/src/Web.cpp
+  const vendorList = {
+    1:    "Baxi Fourtech/Luna 3",
+    2:    "AWB/Brink",
+    4:    "ATAG/Brötje/ELCO/GEMINOX",
+    5:    "Itho Daalderop",
+    6:    "IDEAL",
+    8:    "Buderus/Bosch/Hoval",
+    9:    "Ferroli",
+    11:   "Remeha/De Dietrich",
+    16:   "Unical",
+    24:   "Vaillant/Bulex",
+    27:   "Baxi",
+    29:   "Itho Daalderop",
+    33:   "Viessmann",
+    41:   "Italtherm",
+    56:   "Baxi Luna Duo-Tec",
+    131:  "Nefit",
+    148:  "Navien",
+    173:  "Intergas",
+    247:  "Baxi Ampera",
+    248:  "Zota Lux-X"
+  };
+  
+  return (memberId in vendorList) 
+    ? vendorList[memberId] 
+    : "unknown vendor";
+}

 function form2json(data) {
  let method = function (object, pair) {
--- a/src_data/static/pico.min.css
+++ b/src_data/static/pico.min.css
--- a/src_data/upgrade.html
+++ b/src_data/upgrade.html
@@ -36,7 +36,7 @@
            Settings file:
            <input type="file" name="settings" id="restore-file" accept=".json">
          </label>
-          
+
          <div class="grid">
            <button type="submit">Restore</button>
            <button type="button" class="secondary" onclick="window.location='/api/backup/save';">Backup</button>
@@ -50,7 +50,7 @@
        <hgroup>
          <h2>Upgrade</h2>
          <p>
-            In this section you can upgrade the firmware and filesystem of your device.<br>
+            In this section you can upgrade the firmware and filesystem of your device.<br />
            Latest releases can be downloaded from the <a href="https://github.com/Laxilef/OTGateway/releases" target="_blank">Releases page</a> of the project repository.
          </p>
        </hgroup>
@@ -64,7 +64,7 @@
                <button type="button" class="upgrade-firmware-result hidden" disabled></button>
              </div>
            </label>
-          
+
            <label for="filesystem-file">
              Filesystem:
              <div class="grid">
@@ -73,7 +73,7 @@
              </div>
            </label>
          </fieldset>
-          
+
          <ul>
            <li><mark>After a successful upgrade the filesystem, ALL settings will be reset to default values! Save backup before upgrading.</mark></li>
            <li><mark>After a successful upgrade, the device will automatically reboot after 10 seconds.</mark></li>
--- a/tools/build.py
+++ b/tools/build.py
@@ -1,4 +1,5 @@
 import shutil
+import gzip
 import os
 Import("env")

@@ -12,6 +13,23 @@ def post_build(source, target, env):
  env.Execute("pio run --target buildfs --environment %s" % env["PIOENV"]);


+def before_buildfs(source, target, env):
+  src = os.path.join(env["PROJECT_DIR"], "src_data")
+  dst = os.path.join(env["PROJECT_DIR"], "data")
+
+  for root, dirs, files in os.walk(src, topdown=False):
+    for name in files:
+      src_path = os.path.join(root, name)
+
+      with open(src_path, 'rb') as f_in:
+          dst_name = name + ".gz"
+          dst_path = os.path.join(dst, os.path.relpath(root, src), dst_name)
+
+          with gzip.open(dst_path, 'wb', 9) as f_out:
+            shutil.copyfileobj(f_in, f_out)
+          
+          print("Compressed '%s' to '%s'" % (src_path, dst_path))
+
 def after_buildfs(source, target, env):
  copy_to_build_dir({
    source[0].get_abspath(): "filesystem_%s_%s.bin" % (env["PIOENV"], env.GetProjectOption("version")),
@@ -31,4 +49,6 @@ def copy_to_build_dir(files, build_dir):


 env.AddPostAction("buildprog", post_build)
+env.AddPreAction("$BUILD_DIR/spiffs.bin", before_buildfs)
+env.AddPreAction("$BUILD_DIR/littlefs.bin", before_buildfs)
 env.AddPostAction("buildfs", after_buildfs)
Author	SHA1	Message	Date
Yurii	f4a4afeb29	chore: bump version	2024-04-12 20:47:02 +03:00
Yurii	f9824337dc	chore: delete .gz files	2024-04-12 20:39:56 +03:00
Yurii	1cd8c6a336	chore: html files moved to src_data dir; compression files	2024-04-12 04:13:44 +03:00
Yurii	63228baebd	chore: auto file compression when building a FS	2024-04-12 04:10:55 +03:00
Yurii	6bb261dfd7	feat: ability to use compressed files for StaticPage	2024-04-12 04:08:28 +03:00
Yurii	a026a962f0	fix: fixed thermostat temperature limits for different unit systems on dashboard	2024-04-12 02:03:43 +03:00
Yurii	db2faad741	feat: added Italtherm to vendor list	2024-04-12 01:58:33 +03:00
Yurii	fbc43dc535	feat: added settings for status led gpio, opentherm rx led gpio, emergency treshold time	2024-04-11 23:53:15 +03:00
Yurii	31dfc21d69	refactor: added info for emergency mode in settings	2024-04-11 04:38:12 +03:00
Yurii	96289cb0f7	fix: reset onewire before begin (fix DS18B20)	2024-04-11 04:09:11 +03:00
Yurii	73da3ee07a	fix: fixing button groups on the mobile version	2024-04-11 03:13:39 +03:00
Yurii	a14281924f	chore: bump version	2024-04-11 03:08:35 +03:00
Yurii	3dec390cce	feat: many features * added dashboard on portal * added settings for serial port and telnet * added on/off settings for mqtt * added event selection for emergency mode * refactor html & css	2024-04-11 03:06:56 +03:00
Yurii	9a29819d4f	refactor: reworked layout and styles of the portal	2024-04-08 05:37:36 +03:00
Yurii	2af159d566	chore: updated css framework	2024-04-07 23:00:22 +03:00
Yurii	92ca257d32	feat: added slave parameters to index page on portal; added poll ID125 (opentherm protocol version)	2024-04-07 22:59:43 +03:00
Yurii	44b6620431	fix: rounding the DHW flow rate value	2024-04-07 19:22:15 +03:00
Yurii	b89f61ed58	chore: bump version	2024-04-06 20:28:41 +03:00
Yurii	ab1566bd45	fix: memory leak on esp32 fixed	2024-04-06 20:28:05 +03:00
Yurii	86734ab622	refactor: update portal (unit system)	2024-04-06 18:25:30 +03:00
Yurii	0a8dd2a076	feat: added support unit systems for pressure and flow rate	2024-04-06 18:19:06 +03:00
Yurii	a7a561622e	Merge branch 'unit-system'	2024-04-06 17:38:24 +03:00
Yurii	b0e0f6fd7d	feat: added setting to enable/disable polling of min and max temperatures via opentherm	2024-04-06 15:51:49 +03:00
Yurii	53eaa1d7f1	chore: bump version	2024-04-04 21:26:48 +03:00
Yurii	a7d796e0cc	refactor: removed unused methods, replaced some methods to native	2024-03-31 22:29:53 +03:00
Yurii	4490b38130	fix: fixed reading exhaust gas temperature	2024-03-31 19:41:33 +03:00
Yurii	0ede2240a2	fix: temperature_unit for climate fixed; temp in vars.parameters.* by default fixed	2024-03-31 07:29:32 +03:00
Yurii	0cff35ee12	feat: update portal for unit systems	2024-03-31 06:32:23 +03:00
Yurii	14aef20234	fix: typo for HA_TEMPERATURE_UNIT	2024-03-31 02:49:36 +03:00
Yurii	560f8fbd51	feat: optimizing with different unit systems	2024-03-31 02:47:20 +03:00
Yurii	946414ad31	Merge branch 'master' into unit-system	2024-03-31 01:02:59 +03:00
Yurii	39a29042e1	fix: set max temp (ID57) as setpoint heating temp	2024-03-31 00:37:18 +03:00
Yurii	f544f01caa	feat: polling of exhaust gas temperature (#42 ) and heating return temperature; added new sensors to HA	2024-03-30 00:04:51 +03:00
Yurii	41cca76bfa	chore: update README	2024-03-24 20:38:02 +03:00
Yurii	942bc53043	chore: bump version	2024-03-24 19:28:26 +03:00
Yurii	1bad689b6b	fix: revert board_build.ldscript for esp8266, update OpenTherm Library	2024-03-24 19:27:16 +03:00
Yurii	2f4dbcc205	feat: added unit system selection	2024-03-20 02:37:20 +03:00