diff --git a/platformio.ini b/platformio.ini
index ba95843..755f217 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -20,7 +20,7 @@ lib_deps =
 	gyverlibs/GyverPID@^3.3
 	gyverlibs/GyverBlinker@^1.0
 	milesburton/DallasTemperature@^3.11.0
-	laxilef/TinyLogger@^1.0.3
+	laxilef/TinyLogger@^1.0.4
 	https://github.com/Laxilef/WiFiManager/archive/refs/heads/patch-1.zip
 	;https://github.com/tzapu/WiFiManager.git#v2.0.16-rc.2
 build_flags = -D PIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH -mtext-section-literals
diff --git a/src/MainTask.h b/src/MainTask.h
index 3ca854d..4cc70d1 100644
--- a/src/MainTask.h
+++ b/src/MainTask.h
@@ -47,7 +47,7 @@ protected:
 
   void loop() {
     if (eeSettings.tick()) {
-      Log.sinfoln("MAIN", PSTR("Settings updated (EEPROM)"));
+      Log.sinfoln("MAIN", F("Settings updated (EEPROM)"));
     }
 
     #if USE_TELNET
@@ -55,7 +55,7 @@ protected:
     #endif
 
     if (vars.actions.restart) {
-      Log.sinfoln("MAIN", PSTR("Restart signal received. Restart after 10 sec."));
+      Log.sinfoln("MAIN", F("Restart signal received. Restart after 10 sec."));
       eeSettings.updateNow();
       restartSignalTime = millis();
       vars.actions.restart = false;
@@ -92,7 +92,7 @@ protected:
 
         if (millis() - firstFailConnect > EMERGENCY_TIME_TRESHOLD) {
           vars.states.emergency = true;
-          Log.sinfoln("MAIN", PSTR("Emergency mode enabled"));
+          Log.sinfoln("MAIN", F("Emergency mode enabled"));
         }
       }
     }
@@ -137,7 +137,7 @@ protected:
     }
 
     if (millis() - lastHeapInfo > 60000 || minFreeHeapSizeDiff > 0) {
-      Log.sverboseln("MAIN", PSTR("Free heap size: %u of %u bytes, min: %u bytes (diff: %u bytes)"), freeHeapSize, heapSize, minFreeHeapSize, minFreeHeapSizeDiff);
+      Log.sverboseln("MAIN", F("Free heap size: %u of %u bytes, min: %u bytes (diff: %u bytes)"), freeHeapSize, heapSize, minFreeHeapSize, minFreeHeapSizeDiff);
       lastHeapInfo = millis();
     }
   }
diff --git a/src/MqttTask.h b/src/MqttTask.h
index f5e4f6b..d3fd4ca 100644
--- a/src/MqttTask.h
+++ b/src/MqttTask.h
@@ -24,7 +24,7 @@ protected:
   }
 
   void setup() {
-    Log.sinfoln("MQTT", PSTR("Started"));
+    Log.sinfoln("MQTT", F("Started"));
 
     client.setCallback(__callback);
     client.setBufferSize(1024);
@@ -39,11 +39,11 @@ protected:
 
   void loop() {
     if (!client.connected() && millis() - lastReconnectAttempt >= MQTT_RECONNECT_INTERVAL) {
-      Log.sinfoln("MQTT", PSTR("Not connected, state: %i, connecting to server %s..."), client.state(), settings.mqtt.server);
+      Log.sinfoln("MQTT", F("Not connected, state: %i, connecting to server %s..."), client.state(), settings.mqtt.server);
 
       client.setServer(settings.mqtt.server, settings.mqtt.port);
       if (client.connect(settings.hostname, settings.mqtt.user, settings.mqtt.password)) {
-        Log.sinfoln("MQTT", PSTR("Connected"));
+        Log.sinfoln("MQTT", F("Connected"));
 
         client.subscribe(getTopicPath("settings/set").c_str());
         client.subscribe(getTopicPath("state/set").c_str());
@@ -54,7 +54,7 @@ protected:
         lastReconnectAttempt = 0;
 
       } else {
-        Log.swarningln("MQTT", PSTR("Failed to connect to server"));
+        Log.swarningln("MQTT", F("Failed to connect to server"));
 
         if (settings.emergency.enable && !vars.states.emergency) {
           if (firstFailConnect == 0) {
@@ -63,7 +63,7 @@ protected:
 
           if (millis() - firstFailConnect > EMERGENCY_TIME_TRESHOLD) {
             vars.states.emergency = true;
-            Log.sinfoln("MQTT", PSTR("Emergency mode enabled"));
+            Log.sinfoln("MQTT", F("Emergency mode enabled"));
           }
         }
 
@@ -76,7 +76,7 @@ protected:
       if (vars.states.emergency) {
         vars.states.emergency = false;
 
-        Log.sinfoln("MQTT", PSTR("Emergency mode disabled"));
+        Log.sinfoln("MQTT", F("Emergency mode disabled"));
       }
 
       client.loop();
@@ -630,16 +630,16 @@ protected:
     }
 
     if (settings.debug) {
-      Log.strace("MQTT.MSG", PSTR("Topic: %s\r\n>  "), topic);
+      Log.strace("MQTT.MSG", F("Topic: %s\r\n>  "), topic);
       for (unsigned int i = 0; i < length; i++) {
         if ( payload[i] == 10 ) {
-          Log.print(PSTR("\r\n>  "));
+          Log.print("\r\n>  ");
 
         } else {
           Log.print((char) payload[i]);
         }
       }
-      Log.print(PSTR("\r\n\n"));
+      Log.print("\r\n\n");
       
       for (Stream* stream : Log.getStreams()) {
         stream->flush();
@@ -654,22 +654,22 @@ protected:
         case DeserializationError::EmptyInput:
         case DeserializationError::IncompleteInput:
         case DeserializationError::InvalidInput:
-          errMsg = PSTR("invalid input");
+          errMsg = "invalid input";
           break;
 
         case DeserializationError::NoMemory:
-          errMsg = PSTR("no memory");
+          errMsg = "no memory";
           break;
 
         case DeserializationError::TooDeep:
-          errMsg = PSTR("too deep");
+          errMsg = "too deep";
           break;
         
         default:
-          errMsg = PSTR("failed");
+          errMsg = "failed";
           break;
       }
-      Log.swarningln("MQTT.MSG", PSTR("No deserialization: %s"), errMsg);
+      Log.swarningln("MQTT.MSG", F("No deserialization: %s"), errMsg);
 
       return;
     }
diff --git a/src/RegulatorTask.h b/src/RegulatorTask.h
index 0915870..dee0a4d 100644
--- a/src/RegulatorTask.h
+++ b/src/RegulatorTask.h
@@ -34,7 +34,7 @@ protected:
       if (settings.heating.turbo) {
         settings.heating.turbo = false;
 
-        Log.sinfoln("REGULATOR", PSTR("Turbo mode auto disabled"));
+        Log.sinfoln("REGULATOR", F("Turbo mode auto disabled"));
       }
 
       newTemp = getEmergencyModeTemp();
@@ -44,7 +44,7 @@ protected:
         if (settings.heating.turbo) {
           settings.heating.turbo = false;
 
-          Log.sinfoln("REGULATOR", PSTR("Turbo mode auto disabled"));
+          Log.sinfoln("REGULATOR", F("Turbo mode auto disabled"));
         }
 
         newTemp = getTuningModeTemp();
@@ -58,7 +58,7 @@ protected:
         if (settings.heating.turbo && (fabs(settings.heating.target - vars.temperatures.indoor) < 1 || (settings.equitherm.enable && settings.pid.enable))) {
           settings.heating.turbo = false;
 
-          Log.sinfoln("REGULATOR", PSTR("Turbo mode auto disabled"));
+          Log.sinfoln("REGULATOR", F("Turbo mode auto disabled"));
         }
 
         newTemp = getNormalModeTemp();
@@ -87,7 +87,7 @@ protected:
         prevEtResult = etResult;
         newTemp += etResult;
 
-        Log.sinfoln("REGULATOR.EQUITHERM", PSTR("New emergency result: %u (%f)"), (int) round(etResult), etResult);
+        Log.sinfoln("REGULATOR.EQUITHERM", F("New emergency result: %u (%f)"), (int) round(etResult), etResult);
 
       } else {
         newTemp += prevEtResult;
@@ -106,11 +106,11 @@ protected:
 
     if (fabs(prevHeatingTarget - settings.heating.target) > 0.0001) {
       prevHeatingTarget = settings.heating.target;
-      Log.sinfoln("REGULATOR", PSTR("New target: %f"), settings.heating.target);
+      Log.sinfoln("REGULATOR", F("New target: %f"), settings.heating.target);
 
       if (settings.equitherm.enable && settings.pid.enable) {
         pidRegulator.integral = 0;
-        Log.sinfoln("REGULATOR.PID", PSTR("Integral sum has been reset"));
+        Log.sinfoln("REGULATOR.PID", F("Integral sum has been reset"));
       }
     }
 
@@ -122,7 +122,7 @@ protected:
         prevEtResult = etResult;
         newTemp += etResult;
 
-        Log.sinfoln("REGULATOR.EQUITHERM", PSTR("New result: %u (%f)"), (int) round(etResult), etResult);
+        Log.sinfoln("REGULATOR.EQUITHERM", F("New result: %u (%f)"), (int) round(etResult), etResult);
 
       } else {
         newTemp += prevEtResult;
@@ -140,7 +140,7 @@ protected:
         prevPidResult = pidResult;
         newTemp += pidResult;
 
-        Log.sinfoln("REGULATOR.PID", PSTR("New result: %d (%f)"), (int) round(pidResult), pidResult);
+        Log.sinfoln("REGULATOR.PID", F("New result: %d (%f)"), (int) round(pidResult), pidResult);
 
       } else {
         newTemp += prevPidResult;
@@ -169,7 +169,7 @@ protected:
       tunerInit = false;
       tunerRegulator = 0;
       tunerState = 0;
-      Log.sinfoln("REGULATOR.TUNING", PSTR("Stopped"));
+      Log.sinfoln("REGULATOR.TUNING", F("Stopped"));
     }
 
     if (!vars.tuning.enable) {
@@ -179,7 +179,7 @@ protected:
 
     if (vars.tuning.regulator == 0) {
       // @TODO дописать
-      Log.sinfoln("REGULATOR.TUNING.EQUITHERM", PSTR("Not implemented"));
+      Log.sinfoln("REGULATOR.TUNING.EQUITHERM", F("Not implemented"));
       return 0;
 
     } else if (vars.tuning.regulator == 1) {
@@ -189,7 +189,7 @@ protected:
         : settings.heating.target;
 
       if (tunerInit && pidTuner.getState() == 3) {
-        Log.sinfoln("REGULATOR.TUNING.PID", PSTR("Finished"));
+        Log.sinfoln("REGULATOR.TUNING.PID", F("Finished"));
         for (Stream* stream : Log.getStreams()) {
           pidTuner.debugText(stream);
         }
@@ -200,7 +200,7 @@ protected:
         tunerState = 0;
 
         if (pidTuner.getAccuracy() < 90) {
-          Log.swarningln("REGULATOR.TUNING.PID", PSTR("Bad result, try again..."));
+          Log.swarningln("REGULATOR.TUNING.PID", F("Bad result, try again..."));
 
         } else {
           settings.pid.p_factor = pidTuner.getPID_p();
@@ -212,7 +212,7 @@ protected:
       }
 
       if (!tunerInit) {
-        Log.sinfoln("REGULATOR.TUNING.PID", PSTR("Start..."));
+        Log.sinfoln("REGULATOR.TUNING.PID", F("Start..."));
 
         float step;
         if (vars.temperatures.indoor - vars.temperatures.outdoor > 10) {
@@ -222,7 +222,7 @@ protected:
         }
 
         float startTemp = step;
-        Log.sinfoln("REGULATOR.TUNING.PID", PSTR("Started. Start value: %f, step: %f"), startTemp, step);
+        Log.sinfoln("REGULATOR.TUNING.PID", F("Started. Start value: %f, step: %f"), startTemp, step);
         pidTuner.setParameters(NORMAL, startTemp, step, 20 * 60 * 1000, 0.15, 60 * 1000, 10000);
         tunerInit = true;
         tunerRegulator = 1;
@@ -232,7 +232,7 @@ protected:
       pidTuner.compute();
 
       if (tunerState > 0 && pidTuner.getState() != tunerState) {
-        Log.sinfoln("REGULATOR.TUNING.PID", PSTR("Log:"));
+        Log.sinfoln("REGULATOR.TUNING.PID", F("Log:"));
         for (Stream* stream : Log.getStreams()) {
           pidTuner.debugText(stream);
         }
diff --git a/src/SensorsTask.h b/src/SensorsTask.h
index ace6d6a..fcb8c64 100644
--- a/src/SensorsTask.h
+++ b/src/SensorsTask.h
@@ -63,7 +63,7 @@ protected:
       outdoorSensor->requestTemperatures();
       startOutdoorConversionTime = millis();
 
-      Log.serrorln(FPSTR(S_SENSORS_OUTDOOR), PSTR("Could not read temperature data (no response)"));
+      Log.serrorln(FPSTR(S_SENSORS_OUTDOOR), F("Could not read temperature data (no response)"));
     }
 
     if (!completed) {
@@ -72,10 +72,10 @@ protected:
 
     float rawTemp = outdoorSensor->getTempCByIndex(0);
     if (rawTemp == DEVICE_DISCONNECTED_C) {
-      Log.serrorln(FPSTR(S_SENSORS_OUTDOOR), PSTR("Could not read temperature data (not connected)"));
+      Log.serrorln(FPSTR(S_SENSORS_OUTDOOR), F("Could not read temperature data (not connected)"));
 
     } else {
-      Log.straceln(FPSTR(S_SENSORS_OUTDOOR), PSTR("Raw temp: %f"), rawTemp);
+      Log.straceln(FPSTR(S_SENSORS_OUTDOOR), F("Raw temp: %f"), rawTemp);
 
       if (emptyOutdoorTemp) {
         filteredOutdoorTemp = rawTemp;
@@ -89,7 +89,7 @@ protected:
 
       if (fabs(vars.temperatures.outdoor - filteredOutdoorTemp) > 0.099) {
         vars.temperatures.outdoor = filteredOutdoorTemp + settings.sensors.outdoor.offset;
-        Log.sinfoln(FPSTR(S_SENSORS_OUTDOOR), PSTR("New temp: %f"), filteredOutdoorTemp);
+        Log.sinfoln(FPSTR(S_SENSORS_OUTDOOR), F("New temp: %f"), filteredOutdoorTemp);
       }
     }
 
@@ -120,7 +120,7 @@ protected:
       indoorSensor->requestTemperatures();
       startIndoorConversionTime = millis();
       
-      Log.serrorln(FPSTR(S_SENSORS_INDOOR), PSTR("Could not read temperature data (no response)"));
+      Log.serrorln(FPSTR(S_SENSORS_INDOOR), F("Could not read temperature data (no response)"));
     }
 
     if (!completed) {
@@ -129,10 +129,10 @@ protected:
 
     float rawTemp = indoorSensor->getTempCByIndex(0);
     if (rawTemp == DEVICE_DISCONNECTED_C) {
-      Log.serrorln(FPSTR(S_SENSORS_INDOOR), PSTR("Could not read temperature data (not connected)"));
+      Log.serrorln(FPSTR(S_SENSORS_INDOOR), F("Could not read temperature data (not connected)"));
 
     } else {
-      Log.straceln(FPSTR(S_SENSORS_INDOOR), PSTR("Raw temp: %f"), rawTemp);
+      Log.straceln(FPSTR(S_SENSORS_INDOOR), F("Raw temp: %f"), rawTemp);
 
       if (emptyIndoorTemp) {
         filteredIndoorTemp = rawTemp;
@@ -146,7 +146,7 @@ protected:
 
       if (fabs(vars.temperatures.indoor - filteredIndoorTemp) > 0.099) {
         vars.temperatures.indoor = filteredIndoorTemp + settings.sensors.indoor.offset;
-        Log.sinfoln(FPSTR(S_SENSORS_INDOOR), PSTR("New temp: %f"), filteredIndoorTemp);
+        Log.sinfoln(FPSTR(S_SENSORS_INDOOR), F("New temp: %f"), filteredIndoorTemp);
       }
     }
 
diff --git a/src/main.cpp b/src/main.cpp
index 6f67fc7..eeded47 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -57,20 +57,20 @@ void setup() {
   EEPROM.begin(eeSettings.blockSize());
   uint8_t eeSettingsResult = eeSettings.begin(0, 's');
   if (eeSettingsResult == 0) {
-    Log.sinfoln("MAIN", PSTR("Settings loaded"));
+    Log.sinfoln("MAIN", F("Settings loaded"));
 
     if (strcmp(SETTINGS_VALID_VALUE, settings.validationValue) != 0) {
-      Log.swarningln("MAIN", PSTR("Settings not valid, reset and restart..."));
+      Log.swarningln("MAIN", F("Settings not valid, reset and restart..."));
       eeSettings.reset();
       delay(1000);
       ESP.restart();
     }
 
   } else if (eeSettingsResult == 1) {
-    Log.sinfoln("MAIN", PSTR("Settings NOT loaded, first start"));
+    Log.sinfoln("MAIN", F("Settings NOT loaded, first start"));
 
   } else if (eeSettingsResult == 2) {
-    Log.serrorln("MAIN", PSTR("Settings NOT loaded (error)"));
+    Log.serrorln("MAIN", F("Settings NOT loaded (error)"));
   }
 
   Log.setLevel(settings.debug ? TinyLogger::Level::VERBOSE : TinyLogger::Level::INFO);