added DHW flow rate from OT

src/HaHelper.h

@@ -940,6 +940,23 @@ public:
     return publish(getTopic("sensor", "pressure").c_str(), doc);
   }
 
+  bool publishSensorDhwFlowRate(bool enabledByDefault = true) {
+    StaticJsonDocument<1024> doc;
+    doc[FPSTR(HA_AVAILABILITY)][FPSTR(HA_TOPIC)] = devicePrefix + F("/status");
+    doc[FPSTR(HA_ENABLED_BY_DEFAULT)] = enabledByDefault;
+    doc[FPSTR(HA_UNIQUE_ID)] = devicePrefix + F("_dhw_flow_rate");
+    doc[FPSTR(HA_OBJECT_ID)] = devicePrefix + F("_dhw_flow_rate");
+    doc[FPSTR(HA_ENTITY_CATEGORY)] = F("diagnostic");
+    doc[FPSTR(HA_STATE_CLASS)] = F("measurement");
+    doc[FPSTR(HA_UNIT_OF_MEASUREMENT)] = F("L/min");
+    doc[FPSTR(HA_NAME)] = F("DHW flow rate");
+    doc[FPSTR(HA_ICON)] = F("mdi:water-pump");
+    doc[FPSTR(HA_STATE_TOPIC)] = devicePrefix + F("/state");
+    doc[FPSTR(HA_VALUE_TEMPLATE)] = F("{{ value_json.sensors.dhwFlowRate|float(0)|round(2) }}");
+
+    return publish(getTopic("sensor", "dhw_flow_rate").c_str(), doc);
+  }
+
 
   bool publishNumberIndoorTemp(bool enabledByDefault = true) {
     StaticJsonDocument<1536> doc;
@@ -1234,6 +1251,10 @@ public:
     return publish(getTopic("number", "dhw_target").c_str());
   }
 
+  bool deleteSensorDhwFlowRate() {
+    return publish(getTopic("sensor", "dhw_flow_rate").c_str());
+  }
+
   bool deleteClimateDHW() {
     return publish(getTopic("climate", "dhw", "_").c_str());
   }

src/MqttTask.h

@@ -467,6 +467,7 @@ protected:
         haHelper.publishNumberDHWMaxTemp(false);
         haHelper.publishBinSensorDHW();
         haHelper.publishSensorDHWTemp();
+        haHelper.publishSensorDhwFlowRate(false);
 
       } else {
         haHelper.deleteSwitchDHW();
@@ -478,6 +479,7 @@ protected:
         haHelper.deleteSensorDHWTemp();
         haHelper.deleteNumberDHWTarget();
         haHelper.deleteClimateDHW();
+        haHelper.deleteSensorDhwFlowRate();
       }
 
       published = true;
@@ -601,6 +603,7 @@ protected:
 
     doc["sensors"]["modulation"] = vars.sensors.modulation;
     doc["sensors"]["pressure"] = vars.sensors.pressure;
+    doc["sensors"]["dhwFlowRate"] = vars.sensors.dhwFlowRate;
 
     doc["temperatures"]["indoor"] = vars.temperatures.indoor;
     doc["temperatures"]["outdoor"] = vars.temperatures.outdoor;

src/OpenThermTask.h

@@ -57,7 +57,7 @@ protected:
     bool heatingCh2Enabled = settings.opentherm.heatingCh2Enabled;
     if (settings.opentherm.heatingCh1ToCh2) {
       heatingCh2Enabled = heatingEnabled;
-      
+
     } else if (settings.opentherm.dhwToCh2) {
       heatingCh2Enabled = settings.opentherm.dhwPresent && settings.dhw.enable;
     }
@@ -180,8 +180,10 @@ protected:
 
     if (settings.opentherm.dhwPresent) {
       updateDHWTemp();
+      updateDHWFlowRate();
     } else {
       vars.temperatures.dhw = 0;
+      vars.sensors.dhwFlowRate = 0.0f;
     }
 
     updateHeatingTemp();
@@ -509,6 +511,16 @@ protected:
     return true;
   }
 
+  bool updateDHWFlowRate() {
+    unsigned long response = ot->sendRequest(ot->buildRequest(OpenThermMessageType::READ, OpenThermMessageID::DHWFlowRate, 0));
+    if (!ot->isValidResponse(response)) {
+      return false;
+    }
+
+    vars.sensors.dhwFlowRate = ot->getFloat(response);
+    return true;
+  }
+
   bool updateFaultCode() {
     unsigned long response = ot->sendRequest(ot->buildRequest(OpenThermRequestType::READ, OpenThermMessageID::ASFflags, 0));
 

src/Settings.h

@@ -101,6 +101,7 @@ struct Variables {
   struct {
     float modulation = 0.0f;
     float pressure = 0.0f;
+    float dhwFlowRate = 0.0f;
   } sensors;
 
   struct {