Merge pull request #58 from egrekov:master

Change boiler wwtemp via MQTT

README.md

@@ -240,6 +240,7 @@ These incoming MQTT topics are also handled:
 | thermostat_cmd_temp | TOPIC_THERMOSTAT_CMD_TEMP | temperature as a float | sets the thermostat current setpoint     |
 | thermostat_cmd_mode | TOPIC_THERMOSTAT_CMD_MODE | auto, day, night       | sets the thermostat mode                 |
 | wwactivated         | TOPIC_BOILER_WWACTIVATED  | 0 or 1                 | turns boiler warm water on/off (not tap) |
+| boiler_cmd_wwtemp   | TOPIC_BOILER_CMD_WWTEMP   | temperature as a float | sets the boiler wwtemp current setpoint  |
 
 If MQTT is not used use 'set mqtt_host' to remove it.
 

doc/home_assistant/climate.yaml

@@ -18,3 +18,13 @@
 
    temp_step: 0.5
 
+ - platform: mqtt
+   name: boiler
+   min_temp: 40
+   max_temp: 60
+   temp_step: 1
+   current_temperature_topic: "home/ems-esp/boiler_data"
+   temperature_state_topic: "home/ems-esp/boiler_data"
+   temperature_command_topic: "home/ems-esp/boiler_cmd_wwtemp"
+   current_temperature_template: "{{ value_json.wWCurTmp }}"
+   temperature_state_template: "{{ value_json.wWSelTemp }}"

doc/home_assistant/ui-lovelace.yaml

@@ -57,3 +57,6 @@ views:
             - sensor.dark_sky_temperature
         - type: thermostat
           entity: climate.thermostat
+        - type: thermostat
+          name: WarmWater
+          entity: climate.boiler

src/ems-esp.ino

@@ -845,6 +845,7 @@ void MQTTCallback(unsigned int type, const char * topic, const char * message) {
         myESP.mqttSubscribe(TOPIC_THERMOSTAT_CMD_TEMP);
         myESP.mqttSubscribe(TOPIC_THERMOSTAT_CMD_MODE);
         myESP.mqttSubscribe(TOPIC_BOILER_WWACTIVATED);
+        myESP.mqttSubscribe(TOPIC_BOILER_CMD_WWTEMP);
         myESP.mqttSubscribe(TOPIC_SHOWER_TIMER);
         myESP.mqttSubscribe(TOPIC_SHOWER_ALERT);
         myESP.mqttSubscribe(TOPIC_SHOWER_COLDSHOT);
@@ -897,6 +898,15 @@ void MQTTCallback(unsigned int type, const char * topic, const char * message) {
             }
         }
 		
+        // boiler wwtemp changes
+        if (strcmp(topic, TOPIC_BOILER_CMD_WWTEMP) == 0) {
+            float f     = strtof((char *)message, 0);
+            char  s[10] = {0};
+            myDebug("MQTT topic: boiler warm water temperature value %s", _float_to_char(s, f));
+            ems_setWarmWaterTemp(f);
+            publishValues(true); // publish back immediately
+        }
+
         // shower timer
         if (strcmp(topic, TOPIC_SHOWER_TIMER) == 0) {
             if (message[0] == '1') {

src/my_config.h

@@ -35,6 +35,7 @@
 #define TOPIC_BOILER_TAPWATER_ACTIVE "tapwater_active" // if hot tap water is running
 #define TOPIC_BOILER_HEATING_ACTIVE "heating_active"   // if heating is on
 #define TOPIC_BOILER_WWACTIVATED "wwactivated"         // for receiving MQTT message to change water on/off
+#define TOPIC_BOILER_CMD_WWTEMP "boiler_cmd_wwtemp"    // for received boiler wwtemp changes via MQTT
 
 // shower time
 #define TOPIC_SHOWERTIME "showertime"           // for sending shower time results