Add support for turn On/Off Ecodan from HA

ecodan-ha-local/ehal_hp.cpp

@@ -385,6 +385,25 @@ namespace ehal::hp
  return true;
  }
 
+ bool set_power_mode(bool on)
+ {
+ Message cmd{MsgType::SET_CMD, SetType::BASIC_SETTINGS};
+ cmd[1] = SET_SETTINGS_FLAG_SYSTEM_MODE_POWER;
+ cmd[3] = on ? 1 : 0;
+ {
+ std::lock_guard<std::mutex>{cmdQueueMutex};
+ cmdQueue.emplace(std::move(cmd));
+ }
+
+ if (!dispatch_next_cmd())
+ {
+ log_web(F("command dispatch failed for DHW force setting!"));
+ return false;
+ }
+
+ return true;
+ }
+
  bool set_hp_mode(uint8_t mode)
  {
  Message cmd{MsgType::SET_CMD, SetType::BASIC_SETTINGS};

ecodan-ha-local/ehal_hp.h

@@ -246,6 +246,7 @@ namespace ehal::hp
  bool set_dhw_target_temperature(float value);
  bool set_dhw_mode(String mode);
  bool set_dhw_force(bool on);
+ bool set_power_mode(bool on);
  bool set_hp_mode(uint8_t mode);
 
  bool begin_connect();

ecodan-ha-local/ehal_mqtt.cpp

@@ -244,6 +244,21 @@ off
  }
  }
 
+ void on_turn_on_off_command(const String& payload) 
+ {
+ bool turnON = payload == "ON";
+ if (!hp::set_power_mode(turnON))
+ {
+ log_web(F("Failed to set power mode!"));
+ }
+ else
+ {
+ auto& status = hp::get_status();
+ std::lock_guard<hp::Status> lock{status};
+ publish_sensor_status<String>(F("mode_power"), status.power_as_string());
+ }
+ }
+
  void mqtt_callback(String& topic, String& payload)
  {
  try
@@ -252,6 +267,7 @@ off
  String climateEntity = unique_entity_name(F("climate_control"));
  String tempCmdTopic = config.MqttTopic + "/" + climateEntity + F("/temp_cmd");
  String dhwForceCmdTopic = config.MqttTopic + "/" + unique_entity_name(F("force_dhw")) + F("/set");
+ String turnOnOffCmdTopic = config.MqttTopic + "/" + unique_entity_name(F("turn_on_off_hp")) + F("/set");
  String dhwTempCmdTopic = config.MqttTopic + "/" + unique_entity_name(F("dhw_water_heater")) + F("/set");
  String dhwModeCmdTopic = config.MqttTopic + "/" + unique_entity_name(F("dhw_mode")) + F("/set");
  String shModeCmdTopic = config.MqttTopic + "/" + unique_entity_name(F("sh_mode")) + F("/set");
@@ -277,6 +293,10 @@ off
  {
  on_force_dhw_command(payload);
  }
+ else if (turnOnOffCmdTopic == topic)
+ {
+ on_turn_on_off_command(payload);
+ }
  }
  catch (std::exception const& ex)
  {
@@ -463,6 +483,39 @@ off
  return true;
  }
 
+ bool publish_ha_turn_on_off_auto_discover()
+ {
+ // https://www.home-assistant.io/integrations/switch.mqtt/
+ String uniqueName = unique_entity_name(F("turn_on_off_hp"));
+
+ const auto& config = config_instance();
+ String discoveryTopic = String(F("homeassistant/switch/")) + uniqueName + F("/config");
+ String stateTopic = config.MqttTopic + "/" + unique_entity_name(F("mode_power")) + F("/state");
+ String cmdTopic = config.MqttTopic + "/" + uniqueName + F("/set");
+
+ DynamicJsonDocument payloadJson(8192);
+ payloadJson[F("name")] = uniqueName;
+ payloadJson[F("unique_id")] = uniqueName;
+ payloadJson[F("icon")] = F("mdi:power");
+
+ add_discovery_device_object(payloadJson);
+
+ payloadJson[F("stat_t")] = stateTopic;
+ payloadJson[F("stat_t_tpl")] = F("{{ value }}");
+ payloadJson[F("stat_on")] = F("on");
+ payloadJson[F("stat_off")] = F("off");
+ payloadJson[F("cmd_t")] = cmdTopic;
+ payloadJson[F("cmd_tpl")] = F("{{ value }}");
+
+ if (!publish_mqtt(discoveryTopic, payloadJson, /* retain =*/true))
+ {
+ log_web(F("Failed to publish homeassistant turn On/Off HP entity auto-discover"));
+ return false;
+ }
+
+ return true;
+ }
+
  bool publish_ha_set_dhw_temp_auto_discover()
  {
  // https://www.home-assistant.io/integrations/water_heater.mqtt/
@@ -679,6 +732,9 @@ off
  if (!publish_ha_force_dhw_auto_discover())
  anyFailed = true;
 
+ if (!publish_ha_turn_on_off_auto_discover()) 
+ anyFailed = true;
+
  if (!publish_ha_set_dhw_temp_auto_discover())
  anyFailed = true;
 
@@ -888,6 +944,12 @@ off
  return false;
  }
 
+ if (!mqttClient.subscribe(config.MqttTopic + "/" + unique_entity_name(F("turn_on_off_hp")) + F("/set")))
+ {
+ log_web(F("Failed to subscribe to turn ON/OFF command topic!"));
+ return false;
+ }
+
  if (!mqttClient.subscribe(config.MqttTopic + "/" + unique_entity_name(F("dhw_water_heater")) + F("/set")))
  {
  log_web(F("Failed to subscribe to DHW temperature topic!"));

ecodan-ha-local/ehal_proto.h

@@ -28,6 +28,7 @@ namespace ehal::hp
 #define SET_SETTINGS_FLAG_HP_MODE 0x08
 #define SET_SETTINGS_FLAG_DHW_MODE 0x04
 #define SET_SETTINGS_FLAG_MODE_TOGGLE 0x1
+#define SET_SETTINGS_FLAG_SYSTEM_MODE_POWER 0x01
 
  enum class SetZone
  {