Config.yaml:
climate:
#
  - platform: mqtt
    modes:
      - "off"
      - "heat"
    name: Dormitor HVAC
    current_temperature_topic: "HVAC/dormitor/ct"
    mode_command_topic: "HVAC/dormitor/mode/set"
    temperature_command_topic: "HVAC/dormitor/st"
    min_temp: 12
    max_temp: 26
    value_template: "{{ value }}"
    temp_step: 0.5
#
  - platform: mqtt
    modes:
      - "off"
      - "heat"
    name: Copii HVAC
    current_temperature_topic: "HVAC/copii/ct"
    mode_command_topic: "HVAC/copii/mode/set"
    temperature_command_topic: "HVAC/copii/st"
    min_temp: 12
    max_temp: 26
    value_template: "{{ value }}"
    temp_step: 0.5
#
  - platform: mqtt
    modes:
      - "off"
      - "heat"
    name: Sufragerie HVAC
    current_temperature_topic: "HVAC/sufragerie/ct"
    mode_command_topic: "HVAC/dormitor/sufragerie/set"
    temperature_command_topic: "HVAC/sufragerie/st"
    min_temp: 12
    max_temp: 26
    value_template: "{{ value }}"
    temp_step: 0.5
#
binary_sensor:
#
  - platform: mqtt
    name: copii_geam
    state_topic: 'zigbee2mqtt/Copii_geam'
    value_template: "{{ value_json.contact }}"
    payload_on: false
    payload_off: true
    qos: 0
    retain: true
#
  - platform: mqtt
    name: dormitor_geam
    state_topic: 'zigbee2mqtt/Dormitor_geam'
    value_template: "{{ value_json.contact }}"
    payload_on: false
    payload_off: true
    qos: 0
    retain: true
#
  - platform: mqtt
    name: sufragerie_geam
    state_topic: 'zigbee2mqtt/Sufragerie_geam'
    value_template: "{{ value_json.contact }}"
    payload_on: false
    payload_off: true
    qos: 0
    retain: true
#



Automations:
#
- alias: temp_dormitor
  trigger:
    - platform: state
      entity_id: sensor.0x00158d000465809a_temperature
  action:
    service: mqtt.publish
    data:
      payload: "{{ states('sensor.0x00158d000465809a_temperature') }}"
      topic: "HVAC/dormitor/ct"
      qos: 0
      retain: true
#
- alias: temp_copii
  trigger:
    - platform: state
      entity_id: sensor.0x00158d000464b329_temperature
  action:
    service: mqtt.publish
    data:
      payload: "{{ states('sensor.0x00158d000464b329_temperature') }}"
      topic: "HVAC/copii/ct"
      qos: 0
      retain: true
#
- alias: temp_sufragerie
  trigger:
    - platform: state
      entity_id: sensor.0x00158d00045d01f4_temperature
  action:
    service: mqtt.publish
    data:
      payload: "{{ states('sensor.0x00158d00045d01f4_temperature') }}"
      topic: "HVAC/sufragerie/ct"
      qos: 0
      retain: true
#
- alias: trv_copii
  trigger:
  - platform: state
    entity_id: climate.copii_hvac, sensor.0x00158d000464b329_temperature, binary_sensor.copii_geam
  action:
  - service: mqtt.publish
    data:
      payload_template: >-
        {% set targetTemp = state_attr('climate.copii_hvac', 'temperature') %}
        {% set currentTemp = states('sensor.0x00158d000464b329_temperature') %}
        {% set window = states('binary_sensor.copii_geam') %}
        {% if targetTemp == None or currentTemp == None or currentTemp == 'unknown' or window == None %}
            {{ {"system_mode": "heat"} }}
        {% else %}
          {% if targetTemp|float > currentTemp|float and window == 'off' %}
            {{ {"system_mode": "heat"} }}
          {% else %}
            {{ {"system_mode": "off"} }}
          {% endif %}
        {% endif %}
      topic: "zigbee2mqtt/Copii/set"
  - event: FIRE_OT_RECALC_EVENT
#
- alias: trv_dormitor
  trigger:
  - platform: state
    entity_id: climate.dormitor_hvac, sensor.0x00158d000465809a_temperature, binary_sensor.dormitor_geam
  action:
  - service: mqtt.publish
    data:
      payload_template: >-
        {% set targetTemp = state_attr('climate.dormitor_hvac', 'temperature') %}
        {% set currentTemp = states('sensor.0x00158d000465809a_temperature') %}
        {% set window = states('binary_sensor.dormitor_geam') %}
        {% if targetTemp == None or currentTemp == None or currentTemp == 'unknown' or window == None %}
            {{ {"system_mode": "heat"} }}
        {% else %}
          {% if targetTemp|float > currentTemp|float and window == 'off' %}
            {{ {"system_mode": "heat"} }}
          {% else %}
            {{ {"system_mode": "off"} }}
          {% endif %}
        {% endif %}
      topic: "zigbee2mqtt/Dormitor/set"
  - event: FIRE_OT_RECALC_EVENT
#
- alias: trv_sufragerie
  trigger:
  - platform: state
    entity_id: climate.sufragerie_hvac, sensor.0x00158d00045d01f4_temperature, binary_sensor.sufragerie_geam
  action:
  - service: mqtt.publish
    data:
      payload_template: >-
        {% set targetTemp = state_attr('climate.sufragerie_hvac', 'temperature') %}
        {% set currentTemp = states('sensor.0x00158d00045d01f4_temperature') %}
        {% set window = states('binary_sensor.sufragerie_geam') %}
        {% if targetTemp == None or currentTemp == None or currentTemp == 'unknown' or window == None %}
            {{ {"system_mode": "heat"} }}
        {% else %}
          {% if targetTemp|float > currentTemp|float and window == 'off' %}
            {{ {"system_mode": "heat"} }}
          {% else %}
            {{ {"system_mode": "off"} }}
          {% endif %}
        {% endif %}
      topic: "zigbee2mqtt/Sufragerie/set"
  - event: FIRE_OT_RECALC_EVENT
#
- alias: OpenTherm Calculation
  trigger:
    - platform: event
      event_type: FIRE_OT_RECALC_EVENT
  action:
    - service: mqtt.publish
      data:
        payload_template: >-
          {% set targetTemp1 = state_attr('climate.dormitor_hvac', 'temperature') %}
          {% set currentTemp1 = states('sensor.0x00158d000465809a_temperature') %}
          {% set window1 = states('binary_sensor.dormitor_geam') %}
          {% set targetTemp2 = state_attr('climate.copii_hvac', 'temperature') %}
          {% set currentTemp2 = states('sensor.0x00158d000464b329_temperature') %}
          {% set window2 = states('binary_sensor.copii_geam') %}
          {% set targetTemp3 = state_attr('climate.sufragerie_hvac', 'temperature') %}
          {% set currentTemp3 = states('sensor.0x00158d00045d01f4_temperature') %}
          {% set window3 = states('binary_sensor.sufragerie_geam') %}
          {% if targetTemp1|float > currentTemp1|float and window1 == 'off' %}
            {% set result1 = targetTemp1 %}
          {% else %}
            {% set result1 = '30' %}
          {% endif %}
          {% if targetTemp2|float > currentTemp2|float and window2 == 'off' %}
            {% set result2 = targetTemp2 %}
          {% else %}
            {% set result2 = '30' %}
          {% endif %}
          {% if targetTemp3|float > currentTemp3|float and window3 == 'off' %}
            {% set result3 = targetTemp3 %}
          {% else %}
            {% set result3 = '30' %}
          {% endif %}
          {% if result1 == [result1|float, result2|float, result3|float]|min and result1 < 30 %}
            {% set result = (targetTemp1,currentTemp1|float) %}
          {% else %}
            {% if result2 == [result1|float, result2|float, result3|float]|min and result2 < 30 %}
              {% set result = (targetTemp2,currentTemp2|float) %}
            {% else %}
              {% if result3 == [result1|float, result2|float, result3|float]|min and result3 < 30 %}
                {% set result = (targetTemp3,currentTemp3|float) %}
              {% else %}
                {% set result = (1.0,20.0) %}
              {% endif%}
            {% endif %}
          {% endif %}
          {{ result }}
      topic: "HVAC/otresult"
      retain: true
#
- alias: OpenTherm Force Recalc
  trigger:
    - platform: time_pattern
      seconds: "/20"
  action:
    - event: FIRE_OT_RECALC_EVENT
#
- alias: OpenTherm Send
  trigger:
    - platform: mqtt
      topic: "HVAC/otresult"
  action:
    - service: mqtt.publish
      data: trigger.data.split(',')[0]
      topic: "opentherm-thermostat/setpoint-temperature/set"
      retain: false
      qos: 0
    - service: mqtt.publish
      data: trigger.data.split(',')[1]
      topic: "opentherm-thermostat/current-temperature/set"
      retain: false
      qos: 0