sync_trv_with_external_sensor.yaml

# based on: https://community.home-assistant.io/t/tuya-radiator-valve-ts0601-calibration-from-external-sensor-via-zigbee2mqtt/337991
# alternative: https://community.home-assistant.io/t/sync-trv-with-external-tempature-sensor/298024

blueprint:
  name: Calibrate TRV temperature
  description: Temperature calibration for Zigbee valve TS0601, according to external temperature sensor
  domain: automation
  input:
    valve:
      name: Valve
      selector:
        entity:
          domain: climate
    temp_sensor:
      name: Temperature Sensor
      selector:
        entity:
          domain: sensor
          device_class: temperature
mode: single
max_exceeded: silent
variables:
  valve: !input valve
  temp_sensor: !input temp_sensor
  external_temp: "{{ states(temp_sensor) | float(0) | round(1, 'half') }}"
  device_addr: "{{ state_attr(valve, 'device').ieeeAddr }}"
  current_temp: "{{ state_attr(valve, 'current_temperature') | float(0) | round(1, 'half') }}"
  local_calibration: "{{ state_attr(valve, 'local_temperature_calibration') | float(0) | round(1, 'half') }}"
trigger:
  - platform: time_pattern
    minutes: '/10'
  - platform: state
    entity_id: climate.living_room_heater
    attribute: current_temperature
    to: ~
    for:
      seconds: 15
  - platform: state
    entity_id: sensor.living_room_temperature
    to: ~
    for:
      seconds: 15
condition:
  condition: and
  conditions:
    - condition: template
      value_template: "{{ states(valve) != 'unavailable' }}"
    - condition: template
      value_template: "{{ states(valve) != 'unknown' }}"
    - condition: template
      value_template: "{{ states(temp_sensor) != 'unavailable' }}"
    - condition: template
      value_template: "{{ states(temp_sensor) != 'unknown' }}"
    - condition: template
      value_template: '{{ external_temp - (current_temp - local_calibration) != local_calibration }}'
action:
  - service: mqtt.publish
    data_template:
      topic: 'zigbee2mqtt/{{ device_addr }}/set/local_temperature_calibration'
      payload_template: '{{ external_temp - (current_temp - local_calibration) }}'