---
blueprint:
  author: runejuhl
  homeassistant:
    min_version: 2024.6.0
  name: Radiator external temperature sensor control (0.0.1-alpha)
  description: |-
    ## Radiator external temperature sensor control

    Version `0.0.1-alpha`.

    Sets the `external_measured_room_sensor` value on Danfoss Ally TRV, enabling
    the TRV to adjust the valve based on an external sensor.
  domain: automation
  source_url: https://git.petardo.dk/runejuhl/hass-blueprints/raw/branch/dev/blueprints/danfoss_ally_trv_external_sensor.yaml

  input:
    radiator:
      name: Radiator thermostat
      selector:
        entity:
          filter:
            - domain: climate
    climate_sensor:
      name: Climate sensor temperature entity
      selector:
        entity:
          filter:
            - device_class:
              - temperature

mode: queued

variables:
  climate_entity: !input radiator
  temperature_entity: !input climate_sensor

triggers:
  - entity_id: !input climate_sensor
    attribute: temperature
    trigger: state

conditions:
  # We only want to execute the action if the temperature has changed by at
  # least 0.1 degress C, according to the Zigbee2MQTT documentation for the
  # device: https://www.zigbee2mqtt.io/devices/014G2461.html
  #
  # `external_measured_room_sensor` defaults to `-8000`, so this will work in
  # all cases.
  - condition: template
    value_template: >-
      {{
        (
         (
          state_attr(climate_entity, 'external_measured_room_sensor') -
           trigger.to_state.attributes.temperature * 100)
          | abs)
        >= 10
      }}

actions:
  - variables:
      # If we don't have a trigger ID the automation has been run manually, in
      # which case we pull the temperature from the sensor instead of the
      # trigger state.
      external_temperature: >-
        {% if trigger.id is not defined %}
        {{ state_attr(temperature_entity, 'temperature') }}
        {% else %}
        {{ trigger.to_state.attributes.temperature }}
        {% endif %}
  - action: number.set_value
    target:
      entity_id: |-
        number.{{ states[climate_entity].object_id }}_external_measured_room_sensor
    data:
      value: >-
        {{
          (external_temperature * 100) | int
        }}