blueprint:
  author: runejuhl
  homeassistant:
    min_version: 2025.2.4
  name: Radiator external temperature sensor control (0.0.2-alpha)
  description: |-
    ## Radiator external temperature sensor control

    Version `0.0.2-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
          multiple: false
    climate_sensor:
      name: Climate sensor temperature entity
      selector:
        entity:
          filter:
          - device_class:
            - temperature
          multiple: false
mode: queued

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

triggers:
- entity_id: !input climate_sensor
  trigger: state

conditions:
# We only want to execute the action if
#
# * the temperature sensor is available, or
#
# * 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: |-
    {% if state_attr(temperature_entity, 'temperature') is none %}
    False
    {% elif state_attr(climate_entity, 'external_measured_room_sensor') == None %}
    True
    {% else %}
    {{
      ( (state_attr(climate_entity, 'external_measured_room_sensor')
         - (trigger.to_state.state | float) * 100) | abs)
      >= 10
    }}
    {% endif %}

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) or (trigger.to_state.state in ['unavailable', 'unknown']) %}
      {{ state_attr(temperature_entity, 'temperature') }}
      {% else %}
      {{ trigger.to_state.state | float }}
      {% endif %}
- action: number.set_value
  target:
    entity_id: number.{{ states[climate_entity].object_id }}_external_measured_room_sensor
  data:
    value: |-
      {{
        (external_temperature * 100) | int
      }}