HA_Sync_brightness_lights.yaml

HA_Sync_brightness_lights.yaml

blueprint:
  name: Link brightness of Multiple lights
  description: |
    ## Link brightness of Multiple lights v1.0.0
    Select multiple entities to link their on/off state.  If any selected entity is turned on or off, the other selected entities will be sent a matching on or off command.
    You can select any entity, but only entities supported by the `homeassistant.turn_on` or `homeassistant.turn_off` service calls will work.
    ### Requirements
    * All selected entities MUST suport `homeassistant.turn_on` and `homeassistant.turn_off` or errors will be logged and the blueprint will not work.
    * Requires Home Assistant 2022.5.0 or newer.
    
    ### Credits
    * [@adchevrier](https://community.home-assistant.io/u/adchevrier) for the [initial blueprint](https://community.home-assistant.io/t/synchronize-the-on-off-state-of-2-entities/259010)
    * [@hebus](https://community.home-assistant.io/u/hebus) for [this fantastic template](https://community.home-assistant.io/t/synchronize-the-on-off-state-of-2-entities/259010/38)
  domain: automation
  homeassistant:
    min_version: 2022.5.0
  input:
    linked_entities:
      name: Entities to link
      selector:
        entity:
          multiple: true

mode: queued
max_exceeded: silent

variables:
  linked_entities: !input 'linked_entities'

trigger:
- platform: state
  entity_id: !input 'linked_entities'
  attribute: brightness

condition:
- condition: template
  value_template: '{{ trigger.to_state.brightness != trigger.from_state.brightness }}'
- condition: template
  value_template: '{{trigger.to_state.context.parent_id is none or (trigger.to_state.context.id != this.context.id and trigger.to_state.context.parent_id != this.context.id) }}'

action:
  - choose:
      - conditions:
          - condition: state
            entity_id: |-
              {{ expand(linked_entities) | selectattr("entity_id", "!=",
                trigger.entity_id) | map(attribute="entity_id") | list }}
            state: "off"
        sequence:
          - service: homeassistant.turn_off
        target:
          entity_id: '{{ expand(linked_entities) | selectattr("entity_id", "!=", trigger.entity_id) | map(attribute="entity_id") | list }}'
      - conditions:
          - condition: state
            entity_id: |-
              {{ expand(linked_entities) | selectattr("entity_id", "!=",
                trigger.entity_id) | map(attribute="entity_id") | list }}
            state: "on"
        sequence:
          - service: homeassistant.turn_on
        target:
          entity_id: '{{ expand(linked_entities) | selectattr("entity_id", "!=", trigger.entity_id) | map(attribute="entity_id") | list }}'
        data:
          brightness: '{{ trigger.to_state.attributes.brightness }}'