Bidirectional synchronization between one or more switches and one or more light entities.

sync_switches_lights.yaml

blueprint:
  name: Sync Switches and Lights
  description: >
    Bidirectional synchronization between one or more switches
    and one or more light entities. When any switch or light
    changes state, all the others automatically follow.
    Protected against infinite loops.
  domain: automation

  input:
    switch_entities:
      name: Switches
      description: Select one or more switches to synchronize
      selector:
        entity:
          domain: switch
          multiple: true

    light_entities:
      name: Lights
      description: Select one or more lights to synchronize
      selector:
        entity:
          domain: light
          multiple: true

variables:
  switches: !input switch_entities
  lights: !input light_entities

mode: single

trigger:
  - platform: state
    entity_id: !input switch_entities
    to: "on"
    id: switch_on

  - platform: state
    entity_id: !input switch_entities
    to: "off"
    id: switch_off

  - platform: state
    entity_id: !input light_entities
    to: "on"
    id: light_on

  - platform: state
    entity_id: !input light_entities
    to: "off"
    id: light_off

action:
  - choose:
      # Switch turned ON → turn on all lights and other switches that are off
      - conditions:
          - condition: trigger
            id: switch_on
        sequence:
          - service: light.turn_on
            target:
              entity_id: >
                {{ lights | select('is_state', 'off') | list }}
          - service: switch.turn_on
            target:
              entity_id: >
                {{ switches
                   | reject('eq', trigger.entity_id)
                   | select('is_state', 'off')
                   | list }}

      # Switch turned OFF → turn off all lights and other switches that are on
      - conditions:
          - condition: trigger
            id: switch_off
        sequence:
          - service: light.turn_off
            target:
              entity_id: >
                {{ lights | select('is_state', 'on') | list }}
          - service: switch.turn_off
            target:
              entity_id: >
                {{ switches
                   | reject('eq', trigger.entity_id)
                   | select('is_state', 'on')
                   | list }}

      # Light turned ON → turn on all switches and other lights that are off
      - conditions:
          - condition: trigger
            id: light_on
        sequence:
          - service: switch.turn_on
            target:
              entity_id: >
                {{ switches | select('is_state', 'off') | list }}
          - service: light.turn_on
            target:
              entity_id: >
                {{ lights
                   | reject('eq', trigger.entity_id)
                   | select('is_state', 'off')
                   | list }}

      # Light turned OFF → turn off all switches and other lights that are on
      - conditions:
          - condition: trigger
            id: light_off
        sequence:
          - service: switch.turn_off
            target:
              entity_id: >
                {{ switches | select('is_state', 'on') | list }}
          - service: light.turn_off
            target:
              entity_id: >
                {{ lights
                   | reject('eq', trigger.entity_id)
                   | select('is_state', 'on')
                   | list }}