Copying light state to another device on the fly

Configuration
1

I have lights automation that adopts to many things like time of day etc, however often, my wife changes them manually.

I would like to make automation, that would copy the light color from one (A) entity to another (A) whenever the xy color changes on the fly.

Is it even possible?

2

Create a light group (Settings > Devices and Services > Helpers) and replace the lights in your dashboard by the new group light, so when your wife change setting, the whole group will be affected.

3

It is a work-around. I would like to be able to change it after her changes as well as only to work over certain hours.

I need a template / automation for that however no clue how to set it up

4

could be achieved with:


alias: 1 TEST clone color
description: ""
trigger:
  - platform: state
    entity_id:
      - light.a
    attribute: xy_color
condition: []
action:
  - service: light.turn_on
    data:
      xy_color: "{{ state_attr(trigger.entity_id, 'xy_color') }}"
    target:
      entity_id:
        - light.b
mode: single

But that doesn’t fit what you wrote in your last post. So I would create a snapshot:


  action:

    else:
    - service: scene.create
      data:
        scene_id: my_snapshot
        snapshot_entities:
        - light.a

The new created scene is available as scene.my_snapshot. Note, that the scene can be overwritten, for more information see here: Scenes - Home Assistant

1 Like
5

You probably will need a trigger per attribute you want to sync.

Something like this (probably needing some trimming):

alias: Sync lights
description: ""
trigger:
  - id: Turn off
    platform: state
    entity_id:
      - light.kitchen_table_light_1
      - light.kitchen_table_light_2
      - light.kitchen_table_light_3
    from: "on"
    to: "off"
  - id: Turn on
    platform: state
    entity_id:
      - light.kitchen_table_light_1
      - light.kitchen_table_light_2
      - light.kitchen_table_light_3
    from: "off"
    to: "on"
  - id: Change brightness
    platform: state
    entity_id:
      - light.kitchen_table_light_1
      - light.kitchen_table_light_2
      - light.kitchen_table_light_3
    attribute: brightness
  - id: Change color temperature
    platform: state
    entity_id:
      - light.kitchen_table_light_1
      - light.kitchen_table_light_2
      - light.kitchen_table_light_3
    attribute: color_temp
condition: []
action:
  - if:
      - condition: trigger
        id: Turn off
    then:
      - service: light.turn_off
        target:
          entity_id:
            - light.kitchen_table_light_1
            - light.kitchen_table_light_2
            - light.kitchen_table_light_3
        data: {}
    else:
      - service: light.turn_on
        target:
          entity_id:
            - light.kitchen_table_light_1
            - light.kitchen_table_light_2
            - light.kitchen_table_light_3
        data:
          brightness: "{{ state_attr(trigger.entity_id, 'brightness') | int }}"
          color_temp: "{{ state_attr(trigger.entity_id, 'color_temp') | int }}"
mode: single