How do you sync all of the lights in a group?

Configuration
1

Hi there, i was wondering how you can sync all the lights in a group. For example i might have
light.bedside_light_left, light.bedside_light_right, light.master_bedroom_light in a group. If one of these changes state I would like the rest to follow. I’ve looked around and can’t figure out how to do it.
Thanks

2

I assume you mean if someone changes an individual light?

You have to automate syncing in that case.

Are you using the light group platform or group integration?

3

I’m just using group. All of my lights have on device controls so i cant have some master group switch, each one individually has to control the entire group. So if i turn on light.bedside_light_left then i want light.bedside_light_right and light.master_bedroom_light to also turn on. Same for turning off.

4

As Tom said, you have the answer.

5

Here’s an abbreviated example:

trigger:
  platform: state
  entity_id:
    - light.bedside_light_left
    - light.bedside_light_right
    - light.master_bedroom_light
  to: # a null 'to' triggers on all state changes, but not attribute changes. So this wont change brightness or colour, only the on/off state of the lights
condition:
  condition: template
  value_template: "{{ trigger.to_state.state in ['off', 'on'] }}"
action:
  service: "homeassistant.turn_{{ trigger.to_state.state }}"
  target:
    entity_id: group.your_light_group_here ### <--- change this

Note: lists of entities are not supported in the UI automation editor. You have to use yaml view mode, or list all the triggers individually, like this:

trigger:
  - platform: state
    entity_id: light.bedside_light_left
    to: 
  - platform: state
    entity_id: light.bedside_light_right
    to: 
  - platform: state
    entity_id: light.master_bedroom_light
    to:
2 Likes
6

That works, thanks a lot! I’m new to HA and don’t quite know what i’m doing yet.

7

hey sorry
I am also a beginner here.
If my light is a dimmer can I also have the exact dimmer state. If e.g. on entity changes to 60 that all follow?
my lights are zwave dimmers. I need to test what happens what actually happens if one of the entities in the group does send out a report while dimming up or down with a intermediate value… So I do not create a festival of endless loop blinking

1 Like
8

I tried this but get an error
not sure how to define the value template… it can be 0-100, ON, OFF

trigger:
  - platform: state
    entity_id:
      - light.zw_dimmer_12
    attribute: brightness
  - platform: state
    entity_id:
      - light.zw_dimmer_13
    attribute: brightness
  - platform: state
    entity_id:
      - light.zw_dimmer_14
    attribute: brightness
condition:
  - condition: template
    value_template: '{{ trigger.to_state.state }}'
action:
  - service: homeassistant.turn_{{ trigger.to_state.state }}
    target:
      entity_id: light.zw_grp_dimmer_wohnbereich

error: Error handling message: template value should be a string for dictionary value @ data['value_template']. Got None (invalid_format

1 Like
9

thanks that excatly what i need!