2 Switches - 1 Light

[kostjazz (Kostya)]

I’ve got a scenario: I have 2 light switches - one on each end of the hallway. Master is wired to the light and Slave is not wired to anything.

What I want is when either of the switches is turned on the other one reflects the state.
Right now I achieved it with 4 automations:

1. when Master is ON: turn on Slave
2. when Master is OFF: turn off Slave
3. when Slave is ON: turn on Master
4. when Slave is OFF: turn off Master

Is there a more elegant way to achieve it?

I tried to put them in the Group and use without automations but it didn’t seem to work: If I started with everything off, then turned on Slave - it would change state of Slave and Group to ON but it wouldn’t affect the Master.

Do you have any suggestions?

Cheers
Kostya

[tom_l]

You could do all that in one automation using trigger ids and the choose action.

[chairstacker]

Haven’t really worked with trigger ids yet, but that’s how I keep my XMas lights in sync:

alias: Switch - Sync XMas Lights
trigger:
  - platform: state
    entity_id: >-
      switch.xmas_living_room,switch.xmas_lobby,switch.outdoor_1,switch.outdoor_2
    from: 'on'
    to: 'off'
  - platform: state
    entity_id: >-
      switch.xmas_living_room,switch.xmas_lobby,switch.outdoor_1,switch.outdoor_2
    from: 'off'
    to: 'on'
action:
  - service: switch.turn_{{ trigger.to_state.state }}
    target:
      entity_id:
        - switch.xmas_lobby
        - switch.xmas_living_room
        - switch.outdoor_1
        - switch.outdoor_2
mode: single

You might even be able to skip the second trigger if you also remove the ‘from’ and ‘to’ from the first one - not sure what it would do when the state changes e.g. from ‘unavailable’ to ‘on’ or from ‘off’ to ‘unavailable’, though.

[kostjazz (Kostya)]

thanks a lot I really like that solution. I’ll give it a go later!

[janick]

Because my switches show up as lights, I had to make a small modification (btw, this code goes into the automations.yaml file):

- alias: Breezeway Light 3-Way Soft Switch
  trigger:
  - platform: state
    entity_id: >-
      light.breezeway_indoor_switch,light.breezeway_outdoor_switch
    from: 'on'
    to: 'off'
  - platform: state
    entity_id: >-
      light.breezeway_indoor_switch,light.breezeway_outdoor_switch
    from: 'off'
    to: 'on'
  action:
    - service: switch.turn_{{ trigger.to_state.state }}
      target:
        entity_id:
          - switch.breezeway_light
    - service: light.turn_{{ trigger.to_state.state }}
      target:
        entity_id:
          - light.breezeway_indoor_switch
          - light.breezeway_outdoor_switch
  mode: single

[Aran]

I was looking for a more elegant solution to link/sync my lights and switches. This works, thank you.

However, i get multiple warnings in my log file each time it’s triggered:

I got the same warnings with my previous solution (using scenes/automations). I think what happens is that when you press SWITCH 1, SWITCH 2 and 3 will change state but they themself trigger the same automation, hence the warning ‘automation already running’.

It works well but i’m afraid my logfile will be quite large in a few years and bloated with these warnings. I’m no expert in HA so i’m not sure how to proceed from here.

Anyone else getting these warnings?

[edit] i changed ‘mode: single’ to ‘mode: restart’ and the warnings stopped. it doesn’t seem to affect the automation so i think i keep it this way.

[tom_l]

Looks like your switch might be bouncing a bit.

Add this to the automation to suppress the warnings:

.
.
.
mode: single
max_exceeded: silent ### Add this ###