Created
September 12, 2022 21:19
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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.
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blueprint: | |
name: Link On/Off State of Multiple Devices | |
description: | | |
## Link On/Off State of Multiple Devices 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' | |
condition: | |
- condition: template | |
value_template: '{{ trigger.to_state.state != trigger.from_state.state }}' | |
- condition: template | |
value_template: '{{ (trigger.to_state.state == "on") or (trigger.to_state.state == "off") }}' | |
- 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: | |
- service: homeassistant.turn_{{ trigger.to_state.state }} | |
target: | |
entity_id: '{{ expand(linked_entities) | selectattr("entity_id", "!=", trigger.entity_id) | map(attribute="entity_id") | list }}' |
There is a bug in this blueprint. If you turn lights on and off in quick succession they desynchronize sometimes and keep turning on and off... Fast... This could wear out the switches if this happens randomly or at night where you might not notice. I guess some small delays could be introduced to double check the state?
After some tweaking it seems that the mode is the issue for me. Changing this to restart fixed the issue. Perhaps some improvements could be made here?
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I did an analysis here:
https://community.home-assistant.io/t/synchronize-the-on-off-state-of-2-entities/259010/81?u=dbrand666
I think I went a little overboard - assuming there are multiple controllers. In HA, there's only one queue we really need to worry about.