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Home Assistant Blueprint: Link Multiple Switches v1.0.1
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| blueprint: | |
| name: Link Multiple Switches | |
| description: | | |
| ## Link multiple switches together v1.0.1 | |
| Select multiple switch entities to link their on/off state. If any selected switch entity is turned on or off, the other selected entities will be sent a matching on or off command. | |
| Requires Home Assistant 2022.5.0 or newer. | |
| Credit to @adchevrier for the initial blueprint: https://community.home-assistant.io/t/synchronize-the-on-off-state-of-2-entities/259010 | |
| Credit to @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: | |
| switches: | |
| name: Switch Entites | |
| selector: | |
| entity: | |
| domain: switch | |
| multiple: true | |
| source_url: https://gist.github.com/aderusha/4f25658dbb855675b5b5ccf296fd801b | |
| mode: queued | |
| max_exceeded: silent | |
| variables: | |
| switches: !input 'switches' | |
| trigger: | |
| - platform: state | |
| entity_id: !input 'switches' | |
| condition: | |
| - condition: template | |
| value_template: '{{ trigger.to_state.state != trigger.from_state.state }}' | |
| - condition: template | |
| value_template: '{{ trigger.to_state.state != "unknown" }}' | |
| - 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(switches) | selectattr("entity_id", "!=", trigger.entity_id) | map(attribute="entity_id") | list }}' |
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It looks like the last condition is intended to prevent recursion (i.e. infinite toggling of the switch state). The effectiveness of this condition will depend on the to_state's context parent ID.