[Home Assistant] Allows configuration of up to six shared switches at once, so you can group all the three/multi-way devices you have in the same room in a single automation.

multi-way-switches.yaml

blueprint:
  name: Multiple multi-way switches
  domain: automation
  description: |
    Allows configuration of up to six shared switches at once, so you can group all the three/multi-way devices you have in the same room in a single automation.
    
    **All groups besides the first one are optional.**
    
    > _Shout out to TopsyKrets, who published a [single-switch version of this blueprint](https://community.home-assistant.io/t/shared-on-off-state-entities-3-way-switch/580684?u=igorsantos07) back in 2023!_
  input:
    switch_entities1: &input
      name: 1st group of entities that will share state
      selector: &selector
        entity:
          domain:
            - switch
            - fan
            - light
          multiple: true
    switch_entities2: &optional_input
      <<: *input
      name: The 2nd group of entities that will share state
      default: []
      description: Optional
    switch_entities3:
      <<: *optional_input
      name: The 3rd group of entities that will share state
    switch_entities4:
      <<: *optional_input
      name: The 4th group of entities that will share state
    switch_entities5:
      <<: *optional_input
      name: The 5th group of entities that will share state
    switch_entities6:
      <<: *optional_input
      name: The 6th group of entities that will share state
      
mode: single
max_exceeded: silent

triggers:
  - &trigger
    id: "1"
    alias: Group 1
    platform: state
    entity_id: !input switch_entities1
    from: &states
      - "on"
      - "off"
    to: *states
  - <<: *trigger
    id: "2"
    alias: Group 2
    entity_id: !input switch_entities2
  - <<: *trigger
    id: "3"
    alias: Group 3
    entity_id: !input switch_entities3
  - <<: *trigger
    id: "4"
    alias: Group 4
    entity_id: !input switch_entities4
  - <<: *trigger
    id: "5"
    alias: Group 5
    entity_id: !input switch_entities5
  - <<: *trigger
    id: "6"
    alias: Group 6
    entity_id: !input switch_entities6

variables:
  value: "{{ trigger.to_state.state }}"
  entities1: !input switch_entities1
  entities2: !input switch_entities2
  entities3: !input switch_entities3
  entities4: !input switch_entities4
  entities5: !input switch_entities5
  entities6: !input switch_entities6
  targets1: "{{ expand(entities1) | rejectattr('entity_id','eq', trigger.entity_id) | selectattr('state','!=', value) | map(attribute='entity_id') | list }}"
  targets2: "{{ expand(entities2) | rejectattr('entity_id','eq', trigger.entity_id) | selectattr('state','!=', value) | map(attribute='entity_id') | list }}"
  targets3: "{{ expand(entities3) | rejectattr('entity_id','eq', trigger.entity_id) | selectattr('state','!=', value) | map(attribute='entity_id') | list }}"
  targets4: "{{ expand(entities4) | rejectattr('entity_id','eq', trigger.entity_id) | selectattr('state','!=', value) | map(attribute='entity_id') | list }}"
  targets5: "{{ expand(entities5) | rejectattr('entity_id','eq', trigger.entity_id) | selectattr('state','!=', value) | map(attribute='entity_id') | list }}"
  targets6: "{{ expand(entities6) | rejectattr('entity_id','eq', trigger.entity_id) | selectattr('state','!=', value) | map(attribute='entity_id') | list }}"

actions:
  - choose:
      - conditions:
          - condition: trigger
            id: 
              - "1"
          - condition: template
            value_template: >
              {{ targets1 not in ([], none) }}
        sequence:
          - &service
            service: homeassistant.turn_{{ value }}
            target:
              entity_id: "{{ targets1 }}"
      - conditions:
          - condition: trigger
            id: 
              - "2"
          - condition: template
            value_template: >
              {{ targets2 not in ([], none) }}
        sequence:
          - <<: *service
            target:
              entity_id: "{{ targets2 }}"
      - conditions:
          - condition: trigger
            id: 
              - "3"
          - condition: template
            value_template: >
              {{ targets3 not in ([], none) }}
        sequence:
          - <<: *service
            target:
              entity_id: "{{ targets3 }}"
      - conditions:
          - condition: trigger
            id: 
              - "4"
          - condition: template
            value_template: >
              {{ targets4 not in ([], none) }}
        sequence:
          - <<: *service
            target:
              entity_id: "{{ targets4 }}"
      - conditions:
          - condition: trigger
            id: 
              - "5"
          - condition: template
            value_template: >
              {{ targets5 not in ([], none) }}
        sequence:
          - <<: *service
            target:
              entity_id: "{{ targets5 }}"
      - conditions:
          - condition: trigger
            id: 
              - "6"
          - condition: template
            value_template: >
              {{ targets6 not in ([], none) }}
        sequence:
          - <<: *service
            target:
              entity_id: "{{ targets6 }}"