two-way-Switch-synchronization.yaml

blueprint:
  name: Two-Way Switch Synchronization
  description: >
    ## Bind two switches together to operate in unison
    
    **Version**: v1.1
  domain: automation
  input:
    switch_1:
      name: Switch 1
      selector:
        entity:
          domain: switch
    switch_2:
      name: Switch 2
      selector:
        entity:
          domain: switch

variables:
  switch_1: !input switch_1
  switch_2: !input switch_2

trigger:
  - platform: state
    entity_id: 
      - !input switch_1
      - !input switch_2
    to:
      - 'on'
      - 'off'

# Using 'restart' mode to avoid missing rapid triggers
mode: restart

# Avoids reacting if the state has not actually changed
condition:
  '{{ trigger.to_state.state != trigger.from_state.state }}'

action:
  # Synchronization from Switch 1 to Switch 2
  - choose:
      - conditions:
          - '{{ trigger.entity_id != switch_1 }}'
          - '{{ trigger.to_state.state != states(switch_1) }}'
        sequence:
          - service: 'switch.turn_{{ trigger.to_state.state }}'
            target:
              entity_id: !input switch_1

  # Synchronization from Switch 2 to Switch 1
  - choose:
      - conditions:
          - '{{ trigger.entity_id != switch_2 }}'
          - '{{ trigger.to_state.state != states(switch_2) }}'
        sequence:
          - service: 'switch.turn_{{ trigger.to_state.state }}'
            target:
              entity_id: !input switch_2
          
  # Optional: Slight delay to prevent bouncing
  - delay: '00:00:03'