SyncStates-2.yaml

# 
# Home Assistant Automation Blueprint
#
# Synchronize on/off states on three devices
#
# Revision 1.3 - Added condition to handle unavailable states
# Modified by Johan Schelin, Apr. 2021
#

blueprint:
  name: Synchronization status - 2
  description: Bind two entities together to act in unison (selected entites must
    all support the same state values) - In this version restricted to on/off
  domain: automation
  input:
    switch_1:
      name: First entity
      description: Mandatory - The first entity to keep in sync.
      selector:
        entity: {}
    switch_2:
      name: Second entity
      description: Mandatory - The second entity to keep in sync.
      selector:
        entity: {}
  source_url: https://github.com/johanschelin/ha_blueprints/edit/main/SyncStates-2
mode: restart
max_exceeded: silent
variables:
  switch_1: !input 'switch_1'
  switch_2: !input 'switch_2'
trigger:
- platform: state
  entity_id: 
    - !input 'switch_1'
    - !input 'switch_2'
  from:
    - 'on'
    - 'off'
condition:
- condition: template
  value_template: '{{ states(switch_1) != ''unavailable'' }}'
- condition: template
  value_template: '{{ states(switch_2) != ''unavailable'' }}'
action:
- service: homeassistant.turn_{{ trigger.to_state.state }}
  data:
    entity_id: '{% if trigger.from_state.entity_id == switch_1 %} {{ switch_2 }} {% else %} {{ switch_1 }} {% endif %}'