Interlock 2 Entities - Single Run Mode

Blueprints Exchange
1

A simple blueprint that, given two entities, turns one off when the other one is turned on. The entities can both be off, but only one at a time can be on.

blueprint:
  name: Interlock
  description: Turns off one entity when the other one is turned on
  domain: automation
  input:
    entity_1:
      name: First entity
      selector:
        entity:
    entity_2:
      name: Second entity
      selector:
        entity: 
mode: single
max_exceeded: silent
variables:
  entity_1: !input 'entity_1'
  entity_2: !input 'entity_2'
trigger:
- platform: state
  entity_id: !input 'entity_1'
- platform: state
  entity_id: !input 'entity_2'
condition: '{{ trigger.to_state.state == "on" }}'
action:
- service: homeassistant.turn_off
  target:
    entity_id: >
      {% if trigger.from_state.entity_id == entity_1 %}
      {{ entity_2 }}
      {% else %}
      {{ entity_1 }}
      {% endif %}
3 Likes
2

Hey, I changed it to work with 3 entities, it seems to be doing ok so far :slight_smile:

blueprint:
  name: Interlock
  description: Turns off one entity when the other one is turned on
  domain: automation
  input:
    entity_1:
      name: First entity
      selector:
        entity: {}
    entity_2:
      name: Second entity
      selector:
        entity: {}
    entity_3:
      name: Third entity
      selector:
        entity: {}
  source_url: https://community.home-assistant.io/t/interlock-2-entities-single-run-mode/410062
mode: single
max_exceeded: silent
variables:
  entity_1: !input 'entity_1'
  entity_2: !input 'entity_2'
  entity_3: !input 'entity_3'
trigger:
- platform: state
  entity_id: !input 'entity_1'
- platform: state
  entity_id: !input 'entity_2'
- platform: state
  entity_id: !input 'entity_3'
condition: '{{ trigger.to_state.state == "on" }}'
action:
- service: homeassistant.turn_off
  target:
    entity_id: >-
      {% if trigger.from_state.entity_id == entity_1 %}
      {{ entity_2, entity_3 }}
      {% elif trigger.from_state.entity_id == entity_2 %}
      {{ entity_3, entity_1 }}
      {% else %}
      {{ entity_1, entity_2 }}
      {% endif %}
3 Likes
3

@krash You’re the Master!!. Thank you so much for your help with this blueprint, is perfect. Only one question. I would like to use to manage 3 speed selector in a exhaust fan, and I suspect this automation first switch on the entity (L1 or speed 1 in my case) and them switch off the rest of entities (L2 and L3 in my case). In my case I don’t want 2 entities would be in ON a milliseconds because I’m managing fan motor. Would be possible to add a pause (1 or 2 seconds, no more) since I switch on and entity and automation switch off the others??.
Thanks for your help.

5

Since you are concerned about switching everything off before switching the desired switch turns on, and you only have 3 entities, I would just make 3 scripts.

Each script would turn all the switches off, delay some ms, then turn on the one you want.

Then just run script 1,2 or 3 instead of switches.

I don’t know if I’m making sense, let me know if you want me to explain it better :slight_smile: