unavailable_device_notificator.yaml

blueprint:
  name: Unavailable Device Notificator
  description: Detect devices becoming unavailable, exclude specific devices, and execute custom actions.
  domain: automation
  author: Edison Montes @_GeekMD_
  homeassistant:
    min_version: 2024.6.0

  input:
    excluded_devices:
      name: Excluded devices
      description: Devices that are going to be excluded from detection.
      selector:
        device:
          multiple: true
      default: []

    start_time:
      name: Start Time
      description: The start time when the actions are allowed.
      selector:
        time:
      default: "08:00:00"

    end_time:
      name: End Time
      description: The end time when the actions are allowed.
      selector:
        time:
      default: "22:00:00"

    action:
      name: Actions
      description: >
        Actions which are performed when a device becomes unavailable.
        You can use the variable {{ unavailable_devices }} in your actions.
      selector:
        action: {}

mode: single

trigger:
  - platform: event
    event_type: state_changed
    event_data:
      new_state:
        state: unavailable

  - platform: event
    event_type: state_changed
    event_data:
      new_state:
        state: unknown

variables:
  excluded_devices: !input excluded_devices

  unavailable_devices_list: >
    {% set result = [] %}
    {% for s in states
         | selectattr('state', 'in', ['unavailable', 'unknown'])
         | selectattr('attributes.device_id', 'defined') %}
      {% if s.attributes.device_id not in excluded_devices %}
        {% set name = s.attributes.friendly_name | default(s.name) %}
        {% if name not in result %}
          {% set result = result + [name] %}
        {% endif %}
      {% endif %}
    {% endfor %}
    {{ result }}

  unavailable_devices: >
    {{ unavailable_devices_list | join('\n') }}

condition:
  - condition: time
    after: !input start_time
    before: !input end_time

  - condition: template
    value_template: "{{ unavailable_devices_list | length > 0 }}"

action: !input action