Home Assistant Automation¶

Example Home Assistant automation to send notifications when an MQTT update is received.

This uses Supernotify to respect priorities and make multiple notifications for the same event - in the live example this includes Mobile Push alerts, email (with the snapshot ANPR image as an attachment), chimes ( hunting horn for known vehicles, doorbell chimes for unknown ) and Alexa spoken announcements.

It can be adapted to a plain notification by removing the data section and changing the action. Modern Home Assistant UI allows pasting in yaml to create automations.

alias: Driveway ANPR Alert
description: "Notify via email, chime, Alexa and mobile push when a vehicle identified"
triggers:
  - trigger: state
    entity_id:
      - sensor.anpr_driveway
conditions:
  - condition: not
    conditions:
      - condition: state
        entity_id: sensor.anpr_driveway
        state:
          - unavailable
          - unknown
actions:
  - action: notify.supernotify
    metadata: {}
    data:
      message: >-
        {{ trigger.to_state.attributes.description }} with {{
        trigger.to_state.attributes.plate }} spotted at {{
        trigger.to_state.attributes.camera }} camera, moving {{
        trigger.to_state.attributes.vehicle_direction }}

        {% if trigger.to_state.attributes.previous_sightings == 0 %} Not
        previously sighted  {% else %}  with {{
        trigger.to_state.attributes.previous_sightings }} previous sightings. {%
        endif %} {% if trigger.to_state.attributes.last_sighting is defined %}
        last seen on {{ trigger.to_state.attributes.last_sighting[:10] }} at {{
        trigger.to_state.attributes.last_sighting[11:16] }}   {% endif %}

        {% if trigger.to_state.attributes.reginfo is defined %}  DVLA info: {{
        trigger.to_state.attributes.reginfo }}   {% endif %}
      title: >-
        {{ trigger.to_state.attributes.description }} spotted on {{
        trigger.to_state.attributes.camera }} camera
      data:
        priority: "{{ trigger.to_state.attributes.priority }}"
        apply_scenarios: >-
          {% if trigger.to_state.attributes.known %}known_vehicle{% else
          %}unknown_vehicle{% endif %}
        constrain_scenarios:
          - known_vehicle
          - unknown_vehicle
        media:
          camera_entity_id: image.anpr_{{trigger.to_state.attributes.camera}}
          snapshot_url: "{{ trigger.to_state.attributes.event_image_url }}"
mode: single