How to include which sensor triggered a action in message e.g. someone home

Configuration
1

I have a group of presence sensors e.g. binary_sensor.dad_home, binary_sensor.mum_home, binary_sensor.guest_smartthings etc and some device trackers from owntracks and my unifi APs. I’ve created automations that are triggered by someone arriving/leaving etc, but how do I add the actual person or sensor to the alert?

e.g

  - alias: 'Heating, Hot Water on and Alarm off when someone arrives'
    trigger:
      - platform: state
        entity_id: group.presence
        from: 'off'
        to: 'on'
      - platform: state
        entity_id: group.all_devices
        from: 'not_home'
        to: 'home'
    condition:
        condition: or
        conditions:
         - condition: state
           entity_id: group.presence
           state: 'off'
         - condition: state
           entity_id: group.all_devices
           state: 'not_home'
    action:
      - service: climate.set_operation_mode
        entity_id: climate.hive_heating
        data:
            operation_mode: "SCHEDULE"
      - service: climate.set_operation_mode
        entity_id: climate.hive_hotwater
        data:
            operation_mode: "SCHEDULE"
      - service: notify.html5
        data:
            title: "Welcome Home!"
            message: "{{ as_timestamp(now()) | timestamp_custom('%I:%M%p', true) }} Alarm disarmed and Central Heating set to Schedule"
      - service: alarm_control_panel.alarm_disarm
        entity_id: alarm_control_panel.house

How do I modify the above automation to include the actual presence device or device tracker that triggered it?

Thanks in advance

2

See here. You’d use {{ trigger.entity_id }}, though from that automation it’d possibly be group.presence or group.all_devices. You might need to list them individually.