Trigger alarm control panel

After a while I enabled again my manual control panel, but I’m not able to trigger it anymore.
Here the relevant sections of my configuration:

alarm_control_panel:
  - platform: manual
    name: "Alarm"
    pending_time: 5
    code: 1111

binary_sensor:
  - platform: mqtt
    name: "Radar west"
    state_topic: "home/alarm/sensor/1"
    availability_topic: "home/alarm/availability"
    payload_available: "online"
    payload_not_available: "offline"

input_text:
  text_alarm:
    name: Text alarm
    initial: ""

automation:
  - id: alarm_triggered_armed_home
    alias: Trigger alarm while armed home
    trigger:
    - entity_id: binary_sensor.radar_west
      platform: state
      to: 'On'
    condition:
    - condition: state
      entity_id: alarm_control_panel.alarm
      state: armed_home
    action:
    - data_template:
        entity_id: input_text.text_alarm
        value: '{{ trigger.to_state.attributes.friendly_name }}'
      service: input_text.set_value
    - entity_id: alarm_control_panel.alarm
      service: alarm_control_panel.alarm_trigger
    hide_entity: false
    initial_state: true
  - id: send_notification_when_alarm_triggered
    alias: Send notification when alarm triggered
    initial_state: true
    trigger:
    - platform: state
      entity_id: alarm_control_panel.alarm
      to: triggered
    action:
    - service: camera.snapshot
      data:
        entity_id: camera.garden
        filename: /tmp/ipcamera_snapshot.jpg
    - service: notify.pushbullet
      data:
        title: Alarm triggered!
        message: '{{ states.input_text.text_alarm.state }}'
        data:
          file: /tmp/ipcamera_snapshot.jpg

Well, these are the things that I’ve checked and work:

  • arm/disarm alarm
  • sensors
  • camera and pushbullet notifications

When the sensor changes its state to ‘on’ (by itself or forcing it using the HA debug tools) the alarm doesn’t trigger.

Is there something obvious I’m missing?

automation:
  - id: alarm_triggered_armed_home
    alias: Trigger alarm while armed home
    trigger:
    - entity_id: binary_sensor.radar_west
      platform: state
      to: 'On'

Change to: 'On' to to: 'on' (lowercase)