home-assistant-blueprints/automation/cast_lovelace_on_motion.yaml

blueprint:
  domain: automation
  name: Cast lovelace on motion detection
  input:
    trigger_sensors:
      name: Trigger sensors
      selector:
        entity:
          multiple: true
          domain: binary_sensor
    media_devices:
      name: Media Devices
      selector:
        entity:
          integration: cast
          multiple: true
    dashboard_path:
      name: Dashboard path
      default: lovelace
      selector:
        text:
          suffix: "http://ha/dashboard-path/view-path"
    dashboard_view:
      name: View path
      selector:
        text:
          suffix: "http://ha/dashboard-path/view-path"

mode: restart
trigger:
  platform: state
  to: "on"
  entity_id: !input trigger_sensors
variables:
  trigger_sensors: !input trigger_sensors
  media_devices: !input media_devices
  dashboard_path: !input dashboard_path
  dashboard_view: !input dashboard_view
action:
  - service: system_log.write
    data:
      level: warning
      message: >-
        Triggered {{ trigger_sensors }}
        For {{ media_devices }}
  - repeat:
      for_each: "{{ media_devices }}"
      sequence:
        - if: "{{ not states(repeat.item) in ['idle', 'playing', 'paused'] }}"
          then:
          - service: system_log.write
            data:
              level: warning
              message: >-
                Display {{ state_attr(repeat.item, "friendly_name") }} is ready for Lovelace «{{ dashboard_path }}/{{ dashboard_view }}».
          - service: media_player.volume_mute
            data:
              is_volume_muted: true
            target:
              entity_id: "{{ repeat.item }}"
          - service: cast.show_lovelace_view
            data:
              entity_id: "{{ repeat.item }}"
              dashboard_path: "{{ dashboard_path }}"
              view_path: "{{ dashboard_view }}"
          - wait_template: >-
              {{ is_state_attr(repeat.item, 'app_name', 'Home Assistant Lovelace' ) }}
          - delay:
              seconds: 2
          - service: media_player.volume_mute
            data:
              is_volume_muted: false
            target:
              entity_id: "{{ repeat.item }}"
          else:
          - service: system_log.write
            data:
              level: warning
              message: >-
                Display {{ state_attr(repeat.item, "friendly_name") }} is playing «{{ state_attr(repeat.item, 'app_name') }}», 
                skipping launching «{{ dashboard_path }}/{{ dashboard_view }}».