How to get the state attr from a device_id?

Hi, I try to get the current volume of a media_player entity. But in the Blueprint I only get the device_ID not the entity_id. Is it not possible to get the state or attributes from a device_ID?

blueprint:
  name: deCONZ - IKEA five button remote for SONOS
  description: 'Control SONOS with an IKEA five button remote (the round ones).'
  domain: automation
  input:
    remote:
      name: Remote
      description: IKEA remote to use
      selector:
        device:
          integration: deconz
          manufacturer: IKEA of Sweden
          model: TRADFRI remote control
    speaker:
      name: Speaker
      description: The speaker to control
      selector:
        entity:
          domain: media_player
    force_volume:
      name: Force turn on volume
      description: 'Force the volume to the set level below, when the on button on the remote is pushed and speaker turn on.'
      default: false
      selector:
        boolean: {}
    volume:
      name: Volume
      description: Volume of the speaker when turning on
      default: 0.1
      selector:
        number:
          min: 0.0
          max: 1
          mode: slider
          step: 0.1
          unit_of_measurement: '%'
  source_url: https://test.test
mode: restart
max_exceeded: silent
variables:
  force_volume: !input 'force_volume'
  speaker_entity: !input 'speaker'
trigger:
- platform: event
  event_type: deconz_event
  event_data:
    device_id: !input 'remote'
action:
- variables:
    event: '{{ trigger.event.data.event }}'
- choose:
  - conditions:
    - '{{ event == 1002 }}'
    sequence:
    - choose:
      - conditions: '{{ force_volume }}'
        sequence:
        - service: media_player.media_play_pause
          target: !input 'speaker'
        - service: media_player.volume_set
          target: !input 'speaker'
          data:
            volume_level: !input 'volume'
      default:
      - service: media_player.media_play_pause
        target: !input 'speaker'
  - conditions:
    - '{{ event == 2002 }}'
    sequence:
blueprint:
  name: deCONZ - IKEA five button remote for SONOS
  description: 'Control SONOS with an IKEA five button remote (the round ones).'
  domain: automation
  input:
    remote:
      name: Remote
      description: IKEA remote to use
      selector:
        device:
          integration: deconz
          manufacturer: IKEA of Sweden
          model: TRADFRI remote control
    speaker:
      name: Speaker
      description: The speaker to control
      selector:
        entity:
          domain: media_player
    force_volume:
      name: Force turn on volume
      description: 'Force the volume to the set level below, when the on button on the remote is pushed and speaker turn on.'
      default: false
      selector:
        boolean: {}
    volume:
      name: Volume
      description: Volume of the speaker when turning on
      default: 0.1
      selector:
        number:
          min: 0.0
          max: 1
          mode: slider
          step: 0.1
          unit_of_measurement: '%'
    button_left_short:
      name: Left button - short press
      description: Action to run on short left button press
      default: []
      selector:
        action: {}
    button_left_long:
      name: Left button - long press
      description: Action to run on long left button press
      default: []
      selector:
        action: {}
    button_right_short:
      name: Right button - short press
      description: Action to run on short right button press
      default: []
      selector:
        action: {}
    button_right_long:
      name: Right button - long press
      description: Action to run on long right button press
      default: []
      selector:
        action: {}
  source_url: https://test.test
mode: restart
max_exceeded: silent
variables:
  force_volume: !input 'force_volume'
  speaker_entity: !input 'speaker'
trigger:
- platform: event
  event_type: deconz_event
  event_data:
    device_id: !input 'remote'
action:
- variables:
    event: '{{ trigger.event.data.event }}'
- choose:
  - conditions:
    - '{{ event == 1002 }}'
    sequence:
    - choose:
      - conditions: '{{ force_volume }}'
        sequence:
        - service: media_player.media_play_pause
          target: !input 'speaker'
        - service: media_player.volume_set
          target: !input 'speaker'
          data:
            volume_level: !input 'volume'
      default:
      - service: media_player.media_play_pause
        target: !input 'speaker'
#     - service: media_player.volume_set
#        target: !input 'speaker'
#        data:
#          volume_level: !input 'volume'
  - conditions:
    - '{{ event == 2002 }}'
    sequence:
    - variables:
        cv: '{{ state_attr( speaker_entity, "volume_level") }}'

The line:

    - variables:
        cv: '{{ state_attr( speaker_entity, "volume_level") }}'

Gives me an error in the logs:

Logger: homeassistant.components.automation.deconz_ikea_five_button_remote_for_sonos
Source: helpers/template.py:355
Integration: Automatisierung ([documentation](https://www.home-assistant.io/integrations/automation), [issues](https://github.com/home-assistant/home-assistant/issues?q=is%3Aissue+is%3Aopen+label%3A%22integration%3A+automation%22))
First occurred: 10:00:38 (7 occurrences)
Last logged: 10:25:45

While executing automation automation.deconz_ikea_five_button_remote_for_sonos

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 353, in async_render
    render_result = compiled.render(kwargs)
  File "/usr/local/lib/python3.8/site-packages/jinja2/environment.py", line 1090, in render
    self.environment.handle_exception()
  File "/usr/local/lib/python3.8/site-packages/jinja2/environment.py", line 832, in handle_exception
    reraise(*rewrite_traceback_stack(source=source))
  File "/usr/local/lib/python3.8/site-packages/jinja2/_compat.py", line 28, in reraise
    raise value.with_traceback(tb)
  File "<template>", line 1, in top-level template code
  File "/usr/local/lib/python3.8/site-packages/jinja2/sandbox.py", line 407, in getattr
    value = getattr(obj, attribute)
jinja2.exceptions.UndefinedError: homeassistant.helpers.template.AllStates object has no element {'device_id': '8367cede114611eb9805210d516375b3'}

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/automation/__init__.py", line 404, in async_trigger
    await self.action_script.async_run(
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 1026, in async_run
    await asyncio.shield(run.async_run())
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 242, in async_run
    await self._async_step(log_exceptions=False)
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 250, in _async_step
    await getattr(
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 664, in _async_variables_step
    self._variables = self._action[CONF_VARIABLES].async_render(
  File "/usr/src/homeassistant/homeassistant/helpers/script_variables.py", line 58, in async_render
    rendered_variables[key] = template.render_complex(value, rendered_variables)
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 98, in render_complex
    return value.async_render(variables)
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 355, in async_render
    raise TemplateError(err) from err
homeassistant.exceptions.TemplateError: UndefinedError: homeassistant.helpers.template.AllStates object has no element {'device_id': '8367cede114611eb9805210d516375b3'}

There’s no link between devices and entities in templates.

So there is no way to get the state or attribute of the selected media_player?

You’d have to see if that information is contained in the trigger event data.

Can you show me an exaple please?

Uh, events don’t have examples. You have to look at the data yourself.

subscribe to this event and try and find the info

- platform: event
  event_type: deconz_event
  event_data:
    device_id: !input 'remote'