Add scene activation example to Qbus integration (#40625)

source/_integrations/qbus.markdown

@@ -102,6 +102,45 @@ actions:
 
 {% endraw %}
 
+### Qbus scene triggers media player
+
+Automations can also be triggered by Qbus scenes. The following automation will play the **Home Assistant Homies** playlist on the media player in the living room.
+
+An extra condition has been added to make sure the automation is not triggered when Home Assistant reboots or when the integration reloads.
+
+Replace `scene.ctd_111111_play_music` with your Qbus scene entity id, `media_player.living_room` with your media player entity id, and fill in the `data` element as desired.
+
+{% raw %}
+
+```yaml
+alias: Play music in living room
+description: ""
+mode: single
+triggers:
+  - trigger: state
+    entity_id:
+      - scene.ctd_111111_play_music
+    from: null
+    to: null
+conditions:
+  - condition: template
+    value_template: >-
+      {{ trigger.from_state is not none and trigger.from_state.state not in
+      ['unavailable', 'unknown'] and trigger.to_state is not none and
+      trigger.to_state.state not in ['unavailable', 'unknown'] }}
+actions:
+  - action: media_player.play_media
+    alias: Play media
+    target:
+      entity_id: media_player.living_room
+    data:
+      enqueue: replace
+      media_content_id: Home Assistant Homies
+      media_content_type: playlist
+```
+
+{% endraw %}
+
 ## Known limitations
 
 The integration does not provide a way to update the firmware on the devices. This can only be done with the configuration software System Manager.