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Chromecast MQTT connector

Provides status information and control capabilities of your Chromecast devices via MQTT.

Installation requirements

  • Python 3.7+
  • pychromecast
  • paho-mqtt

You can install the requirements in their correct versions using pip3 install -r requirements.txt.

Discovery and control

Using MQTT you can find the following topics. friendly_name is the name used to connect to each Chromecast.

# - read only
chromecast/friendly_name/friendly_name
chromecast/friendly_name/model_name
chromecast/friendly_name/address
chromecast/friendly_name/connection_status
chromecast/friendly_name/cast_type
chromecast/friendly_name/current_app
chromecast/friendly_name/player_duration
chromecast/friendly_name/player_position
chromecast/friendly_name/player_state
chromecast/friendly_name/volume_level
chromecast/friendly_name/volume_muted
chromecast/friendly_name/media/title
chromecast/friendly_name/media/album_name
chromecast/friendly_name/media/artist
chromecast/friendly_name/media/album_artist
chromecast/friendly_name/media/track
chromecast/friendly_name/media/images
chromecast/friendly_name/media/content_type
chromecast/friendly_name/media/content_url

# - writable
chromecast/friendly_name/command/volume_level
chromecast/friendly_name/command/volume_muted
chromecast/friendly_name/command/player_position
chromecast/friendly_name/command/player_state

Control the player by publishing values to the four topics above.

Change volume using values from 0 to 100:

  • Absolute: publish e.g. 55 to chromecast/friendly_name/command/volume_level
  • Relative: publish e.g. +5 or -5 to chromecast/friendly_name/command/volume_level

Change mute state: publish 0 or 1 to chromecast/friendly_name/command/volume_muted.

Play something: Publish a URL to player_state (just as string, not as json array, e.g. http://your.stream.url.here), the application then tries to guess the required MIME type.

Or you can publish a json array with two elements (content url and content type) to chromecast/friendly_name/command/player_state, e.g. ["http://your.stream.url.here", "audio/mpeg"].

Or you can publish a json object with any of the following properties, e.g. {"url": "http://http://your.stream.url.here", "content_type": "audio/mpeg", "enqueue": false}.

Known properties from pychromecast BaseMediaPlayer.play_media() function:

"url": "http://http://your.stream.url.here"
"content_type": "audio/mpeg"
"title": null
"thumb": null
"current_time": null
"autoplay": true
"stream_type": "BUFFERED"
"metadata": null
"subtitles": null
"subtitles_lang": "en-US"
"subtitles_mime": "text/vtt"
"subtitle_id": 1
"enqueue": false

For other player controls, simply publish e.g. RESUME, PAUSE, STOP, SKIP, REWIND, PREV or NEXT to chromecast/friendly_name/command/player_state. Attention: This is case-sensitive!