Chromecast MQTT connector

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

Installation requirements

• Python 3.6+
• 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/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 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"]. You can also just 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.

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