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Mopidy extension for managing bluetooth devices
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README.rst

Mopidy-BTManager

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Mopidy extension for bluetooth device management.

Installation

Install by running:

pip install Mopidy-BTManager

Or, if available, install the Debian/Ubuntu package from apt.mopidy.com.

Configuration

Dbus

Before starting Mopidy, you must ensure the 'audio' user group has dbus permissions for managing bluetooth devices. This can be done by adding the following policy section into the file /etc/dbus-1/system.d/bluetooth.conf:

<!-- allow users of audio group to communicate with bluetoothd -->
<policy group="audio">
    <allow send_destination="org.bluez"/>
</policy>

Extension

Add the following section to your Mopidy configuration file following installation:

[btmanager]
enabled = true
name = mopidy
pincode = 1111
autoconnect = true
attach_audio_sink = false

The pincode setting is required when pairing devices with a keypad (e.g., AV remote control). The same pincode value must be entered during the pairing process.

The name setting is the bluetooth network name that is announced to devices wishing to connect to Mopidy. You can change it to anything you wish.

The autoconnect setting tells the extension to automatically connect paired devices as soon as they are discovered. This can be useful if you have already paired a device and don't wish to use the HTTP API to connect it each time you start Mopidy.

The attach_audio_sink option allows the extension to attempt to dynamically attach an audio sink into the GStreamer audio output subsystem, where supported.

Bluetooth Audio

You need a /etc/bluetooth/audio.conf file setup for mopidy-btmanager to work correctly. This file tells the bluetooth daemon how you want your audio connections to be setup. Here's the required content:

[General]
Enable=Source,Sink,Control,Media
Master=true
Disable=
SCORouting=HCI
AutoConnect=false

[Headset]
HFP=false
MaxConnected=1
FastConnectable=false

[A2DP]
SBCSources=1
MPEG12Sources=0
MaxConnected=1

Note: If you wish to use the gstreamer bluetooth plugin then you also need to add Socket to the Enable option list. Do not add this option unless you plan to use the gstreamer bluetooth plugin. Note: If you are enabling attach_audio_sink then you must ensure Socket is enabled.

Audio Rendering

The mopidy-btmanager extension will allow the user to establish bluetooth connections to A2DP audio sources and sinks. However, by default, in order to route audio to an audio sink, you will require a separate entity that is able to push Mopidy audio onto the available bluetooth media (A2DP) transport. There are a number of different ways of doing this:

  1. Use the mopidy-pulseaudio extension

The main advantage of using mopidy-pulseaudio is that it can dynamically render audio from Mopidy directly to newly connected audio sinks without any changes being require to the Mopidy audio configuration subsystem. Moreover, it can be configured also to attach audio sources to audio sinks without user intervention e.g., you wish to play music from your iPhone over bluetooth rather than playing from Mopidy.

Refer to <https://github.com/liamw9534/mopidy-pulseaudio> for more details about using PulseAudio with Mopidy.

2. Create a configuration entry in your asound.rc ALSA configuration file for each bluetooth device you have e.g.,

pcm.bluetooth_speaker_1 {
type bluetooth device "XX:XX:XX:XX:XX:XX" profile "auto"

}

[(XX:XX:XX:XX:XX:XX should be substituted for the bluetooth device address]

And then set output as follows in your Mopidy audio configuration:

output = alsasink device=bluetooth_speaker_1

3. Use the gstreamer bluetooth plugin and set your audio output configuration in mopidy to the following:

output = sbcenc ! a2dpsink device=XX:XX:XX:XX:XX:XX async-handling=true

[(XX:XX:XX:XX:XX:XX should be substituted for the bluetooth device address]

Note: At present mopidy does not support dynamic audio sink selection in its audio subsystem. However, where this feature is supported, the attach_audio_sink option may be enabled to attach an audio sink dynamically for bluetooth devices when they are detected. Otherwise, this means that any sink must be chosen 'a priori' as part of the audio output configuration, when using the ALSA sink or gstreamer audio rendering methods.

Input Control

This mopidy-btmanager extension will allow the user to establish bluetooth connections to AVRCP compatible devices designed for music players. There are many such devices on the market e.g., http://www.amazon.co.uk/Trust-Wireless-Remote-Control-iPad/dp/B005F5CK26

However, the AVRCP commands issued by an input device are not intercepted by the mopidy-btmanager extension. A separate extension is used for this called mopidy-evtdev which is designed to intercept any keypress events from virtual input devices that attach to the OS.

Refer to <https://github.com/liamw9534/mopidy-evtdev> for more details about using virtual input devices with Mopidy.

Project resources

Changelog

v0.1.0 (UNRELEASED)

  • Initial release.
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