A2DP

Revision as of 22:36, 8 August 2009

The A2DP bluetooth profile allows high quality audio to be transferred from the phone.

This page describes how to setup A2DP on the Freerunner.

How to setup A2DP manually

This information is mostly taken from this mail thread. It has been tested on FDOM and FSO milestone 5, but should also work on 2008.12.

1. Check installed packages

First check that you have the correct package versions installed with grep blue. The versions should be these:

bluez-audio - 3.33-r3
bluez-utils - 3.33-r3
bluez-utils-alsa - 3.33-r3
bluez-utils-compat - 3.33-r3
libbluetooth2 - 3.33-r0

1.1 Check installed packages (Bluez4)

For user with bluez4 (SHR-unstable ecc.) bluez-audio 3.33 and bluez-utils-alsa 3.33 are not compatible with bluez4

bluez4 - 4.30-r1 
connman-plugin-bluetooth - 0.10-r0 - 
kernel-module-bluetooth - 2.6.28-oe1+xxxxx 
libasound-module-bluez - 4.30-r0 
libbluetooth2 - 3.33-r0

If you are willing to risk your installationand want to stay on bluez3, you can remove bluez4 to resolve this issue by doing

opkg remove -recursive bluez4

(will also remove connman-plugin-bluetooth). After that you need to edit /etc/init.d/bluetooth and replace DAEMON_NAME=bluetoothd with DAEMON_NAME=hcid. This has been tested and works on FSO MS5.

2. Add bluetooth device to /etc/asound.conf

Your /etc/asound.conf should contain these:

pcm.!default {
   type plug
   slave.pcm "dmix"
}

ctl.mixer0 {
   type hw
   card 0
}

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

XX:XX:XX should be replaced with your device ID.

3. Connect to the device

Turn on bluetooth in the GUI and then do

export DEVICE=XX:XX:XX:XX:XX:XX

/etc/init.d/bluetooth stop
/etc/init.d/bluetooth start

passkey-agent --default 0000 &

dbus-send --system --type=method_call --print-reply --dest=org.bluez \
  /org/bluez/hci0 org.bluez.Adapter.CreateBonding string:$DEVICE

dbus-send --system --print-reply --dest=org.bluez \
  /org/bluez org.bluez.Manager.ActivateService string:audio

dbus-send --system --type=method_call --print-reply --dest=org.bluez \
  /org/bluez/audio org.bluez.audio.Manager.CreateDevice string:$DEVICE

dbus-send --system --type=method_call --print-reply --dest=org.bluez \
  "/org/bluez/audio/device0" org.bluez.audio.Sink.Connect

If the last step fails, see to it that the device returned in the step before is device0 - otherwise use the other number.

3.1 Connect to the device (Bluez4)

Turn on bluetooth in the GUI and then pair with simple-agent (passkey-agent from bluez-utils 3.33 won't work) simple-agent is included in bluez4 source package (src folder) or you can find it there : http://shr-project.org/trac/wiki/Using

/etc/init.d/bluetooth stop
/etc/init.d/bluetooth start

python simple-agent hci0 XX:XX:XX:XX:XX:XX

Response is something like this :

RequestPinCode (/org/bluez/XXXX/hci0/dev_XX_XX_XX_XX_XX_XX)
Enter PIN Code: XXXX
Release
New device (/org/bluez/XXXX/hci0/dev_XX_XX_XX_XX_XX_XX)

Now you can start playing, no need to connect manualy.

4. Start playing

To play a file with mplayer use the following command:

mplayer -ao alsa:device=bluetooth /path/to/file.ogg

5. Potential troubles

• If you experience problems with choppiness, try changing your hcid.conf to include "lm accept,master;" and "lp hold,sniff,park;" You may also have to bond (commonly known as 'pairing') your phone and your headset. See http://wiki.bluez.org/wiki/HOWTO/Bonding for details. Mercury 17:36, 5 September 2008 (UTC)

6. Devices that work

Note: None of the above headsets have been tested with GSM calls unless that is explicitely mentioned.