PocketCHIP Bluez 5.23 A2DP to headset for audio
The reason for this post is to find a baseline for the actual bluetooth hardware on the PocketCHIP and see if bluez works properly on the device at all.
PocketCHIP is Jessie Debian based, I needed this information here, which I will build upon;
https://wiki.debian.org/BluetoothUser/a2dp
sudo apt-get install pulseaudio pulseaudio-module-bluetooth pavucontrol bluez-firmware
sudo service bluetooth restart
killall pulseaudio
sudo vi /etc/bluetooth/main.conf
Added “Enabled=Source,Sink” in [General] Section
reboot
sudo vi /etc/pulse/default.pa
load-module module-switch-on-connect
I needed a music player, this seemed great for this platform;
sudo apt-get install moc
mocp is command line to start it.
The sequence goes like this;
bluetoothctl to scan/trust/pair the a2dp headset
pacmd list sinks (sinks are outputs)
and
pactl set-default-sink bluez-device
pacmd list sinks | grep blue
Default sink name: bluez_sink.30_21_0A_30_06_CC
name: <module-bluetooth-policy>
module.description = “When a bluetooth sink or source is added, load module-loopback”
name: <module-bluetooth-discover>
name: <module-bluez5-discover>
name: <module-bluez4-discover>
name: <module-bluez5-device>
argument: <path=/org/bluez/hci0/dev_30_21_0A_30_06_CC>
name: <bluez_sink.30_21_0A_30_06_CC>
driver: <module-bluez5-device.c>
card: 1 <bluez_card.30_21_0A_30_06_CC>
bluetooth.protocol = “a2dp_sink”
device.api = “bluez”
device.bus = “bluetooth”
bluez.path = “/org/bluez/hci0/dev_30_21_0A_30_06_CC”
bluez.class = “0x240408”
bluez.alias = “BTH175”
device.icon_name = “audio-handsfree-bluetooth”
name: <bluez_sink.30_21_0A_30_06_CC.monitor>
driver: <module-bluez5-device.c>
card: 1 <bluez_card.30_21_0A_30_06_CC>
device.api = “bluez”
device.bus = “bluetooth”
bluez.path = “/org/bluez/hci0/dev_30_21_0A_30_06_CC”
bluez.class = “0x240408”
bluez.alias = “BTH175”
device.icon_name = “audio-handsfree-bluetooth”
name: <bluez_card.30_21_0A_30_06_CC>
driver: <module-bluez5-device.c>
device.api = “bluez”
device.bus = “bluetooth”
bluez.path = “/org/bluez/hci0/dev_30_21_0A_30_06_CC”
bluez.class = “0x240408”
bluez.alias = “BTH175”
device.icon_name = “audio-handsfree-bluetooth”
bluez_sink.30_21_0A_30_06_CC/#1: BTH175
bluez_sink.30_21_0A_30_06_CC.monitor/#2: Monitor of BTH175
chip@chip:~$ pactl set-default-sink bluez_sink.30_21_0A_30_06_CC
mocp
Notes on quality, pops in sound etc;
Worked great.
Sounded great.
It continually streamed properly like you would expect for a commercial device. 20+ minutes no issues.
PocketCHIP turned its display off and the audio kept playing.
Conclusions for this single test: A2DP wireless headsets can be used for PocketCHIP reliably. The games will also use the pulseaudio default sink thru A2DP/Bluetooth which is great (no wires needed). With the Jessie provided Bluez 5.23 to boot.
