Connecting Bluetooth headset to an embedded Linux device

[lino_lastella]

Hello.

I am trying to play some audio files from my Bluetooth headset in a Qt Application running on an embedded Linux system.

So far I managed to pair and connect the device using the following code:

/*use a discovery agent to find the device*/
deviceDiscAgent = new QBluetoothDeviceDiscoveryAgent(this);
    connect(deviceDiscAgent, SIGNAL(deviceDiscovered(QBluetoothDeviceInfo)),
            this,            SLOT(deviceDiscovered(QBluetoothDeviceInfo)));

/*inside slot, when found my device*/
localDevice->requestPairing(device.address(), QBluetoothLocalDevice::AuthorizedPaired);

/*inside slot callback after pair is successful*/
socket = new QBluetoothSocket(QBluetoothServiceInfo::RfcommProtocol);
socket->connectToService(address, QBluetoothUuid(uuidStr));

/*in callback after connection to socket is successful*/
const auto deviceInfos = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);

    for (const QAudioDeviceInfo &deviceInfo : deviceInfos) qDebug() << "Device name: " << deviceInfo.deviceName();

Now, the listing of output audio device does not include my Bluetooth headset. What am I doing wrong? And if it turns out I can't use the QAudio framework, how can I go about playing a .wav file from the connected socket?

Thanks a lot