QT 5.5: QLowEnergyControllerPrivate::connectToDevice(): Not implemented

Encya

Hi,

After buying a Raspberry Pi 2 and using debian wheezy I finally got the blue tooth modules compiled. However I am facing a new problem while using the QLowEnergyController.

After searching for blue tooth LE devices using the QBluetoothDeviceDiscoveryAgent class I am trying to connect using the energycontroller the following error occurs : QLowEnergyControllerPrivate::connectToDevice(): Not implemented.

The code I'm using:

void Quart::addDevice(const QBluetoothDeviceInfo &device)
{
    if(device.coreConfigurations() & QBluetoothDeviceInfo::LowEnergyCoreConfiguration){
        qDebug() << "Found new device:" << device.name() << '(' << device.address().toString() << ')';

        QLowEnergyController *control = new QLowEnergyController(device, this);
        connect(control, SIGNAL(serviceDiscovered(QBluetoothUuid)),
                this, SLOT(serviceDiscovered(QBluetoothUuid)));
        connect(control, SIGNAL(discoveryFinished()),
                this, SLOT(serviceScanDone()));
        connect(control, SIGNAL(error(QLowEnergyController::Error)),
                this, SLOT(controllerError(QLowEnergyController::Error)));
        connect(control, SIGNAL(connected()),
                this, SLOT(deviceConnected()));
        connect(control, SIGNAL(disconnected()),
                this, SLOT(deviceDisconnected()));

        control->setRemoteAddressType(QLowEnergyController::RandomAddress);
        control->connectToDevice();
    }
}

Looking in the source code of qt(5.5) I found 2 files: QLowEnergyController.cpp which contains the correct code(I think) and QLowEnergyController_p.cpp which contains nothing but some code to pass units tests and:

qWarning() << "QLowEnergyControllerPrivate::connectToDevice(): Not implemented";
setError(QLowEnergyController::UnknownError);

Could it some how be using the wrong files? I'm am totally lost from this point.

SGaist

Hi,

Since you are running linux on the Raspberry Pi 2, you are probably running Bluez on it. If so, you should take a look at qlowerenergycontroller_bluez.cpp

Hope it helps

Encya

It is correct that I am using Bluez(5.3.7). I look at the qlowerenergycontroller_bluez.cpp file and it seems that it is the one I need. But when I look at the makefile file I can only see references to qlowerenergycontroller_p.cpp.
qlowerenergycontroller_bluez.cpp is not mentioned once.

I also looked at the output of my make file and there I saw an error saying my bluez version is to low to support low energy. Assuming Qt is using pkg-config I ran pkg-config --modversion bluez which gave me version 4.99 while I have installed 5.37. Could that be my problem? To fix this I placed the bluez.pc file in to /usr/lib/pkgconfig and put it in the PKG_CONFIG_PATH variable.

When I run pkg-config --moversion bluez I gives me 5.37. I am going to recompile everything and will let you know if this solved anything.

Encya

This was indeed the problem. After setting the correct pkg-config for the bluez package and recompiling qt's source I can send and receive messages with the blue tooth modules.

SGaist

Great !

Thanks for sharing the solution :)