Bluetooth LE, android/iOS

[bounce]

Hi everyone,

I have been developing an app for android first and iOS.
Let says that my app is working as desired. But it's not stable. I'll explain.

I do have 1 service. 4 characteristics, 1 characteristic I enable notification.

On android 5, I have to disable and enable the bluetooth peripheral to make my app find my device. But with this trick, my app works 100% (as expected)
On android 6, disabling enabling the bluetooth isn't enough. I need to unpair manually the device to get notification working.
On iOS, I have to disable manualy the bluetooth to get notification working. (as I can't disable bluetooth by Qt)

I'm aware this isn't good to disable enable bluetooth, but this is the only way I found to get it working.

Also I did find a post where it says that i have to disable notification to get a proper disconnection.
That's what I do, but when I check if notification is valid line 53 on the code below, it says "false". but if I test if the service I have stored contains notification. I have a "true".
I found this a bit wired.

Thanks


I did post some of my code.
Let me know if you want more.

bool JTBLEObject::connectToDevice()
{
    bool ret = false;
 
    if(controller){
        delete controller;
    }
 
    controller = new QLowEnergyController(*info,this);
 
    if(controller)
    {
        connect(controller, SIGNAL(connected()),
                this, SLOT(deviceConnected()));
        connect(controller, SIGNAL(error(QLowEnergyController::Error)),
                this, SLOT(errorReceived(QLowEnergyController::Error)));
        connect(controller, SIGNAL(disconnected()),
                this, SLOT(deviceDisconnected()));
        connect(controller, SIGNAL(serviceDiscovered(QBluetoothUuid)),
                this, SLOT(addLowEnergyService(QBluetoothUuid)));
        connect(controller, SIGNAL(discoveryFinished()),
                this, SLOT(serviceScanDone()));
 
        toTimer.setInterval(CONTROLLER_CONNECT_TO);
        toTimer.start();
        controller->connectToDevice();
        set_status(Connecting);
        ret = true;
    }
    return ret;
}
 
 
void JTBLEObject::deviceConnected()
{
    toTimer.start();
    discoverServiceTimer.start();
    controller->discoverServices();
    set_status(ServDiscovering);
 
}
 
 
void JTBLEObject::deviceDisconnected(){
 
 
    // Status could be in "Detected" as a micro connection can happen. So remove only if the status is "Connected"
    if(get_status() == Connected){
 
        set_running(false);
        set_expanded(false);
 
        qDebug() << "notification.isValid()" << notification.isValid();
 
        if(serviceList.value(QBluetoothUuid(QString(THERAPY_SERVICE_UUID)))){
            QLowEnergyService* m_service = serviceList.value(QBluetoothUuid(QString(THERAPY_SERVICE_UUID)));
            qDebug() << "service contains" << m_service->contains(notification);
            qDebug() << "service error" << m_service->error();
            m_service->writeDescriptor(notification, QByteArray::fromHex("0000"));
 
 
        }
 
        batteryReadTimer.stop();
 
        set_status(Removing);
 
        emit bleControllerEvent();
    }
 
}
 
 
void JTBLEObject::connectToService(QLowEnergyService* service)
{
    discoverServiceTimer.stop();
 
    if(service->state() == QLowEnergyService::DiscoveryRequired)
    {
        connect(service, SIGNAL(stateChanged(QLowEnergyService::ServiceState)),
            this, SLOT(serviceDetailsDiscovered(QLowEnergyService::ServiceState)));
 
        connect(service, SIGNAL(characteristicRead(const QLowEnergyCharacteristic&, const QByteArray&)),
            this, SLOT(readCharacteristicsFromBLE(const QLowEnergyCharacteristic&, const QByteArray&)));
 
        connect(service, SIGNAL(characteristicChanged(const QLowEnergyCharacteristic&, const QByteArray&)),
            this, SLOT(readCharacteristicsFromBLE(const QLowEnergyCharacteristic&, const QByteArray&)));
 
        service->discoverDetails();
 
        set_status(CharDiscovering);
    }
 
}
 
 
 
void JTBLEObject::readCharacteristicsFromBLE(const QLowEnergyCharacteristic& carac, const QByteArray& data)
{
    if(carac.uuid() == QBluetoothUuid(QString(PROGRAM_MSB_UUID))){
.
.
.
     }
    else if(carac.uuid() == QBluetoothUuid(QString(THERAPY_PROGRAM_LSB_UUID)))
    {
        char tempData[16];
        int max = data.size() > 16 ? 16 : data.size();
        for(int i=0; i < max;  i++)
        {
            tempData[i] = data.at(i);
        }
 
        set_timeValue(((quint8)tempData[1]) << 8 | ((quint8)tempData[2]));
        set_running((tempData[3] & 0x01) == 0x01);
 
        if(!notification.isValid()){
           notification = carac.descriptor(QBluetoothUuid::ClientCharacteristicConfiguration);
           if (notification.isValid())
             {
                 QLowEnergyService *service = qobject_cast<QLowEnergyService *>(sender());
                 service->writeDescriptor(notification, QByteArray::fromHex("0100"));
                 qDebug() << "Enable Notification on Status - OK";
             }
         }
    }
    else if(carac.uuid() == QBluetoothUuid::BatteryLevel)
    {
        this->set_batteryValue(data.at(0) & 0x7F);
        this->set_batteryCharging((data.at(0) & 0x80) == 0x80);
    }
 
    batteryReadTimer.start();
 
}

bool JTBLEObject::connectToDevice()
{
    bool ret = false;

    if(controller){
        delete controller;
    }

    controller = new QLowEnergyController(*info,this);

    if(controller)
    {
        connect(controller, SIGNAL(connected()),
                this, SLOT(deviceConnected()));
        connect(controller, SIGNAL(error(QLowEnergyController::Error)),
                this, SLOT(errorReceived(QLowEnergyController::Error)));
        connect(controller, SIGNAL(disconnected()),
                this, SLOT(deviceDisconnected()));
        connect(controller, SIGNAL(serviceDiscovered(QBluetoothUuid)),
                this, SLOT(addLowEnergyService(QBluetoothUuid)));
        connect(controller, SIGNAL(discoveryFinished()),
                this, SLOT(serviceScanDone()));

        toTimer.setInterval(CONTROLLER_CONNECT_TO);
        toTimer.start();
        controller->connectToDevice();
        set_status(Connecting);
        ret = true;
    }
    return ret;
}


void JTBLEObject::deviceConnected()
{
    toTimer.start();
    discoverServiceTimer.start();
    controller->discoverServices();
    set_status(ServDiscovering);

}


void JTBLEObject::deviceDisconnected(){


    // Status could be in "Detected" as a micro connection can happen. So remove only if the status is "Connected"
    if(get_status() == Connected){

        set_running(false);
        set_expanded(false);

        qDebug() << "notification.isValid()" << notification.isValid();

        if(serviceList.value(QBluetoothUuid(QString(THERAPY_SERVICE_UUID)))){
            QLowEnergyService* m_service = serviceList.value(QBluetoothUuid(QString(THERAPY_SERVICE_UUID)));
            qDebug() << "service contains" << m_service->contains(notification);
            qDebug() << "service error" << m_service->error();
            m_service->writeDescriptor(notification, QByteArray::fromHex("0000"));


        }

        batteryReadTimer.stop();

        set_status(Removing);

        emit bleControllerEvent();
    }

}


void JTBLEObject::connectToService(QLowEnergyService* service)
{
    discoverServiceTimer.stop();

    if(service->state() == QLowEnergyService::DiscoveryRequired)
    {
        connect(service, SIGNAL(stateChanged(QLowEnergyService::ServiceState)),
            this, SLOT(serviceDetailsDiscovered(QLowEnergyService::ServiceState)));

        connect(service, SIGNAL(characteristicRead(const QLowEnergyCharacteristic&, const QByteArray&)),
            this, SLOT(readCharacteristicsFromBLE(const QLowEnergyCharacteristic&, const QByteArray&)));

        connect(service, SIGNAL(characteristicChanged(const QLowEnergyCharacteristic&, const QByteArray&)),
            this, SLOT(readCharacteristicsFromBLE(const QLowEnergyCharacteristic&, const QByteArray&)));

        service->discoverDetails();

        set_status(CharDiscovering);
    }

}



void JTBLEObject::readCharacteristicsFromBLE(const QLowEnergyCharacteristic& carac, const QByteArray& data)
{
    if(carac.uuid() == QBluetoothUuid(QString(PROGRAM_MSB_UUID))){
.
.
.
     }
    else if(carac.uuid() == QBluetoothUuid(QString(THERAPY_PROGRAM_LSB_UUID)))
    {
        char tempData[16];
        int max = data.size() > 16 ? 16 : data.size();
        for(int i=0; i < max;  i++)
        {
            tempData[i] = data.at(i);
        }

        set_timeValue(((quint8)tempData[1]) << 8 | ((quint8)tempData[2]));
        set_running((tempData[3] & 0x01) == 0x01);

        if(!notification.isValid()){
           notification = carac.descriptor(QBluetoothUuid::ClientCharacteristicConfiguration);
           if (notification.isValid())
             {
                 QLowEnergyService *service = qobject_cast<QLowEnergyService *>(sender());
                 service->writeDescriptor(notification, QByteArray::fromHex("0100"));
                 qDebug() << "Enable Notification on Status - OK";
             }
         }
    }
    else if(carac.uuid() == QBluetoothUuid::BatteryLevel)
    {
        this->set_batteryValue(data.at(0) & 0x7F);
        this->set_batteryCharging((data.at(0) & 0x80) == 0x80);
    }

    batteryReadTimer.start();

}

To copy to clipboard, switch view to plain text mode 

[bounce]

Yeay, No body ?

[anda_skoa]

Maybe nobody has tried this before, but it could also be that the people who haven't visited the forum yet.
After all this is vacation season.

I am moving the thread to the mobile forum, just in case.

Cheers,
_