btscanner example does not work, cannot find BLE host device

[Sen Li]

Hi,

I am a newbie working on BLE examples; however none of the BLE examples work on both of my desktop with CyPress BLE dongle and my laptop.

Could anyone help me and tell what is happening?

I did a little modification on the btscanner example, and here is my own codes:

QString localDeviceName;
QBluetoothAddress dongleAddress;
QBluetoothHostInfo dongleHostInfo;

// Check if Bluetooth is available on this device
QList<QBluetoothHostInfo> dongleHostInfoList = QBluetoothLocalDevice::allDevices();

if (dongleHostInfoList.count() > 1){
    QStringList dongleNameStringList;
    for (int n=0; n<dongleHostInfoList.count(); n++){
        dongleNameStringList << dongleHostInfoList.at(n).name();
    }
    QString dongleNameString = QInputDialog::getItem(0, QString("Sen Dongle Select"), QString("Please select your BLE Dongle."), dongleNameStringList, 0, false);
    dongleAddress = dongleHostInfoList.at(dongleNameStringList.indexOf(dongleNameString)).address();
} else if(dongleHostInfoList.count() == 1){
    dongleAddress = dongleHostInfoList.at(0).address();
}else   {
    qDebug() << QString ("No Device Detected");
}

localDevice = new QBluetoothLocalDevice(dongleAddress);

---

Unfortunately, I never find my BLE host device.

Please help me.

Thank you!

[yeckel]

Hi Sen,
What is the OS you are running your code? Does the BT device work (in Linux commands like $hcitool dev; $hcitool scan).

[mrdebug]

Me too. I use the linux command line tools to scan and than Qt to manage the ble.

[Sen Li]

@yeckel said:

oes the BT device work

I just figured it out that Qt does not support windows.
I am going to install Linux as a second OS.

Do you have any suggestion?

Thank you!

[yeckel]

Yep It's not supported on Windows. Easiest is to use Ubuntu. You should be able to install it in for example VirtualBox and share the USB device there.