32feet bluetooth client fails to connect

Question

I'm trying to communicate with a bluetooth device as a client using 32feet.NET. The device is actually a microcontroller with a bluetooth module but currently I'm using my windows phone for testing. The devices are already paired and here's what I did. (devinfo is the DeviceInfo of the selected device)

private void ClientConnect()
{
    var client = new BluetoothClient();
    client.SetPin("pin used for pairing");
    client.BeginConnect(devInfo.DeviceAddress, BluetoothService.SerialPort, BluetoothClientConnectCallback, client);
}

private void BluetoothClientConnectCallback(IAsyncResult ar)
{
    var bluetoothClient = ar.AsyncState as BluetoothClient;
    bluetoothClient.EndConnect(ar);
    UpdateUI("Connected");

    var stream = bluetoothClient.GetStream();
...

But at this point: bluetoothClient.EndConnect(ar); I always get a SocketException mostly saying: "The requested address is not valid in its context"

and rarely it says:

"A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond"

Could you suggest something that might cause the issue?

Answer 1

For me was enough to change the line at the beginning of the connection with

client.BeginConnect(info.DeviceAddress, BluetoothService.SerialPort,
new AsyncCallback(BCCCallback), client);

it just had to be an asyncCallback