I am unsure if this is a driver, windows or a application issue but I was wondering if anyone else has seen anything like this. I have the following code that looks for Bluetooth service that I can connect too (I have extra Debug statements to track
my issue down):
try
{
Debug.WriteLine("***" + serviceInfo.Name + ": " + serviceInfo.Id);
Debug.WriteLine("Getting service");
RfcommDeviceService service = await RfcommDeviceService.FromIdAsync(serviceInfo.Id);
Debug.WriteLine("Got Service");
if (service != null)
{
Debug.WriteLine("----" + service.ToString());
foundDeviceCallback(serviceInfo.Name,_devices);
}
else
{
Debug.WriteLine("fromIdAsync returned null");
}
}
catch (Exception e)
{
Debug.WriteLine(e);
}
This code works perfectly on one tablet that is running “Windows 8.1” with the following Bluetooth drivers:
Provider: Intel
Date: 12/16/2013
Version: 17.0.1401.422
I have another (newer) tablet that will not connect to the same Bluetooth device. This tablet has the same hardware but is running “Windows 8.1 with Bing” and the following Bluetooth drivers:
Provider: Intel
Date: 4/22/2014
Version: 17.0.1405.460
The first time I run the application, on the tablet that will not connect to our Bluetooth device, it asks me if I want to allow the connection and I select yes. After that, every time my application attempts to connect to the Bluetooth device it experiences
one of two issues.
Issue one: Exception thrown:
***XXXXXX:
\\?\BTHENUM#{00001101-0000-1000-8000-00805f9b34fb}_VID&00010047_PID&f000#7&6fe93ec&0&000780668A15_C00000000#{b142fc3e-fa4e-460b-8abc-072b628b3c70}
Getting service
The thread 0xed8 has exited with code 259 (0x103).
The thread 0x17dc has exited with code 259 (0x103).
The thread 0x17e0 has exited with code 259 (0x103).
A first chance exception of type 'System.Exception' occurred in
mscorlib.dll
System.Exception: No such service is known. The service cannot be found
in the specified name space. (Exception from HRESULT: 0x8007277C)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task
task)
at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task)
at
System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at xxxxx.com.xxxxx.bluetooth.xxxx.BluetoothDiscovery.<StartDiscovery>d__0.MoveNext()
Issue two: Null is returned from RfcommDeviceService.FromIdAsync()
Got devices: 1
Found device
***xxxxxxx :
\\?\BTHENUM#{00001101-0000-1000-8000-00805f9b34fb}_VID&00010047_PID&f000#7&6fe93ec&0&000780668A15_C00000000#{b142fc3e-fa4e-460b-8abc-072b628b3c70}
Getting service
Got Service
fromIdAsync returned null
I did attempt to downgrade the Bluetooth drivers with ones that I downloaded from Intel’s site but the installer will not let me downgrade the drivers. I did try several older versions of my application on the newer tablet but get the same issues.
Has anyone seen an issue like this? Does anyone have any suggestions on what I might try to get my application to work on the newer tablet?
Thanks,
Jon
