How to specify multiple device capabilities for Bluetooth (Windows Runtime apps)

Question

I am trying to specify two different DeviceCapability 
<m2:DeviceCapability Name="bluetooth.rfcomm">
      <m2:Device Id="any">
        <m2:Function Type="name:serialPort" />
      </m2:Device>
    </m2:DeviceCapability>
    <m2:DeviceCapability Name="bluetooth.genericAttributeProfile">
      <m2:Device Id="any">
        <m2:Function Type="serviceId:00001809-0000-1000-8000-00805f9b34fb" />
        <m2:Function Type="serviceId:00002a19-0000-1000-8000-00805f9b34fb" />
      </m2:Device>
    </m2:DeviceCapability>
Unfortunately it not work for "bluetooth.rfcomm".
Do i need to re-sequence this two DeviceCapability ?

Answer 1

Below is my code that i am using for Bluetooth Printer
private async static Task<bool> VerifyPrinter()
bool isConnected = false;
try
// look for any paired device
PeerFinder.AllowBluetooth = true;
// start looking for BT devices
PeerFinder.Start();
// locate devices that support the serial port profile
PeerFinder.AlternateIdentities["Bluetooth:SDP"] = "{00001101-0000-1000-8000-00805F9B34FB}";
IReadOnlyList<PeerInformation> available_devices;
//Find All paired devices
//NOTE: If device is connected then it won't get that device details here
// Even after that device is paired
try
available_devices = await PeerFinder.FindAllPeersAsync();
catch (Exception exception)
throw;
//Convert available devices to list
var peerDevices = available_devices.ToList();
//Find specific device using mac address
foreach (var item in peerDevices)
if (item.HostName != null)
string result = Regex.Replace(item.HostName.DisplayName, @"[^0-9a-zA-Z]+", string.Empty);
if (result == StaticMembers.PrinterMacAddress)
PeeredPrinter = item;
PrinterHelper.Status = ManagerStatus.Idle;
isConnected = true;
break;
//If Peer is not found then save old mac address
if (PeeredPrinter != null)
await ConnectToPrinter();
catch (Exception ex)
if ((uint)ex.HResult == 0x8007048F)
PrinterHelper.Status = ManagerStatus.LostConnection;
ShowBluetoothcMessageDialog();
else if ((uint)ex.HResult == 0x8007271D)
PrinterHelper.Status = ManagerStatus.LostConnection;
//0x80070005 - previous error code that may be wrong?
StaticMembers.displayMessage("Something went wrong.");
else if ((uint)ex.HResult == 0x80072740)
PrinterHelper.Status = ManagerStatus.FailedToGetConnection;
StaticMembers.displayMessage("The Bluetooth port is already in use.");
else if ((uint)ex.HResult == 0x8007274C)
PrinterHelper.Status = ManagerStatus.FailedToGetConnection;
StaticMembers.displayMessage("Could not connect to the selected Bluetooth Device.\n Please make sure it is switched on.");
else
PrinterHelper.Status = ManagerStatus.LostConnection;
StaticMembers.displayMessage(ex.Message);
return isConnected;
private async static Task ConnectToPrinter()
MessageDialog messageDialog = null;
//Check if lost connection or Failed to connect to device
if (PrinterHelper.Status == ManagerStatus.LostConnection || PrinterHelper.Status == ManagerStatus.FailedToGetConnection)
//ShowBluetoothcMessageDialog();
return;
//If peer is null;
if (PeeredPrinter == null)
StaticMembers.displayMessage("Please setup printer.");
//PrinterHelper.VerifyPrinter(MACAddress); //TODO:Will check this logic
return;
try
//If Bluetooth is idle then connect to printer
if (PrinterHelper.Status == ManagerStatus.Idle)
await streamSocket.ConnectAsync(PeeredPrinter.HostName, PeeredPrinter.ServiceName);
//Update the status of Bluetooth status
PrinterHelper.Status = ManagerStatus.GotConnection;
catch (Exception er)
PrinterHelper.Status = ManagerStatus.LostConnection;
StaticMembers.displayMessage("Please check blue-tooth device is turn on or not.");