找不到蓝牙设备的ID

我正在尝试通过蓝牙连接到Arduino使用visual studio 2013, windows phone应用程序…

当我使用以下代码时，我可以找到没有任何问题的设备，得到一个错误说"Element not found":

await socket.ConnectAsync(MakeBlock.HostName, "5",
                        SocketProtectionLevel.BluetoothEncryptionAllowNullAuthentication);

我试图修改代码以使用RfcommDeviceService来获取服务名称，但来自PeerFinder对象的Id是"并且未能设置connectService。

connectService = RfcommDeviceService.FromIdAsync(MakeBlock.Id);

这是我尝试连接的完整代码:

 #region App to Device....
            PeerFinder.AlternateIdentities["Bluetooth:SDP"] = "{00001101-0000-1000-8000-00805F9B34FB}";
            var pairedDevices = await PeerFinder.FindAllPeersAsync();
            tbLogger.Text = "Seaching for Connections...";
            if (pairedDevices.Count == 0)
            {
                tbLogger.Text = "Makeblock is not found...";
            }
            else
            {
                tbLogger.Text = pairedDevices.Count.ToString() + " connections found!";
                for (int i = 0; i < pairedDevices.Count; i++)
                {
                    PeerInformation selectedPeer = pairedDevices[i];
                    tbLogger.Text = tbLogger.Text + "'r'n" + selectedPeer.DisplayName;
                    if (selectedPeer.DisplayName == "Makeblock")
                    {
                        MakeBlock = pairedDevices[i];
                    }
                }
                tbLogger.Text = tbLogger.Text + "'r'n" + "---------------------------";
                try
                {
                    StreamSocket socket = new StreamSocket();
                    IAsyncOperation<RfcommDeviceService> connectService;
                    connectService = RfcommDeviceService.FromIdAsync(MakeBlock.Id);
                    RfcommDeviceService rfcommService = await connectService;
                    await socket.ConnectAsync(rfcommService.ConnectionHostName, rfcommService.ConnectionServiceName,
                        SocketProtectionLevel.BluetoothEncryptionAllowNullAuthentication);
                    tbLogger.Text = tbLogger.Text + "'r'n" + "Connection to MakeBlock has been made...";
                }
                catch (Exception ex)
                {
                    tbLogger.Text = tbLogger.Text + "'r'n" + "Could not connect to " + MakeBlock.DisplayName;
                    tbLogger.Text = tbLogger.Text + "'r'n" + ex.Message;
                }
            }
            #endregion

代码失败是因为MakeBlock。Id = "

有什么建议吗?

            StreamSocket socket = new StreamSocket();
            await socket.ConnectAsync(MakeBlock.HostName, "{00001101-0000-1000-8000-00805F9B34FB}",
                SocketProtectionLevel.PlainSocket);
            tbLogger.Text = tbLogger.Text + "'r'n" + "Connection to MakeBlock has been made...";