蓝牙串口(SPP)传入端口的创建

Question

我有一个定制的蓝牙设备，我可以与之配对，并连接到使用windows 10，它创建了2个com端口-一个被列为传入，一个列在出站。

当我使用32 32Feet C#蓝牙库连接时，我能够发现并对设备和启用SPP配置文件进行配对，但是，唉，我只得到一个COM端口，它被列为“传出”。

我需要使用其他人的代码与设备接口，并且需要提供一个com端口号。不幸的是，它希望连接到“传入”端口。

因此，我的问题是，我需要什么魔法来创建这个传入的com端口？我看过32 32Feet代码和BluetoothSetServiceState的底层API调用(.)而且它似乎没有任何参数来控制如何创建端口。这个功能还有其他的配置文件吗？？

Answer 1

private const UInt16 BLUETOOTH_MAX_SERVICE_NAME_SIZE = 256;
private const UInt16 BLUETOOTH_DEVICE_NAME_SIZE  = 256;

private static Guid SerialPortServiceClass_UUID = new Guid("{00001101-0000-1000-8000-00805F9B34FB}");

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
private struct BLUETOOTH_LOCAL_SERVICE_INFO
{
            public Boolean Enabled;
            public Int64 btAddr;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = BLUETOOTH_MAX_SERVICE_NAME_SIZE)]
            public String szName;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = BLUETOOTH_DEVICE_NAME_SIZE)]
            public String szDeviceString;
};

[DllImport("BluetoothAPIs.dll", CallingConvention = CallingConvention.StdCall, SetLastError = true)]
private static extern UInt32 BluetoothSetLocalServiceInfo(IntPtr hRadioIn, ref Guid pClassGuid, UInt32 ulInstance, ref BLUETOOTH_LOCAL_SERVICE_INFO pServiceInfoIn);

private void CreateComPort(Boolean Create)
{
            BLUETOOTH_LOCAL_SERVICE_INFO s = new BLUETOOTH_LOCAL_SERVICE_INFO();
            s.btAddr = 0;
            s.Enabled = Create;
            s.szName = "MyComPort";
            s.szDeviceString = "COM10";

            UInt32 Res = BluetoothSetLocalServiceInfo(IntPtr.Zero,
                ref SerialPortServiceClass_UUID, 1, ref s);
            MessageBox.Show(Res.ToString());
}

Answer 2

您必须使用来自BluetoothAPIs.dll的无文档化的BluetoothAPIs.dll函数。

Answer 3

如果您希望使用InTheHand BT库并获得传入的com端口，则可以将以下代码添加到函数的底部

public void SetServiceState(Guid service, bool state, bool throwOnError)

在WindowsBlurtoothDeviceInfo.cs中

if (service == BluetoothService.SerialPort)
{
    NativeMethods.BLUETOOTH_LOCAL_SERVICE_INFO s = new NativeMethods.BLUETOOTH_LOCAL_SERVICE_INFO();
    s.btAddr = deviceInfo.Address;
    s.Enabled = state;
    s.szName = "RemScan";
    s.szDeviceString = "COM10";
    UInt32 Res = NativeMethods.BluetoothSetLocalServiceInfo(IntPtr.Zero, ref NativeMethods.SerialPortServiceClass_UUID, 1, ref s);
}