Question

我有一个定制的蓝牙设备，我可以配对并连接到使用Windows 10，它会创建2个COM端口 - 一个列为传入，一个列在传出。

当我使用32Feet C＃蓝牙库连接时，我能够发现并配对设备并启用SPP配置文件，但是，唉，我只获得一个COM端口，它被列为＆＃34;传出＆＃34;

我需要使用其他人的代码与设备连接，并且需要提供一个com端口号。不幸的是，它想要连接到＆＃34;传入＆＃34;端口。

因此我的问题是创建这个传入的COM端口需要什么魔力？我查看了32位代码和BluetoothSetServiceState（...）的底层API调用，它似乎没有任何参数来控制端口的创建方式。是否有此功能的另一个配置文件??

Answer 1

您必须使用BluetoothAPIs.dll

中未记录的InstallIncomingComPort函数

Answer 2

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 3

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

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

WindowsBlurtoothDeviceInfo.cs中的

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);
}

蓝牙串行端口（SPP）传入端口创建

3 个答案: