unity 写一个在有蓝牙模块的windows设备上运行的可以搜索蓝牙的代码

以下是一个简单的Unity蓝牙搜索代码示例：

using UnityEngine;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Threading.Tasks;

public class BluetoothScanner : MonoBehaviour
{
    private List<string> _devices = new List<string>();

    [DllImport("BluetoothAPI")]
    private static extern bool BluetoothFindFirstDevice(out System.IntPtr handle, ref BLUETOOTH_DEVICE_SEARCH_PARAMS searchParams, ref BLUETOOTH_DEVICE_INFO deviceInfo);

    [DllImport("BluetoothAPI")]
    private static extern bool BluetoothFindNextDevice(System.IntPtr hFind, ref BLUETOOTH_DEVICE_INFO deviceInfo);

    [DllImport("BluetoothAPI")]
    private static extern bool BluetoothFindDeviceClose(System.IntPtr hFind);

    [StructLayout(LayoutKind.Sequential)]
    private struct BLUETOOTH_DEVICE_SEARCH_PARAMS
    {
        public int dwSize;
        public bool fReturnAuthenticated;
        public bool fReturnRemembered;
        public bool fReturnUnknown;
        public bool fReturnConnected;
        public bool fIssueInquiry;
        public byte cTimeoutMultiplier;
        public System.IntPtr hRadio;
    }

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    private struct BLUETOOTH_DEVICE_INFO
    {
        public int dwSize;
        public long Address;
        public uint ulClassofDevice;
        [MarshalAs(UnmanagedType.Bool)]
        public bool fConnected;
        [MarshalAs(UnmanagedType.Bool)]
        public bool fRemembered;
        [MarshalAs(UnmanagedType.Bool)]
        public bool fAuthenticated;
        public SYSTEMTIME stLastSeen;
        public SYSTEMTIME stLastUsed;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 248)]
        public string szName;
    }

    [StructLayout(LayoutKind.Sequential)]
    private struct SYSTEMTIME
    {
        public ushort wYear;
        public ushort wMonth;
        public ushort wDayOfWeek;
        public ushort wDay;
        public ushort wHour;
        public ushort wMinute;
        public ushort wSecond;
        public ushort wMilliseconds;
    }

    private async void Start()
    {
        await Task.Delay(1000); // 等待一秒钟，让蓝牙模块初始化

        BLUETOOTH_DEVICE_SEARCH_PARAMS searchParams = new BLUETOOTH_DEVICE_SEARCH_PARAMS();
        searchParams.dwSize = Marshal.SizeOf(typeof(BLUETOOTH_DEVICE_SEARCH_PARAMS));
        searchParams.fReturnAuthenticated = true;
        searchParams.fReturnRemembered = true;
        searchParams.fReturnUnknown = true;
        searchParams.fReturnConnected = true;
        searchParams.cTimeoutMultiplier = 10;

        System.IntPtr searchHandle;
        BLUETOOTH_DEVICE_INFO deviceInfo = new BLUETOOTH_DEVICE_INFO();
        deviceInfo.dwSize = Marshal.SizeOf(typeof(BLUETOOTH_DEVICE_INFO));

        if (BluetoothFindFirstDevice(out searchHandle, ref searchParams, ref deviceInfo))
        {
            do
            {
                _devices.Add(deviceInfo.szName);
            }
            while (BluetoothFindNextDevice(searchHandle, ref deviceInfo));
        }

        BluetoothFindDeviceClose(searchHandle);

        Debug.Log("Found " + _devices.Count + " Bluetooth devices:");
        foreach (string device in _devices)
        {
            Debug.Log(device);
        }
    }
}

上述代码使用了Windows API函数来搜索Bluetooth设备。它可以在Unity中使用，但是需要编译为Windows应用程序才能运行，因为它使用Windows API函数来访问蓝牙硬件。