windows 低功耗蓝牙扫描代码

以下是 Windows 上使用 C# 实现的低功耗蓝牙（BLE）扫描代码示例：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Windows.Devices.Bluetooth;
using Windows.Devices.Bluetooth.Advertisement;

namespace BLEScanner
{
    class Program
    {
        static void Main(string[] args)
        {
            // 创建 Bluetooth LE 监听器
            BluetoothLEAdvertisementWatcher watcher = new BluetoothLEAdvertisementWatcher();
            watcher.ScanningMode = BluetoothLEScanningMode.Active;

            // 订阅扫描结果事件
            watcher.Received += (watcher, eventArgs) =>
            {
                Console.WriteLine("Device name: " + eventArgs.Advertisement.LocalName);
                Console.WriteLine("Device address: " + eventArgs.BluetoothAddress);
                Console.WriteLine("RSSI: " + eventArgs.RawSignalStrengthInDBm);
                Console.WriteLine();
            };

            // 启动扫描
            watcher.Start();

            // 等待扫描完成
            Console.WriteLine("Scanning for BLE devices...");
            Console.ReadLine();

            // 停止扫描
            watcher.Stop();
        }
    }
}

该示例使用了 Windows.Devices.Bluetooth.Advertisement 命名空间中的 BluetoothLEAdvertisementWatcher 类，可以扫描周围的 BLE 设备，并输出设备名称、地址和信号强度等信息。需要注意的是，该程序需要在 Windows 10 或更高版本的操作系统上运行，并且需要在应用程序的清单文件中声明"bluetooth"设备权限。