c# - UWP BLE Advertising 读取数据

Question

我用 iPhone 在 BLE Advertising 中发送数据(短字符串)，我想从 Windows 设备读取这个字符串。

所以我正在尝试示例项目“BluetoothAdvertisement”，来自:https://github.com/Microsoft/Windows-universal-samples/tree/master/Samples/BluetoothAdvertisement

我看到我收到包裹，我可以在回调中读取本地名称等...:

 private async void OnAdvertisementReceived(BluetoothLEAdvertisementWatcher watcher, BluetoothLEAdvertisementReceivedEventArgs eventArgs)
    { }

但是我怎样才能读取字符串呢？

Answer 1

如果您使用的是公司特定的广告，我不知道您使用哪些方式向广告添加数据。我认为您可以从 BluetoothLEAdvertisementReceivedEventArgs 获取自定义数据部分，然后查询 eventArgs.Advertisement.ManufacturerData 以获取 BluetoothLEManufacturerData。

private async void OnAdvertisementReceived(BluetoothLEAdvertisementWatcher watcher, BluetoothLEAdvertisementReceivedEventArgs eventArgs)
{
    var DataList = eventArgs.Advertisement.ManufacturerData;
    foreach (var temp in DataList)
    {
        var data = new byte[temp.Data.Length];
        using (var reader = DataReader.FromBuffer(temp.Data))
        {
            reader.ReadBytes(data);
        }
        var str = Encoding.ASCII.GetString(data);
    }
}