[英]c# Bluetooth LE - write configuration error - ValueChanged never called
因此,我尝试将c#WPF程序连接到BLE设备,这是连接到该设备的代码:
private async Task ConnectToWatcher(DeviceInformation deviceInfo) {
try {
// get the device
BluetoothLEDevice device = await BluetoothLEDevice.FromIdAsync(deviceInfo.Id);
// get the GATT service
Thread.Sleep(150);
var gattServicesResult = await device.GetGattServicesForUuidAsync(new Guid(RX_SERVICE_UUID));
service = gattServicesResult.Services[0];
// get the GATT characteristic
Thread.Sleep(150);
var gattCharacteristicsResult = await service.GetCharacteristicsForUuidAsync(new Guid(RX_CHAR_UUID));
characteristic = gattCharacteristicsResult.Characteristics[0];
// register for notifications
Thread.Sleep(150);
characteristic.ValueChanged += (sender, args) => {
Debug.WriteLine($"[{device.Name}] Received notification containing {args.CharacteristicValue.Length} bytes");
};
GattWriteResult result =
await characteristic.WriteClientCharacteristicConfigurationDescriptorWithResultAsync(GattClientCharacteristicConfigurationDescriptorValue.Notify);
Debug.WriteLine($"Characteristics write result: status={result.Status}, protocolError={result.ProtocolError}");
} catch (Exception ex) when ((uint)ex.HResult == 0x800710df) {
Debug.WriteLine("bluetooth error 1");
// ERROR_DEVICE_NOT_AVAILABLE because the Bluetooth radio is not on.
}
}
线
Debug.WriteLine($"Characteristics write result: status={result.Status}, protocolError={result.ProtocolError}"
创建输出特征写入结果:status = protocolError,protocolError = 3我在任何地方都找不到这意味着什么。 结果就是方法特性 .ValueChanged永远不会被调用。
我需要做更多的事情来配置特性吗? 有人知道为什么不调用该方法或该错误消息表示什么吗?
谢谢你
显然,某些Windows 10版本具有COM安全漏洞。 解决的办法是注册Windows-Insider-Program并更新Windows。
更新:对此还有两种解决方案:1)从您的C#代码外部调用CoInitializeSecurity(没有使其工作)-或2)将两个新密钥写入Windows注册表。 您无法创建文件“ Bluetooth.reg”,该文件将在doubleklick上添加这两个键。 来自https://social.msdn.microsoft.com/Forums/en-US/58da3fdb-a0e1-4161-8af3-778b6839f4e1/bluetooth-bluetoothledevicefromidasync-does-not-complete-on-10015063?forum=wdk的答案是我的解:
嗨,假面,我遇到了完全一样的问题。 您可以快速尝试以下方法:
Windows注册表编辑器版本5.00
[HKEY_LOCAL_MACHINE \\ SOFTWARE \\ Classes \\ AppID {C6BFD646-3DF0-4DE5-B7AF-5FFFACB844A5}]“ AccessPermission” = hex:01,00,04,80,9c,00,00,00,ac,00,00,00, 00,00,00,00,14,00,\\ 00,00,02,00,88,00,06,00,00,00,00,00,00,14,00,07,00,00,00,01 ,01,00,00,00,00,00,\\ 05,0a,00,00,00,00,00,14,00,03,00,00,00,01,01,00,00,00, 00,00,05,12,00,00,00,\\ 00,00,18,00,07,00,00,00,01,02,00,00,00,00,00,05,20,00 ,00,00,20,02,00,00,00,\\ 00,18,00,03,00,00,00,01,02,00,00,00,00,00,0f,02,00, 00,00,01,00,00,00,00,00,\\,14,00,03,00,00,00,01,01,00,00,00,00,00,05,13,00,00 ,00,00,00,14,00,03,00,00,\\ 00,01,01,00,00,00,00,00,05,14,00,00,00,01,02,00, 00,00,00,00,05,20,00,00,00,\\ 20,02,00,00,01,02,00,00,00,00,00,05,20,00,00,00,00 ,20,02,00,00
[HKEY_LOCAL_MACHINE \\ SOFTWARE \\ Classes \\ AppID \\ YOURAPP.exe]“ AppID” =“ {C6BFD646-3DF0-4DE5-B7AF-5FFFACB844A5}”
将以上内容复制到文本文件。
将“ YOURAPP.EXE”替换为您的可执行文件名称
(可选)替换GUID(我为您创建了一个新的GUID)
将带有扩展名的文本文件另存为.reg
双击文件。
您会看到一条消息“ ..... reg中包含的键和值已成功添加到注册表中。”
有了这个,我不需要从我的应用程序调用CoInitializeSecurity。
您需要先致电CoInitializeSecurity
更多信息在这里。 我花了两个星期寻找解决方案:)
https://social.msdn.microsoft.com/Forums/zh-CN/58da3fdb-a0e1-4161-8af3-778b6839f4e1/
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