[英]c# Bluetooth LE - write configuration error - ValueChanged never called
因此,我嘗試將c#WPF程序連接到BLE設備,這是連接到該設備的代碼:
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.
}
}
線
Debug.WriteLine($"Characteristics write result: status={result.Status}, protocolError={result.ProtocolError}"
創建輸出特征寫入結果:status = protocolError,protocolError = 3我在任何地方都找不到這意味着什么。 結果就是方法特性 .ValueChanged永遠不會被調用。
我需要做更多的事情來配置特性嗎? 有人知道為什么不調用該方法或該錯誤消息表示什么嗎?
謝謝你
顯然,某些Windows 10版本具有COM安全漏洞。 解決的辦法是注冊Windows-Insider-Program並更新Windows。
更新:對此還有兩種解決方案:1)從您的C#代碼外部調用CoInitializeSecurity(沒有使其工作)-或2)將兩個新密鑰寫入Windows注冊表。 您無法創建文件“ Bluetooth.reg”,該文件將在doubleklick上添加這兩個鍵。 來自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,我遇到了完全一樣的問題。 您可以快速嘗試以下方法:
Windows注冊表編輯器版本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}”
將以上內容復制到文本文件。
將“ YOURAPP.EXE”替換為您的可執行文件名稱
(可選)替換GUID(我為您創建了一個新的GUID)
將帶有擴展名的文本文件另存為.reg
雙擊文件。
您會看到一條消息“ ..... reg中包含的鍵和值已成功添加到注冊表中。”
有了這個,我不需要從我的應用程序調用CoInitializeSecurity。
您需要先致電CoInitializeSecurity
更多信息在這里。 我花了兩個星期尋找解決方案:)
https://social.msdn.microsoft.com/Forums/zh-CN/58da3fdb-a0e1-4161-8af3-778b6839f4e1/
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