我正在Xamarin Forms中实现BLE。我能够执行所有BLE操作,包括读取、写入和通知。但有时设备在连接后会断开连接。这是我收到的异常信息:
我从Xamarin方面没有得到任何解决方案。有什么建议吗?
以下是我的连接代码:Plugin.BLE.Abstractions.Exceptions.DeviceConnectionException: 'GattCallback error: 133'
private async Task ScanForDevices(ScanData scanData)
{
_adapter = CrossBluetoothLE.Current.Adapter;
_adapter.ScanMode = ScanMode.LowLatency;
Device.BeginInvokeOnMainThread(async () =>
{
_adapter.DeviceDiscovered += async (s, a) =>
{
NativeDeviceAdd = DependencyService.Get<INativeDevice>().ConvertToNative(a.Device);
PropertyInfo propInfo = NativeDeviceAdd.GetType().GetProperty("Name");
BleDeviceName = (string)propInfo.GetValue(NativeDeviceAdd, null);
string substr = scanData.blename;
if (BleDeviceName == substr)
{
_device = a.Device;
await _adapter.StopScanningForDevicesAsync();
await ConnectForDevice(_characteristicsBLE);
}
};
});
await _adapter.StartScanningForDevicesAsync();
}
private async Task ConnectForDevice(ICharacteristic characteristics)
{
await _adapter.ConnectToDeviceAsync(_device);
}
这些是日志。
01-08 17:31:50.435 D/BluetoothManager(26670): getConnectionState()
01-08 17:31:50.435 D/BluetoothManager(26670): getConnectedDevices
01-08 17:31:50.439 D/BluetoothGatt(26670): connect() - device: 34:C9:F0:8D:F4:57, auto: false
01-08 17:31:50.439 D/BluetoothGatt(26670): registerApp()
01-08 17:31:50.439 D/BluetoothGatt(26670): registerApp() - UUID=84c84faa-46ff-4e02-9f9a-f8d14fed8ed0
01-08 17:31:50.441 D/BluetoothGatt(26670): onClientRegistered() - status=0 clientIf=13
01-08 17:31:51.587 D/BluetoothGatt(26670): onClientConnectionState() - status=133 clientIf=13 device=34:C9:F0:8D:F4:57
01-08 17:31:51.594 D/BluetoothGatt(26670): onClientConnectionState() - status=133 clientIf=12 device=34:C9:F0:8D:F4:57
Thread started: #10
Thread started: #11
01-08 17:31:51.680 D/BluetoothGatt(26670): close()
01-08 17:31:51.680 D/BluetoothGatt(26670): close()
01-08 17:31:51.680 D/BluetoothGatt(26670): unregisterApp() - mClientIf=12
01-08 17:31:51.680 D/BluetoothGatt(26670): unregisterApp() - mClientIf=13
**Plugin.BLE.Abstractions.Exceptions.DeviceConnectionException:** 'GattCallback error: 133'
我从Xamarin方面没有得到任何解决方案。有什么建议吗?