public async Task <byte> ATTClientFindInformationAsync(byte connectionHandle, UInt16 handleRangeStart, UInt16 handleRangeEnd)
{
const int TIMEOUT_MS = 6000;
var cmd = _bglib.BLECommandATTClientFindInformation(connectionHandle, handleRangeStart, handleRangeEnd);
await _bglib.SendCommandAsync(cmd).ConfigureAwait(false);
using (var cts = new CancellationTokenSource(TIMEOUT_MS)) {
bool didTimeout = false;
try { await _cmdRespWaitHandle.WaitAsync(cts.Token).ConfigureAwait(false); }
catch (OperationCanceledException) { didTimeout = true; }
if (didTimeout)
{
throw new TimeoutException();
}
}
if (_lastResult != 0)
{
var error = Enum.ToObject(typeof(BGErrorCode), _lastResult);
string errMsg = $"ATTClientFindInformation returned: error={error} code={_lastResult:X4}";
throw new Exception(errMsg);
}
byte conHandle = ((FindInformationEventArgs)_lastResponseArgs).connection;
return(conHandle);
}
public void FetchCharacteristics(CancellationToken appToken, int connectTimeoutInMilliseconds,
BgBleDeviceService deviceService)
{
deviceService.Characteristics.Clear();
try
{
var lockTaken = false;
Monitor.TryEnter(ThreadLock, 150, ref lockTaken);
if (lockTaken)
{
if (_busy)
{
return;
}
_busy = true;
Monitor.Exit(ThreadLock);
}
_deviceService = deviceService;
_currentAction = new CancellationTokenSource();
var populateClientInformationTokenSource =
CancellationTokenSource.CreateLinkedTokenSource(appToken,
_currentAction.Token);
_bglib.SendCommand(_serialPort,
_bglib.BLECommandATTClientFindInformation(deviceService.ConnectionHandle, deviceService.Start,
deviceService.End));
WaitHandle.WaitAny(new[] { populateClientInformationTokenSource.Token.WaitHandle },
connectTimeoutInMilliseconds);
}
catch (Exception exception)
{
_logger.LogWarning(exception,
$"ControlPlus Repository: Unable to populate Client Information {deviceService.ServiceId}");
}
_lastCharacteristic = null;
_deviceService = null;
_device = null;
_busy = false;
}
