public async Task <byte> ATTClientReadByGroupTypeAsync(byte connectionHandle, ushort handleRangeStart, ushort handleRangeEnd, byte[] primaryUUIDBytes)
{
const int TIMEOUT_MS = 6000;
var cmd = _bglib.BLECommandATTClientReadByGroupType(connectionHandle, handleRangeStart, handleRangeEnd, primaryUUIDBytes);
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 = $"ATTClientReadByGroupType returned: error={error} code={_lastResult:X4}";
throw new Exception(errMsg);
}
byte conHandle = ((ReadByGroupTypeEventArgs)_lastResponseArgs).connection;
return(conHandle);
}
private void OnDeviceConnected(object sender, StatusEventArgs e)
{
var deviceStatus = BleMappings.MapBleDeviceStatus(e);
if (_device == null || deviceStatus == null || _device.Address != deviceStatus.Address)
{
return;
}
if (deviceStatus.IsConnected) // Connected
{
// Service Discovery
_bglib.SendCommand(_serialPort,
_bglib.BLECommandATTClientReadByGroupType(e.connection, 0x0001, 0xFFFF,
new byte[] { 0x00, 0x28 })); // "service" UUID is 0x2800 (little-endian for UUID uint8array)
}
else
{
_logger.LogInformation(
$"ControlPlus Repository: Connection changed: {deviceStatus.Address} {deviceStatus.Flags}");
}
}
