/// <summary>
/// Connect to the EV3 brick.
/// </summary>
public async Task ConnectAsync()
{
BluetoothAdapter adapter = BluetoothAdapter.DefaultAdapter;
if(adapter == null)
throw new Exception("No Bluetooth adapter found");
if(!adapter.IsEnabled)
throw new Exception("Bluetooth adapter is not enabled");
BluetoothDevice device = (from bd in adapter.BondedDevices where bd.Name == _deviceName select bd).FirstOrDefault();
if(device == null)
throw new Exception("LEGO EV3 brick named '" + _deviceName + "' not found.");
_socket = device.CreateRfcommSocketToServiceRecord(UUID.FromString("00001101-0000-1000-8000-00805f9b34fb"));
await _socket.ConnectAsync();
_tokenSource = new CancellationTokenSource();
Task t = Task.Factory.StartNew(async () =>
{
while(!_tokenSource.IsCancellationRequested)
{
Stream stream = _socket.InputStream;
// if the stream is valid and ready
if(stream != null && stream.CanRead)
{
await stream.ReadAsync(_sizeBuffer, 0, _sizeBuffer.Length);
short size = (short)(_sizeBuffer[0] | _sizeBuffer[1] << 8);
if(size == 0)
return;
byte[] report = new byte[size];
await stream.ReadAsync(report, 0, report.Length);
if (ReportReceived != null)
ReportReceived(this, new ReportReceivedEventArgs { Report = report });
}
}
}, _tokenSource.Token, TaskCreationOptions.LongRunning, TaskScheduler.Current);
}
public async Task<bool> Init(bool simulatormode = false)
{
running = true;
//initialize _data
data = new Dictionary<string, string> {{"vin", DefValue}};
//VIN
piDs = ObdShare.ObdUtil.GetPIDs();
foreach (var v in piDs.Values)
{
data.Add(v, DefValue);
}
this.simulatormode = simulatormode;
if (simulatormode)
{
return true;
}
bluetoothAdapter = BluetoothAdapter.DefaultAdapter;
if (bluetoothAdapter == null)
{
System.Diagnostics.Debug.WriteLine("Bluetooth is not available");
return false;
}
try
{
var ba = bluetoothAdapter.BondedDevices;
foreach (var bd in ba)
{
if (bd.Name.ToLower().Contains("obd"))
bluetoothDevice = bd;
}
if (bluetoothDevice == null)
{
return false;
}
bluetoothSocket = bluetoothDevice.CreateRfcommSocketToServiceRecord(SppUuid);
await bluetoothSocket.ConnectAsync();
connected = true;
}
catch (Java.IO.IOException)
{
// Close the socket
try
{
connected = false;
bluetoothSocket.Close();
}
catch (Java.IO.IOException)
{
}
catch (Exception)
{
}
return false;
}
catch (Exception)
{
}
if (connected)
{
reader = bluetoothSocket.InputStream;
writer = bluetoothSocket.OutputStream;
string s;
s = await SendAndReceive("ATZ\r");
s = await SendAndReceive("ATE0\r");
s = await SendAndReceive("ATL1\r");
s = await SendAndReceive("ATSP00\r");
PollObd();
return true;
}
else
return false;
}
