/// <summary>
/// Resets the device, and sets all attributes to unconnected states.
/// </summary>
public void Close()
{
lock (_syncLock)
{
Status = OBDStatus.NotConnected;
Protocol = null;
if (_serialPort != null)
{
Write("ATZ");
_serialPort.Close();
_serialPort = null;
}
}
}
private bool ConnectToSerialPort(string portname, int baudrate)
{
lock (_syncLock)
{
_serialPort = new SerialPort(portname, baudrate);
var timeout = Convert.ToInt32(Config.Timeout.TotalMilliseconds);
// ------------- open port -------------
try
{
_logger.Debug($"Opening serial port '{Config.Portname}'");
_serialPort = new SerialPort(Config.Portname, Config.Baudrate, Parity.None)
{
StopBits = StopBits.One,
ReadTimeout = timeout,
WriteTimeout = timeout
};
_serialPort.Open();
_logger.Debug($"Serial port successfully opened on {Config.Portname}");
}
catch (Exception e)
{
Error(e.Message);
return(false);
}
// ---------------------------- ATZ (reset) ----------------------------
try
{
Send("ATZ", TimeSpan.FromSeconds(1)); // wait 1 second for ELM to initialize
}
catch (Exception e)
{
Error(e.Message);
return(false);
}
// -------------------------- ATE0 (echo OFF) --------------------------
var r = Send("ATE0");
if (!IsOk(r, true))
{
Error("ATE0 did not return 'OK'");
return(false);
}
// ------------------------- ATH1 (headers ON) -------------------------
r = Send("ATH1");
if (!IsOk(r))
{
Error("ATH1 did not return 'OK', or echoing is still ON");
return(false);
}
// ------------------------ ATL0 (linefeeds OFF) -----------------------
r = Send("ATL0");
if (!IsOk(r))
{
Error("ATL0 did not return 'OK'");
return(false);
}
// by now, we've successfuly communicated with the ELM, but not the car
Status = OBDStatus.ElmConnected;
// try to communicate with the car, and load the correct protocol parser
if (CheckProtocol())
{
Status = OBDStatus.CarConnected;
_logger.Info("Connection successful");
return(true);
}
_logger.Info("Connected to the adapter, but failed to connect to the vehicle");
return(false);
}
}
