I am trying to create a communication between an Arduino Leonardo and C#.
Just now, the Arduino's software sends a simple message (in loop) on the serial port:
void setup() {
Serial.begin(9600);
analogReference(INTERNAL);
}
void loop() {
Serial.println("test");
delay(500);
}
C# try only to read these messages and print them on the shell:
public class Program
{
private SerialPort mySerialPort;
static void Main(string[] args)
{
Program p = new Program();
Console.WriteLine("PORTS: " + String.Join(" ", p.getSerialPortsList())+ ", enter to start.");
Console.Read();
p.SerialRead("COM6");
}
public String[] getSerialPortsList()
{
string[] ports = SerialPort.GetPortNames();
return ports;
}
public void SerialRead(String com)
{
mySerialPort = new SerialPort(com, 9600, Parity.None, 8, StopBits.One);
Console.Read();
Console.WriteLine("Incoming Data:");
SerialRead sr = new SerialRead();
Thread rs = new Thread(sr.StartRead);
sr.SetMySerialPort(mySerialPort);
rs.Start();
while (!rs.IsAlive);
Console.Read();
sr.SetSuspendThread(true);
rs.Join();
}
}
public class SerialRead
{
private Boolean suspendThread = false;
SerialPort mySerialPort;
public void StartRead()
{
mySerialPort.Open();
Thread.Sleep(500);
int i = 0;
while (!suspendThread)
{
i++;
Console.WriteLine(i + ": " + mySerialPort.ReadLine());
Thread.Sleep(500);
}
}
public void SetMySerialPort(SerialPort mysp){ mySerialPort = mysp; }
public void SetSuspendThread(Boolean a){ suspendThread = a; }
}
The output of this C# software depends. If I use the serial monitor on the Arduino IDE, then I receive the string's stream correctly (one each 500ms). Otherwise, the C# software freezes. Sometimes, I receive a couple of strings as we can see this figure ; but almost all time, the software does not give any string, as we can see here . After that the software freezes (thus, if I press enter the shell does not response).
Can you suggest a solution in order to get a fluent flow of string, and -as a consequence- read each message sent by Arduino on the serial port?
I am using Window 10 x64 as OS and the COM6 (it is an USB 2.0).
I found the solution and I share it in order to help people with the same problem. C# does not activate as default the RTS and the DTR serial port . Thus, adding
mySerialPort.DtrEnable = true;
mySerialPort.RtsEnable = true;
after the serial port declaration, everything works fine.
This is a really good example: Serial Port Polling and Data handling
The Serial Port got an event called DataRecived , so you dont have to sleep your thread.
Something like this:
serialPort.DataReceived +=SerialPortDataReceived;
private void SerialPortDataReceived(object sender, SerialDataReceivedEventArgs e)
{
Console.WriteLine(serialPort.ReadLine());
}
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