Home > Article > Backend Development > Detailed explanation of the code for reading COM PORT in C#
C# Read COM PORT
Refer to the MSDN example:
https://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx
Still doesn’t work, you need to add this line of code:
mySerialPort.DtrEnable = true;
DtrEnable attribute description:
Gets or sets a value that enables the Data Terminal Ready (DTR) signal during serial communication.
demo code:
public class COMPortListener { private static ILog logger = LogManager.GetLogger(typeof (COMPortListener)); #region single instance private COMPortListener() { } static COMPortListener() { } private static COMPortListener _instance = new COMPortListener(); public static COMPortListener Instance { get { return _instance; } } #endregion public Action98c455a79ddfebb79781bff588e7b37e OnDataReceived; public void SerialPortListenAsync() { if (OnDataReceived == null) { throw new InvalidOperationException("must set callback [OnDataReceived] first."); } Task.Run(() => { var mySerialPort = new SerialPort(ConfigurationManager.AppSettings["COM_PORT"]); mySerialPort.BaudRate = 9600; mySerialPort.Parity = Parity.None; mySerialPort.StopBits = StopBits.One; mySerialPort.DataBits = 8; mySerialPort.Handshake = Handshake.None; mySerialPort.RtsEnable = true; mySerialPort.DtrEnable = true; mySerialPort.ReadTimeout = 500; mySerialPort.ErrorReceived += (sender, args) => { Console.WriteLine("######error"); Console.WriteLine(args.EventType); }; mySerialPort.Open(); logger.Info("####COM PORT opened..."); while (true) { try { string message = mySerialPort.ReadLine(); OnDataReceived(message); Task.Delay(500); } catch (TimeoutException ex) { //do nothing } } }); } }
That’s it C# Read the detailed explanation of the COM PORT code. For more related content, please pay attention to the PHP Chinese website (www.php.cn)!