El siguiente código fuente muestro como conectarnos a un puerto serial "COM1" y leer datos escritos en el por medio del evento DataReceived.
private
System.IO.Ports.SerialPort RS232 = new System.IO.Ports.SerialPort();// Recibir tramas por el puerto serial
void RS232_DataReceived(object sender, SerialDataReceivedEventArgs e) {
System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
try
{
this.Invoke(new EventHandler(RS232_READ));
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
// Invocamos este metodo para leer la ultima trama recibida en el puerto
void RS232_READ(object s, EventArgs e) {
try
{
System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
string strUltimaTrama = "";
char[] splitter = { ” };
strTramaDevuelta = strTramaDevuelta + RS232.ReadExisting();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
// Abrir puerto Serial
private bool AbrirPuertoSerial()
{
if (RS232.IsOpen)
RS232.Close();
//deshabilitar controles
tsbtnOpen.Enabled = true;
string SelectedPort = "Com1";
try
{
string BaudRate = System.Configuration.ConfigurationManager.AppSettings["BautRate"].ToString();
RS232 = new SerialPort(SelectedPort, Convert.ToInt16(BaudRate), Parity.None, 8, StopBits.One);
RS232.DataReceived += new SerialDataReceivedEventHandler(RS232_DataReceived);
RS232.DtrEnable = true;
RS232.RtsEnable = true; // RTS request to sent
RS232.Encoding = Encoding.ASCII; //System.Text.Encoding.GetEncoding(28591);
RS232.ReadTimeout = Convert.ToInt32(System.Configuration.ConfigurationManager.AppSettings["TimeOut"].ToString());
RS232.StopBits = StopBits.One; // bits de parada
RS232.DataBits = 8; // longitud de data bits
RS232.Parity = Parity.None; // parity checking protocol
RS232.Handshake = Handshake.None;
RS232.BaudRate = Convert.ToInt32(BaudRate);
RS232.DiscardNull = false;
RS232.NewLine = "";
//RS232.ReadBufferSize = 4098;
RS232.Open();
return true;
}
catch (IOException)
{
return false;
}
catch (UnauthorizedAccessException)
{
return false;
}
catch (Exception)
{
return false;
}
}
omaracostacasas 