Hi
im tring to send AT command to my gsm modem using serialport. but its not working properly. Reading event not working!. please help me to doing this.
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#region Namespace Inclusions

using System;

using System.IO.Ports;

using System.Windows.Forms;

#endregion

namespace SerialPortExample

{

classSerialPortProgram

{

// Create the serial port with basic settings

privateSerialPort port =newSerialPort("COM1", 9600,Parity.None, 8,StopBits.One);

[STAThread]

staticvoid Main(string[] args)

{

SerialPortProgram sp =newSerialPortProgram();

sp.SendSampleData();

Application.Run();

}

privatevoid SendSampleData()

{

Console.WriteLine("Sending Data:" +port.IsOpen);

port.WriteLine("AT");

}

private SerialPortProgram()

{

Console.WriteLine("Incoming Data:");

// Attach a method to be called when there is data waiting in the port's buffer

port.DataReceived +=newSerialDataReceivedEventHandler(port_DataReceived);

port.ErrorReceived +=newSerialErrorReceivedEventHandler(sp_ErrorEvent);

//port.ReceivedBytesThreshold = 1;

Console.WriteLine("ReadBufferSize:" + port.ReadBufferSize);

//port.ReadBufferSize = 2047;

port.ReceivedBytesThreshold = 100;

port.ReadTimeout = 3000;// 3 second timeout

port.NewLine ="\r";

// Begin communications

port.Open();

//port.DtrEnable = true;

}

privatevoid sp_ErrorEvent(object sender,SerialErrorReceivedEventArgs e)

{

Console.WriteLine(">>e");

}

privatevoid port_DataReceived(object sender,SerialDataReceivedEventArgs e)

{

Console.WriteLine(">>");

// Show all the incoming data in the port's buffer

//Console.WriteLine(port.ReadExisting());

int c;

while (port.BytesToRead > 0)

{

c = port.ReadByte();

Console.WriteLine(">"+c);

}

}

}

}
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console output :
Incoming Data:
ReadBufferSize:4096
Sending Data:True
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Thanks