How to read messages from an RS 232?

Sat, 05 Jul 2008 02:39:44 -0700

Hi,

I am writing a program that will connect to a modem via an RS232 port, and send commands, like for example to start a call.

Also I will need to read the feedback given from the modem, and by the code I have below, nothing is happening.

Can someone please help?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO.Ports;


namespace IREG_Tester_V2
{
    class Program
    {
        static SerialPort port1 = new SerialPort();
        static bool _continue = false; 

        static void Main(string[] args)
        {
            //Create Seriel Port Settings
                        
            port1.PortName = "COM3";
            port1.BaudRate = 9600;
            port1.Parity = Parity.None;
            port1.DataBits = 8;
            port1.StopBits = StopBits.One;



            // Open the port for communications 
            port1.Open();

            //Start Call
            Console.WriteLine("Enter Number to Dial and press Enter");
            string ip = Convert.ToString(Console.ReadLine());
            port1.WriteLine("ATD" + ip + ";");
            Console.WriteLine(DateTime.Now.ToLongTimeString())
;


            //Console.ReadLine();

            int pauseTime = 9000;
            System.Threading.Thread.Sleep(pauseTime);
            // During the 9 seconds pause, answer the call, and 
            // a messege OK should be received



            //Disconnect Call
            port1.WriteLine("ATH");
            Console.WriteLine(DateTime.Now.ToLongTimeString())
;
            Console.WriteLine("Call Disconnected!");

            
            Console.WriteLine("Press enter to Exit!");
            Console.ReadLine();

            // Close the port 
            port1.Close();
        }


             public void SerialPortProgram() 
             { 
                 Console.WriteLine("Incoming Data:"); 
                 
                 // Attach a method to be called when there is data waiting in the port's buffer 
                 port1.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived); 
             } 
        
            private void port_DataReceived(object sender,SerialDataReceivedEventArgs e) 
            { 
            // Show all the incoming data in the port's buffer 
                Console.WriteLine(port1.ReadExisting()); 
            }

    }
}

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