Sorry for waiting for my reply, been busy lately. In short this is my code for getting message from GSM USB dongle. I hope that it will be useful to someone...
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO.Ports;
namespace SMSget
{
public partial class SMSLogPanel : UserControl
{
SerialPort sp;
int datab = 0;
bool dtr = false;
bool encod;
Handshake h;
Parity p;
int wtimeout = 0;
StopBits s;
#region default constructor
public SMSLogPanel()
{
InitializeComponent();
this.sp = serialPort1 = new SerialPort();
this.datab = serialPort1.DataBits = 8;
this.dtr = serialPort1.DtrEnable = true;
this.encod = serialPort1.Encoding.Equals("iso-8859-1");
this.h = serialPort1.Handshake = Handshake.RequestToSend;
this.p = serialPort1.Parity = Parity.None;
this.wtimeout = serialPort1.WriteTimeout = 300;
this.s = serialPort1.StopBits = StopBits.One;
checkLink();
}
#endregion
#region checking communication and setting user controls...
private void checkLink()
{
GetValues value = new GetValues();
string com = value.getPort();
int baud = value.getBaud();
int timeot = value.getTimeout();
serialPort1.PortName = com;
serialPort1.BaudRate = baud;
serialPort1.ReadTimeout = timeot;
serialPort1.Open();
if (serialPort1.IsOpen)
{
label1.Visible = true;
}
else
{
MessageBox.Show("Komunikacija sa modemom se ne može uspostaviti, molimo postavite novu konfiguraciju...!");
this.Controls.Clear();
SMSConfigPanel cfg = new SMSConfigPanel();
cfg.Show();
this.Controls.Add(cfg);
}
serialPort1.Close();
}
#endregion
#region panel load method
private void SMSLogPanel_Load(object sender, EventArgs e)
{
setGSM();
}
#endregion
#region execute serialport handler
public void getMessage()
{
if (serialPort1.IsOpen)
{
serialPort1.DataReceived += new SerialDataReceivedEventHandler(getResponse);
}
else
{
MessageBox.Show("Nije moguće zaprimiti poruku, komunikacijski port nije otvoren...1");
return;
}
}
#endregion
#region get response from modem
public void getResponse(object sender, SerialDataReceivedEventArgs e)
{
SerialPort serPort = (SerialPort)sender;
string input = serPort.ReadExisting();
if (input.Contains("+CMT:"))
{
if (input.Contains("AT+CMGF=1"))
{
string[] message = input.Split(Environment.NewLine.ToCharArray()).Skip(7).ToArray();
textBox1.Text = string.Join(Environment.NewLine, message);
}
this.Invoke((MethodInvoker)delegate
{
textBox1.Text = input;
});
}
else
{
return;
}
}
#endregion
#region initialize GSM
private void setGSM()
{
serialPort1.Open();
if (!serialPort1.IsOpen)
{
MessageBox.Show("Problem u komunikaciji sa modemom, port nije otvoren...!");
}
serialPort1.Write("AT+CMGF=1" + (char)(13));
serialPort1.Write("AT+CNMI=1,2,0,0,0" + (char)(13));
}
#endregion
#region setiranje timer-a...
private void timer1_Tick_1(object sender, EventArgs e)
{
timer1.Stop();
getMessage();
timer1.Start();
}
#endregion
}
}
This was only code for testing so it works but there is lot to fix and improve. Basically it will be a nice start for all that are searching something like this...
cheers.