Send messages Using AT Commands C#

[pinoyprogammer]

Add the Class to your Solution / Project

Usage

/*If you want to send a message*/

using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace BulkMessagingAppPC
{
class SmsEngine
{
SerialPort serialPort;
Random rnd = new Random();
int interval = 0;
public SmsEngine(string comPort, int interval)
{
this.serialPort = new SerialPort();
this.serialPort.PortName = comPort;
this.serialPort.BaudRate = 9600;
this.serialPort.Parity = Parity.None;
this.serialPort.DataBits = 8;
this.serialPort.StopBits = StopBits.One;
this.serialPort.Handshake = Handshake.RequestToSend;
this.serialPort.DtrEnable = true;
this.serialPort.RtsEnable = true;
this.serialPort.NewLine = System.Environment.NewLine;
this.interval = interval;

}

public bool sendSms(string number, string message)
{
Application.DoEvents();
string messages = null;
messages = message;
if (this.serialPort.IsOpen == true)
{
try
{
Application.DoEvents();
switch (interval)
{
case 0:
Thread.Sleep(rnd.Next(1000, 2000));
break;
case 1:
Thread.Sleep(rnd.Next(2000, 3000));
break;

case 2:
Thread.Sleep(rnd.Next(3000, 4000));
break;

case 3:
Thread.Sleep(rnd.Next(4000, 5000));
break;
case 4:
Thread.Sleep(rnd.Next(5000, 6000));
break;
case 5:
Thread.Sleep(rnd.Next(6000, 7000));
break;

default:
Thread.Sleep(4000);
break;
}

this.serialPort.WriteLine(“AT” + (char)(13));
Thread.Sleep(4);
this.serialPort.WriteLine(“AT+CMGF=1” + (char)(13));
Thread.Sleep(5);
this.serialPort.WriteLine(“AT+CMGS=\”” + number + “\””);
Thread.Sleep(10);
this.serialPort.WriteLine(“” + messages + (char)(26));
Application.DoEvents();
}
catch (Exception ex)
{
MessageBox.Show(ex.Source);
}
return true;
}
else
return false;
}
public bool sendSms(string cellNo, string sms, int times)
{
string messages = null;
messages = sms;
if (this.serialPort.IsOpen == true)
{
for(int i = times; times > 0; times–)
{
try
{
Application.DoEvents();
this.serialPort.WriteLine(“AT” + (char)(13));
Thread.Sleep(4);
this.serialPort.WriteLine(“AT+CMGF=1” + (char)(13));
Thread.Sleep(5);
this.serialPort.WriteLine(“AT+CMGS=\”” + cellNo + “\””);
Thread.Sleep(10);
this.serialPort.WriteLine(“” + messages + (char)(26));
Application.DoEvents();
}
catch (Exception ex)
{
MessageBox.Show(ex.Source);
}
}
return true;
}
else
return false;
}

public void openPort()
{
if (this.serialPort.IsOpen == false)
{
this.serialPort.Open();
}
}

public void closePort()
{
if (this.serialPort.IsOpen == true)
{
this.serialPort.Close();
}
}
}

}

Get the files on Github!
https://github.com/bsitcedric/C-smsAT