Connecting GSM With Arduino Mega 2560

Sr Karthiga
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Article

Introduction

In this article, I will explain about sending and receiving emergency warning messages from Arduino Mega 2560. It can easily send and receive messages at the time of emergency.

Parts Of List

Arduino Mega 2560
GSM
Bread Board
Jumper Wires

GSM:

GSM means Global System For Mobile, it can be used to send and receive a message in a critical area.
It can also act as the GSM modem.
It can have a PIN configuration and MIC is also attached.

Figure 1: GSM Board

Connection:

ArduinoMega 2560 To GSM Board:

Connect the RX pin of the GSM board to the 04 of the Arduino Mega 2560.
Connect the TX pin of the GSM board to the 03 of the Arduino Mega 2560.
Connect the 5V power supply to the Arduino Mega 2560.
At last, connect the 12 DC voltage to the GSM board.

LED To Arduino Mega2560:

Connect the positive pin is digital pin 11 in the Arduino Mega2560
Connect the negative pin in the GND to the Arduino Mega 2560.

Figure 2: Connection from GSM to Arduino Mega2560

Programming:

#include<SoftwareSerial.h>
SoftwareSerial firstSerial(03,04); RX/TX
int led=11;
void setup()
{
pinMode(led,OUTPUT);
firstSerial.begin(9600);
Serial.begin(9600);
delay(1000);
}
void loop()
{
if(Serial.available()>0)
digitalWrite(led,HIGH);
switch(Serial.read());
}
void sndmsg()
{
firstSerial.println("AT+CMGF=1");
delay(1000);
firstSerial.println("AT+CMGS=\"+xxxxxxxxxx\"\r"); //Enter Your Mobile Number instead XXXX while Testing
delay(1000);
firstSerial.println("sms messagers sender ");
delay(100);
firstSerial.println((char)23);
delay(1000);
}