Connecting GSM With Arduino Mega 2560

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
• Jumber Wires

GSM:

• GSM means Global System For Mobile, it can be used to send and receive  message in 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 in 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);
}

Explanation:

• For sending message it will have mobile number in the code.
• For receiving message it will have the SIM card inside the GSM modem.
• When the message is sent, the LED glows. 

Output:

                                          
                                                                            Figure 3: Output 

   

Read more articles on Arduino:

• Windows Remote Arduino - Part One
• Controlling LED Using Arduino Mega 2560