Sending and Receiving SMS using GSM module

Hello everyone!

Hope you are being benefited from the information which I shared with you. Many of you have been working with the GSM based projects whether it is for home automation, automation, tracking and the list goes on. With the view to help everyone having problem working GSM we prepared a video for Sending and Receiving SMS with GSM module available on YouTube or you can see below.

With the target to help with the code we have shared it with you through this. All the steps are crystal clear as the video provides. We have arduino mega 2560 and GSM 900 module. The transmitter and receiver of the arduino is connected to the vice-versa of GSM module. The Ground is made common. Set the baud rate 2400 since 9600 is too high that does not support.

The code consists of AT commands (Click to download pdf of AT Command Reference) for receiving and sending SMS using GSM. 

The code used is shown below with the different probable conditions:

1) If you want to run your GSM code only once then use the program

void setup() 

{

  // put your setup code here, to run once:

  Serial.begin(2400);  //Baud rate of the GSM/GPRS Module 

  Serial.print("\r");

  delay(1000);                  

  Serial.print("AT+CMGF=1\r");    

  delay(1000);

  Serial.print("AT+CMGS=\"+xxxxxxxxxxxxx\"\r");    //Number to which you want to send the sms     with country code

  delay(1000);

  Serial.print("message from gsm module\r");   //The text of the message to be sent

  delay(1000);

  Serial.write(0x1A);

  delay(1000); 

}

void loop() 

{

//enter your program;

}

2) If you want it to run repeatedly then use the program 

void setup() 

{

//enter setup information

}

void loop() 

{

  // put your main code here, to run repeatedly:

  Serial.print("\r");

  delay(1000);                  

  Serial.print("AT+CMGF=1\r");    

  delay(1000);

  Serial.print("AT+CMGS=\"+xxxxxxxxxxxxx\"\r");    //Number to which you want to send the sms

  delay(1000);

  Serial.print("message from gsm module\r");   //The text of the message to be sent

  delay(1000);

  Serial.write(0x1A);

  delay(1000); 

}

3) If you want to create different data for the GSM and transfer different SMS at different conditions then use the program 

void setup() 

{

//enter setup information

}

void gsmsetup1() 

{

  // put your setup code here, to run once:

  Serial.begin(2400);  //Baud rate of the GSM/GPRS Module 

  Serial.print("\r");

  delay(1000);                  

  Serial.print("AT+CMGF=1\r");    

  delay(1000);

  Serial.print("AT+CMGS=\"+xxxxxxxxxxxxx\"\r");    //Number to which you want to send the sms     with country code

  delay(1000);

  Serial.print("message from gsm module\r");   //The text of the message to be sent

  delay(1000);

  Serial.write(0x1A);

  delay(1000); 

}

void loop()

{

  gsmsetup1(); //call gsmsetup1

}

You can add number of different setups and call it on the loop.

All these are tested and they worked absolutely great. Hope this was a wealthy information and you enjoyed it. Many of you might have already viewed and subscribe my channel and requested for code and if you don't have please do like, share, comment and subscribe. Any problems feel free to drop it down.

Please visit Sending or Receiving SMS using GSM module (contd.......) or click here for receiving portion.