Send and Receive SMS from Arduino Using GSM Modem

This post shows the basic use of GSM Modem interfaced with Arduino Uno which Sends and receives SMS .You could select the sending or receiving mode and  you can even Chat with your Buddies . Yup , i have tried :-)





Get the right things.....

Components needed :-

1. Arduino Uno
2. GSM modem SIM 900 with a 12v battery supply or 12v Adapter
3. Bread board(Optional)
4. Jumper wires.
5. Arduino IDE software (latest version).
6. And Enthusiasm :-)

GSM modem

Power Supply GMS Modem SIM 900 :-

Be careful while selecting your GSM modem . The modem that i am using needs 12v/1A supply .
There are also other types which could run on just 5V. So be careful and don't burn your board .

12 V Adaptor to power GSM Modem

Coding :-

Connect the arduino to PC while uploading

Download Link--> https://drive.google.com/file/d/0BxsMZLQokV3CX2Ewc0EzWTZJMUk/view?usp=sharing

or just copy paste it into Arduino IDE



// LK's code
// lookforlk.blogspot.com
// lookforlk.blogspot.com
#include <SoftwareSerial.h>
SoftwareSerial mySerial(9, 10);  // tx,rx
void setup()
{
  mySerial.begin(9600);   // Setting the baud rate of GSM Module
  Serial.begin(9600);  
  delay(100);
}
void loop()
{
  if (Serial.available()>0)
   switch(Serial.read())
  {
    case 's':
      SendMessage();
      break;
    case 'r':
      RecieveMessage();
      break;
  }

 if (mySerial.available()>0)
   Serial.write(mySerial.read());
}
 void SendMessage()
{
  mySerial.println("AT+CMGF=1");
  delay(1000);  // Delay of 1000 milli seconds or 1 second
  mySerial.println("AT+CMGS=\"+91 x \"\r"); // Replace x with mobile number
  delay(1000);
  mySerial.println("I am LK Karthikeya texing from GSM module");// The SMS text you want to send  change any msg
  delay(100);
   mySerial.println((char)26);
  delay(1000);
}
 void RecieveMessage()
{
  mySerial.println("AT+CNMI=2,2,0,0,0");
  delay(1000);
 }

Code Screenshot , the code looks like this :-) 

Connection:-

Hardware wiring is very simple. It needs just 3 wiring :

1.Connect TX to Arduino digital pin 9
2.Connect RX to Arduino Digital pin 10
3.Connect GND to Arduino's GND

And don't forget to insert sim into GSM modem

Note :- 

   
Upload code into arduino then connect the GSM modem otherwise you may encounter error like "Error"  .

Execution :-

Before execution make sure the hardware connection and coding part is done correctly

1.In arduino ,Open the Serial monitor (Ctrl +Shift + M) or tools -->Serial Monitor

2. Now Type and enter 's' for sending text (Check the Image)

The text that we entered in program has not been displayed but the full text will be sent no worries

Now check your mobile, you would have received an sms

3 To receive Sms from someone , just open serial monitor again and Type 'r' . This will show the sms and the number of the sim (Check the Image)

Yup i succeeded doing it . check My SS(ScreenShot) last image

Check and Arduino's serial monitor and Screenshot


 If you face any issues, you can contact me.I can help you online .

Regards,

lkkarthikeya@gmail.com

#SMS
#Send
#Receive
#DIY
#Wireless
#Arduino
#project
#Code