Hi, do i need to have

[AJISH ALFRED]

Hi,

 

do i need to have internet plan on SIM card or what?

 

Defenitely you would need it !

 

You can learn all commnds for sim900 from this link

 

http://www.simcom.us/act_admin/supportfile/SIM900_ATC_V1.00.pdf

 

Also I found this piece of code, you might find some useful logic from it.

 

void setup(){

Serial.begin(9600);

Serial.println("AT+CGATT?");

delay(1000);

Serial.println("AT+CSNS=4");

delay(1000);

Serial.println("AT+CSTT="TATA.DOCOMO.INTERNET","",""");

delay(1000);

Serial.println("AT+CIICR");

delay(1000);

Serial.println("AT+CIFSR");

delay(1000);

Serial.println("AT+CIPSTART="TCP","google.com","80"");

delay(1000);

Serial.println("AT+CIPSEND");

delay(1000);

Serial.println("AT+CIPCLOSE");

delay(1000);

Serial.println("AT+CIPSHUT");



}

void loop(){

dat = Serial.read();

Serial.print(dat);

delay(1000);

}