Problem connecting Arduino Uno R3 to SIM900 GPRS/GSM shield and sending an SMS

Official Hardware Retired GSM Shield
21

Yes, there's no problem with doing that, other than additional clutter!

22

Please in your years of using SIM900 and other shields have you encountered any IDE related problem? What are the pros and cons of using New Release of an IDE vs Older Versions? Is there anywhere I can get information about IDE compatibility with shields and boards?

23

I still use an ancient version of the IDE but it works. When it stops working I'll upgrade.

As for your question about differences in the different IDEs, I would ask that further up the board. Try Installation and Troubleshooting, if it's wrong a Moderator will move it.

24

Hello
I hope I can help I was working with the SIM900 and the GPS Neo-6M I have already make calls send messages what I need is to transmit data to the web using the GPRS of which I intend to do is to obtain the coordinates with the GPS and by means of the SIM900 send the information obtained to the web.

I leave my code.

#include <TinyGPS.h>
#include <SoftwareSerial.h>

TinyGPS gps;
SoftwareSerial GPS(4, 3);
SoftwareSerial SIM(7, 8);

static void smartdelay(unsigned long ms);
static void print_float(float val, float invalid, int len, int prec);
const int conectar = 2;
const int led = 13;
int conectando = 0;

void setup() {
Serial.begin(9600);
SIM.begin(9600);
GPS.begin(9600);
pinMode(led, OUTPUT);
pinMode(conectar, INPUT);
}

void loop() {
float latitud, longitud;
gps.f_get_position(&latitud, &longitud);
Serial.println("Latitud Longitud ");
print_float(latitud, TinyGPS::GPS_INVALID_F_ANGLE, 11, 6);
print_float(longitud, TinyGPS::GPS_INVALID_F_ANGLE, 11, 6);
conectando = digitalRead(conectar);
if (conectando == 0) {
digitalWrite(led, 0);
delay(2000);
SIM.print("AT+CGATT");
SIM.print("AT+CGDCONT=1,"IP","internet.itelcel.com"");// Establece parametros PDP
SIM.print((char)13);
delay(2000);
SIM.print("AT+CSTT="internet.itelcel.com","webgprs","webgprs2003""); //Seteo de APN usuario y password
SIM.print((char)13);
delay(2000);
SIM.print("AT+CIICR");// Inicia la conexión
SIM.print((char)13);
delay(20000);
SIM.print("AT+CIFSR");
SIM.print((char)13);
delay(2000);
SIM.print("AT+CIPSTART="TCP","ubicatek.hol","80"");// Inicia conexion TCP o UDP
Serial.println("conexion realizada");
SIM.print((char)13);
SIM.print((char)10);
delay(5000);
SIM.print("AT+CIPSEND");// Envias Datos TCP o UDP
SIM.print((char)13);
SIM.print((char)10);
Serial.println("conexion para enviar");
delay(2000);
SIM.print("GET /home.php HTTP/1.1");// //Archivo donde se enviara el dato y el parametro a enviar
SIM.print("latitud=");
SIM.print(latitud, TinyGPS::GPS_INVALID_F_ANGLE);
SIM.print("&longitud=");
SIM.print(longitud, TinyGPS::GPS_INVALID_F_ANGLE);
Serial.println("Datos Enviados");
SIM.print((char)13);
SIM.print((char)10);
SIM.print("Host: ubicatek.hol.es");//
SIM.print((char)13);
SIM.print((char)10);
SIM.print((char)10);
SIM.print((char)13);
SIM.print((char)10);
SIM.print((char)26);
delay(10000);
SIM.print("AT+CIPCLOSE");// Cierra la conexión TCP o UDP
SIM.print((char)13);
delay(2000);
SIM.print("AT+CIPSHUT"); //Cierra el contesto PDP de GPRS
SIM.print((char)13);
delay(2000);
smartdelay(10000);
}

digitalWrite(led, 1);

}

thank your support