Posting data using Arduino and SIM900 (GPRS/GSM)

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wengan
Posts: 1
Joined: Wed Mar 30, 2016 10:48 am

Posting data using Arduino and SIM900 (GPRS/GSM)

Post by wengan » Wed Mar 30, 2016 11:22 am

Hi!

I am using Arduino and a SIM900 shield, in order to have a weather station in a place without wifi connection but with GPRS/GSM

I think I having problems on how a POST or GET request works using AT Commands.

I am also using the phant library, so am I using it right?

Code: Select all

#include <SoftwareSerial.h>
SoftwareSerial mySerial(7, 8); // se utilizan estos pines ya que el shield sim900 requiere los pines 7 y 8 para la comunicacion
// A la playa sim900 se le entregan solo comandos AT

#include <Arduino.h>


/////////////////////////
//                     //
//     PHANT STUFF     //
//                     //
/////////////////////////
#include <Phant.h>

//Phan phant("Ip servidor o dominio", "Clave publica", "Clave privada");
//Phant phant("data.sparkfun.com", "VGb2Y1jD4VIxjX3x196z", "9YBaDk6yeMtNErDNq4YM");
Phant phant("data.sparkfun.com","PUBLIC_KEY","PRIVATE_KEY");

void setup()
{
  mySerial.begin(19200); // baudrate de la comunicacion serial Arduino-SIM900, debe ser 19200   
  Serial.begin(9600);    // Comunicacion serial PC-Arduino, aqui se elige cualquier cosa
  delay(500);
}

void loop()
{

  //Creando lo que se va a postear
  phant.add("humedad",0);
  phant.add("temperatura",0);
  //after start up the program, you can using terminal to connect the serial of gprs shield,
  //if you input 't' in the terminal, the program will execute SendTextMessage(), it will show how to send a sms message,
  //if input 'd' in the terminal, it will execute DialVoiceCall(), etc.
  if (Serial.available())
    switch(Serial.read())
    {
    case 'H':
      Send2Spark();
      // Probar phant 
    } 
  if (mySerial.available())
    Serial.write(mySerial.read());
}

void Send2Spark()
{
  Serial.println("--- Send2Spark ---");
  // Apaga el GPRS y pone la placa en el status IPINIT: 
  mySerial.println("AT+CIPSHUT");
  delay(100);
  ShowSerialData();
  //Check attach status
  mySerial.println("AT+CGATT=1");// Hace la conexion GPRS
  delay(2000);
  ShowSerialData(); 
  mySerial.println("AT+CSTT=\"internet.simple\",\"\",\"\"");//start task and setting the APN,
  delay(1000);
  ShowSerialData();
  mySerial.println("AT+CIICR");//bring up wireless connection
  delay(5000);
  ShowSerialData(); 
  mySerial.println("AT+CIFSR");//get local IP adress
  delay(2000);
  ShowSerialData();
  mySerial.println("AT+CIPSTART=\"tcp\",\"data.sparkfun.com\",\"80\"");//start up the connection
  delay(5000);
  ShowSerialData();
  mySerial.println("AT+CIPSEND=?");//start up the connection
  delay(2000);
  ShowSerialData();
  mySerial.println("AT+CIPSEND");//start up the connection
  delay(2000);
  ShowSerialData();

  // haciendo la request POST
  mySerial.print(phant.post());
  mySerial.write(26);
  delay(3000);
  ShowSerialData();

  // mySerial.print("POST /input/dZ5qYNvA27fAOrZXv50V.txt HTTP/1.1\x1A");
  // ShowSerialData();
  // mySerial.println("Host: data.sparkfun.com");
  // ShowSerialData();
  // mySerial.println("Phant-Private-Key: eEvVD9Rl7mh4N2REd8yY");
  // ShowSerialData();
  // mySerial.println("Connection: close");
  // ShowSerialData();
  // mySerial.println("Content-Type: application/x-www-form-urlencoded");
  // ShowSerialData();
  // mySerial.println("Content-Length: 26");
  // ShowSerialData();
  // mySerial.println("humedad=post&temperatura=0");
  // ShowSerialData();
  delay(4000);
  ShowSerialData();
  mySerial.println("AT+CIPCLOSE");//close the connection
  delay(100);
  ShowSerialData();

  // Las conexiones en ese orden respetan la sucesion de estados planteados en la SIM900
  //  IPINITIAL IPSTART IPCONFIG IPGPRSA.

}
void ShowSerialData()
{
  while(mySerial.available()!=0)
    Serial.write(mySerial.read());
}

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