4 . ARDUINO GPRS DATA LOGGING CODE

#include <GSM.h>
//#include <SoftwareSerial.h>



#define APIKEY         "3kOj1mwZCZpurCzBdNqjYzIXn4OypY4WpiRuY9NtVTycg2HG"
#define FEEDID         1235963552  
#define USERAGENT      "DustBin"
#define PINNUMBER       ""
#define GPRS_APN       "www"
#define GPRS_LOGIN     ""
#define GPRS_PASSWORD  ""

GSMClient client;
GPRS gprs;
GSM gsmAccess;

long microsecondsToInches();
long microsecondsToCentimeters();


const int trigPin =12;
const int echoPin =13;

float n;
float sensorReading;
long duration,inches,cm;

char server[] = "api.xively.com";

unsigned long lastConnectionTime = 0;
boolean lastConnected = false;
const unsigned long postingInterval = 10*1000;


void setup(){
 
  //mySerial.begin(9600);

  Serial.begin(9600);
 
  boolean notConnected = true;

    while(notConnected)
  {
   
   
    if((gsmAccess.begin(PINNUMBER)==GSM_READY) &
        (gprs.attachGPRS(GPRS_APN, GPRS_LOGIN, GPRS_PASSWORD)==GPRS_READY))
      notConnected = false;
    else
    {
      Serial.println("Not connected");
      delay(100);
    }
  }
}

  void sendData(int thisData)
{
  if (client.connect(server, 80))
  {
    Serial.println("connecting...");
 
   client.print("PUT /v2/feeds/");
    client.print(FEEDID);
    client.println(".csv HTTP/1.1");
    client.print("Host: api.xively.com\n");
    client.print("X-ApiKey: ");
    client.println(APIKEY);
    client.print("User-Agent: ");
    client.println(USERAGENT);
    client.print("Content-Length: ");

int thisLength = 8 + getLength(thisData);
    client.println(thisLength);

    client.print("Content-Type: text/csv\n");
    client.println("Connection: close");
    client.println();

    client.print("sensor1,");
    client.println(thisData);
   
    Serial.print(thisData);
 }

else
  {
    Serial.println("connection failed");
    Serial.println();
    Serial.println("disconnecting.");
    client.stop();
  }

lastConnectionTime = millis();
}


int getLength(int someValue)
{
  int digits = 1;

  int dividend = someValue /10;
  while (dividend > 0)
  {
    dividend = dividend /10;
    digits++;
  }


return digits;
}



void loop(){

  n= StatusCheck();
 
  int sensorReading = n;

 


  if (client.available())
  {
     char c = client.read();
     Serial.print(c);
  }

  if (!client.connected() && lastConnected)
  {
    client.stop();
  }

if(!client.connected() && ((millis() - lastConnectionTime) > postingInterval))
  {
  sendData(sensorReading);
  }

lastConnected = client.connected();
}

float StatusCheck()
{
  pinMode(trigPin,OUTPUT);
digitalWrite(trigPin,LOW);
delayMicroseconds(2);
digitalWrite(trigPin,HIGH);
delayMicroseconds(10);
digitalWrite(trigPin,LOW);
pinMode(echoPin,INPUT);
duration=pulseIn(echoPin,HIGH);

inches= microsecondsToInches(duration);
cm= microsecondsToCentimeters(duration);

Serial.print(inches);
Serial.print("in, ");
Serial.print(cm);
Serial.print("cm");
Serial.println();
delay(100);

return cm;
}



long microsecondsToInches(long microseconds)
                        {
                          return microseconds/74/2;
                        }
long microsecondsToCentimeters(long microseconds)
                        {
                          return microseconds/29/2;
                       
                        }