GPS-GPRS

#include <Adafruit_GPS.h> 
#include <SoftwareSerial.h>
#include <String.h>
 
SoftwareSerial gprsSerial(7, 8);

SoftwareSerial gpsSerial(3, 2);
Adafruit_GPS GPS(&gpsSerial);
#define GPSECHO  false
boolean usingInterrupt = false;
void useInterrupt(boolean); // Func prototype keeps Arduino 0023 happy
String lat = "0.0";
String lon = "0.0";
String spd = "0.0";
 
void setup(){
  gprsSerial.begin(19200);               // the GPRS baud rate   
  Serial.begin(115200);    // the GPRS baud rate 
 
  GPS.begin(9600);
  pinMode(9, OUTPUT);
  digitalWrite(9,LOW);
  delay(100);
  digitalWrite(9,HIGH);
  delay(500);
  digitalWrite(9,LOW);
  delay(100);
  pinMode(13, OUTPUT);
  digitalWrite(13,LOW);
  GPS.sendCommand(PMTK_SET_NMEA_OUTPUT_RMCGGA);
  GPS.sendCommand(PMTK_SET_NMEA_UPDATE_1HZ);   // 1 Hz update rate
  useInterrupt(true);

  delay(1000);
  gpsSerial.println(PMTK_Q_RELEASE);
}
 
 SIGNAL(TIMER0_COMPA_vect) {
  char c = GPS.read();
#ifdef UDR0
  if (GPSECHO)
    if (c) UDR0 = c;  
#endif
}

void useInterrupt(boolean v) {
  if (v) {
    OCR0A = 0xAF;
    TIMSK0 |= _BV(OCIE0A);
    usingInterrupt = true;
  } else {
    TIMSK0 &= ~_BV(OCIE0A);
    usingInterrupt = false;
  }
}

uint32_t timer = millis();
void loop(){
   SubmitHttpRequest();
    if (gprsSerial.available())
    Serial.write(gprsSerial.read());
    if (! usingInterrupt) {
    char c = GPS.read();
    if (GPSECHO)
    if (c) Serial.print(c);
 }
  
  if (GPS.newNMEAreceived()) {
    if (!GPS.parse(GPS.lastNMEA()))   // this also sets the newNMEAreceived() flag to false
      return;  // we can fail to parse a sentence in which case we should just wait for another
  }

  if (timer > millis())  timer = millis();
  if (millis() - timer > 500) { 
    timer = millis(); // reset the timer
    Serial.print("\nTime: ");
    Serial.print(GPS.hour, DEC); Serial.print(':');
    Serial.print(GPS.minute, DEC); Serial.print(':');
    Serial.print(GPS.seconds, DEC); Serial.print('.');
    Serial.println(GPS.milliseconds);
    Serial.print("Date: ");
    Serial.print(GPS.day, DEC); Serial.print('/');
    Serial.print(GPS.month, DEC); Serial.print("/20");
    Serial.println(GPS.year, DEC);
    Serial.print("Fix: "); Serial.print((int)GPS.fix);
    Serial.print(" quality: "); Serial.println((int)GPS.fixquality); 
    if (GPS.fix) {
      Serial.print("Location: ");
      Serial.print(GPS.latitude, 4); Serial.print("-"); Serial.print(GPS.lat);
      Serial.print(", "); 
      Serial.print(GPS.longitude, 4); Serial.println(GPS.lon);
      Serial.print("Location (in degrees, works with Google Maps): ");
      Serial.print(GPS.latitudeDegrees, 4);
      lat = String(GPS.latitudeDegrees, 4);
      Serial.print(", "); 
      Serial.println(GPS.longitudeDegrees, 4);
      lon = String(GPS.longitudeDegrees, 4);
      Serial.print("Speed (knots): "); Serial.println(GPS.speed)*1.151;
      spd = String((GPS.speed)*1.151);
      Serial.print("Angle: "); Serial.println(GPS.angle);
      Serial.print("Altitude: "); Serial.println(GPS.altitude);
      Serial.print("Satellites: "); Serial.println((int)GPS.satellites);
    }
  }
}

///SubmitHttpRequest()
///this function is submit a http request
///attention:the time of delay is very important, it must be set enough 
void SubmitHttpRequest()
{
//  gprsSerial.println("AT+CSQ");
//  delay(100);
 
//  ShowSerialData();// this code is to show the data from gprs shield, in order to easily see the process of how the gprs shield submit a http request, and the following is for this purpose too.
 
//  gprsSerial.println("AT+CGATT?");
//  delay(100);
 
//  ShowSerialData();
 
  gprsSerial.println("AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\"");//setting the SAPBR, the connection type is using gprs
  delay(1000);
 
//  ShowSerialData();
 
  gprsSerial.println("AT+SAPBR=3,1,\"APN\",\"CMNET\"");//setting the APN, the second need you fill in your local apn server
  delay(2000);
//  delay(4000);
 
//  ShowSerialData();
 
  gprsSerial.println("AT+SAPBR=1,1");//setting the SAPBR, for detail you can refer to the AT command mamual
  delay(1000);
//  delay(2000);
 
//  ShowSerialData();
 
  gprsSerial.println("AT+HTTPINIT"); //init the HTTP request
  delay(1000);
//  delay(2000);
  
//  ShowSerialData();
 
  gprsSerial.println("AT+HTTPPARA=\"URL\",\"http://198.74.52.26/map.php?lat="+lat+"&lon="+lon+"&speed="+spd+"\"");// setting the httppara, the second parameter is the website you want to access
  delay(500);
//  delay(1000);
 
//  ShowSerialData();
 
  gprsSerial.println("AT+HTTPACTION=0");//submit the request 
//  delay(10000);//the delay is very important, the delay time is base on the return from the website, if the return datas are very large, the time required longer.
  //while(!mySerial.available());
 
//  ShowSerialData();
 
//  gprsSerial.println("AT+HTTPREAD");// read the data from the website you access
//  delay(300);
 
//  ShowSerialData();
 
//  gprsSerial.println("");
//  delay(100);
}

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