#include <TinyGPS++.h>
#include "SoftwareSerial.h"
// TXD(SIM800L) <---> RX(ARDUINO)
// RXD(SIM800L) <---> TX(ARDUINO)
// RX(NEO6_GPS) <---> D3(ARDUINO)
// TX(NEO6_GPS) <---> D2(ARDUINO)
#define Buzzer 13  //   +(Buzzer) <---> D6(Arduino)

const unsigned long eventInterval = 60000;
unsigned long previousTime = 0;
String stringMessage = "";
String lonGPS = "";
String latGPS = "";
String lonGPS_OLD = "";
String latGPS_OLD = "";
char Buf[70];
TinyGPSPlus gps;
// The serial connection to the GPS device
SoftwareSerial ss(2, 3);

void setup() {
  //Serial.begin(9600);   // PC
  ss.begin(9600);  // GPS
  Serial.begin(9600);  // GSM

  pinMode(Buzzer, OUTPUT);
  digitalWrite(Buzzer, LOW);
  delay(10000);
  /////////////////////////////////////////////////////////////////////////////////////////////
  //Serial.println ("Sending Message");
  Serial.println("AT+CMGF=1");    //Sets the GSM Module in Text Mode
  delay(1000);
  //Serial.println ("Set SMS Number");
  //                            *********
  Serial.println("AT+CMGS=\"+966566152105\"\r"); //Mobile phone number to send message
  delay(1000);
  //Serial.println ("Set SMS Content");
  Serial.println("Ardunio: OK");//"GSM Connected, Project is ON");// Messsage content
  delay(100);
  //Serial.println ("Finish");
  Serial.println((char)26);// ASCII code of CTRL+Z
  delay(1000);
  //Serial.println ("Message has been sent");
  /////////////////////////////////////////////////////////////////////////////////////////////
}

void loop() {

  readGPS_Data();

}//end of LOOP


void displayInfo()
{
  //Serial.print(F("Location: "));
  if (gps.location.isValid())
  {
    SendSMS();
    lonGPS = String(gps.location.lng(), 6);
    latGPS = String(gps.location.lat(), 6);
    //Serial.print(latGPS);
    //Serial.print(F(","));
    //Serial.print(lonGPS);
  }
  else
  {
    //Serial.print(F("INVALID"));
  }
/*
  //Serial.print(F("  Date/Time: "));
  if (gps.date.isValid())
  {
    //Serial.print(gps.date.month());
    //Serial.print(F("/"));
    //Serial.print(gps.date.day());
    //Serial.print(F("/"));
    //Serial.print(gps.date.year());
  }
  else
  {
    //Serial.print(F("INVALID"));
  }

  //Serial.print(F(" "));
  if (gps.time.isValid())
  {
    digitalWrite(Buzzer, HIGH);
    if (gps.time.hour() < 10) //Serial.print(F("0"));
    //Serial.print(gps.time.hour());
    //Serial.print(F(":"));
    if (gps.time.minute() < 10) //Serial.print(F("0"));
    //Serial.print(gps.time.minute());
    //Serial.print(F(":"));
    if (gps.time.second() < 10) //Serial.print(F("0"));
    //Serial.print(gps.time.second());
    //Serial.print(F("."));
    if (gps.time.centisecond() < 10) //Serial.print(F("0"));
    //Serial.print(gps.time.centisecond());

  }
  else
  {
    //Serial.print(F("INVALID"));
  }
*/
  //Serial.println();
}

void readGPS_Data() {
  // This sketch displays information every time a new sentence is correctly encoded.
  while (ss.available() > 0)
    if (gps.encode(ss.read()))
      displayInfo();
}

void SendSMS() {

  stringMessage = "http://www.google.com/maps/place/" + latGPS + "," + lonGPS;
  stringMessage.toCharArray(Buf, 70);
  //Serial.println(Buf);
  if (millis() - previousTime >= eventInterval) {
    if (lonGPS_OLD != lonGPS && latGPS_OLD != latGPS) {
      /* Event code */
      //Serial.println ("Sending Message");
      Serial.println("AT+CMGF=1");    //Sets the GSM Module in Text Mode
      delay(1000);
      //Serial.println ("Set SMS Number");
      //                            *********
      Serial.println("AT+CMGS=\"+966566152105\"\r"); //Mobile phone number to send message
      delay(1000);
      //Serial.println ("Set SMS Content");
      Serial.println(Buf);//"GSM Connected, Project is ON");// Messsage content
      delay(100);
      //Serial.println ("Finish");
      Serial.println((char)26);// ASCII code of CTRL+Z
      delay(1000);
      //Serial.println ("Message has been sent");
      lonGPS_OLD = lonGPS;
      latGPS_OLD = latGPS;
      /* Update the timing for the next time around */
      previousTime = millis();
    }
  }
}