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#include "string.h"


char s[] ="$GPRMC,214603.000,A,4634.54557,N,03047.50473,E,0.00,0.00,040617,,,A*6E";
char * p;
int a = 0;

void setup(void) {
Serial.begin(115200);

p = strtok (s,",");

  for(int i=0; p != NULL; i++)
  {
      a++;
      if (a == 5) {         // тут указываю число расчлененной части S
        Serial.println(p);
      }
  
    p = strtok (NULL, ",");
  }
    
}

void loop(void) {}

#define DEBUG true

char byteGPS=-1;
char linea[300] = "";
char comandoGPR[7] = "$GPRMC";
int cont=0;
int bien=0;
int conta=0;
int indices[13];

int GPS_time=30;                        // When the board gets the 30 times location information successfully and the location information will be send by sms.      
String target_phone = "+380634250000"; // Your phone number,be careful need to add a country code before the cellphone number

String GPS_position="";
int GPS_position_count=0;


const char resource[] = "130402213013,+380688260000,GPRMC,175135.000,A,";
const char cord[] = "6146.4979,N,03421.2399,E";
const char stat[] = ",1.92,21.48,100817,,,A*5B,F,, imei:867567021260000,00,-16.4,F:3.73V,0,139,49646,250,99,1478,68A7\n\r";


void setup()
{
  Serial.begin(115200);
  Serial1.begin(115200);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(8,OUTPUT);
  digitalWrite(5, HIGH); 
  digitalWrite(4, LOW); 
  digitalWrite(8, LOW); 
  delay(2000);
  digitalWrite(8, HIGH); 
  delay(3000);       
  digitalWrite(8, LOW);
  Serial.println("A7 Power ON!");
  sendData("AT+GPS=0",3000,DEBUG);     //Close GPS
  for(int i=0;i<2;i++){                //Make sure the GPS has been turned on
    sendData("AT+GPSRD=1",1000,DEBUG);
    Serial1.println("AT+GPS=1");
  }
  Serial.println("*********************************************************");
  Serial.println("**If don`t display 'GPS positioning....',please reboot.**");
  Serial.println("*********************************************************");
}

void loop()
{
    testgps();
}

void testgps(){
  while(Serial1.available()){
   byteGPS=Serial1.read();  
  // Read a byte of the serial port
   if (byteGPS == -1) {       
    // See if the port is empty yet
   } 
   else {
     // note: there is a potential buffer overflow here!
     linea[conta]=byteGPS;        // If there is serial port data, it is put in the buffer
     conta++;                      
     //Serial.print(byteGPS);    // '//',есди удалить то будут отправлятся все данные 
     if (byteGPS==13){
      // If the received byte is = to 13, end of transmission
      // note: the actual end of transmission is <CR><LF> (i.e. 0x13 0x10)
      cont=0;
      bien=0;
      // The following for loop starts at 1, because this code is clowny and the first byte is the <LF> (0x10) from the previous transmission.
       for (int i=1;i<7;i++){     // Verifies if the received command starts with $GPR
         if (linea[i]==comandoGPR[i-1]){
           bien++;
         }
       }
       if(bien==6){ 
        // If yes, continue and process the data
        //Data Partitioning
         for (int i=0;i<300;i++){
           if (linea[i]==','){    // check for the position of the  "," separator
             // note: again, there is a potential buffer overflow here!
             indices[cont]=i;
             cont++;
           }
           if (linea[i]=='*'){    // ... and the "*"
             indices[12]=i;
             cont++;
           }
         }
         //panel data, for example:Direction (E/W):Longitude-Direction(N/S):Latitude<--->E:11350.51872-N:2236.40687        
         for(int i=5;i>1;i--){
           for (int j=indices[i];j<(indices[i+1]-1);j++){
             GPS_position+=linea[j+1];
           }
           if((i==5)||(i==3)){
             GPS_position+=":";  
           }else if(i==4){
             GPS_position+="-";   
           }
         }
         //If the return ":-:", it means empty data, continue positioning 
         if(GPS_position==":-:"){
          Serial.println("GPS positioning....");
         }else{
            Serial.println(GPS_position);
            GPS_position_count++;
            //When GPS_position_count is equivalent to GPS_time, stop positioning and start to send sms messages
            if(GPS_position_count==GPS_time){
            GPS_position_count=0;          //Reset count
            sendData("AT+GPS=0",1000,DEBUG);
            delay(1000); 
            //SendTextMessage(GPS_position); //SMS
            TcpGprsMessage(GPS_position); //Internet
            sendData("AT+GPS=1",1000,DEBUG); 
           }
                  
         }
       }
       GPS_position="";
       conta=0;                    // Reset the buffer
       for (int i=0;i<300;i++){    //  
       linea[i]=' ';             
       }                
     }
   }  
   }
}

void TcpGprsMessage(String message){

     sendData("AT+CREG?",3000,DEBUG);     
     sendData("AT+CGATT=1",1000,DEBUG);
     sendData("AT+CGDCONT=1,\"IP\",\"www.ab.kyivstar.net\"",1000,DEBUG);
     sendData("AT+CGACT=1,1",1000,DEBUG);
     sendData("AT+CIPSTART=\"TCP\",\"88.198.136.232\",10001",3000,DEBUG);
     sendData("AT+CIPSEND=80",1000,DEBUG);
     sendData(String("GET ") + resource + message + stat, 2000,DEBUG); 
     delay(1000);
     sendData("AT+CIPCLOSE",2000,DEBUG);     //Close TCP
     delay(100);

     //sendData(String("GET ") + resource + imei + message,2000,DEBUG); 
}

void SendTextMessage(String message)
{ 
  sendData("AT+CMGF=1",5000,DEBUG);            //Set the SMS in text mode
  delay(100);
  sendData("AT+CMGS="+target_phone,2000,DEBUG);//send sms message to the cellphone , be careful need to add a country code before the cellphone number
  delay(100);
  sendData(message,2000,DEBUG);                //the content of the message
  delay(100);
  Serial1.println((char)26);                  //the ASCII code of the ctrl+z is 26
  delay(100);
  sendData("",1000,DEBUG);                     //Clear serial data
  delay(100);
}

void sendData(String command, const int timeout, boolean debug)
{
    String response = "";    
    Serial1.println(command); 
    long int time = millis();   
    while( (time+timeout) > millis()){
      while(Serial1.available()){       
        response += (char)Serial1.read(); 
      }  
    }    
    if(debug){
      Serial.print(response);
    }    
}