32u4 with A7 GPRS/GSM

/*
 * Created by Keen
 * Modified by Keen 
 * Date: 11/04/2017
 */
#include<stdio.h>
#include<string.h>
#define DEBUG true
String target_phone = "+861**********6"; // Your phone number, not number of 32U4 with A7/GSM/GPS.

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); 
  Serial.println("After 2s, test begin!!");
  delay(2000);
  funtion_test();
}

void loop()
{
  if (Serial1.available()>0) {
    Serial.write(Serial1.read());
  }
  if (Serial.available()>0) {
    Serial1.write(Serial.read());
  }
}

void funtion_test(){
   Serial.println("Test begin!!");
   digitalWrite(8, HIGH); 
   delay(3000);       
   digitalWrite(8, LOW); //Power ON..
   Serial.println("A7 Power ON!");
   Serial.println("You may receive the AT   OK"); 
   sendData( "AT",1000,DEBUG);
   delay(500);
   digitalWrite(5, LOW);  //Sleep
   Serial.println("A7 go to sleep now!");
   delay(3000);
   Serial.println("test GPS function");
   testGPS();          //no call, A7 sleeping   
   sendData( "AT",1000,DEBUG);
   delay(500);
   Serial.println("if you receive GPS data,the sleep test failed!");
   digitalWrite(5, HIGH);   // wake up
   delay(1000);
   Serial.println("A7 WAKE UP!"); 
   Serial.println("test whether wake up or not, if OK, A7 wake up"); 
   sendData( "AT",1000,DEBUG);
   delay(500);     
   digitalWrite(4, HIGH); // power off A6
   Serial.println("A7 power off!");
   delay(3000);
   digitalWrite(4, LOW);
   Serial.println("print AT and you not receive OK"); 
   sendData( "AT",1000,DEBUG);
   delay(500); 
   Serial.println("A7 not Respond"); 
   digitalWrite(8, HIGH);           //POWER UP
   delay(3000);       
   digitalWrite(8, LOW);
   delay(3000);
   Serial.println("A7 Power ON!"); 
   Serial.println("................................."); 
   sendData( "AT",1000,DEBUG); //
   delay(1000);
   Serial.println("The funtion is Get GPS..."); 
   testGPS();
   Serial.println("The funtion is Dial Voice Call..."); 
   delay(1000);
   DialVoiceCall();
   Serial.println("The funtion is Send SMS ..."); 
   delay(1000);
   SendTextMessage();
   Serial.println("This function is submit a HTTP request...");
   delay(1000);
   TCP_GPRS();
   Serial.println("All the test of 32U4 with A7 is complete!");
}

void testGPS(void){
  sendData("AT+GPS=1",1000,DEBUG);     
  sendData("AT+GPSRD=1",3000,DEBUG);
  sendData("AT+GPS=0",10000,DEBUG);
}

void TCP_GPRS(){
   sendData("AT+CREG?",5000,DEBUG); //Query network registration
   delay(100);
   sendData("AT+CGATT=1",5000,DEBUG);
   delay(100); 
   sendData("AT+CGDCONT=1,\"IP\",\"CMNET\"",2000,DEBUG);//setting PDP parameter 
   delay(100); 
   sendData("AT+CGACT=1,1",10000,DEBUG); //Activate PDP, open Internet service
   delay(100);  
   sendData("AT+CIPSTART=\"TCP\",\"www.baidu.com\",80",10000,DEBUG);
   delay(100);
   sendData("AT+CIPSEND=5,\"12345\"",2000,DEBUG); //Send string "12345" 
   delay(100); 
   sendData("AT+CIPCLOSE",2000,DEBUG);     //Close TCP
   delay(100); 
   /*
     sendData("AT+CREG?",3000,DEBUG);     
     sendData("AT+CGATT=1",1000,DEBUG);
     sendData("AT+CGDCONT=1,\"IP\",\"CMNET\"",1000,DEBUG);
     sendData("AT+CGACT=1,1",1000,DEBUG);
     sendData("AT+CIPSTART=\"TCP\",\"google.com\",80",3000,DEBUG);
     sendData("AT+CIPSEND=80",1000,DEBUG);
     sendData("GET http://www.google.com HTTP/1.0\r\n",100,DEBUG);
     */
}

void SendTextMessage()
{ 
  sendData("",2000,DEBUG);
  sendData("AT+CMGF=1",2000,DEBUG);//Because we want to send the SMS in text mode
  delay(100);
  sendData("AT+CMGS="+target_phone,2000,DEBUG);//send sms message, be careful need to add a country code before the cellphone number
  delay(100);
  sendData("GSM test 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);
}

void DialVoiceCall()
{
   sendData("AT+SNFS=0",5000,DEBUG);
   delay(100);
   sendData("ATD"+target_phone,5000,DEBUG);// "ATD+86137xxxxxxxx"dial the number
   delay(100);
}


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

void httpRec(const int timeout){
    String response = "";    
    long int time = millis();
    while( (time+timeout) > millis())
    {
      while(Serial1.available())
      {       
        char c = Serial1.read(); 
        response+=c;
      }  
    }    
    Serial.print(response); 
}

/*
 * Created by Keen
 * Modified by Keen 
 * Date: 15/07/2017
 * Please note:
 * 1.You need to change the "target_phone". 
 * 2.Lithium batteries must be used.
 * 3.The GPS and GSM antenna must be used.
 * Please open your "Serial Monitor" and you will get the debug information. 
 */
#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 = "+861************6"; // Your phone number,be careful need to add a country code before the cellphone number

String GPS_position="";
int GPS_position_count=0;

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);    //If you delete '//', you will get the all GPS information
     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);
            sendData("AT+GPS=1",1000,DEBUG); 
           }

         }
       }
       GPS_position="";
       conta=0;                    // Reset the buffer
       for (int i=0;i<300;i++){    //  
       linea[i]=' ';             
       }                
     }
   }  
   }
}

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);
    }    
}