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Perancangan Posisi kendaraan dengan arduino via GPS
SIM808 Module
 
1Arduino UNO OR Arduino Mega 
1Arduino cable 
19V power supply 
1GPS antenna 
1GSM antenna 

SOFTWARE
1Arduino IDE
1SIM808 library

Gambar koneksi Arduino dengan Sim 808
  • Rx to pin 10
  • Tx to pin 11
  • hubungkan SIM808 dengan 9V adapter
  • Power untuk Arduino via USB cable atau 9V charger
//Program Utama
#include <DFRobot_sim808.h>
#include <SoftwareSerial.h>
#define MESSAGE_LENGTH 160
char message[MESSAGE_LENGTH];
int messageIndex = 0;
char MESSAGE[300];
char lat[12];
char lon[12];
char wspeed[12];

char phone[16];
char datetime[24];

#define PIN_TX    10
#define PIN_RX    11
SoftwareSerial mySerial(PIN_TX,PIN_RX);
DFRobot_SIM808 sim808(&mySerial);//Connect RX,TX

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

  //******** inisialisasi sim808 module *************
  while(!sim808.init())
  {
      Serial.print("Sim808 init error\r\n");
      delay(1000);
  }
  delay(3000);

  if( sim808.attachGPS())
      Serial.println("Open the GPS power success");
  else 
      Serial.println("Open the GPS power failure");
      
  Serial.println("Init Success, please send SMS message to me!");
}

void loop()
{
  //*********** Detecting unread SMS ************************
   messageIndex = sim808.isSMSunread();

   //*********** At least, there is one UNREAD SMS ***********
   if (messageIndex > 0)
   { 
      Serial.print("messageIndex: ");
      Serial.println(messageIndex);
      
      sim808.readSMS(messageIndex, message, MESSAGE_LENGTH, phone, datetime);
                 
      //***********In order not to full SIM Memory, is better to delete it**********
      sim808.deleteSMS(messageIndex);
      Serial.print("From number: ");
      Serial.println(phone);  
      Serial.print("Datetime: ");
      Serial.println(datetime);        
      Serial.print("Recieved Message: ");
      Serial.println(message); 

    while(!sim808.getGPS())
    {
      
    }

   
      Serial.print(sim808.GPSdata.year);
      Serial.print("/");
      Serial.print(sim808.GPSdata.month);
      Serial.print("/");
      Serial.print(sim808.GPSdata.day);
      Serial.print(" ");
      Serial.print(sim808.GPSdata.hour);
      Serial.print(":");
      Serial.print(sim808.GPSdata.minute);
      Serial.print(":");
      Serial.print(sim808.GPSdata.second);
      Serial.print(":");
      Serial.println(sim808.GPSdata.centisecond);
      Serial.print("latitude :");
      Serial.println(sim808.GPSdata.lat);
      Serial.print("longitude :");
      Serial.println(sim808.GPSdata.lon);
      Serial.print("speed_kph :");
      Serial.println(sim808.GPSdata.speed_kph);
      Serial.print("heading :");
      Serial.println(sim808.GPSdata.heading);
      Serial.println();
  
      float la = sim808.GPSdata.lat;
      float lo = sim808.GPSdata.lon;
      float ws = sim808.GPSdata.speed_kph;
  
      dtostrf(la, 6, 2, lat); //put float value of la into char array of lat. 6 = number of digits before decimal sign. 2 = number of digits after the decimal sign.
      dtostrf(lo, 6, 2, lon); //put float value of lo into char array of lon
      dtostrf(ws, 6, 2, wspeed);  //put float value of ws into char array of wspeed
    
      sprintf(MESSAGE, "Latitude : %s\nLongitude : %s\nWind Speed : %s kph\nMy Module Is Working. Mewan Indula Pathirage. Try With This Link.\nhttp://www.latlong.net/Show-Latitude-Longitude.html\nhttp://maps.google.com/maps?q=%s,%s\n", lat, lon, wspeed, lat, lon);
      
       Serial.println("Sim808 init success");
       Serial.println("Start to send message ...");
       Serial.println(MESSAGE);
       Serial.println(phone);
       sim808.sendSMS(phone,MESSAGE);
      //************* Turn off the GPS power ************
      sim808.detachGPS();
      
   }
}

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