GPS based tracking and location sending using SMS

selfProtect.ino

// written by stupid@arnob
#include <SoftwareSerial.h>
#include <TinyGPS.h>

SoftwareSerial SIM900(2, 3); // RX, TX

TinyGPS gps;
SoftwareSerial ss(6, 7);// RX, TX



float flat, flon;
bool newData = false;
unsigned long chars;
unsigned short sentences, failed;
unsigned long age;

int button = 11;
int activeLED = 12;

void setup() {
  Serial.begin(9600);
  
  SIM900.begin(9600);
  SIM900.print("AT+CMGF=1\r");
  delay(100);
  SIM900.print("AT+CNMI=2,2,0,0,0\r");
  delay(100);
   
  ss.begin(9600);
  Serial.print("Simple TinyGPS library v. ");
  Serial.println(TinyGPS::library_version());
  pinMode(button, INPUT);
  pinMode(activeLED, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  String a = "Here Is the Location";
  String b = "Lat";
  String c = String(flat, 6);
  String d = "Long";
  String e = String(flon, 6);
  String msg = a + b + c + d + e;

  if (digitalRead(button)) {
    Serial.println("Button Active");
    digitalWrite(activeLED, HIGH);
    SendMessage(msg);
    delay(1000);

  } else {
    digitalWrite(activeLED, LOW);

    // For one second we parse GPS data and report some key values
    for (unsigned long start = millis(); millis() - start < 1000;)
    {
      while (ss.available())
      {
        char c = ss.read();
        // Serial.write(c); // uncomment this line if you want to see the GPS data flowing
        if (gps.encode(c)) // Did a new valid sentence come in?
          newData = true;
      }
    }

    if (newData)
    {

      gps.f_get_position(&flat, &flon, &age);
      Serial.print("LAT=");
      Serial.print(flat == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flat, 6);
      Serial.print(" LON=");
      Serial.print(flon == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flon, 6);
      Serial.print(" SAT=");
      Serial.print(gps.satellites() == TinyGPS::GPS_INVALID_SATELLITES ? 0 : gps.satellites());
      Serial.print(" PREC=");
      Serial.print(gps.hdop() == TinyGPS::GPS_INVALID_HDOP ? 0 : gps.hdop());
    }

    gps.stats(&chars, &sentences, &failed);
    Serial.print(" CHARS=");
    Serial.print(chars);
    Serial.print(" SENTENCES=");
    Serial.print(sentences);
    Serial.print(" CSUM ERR=");
    Serial.println(failed);
    if (chars == 0)
      Serial.println("** No characters received from GPS: check wiring **");

  }
}

// send message
void SendMessage(String msg)
{
  SIM900.println("AT+CMGF=1");    //Sets the GSM Module in Text Mode
  delay(1000);  // Delay of 1000 milli seconds or 1 second
  SIM900.println("AT+CMGS=\"+8801748286562\"\r"); // Replace x with mobile number
  delay(1000);
  SIM900.println(msg);// The SMS text you want to send
  delay(100);
  SIM900.println((char)26);// ASCII code of CTRL+Z
  delay(1000);
}