DFD and Code

Here is the process flow of the Xtreme Defender

And here is the full code of this project (arduino sketch)

/*
 * Copyright (C) 2016 Samarth Gupta
 * Project Title: Xtreme Defender - Home Security System
 * Author: Samarth Gupta
 * Started Date: 15/4/16
 * Project Sponsored by - www.samteck.net
 * Version: 1.0
 */

/////////////////////////////////////////////////////////////////////////
#include<LiquidCrystal.h>
#include<Wire.h>
#include<Password.h>
#include<Keypad.h>
#include<Servo.h>
#include "RTClib.h"

//-----Declaring Global Variables-----//

//Keypad
Password password = Password("1234"); //Delared the password for system

const byte ROWS = 4; //Delared the number of rows in keypad
const byte COLS = 4; //Delared the number of colums in keypad

char keys[ROWS][COLS] = { {'1','2','3','A'},  //telling the arduino about the keys of keypad
                          {'4','5','6','B'},
                          {'7','8','9','C'},
                          {'*','0','#','D'} };

byte rowPins[ROWS] = {46,47,48,49}; //Rows pins connection to Arduino
byte colPins[COLS] = {50,51,52,53}; //Columns pins connection to Arduino

Keypad keypad = Keypad(makeKeymap(keys),rowPins,colPins,ROWS,COLS); //Making the keypad object

//Servo
Servo myservo;
int pos = 90; //initial position of servo at Right angle

//Real time Clock
RTC_DS1307 RTC;

//LCD Display
LiquidCrystal lcd(7,8,9,10,11,12); //Assigning the various pins of LCD to Arduino
int passwd_pos = 15;  //password position on the LCD

//Notifications LED
int redPin = 29;  //connect red pin of LED to pin no. 29 on arduino
int bluePin = 31; //connect blue pin of LED to pin no. 31 on arduino
int ledDelay = 50;//delay the led time by 50ms

//Staus Light
int greenLED = 37;  //connect green LED to pin no. 37 on arduino
int redLED = 38;    //connect red LED to pin no. 38 on arduino

//PIR Sensors
int pirPin1 = 39; //connect pir 1 to pin no 39 in arduino
int pirPin2 = 34; //connect pir 2 to pin no 34 in arduino

//Door Switches
int door1 = 41; //door 1 switch is connected to pin no 41 on arduino
int door2 = 42; //door 2 switch is connected to pin no 42 on arduino

//Speaker
int speakerPin = 35;  //alaram speaker is connected to pin no 35;

//Blue anbient light Relay connection
int relay = 4;  //Connect pin 4 of arduino to realy board

//Other variables
int alarmStatus = 0;  //setting these variables to 0
int zone = 0;
int alarmActive = 0;

//-----Beginning setup Function-----//

void setup(){
  Serial.begin(9600); //send data to computer via serial communication at 9600bps
  lcd.begin(20, 4);   //Telling the size of the LCD by samteck
  Wire.begin();       //Setting up I2C communication with Arduino
  RTC.begin();        //Start getting time form RTC module
  RTC.adjust(DateTime(__DATE__,__TIME__));//Set the time on RTC to compile time

  myservo.attach(2);  // attaches the servo on pin 2 to the servo object
  myservo.write(pos);

  //setting up pin  modes of LED Lights
  pinMode(redPin,OUTPUT);
  pinMode(bluePin,OUTPUT);
  pinMode(redLED,OUTPUT);
  pinMode(greenLED,OUTPUT);

  pinMode(speakerPin,OUTPUT);

  pinMode(relay,OUTPUT);

  //setting pinmode of sensors and switches
  pinMode(pirPin1,INPUT);  //Bedroom 1
  pinMode(pirPin2,INPUT);  //Garage
  pinMode(door1,INPUT); //Front door
  pinMode(door2,INPUT); //Back door

  digitalWrite(redLED,LOW);
  digitalWrite(greenLED,HIGH);
  digitalWrite(speakerPin,LOW);

  digitalWrite(relay,HIGH);

  digitalWrite(pirPin1,LOW);
  digitalWrite(pirPin2,LOW);

  calibration();    //call the calibration function to PIR initialization
  
  displayCodeEntryScreen(); //display the starting screen

  keypad.addEventListener(keypadEvent); //add an event listener for this keypad
  }

//-----Beginning loop Function-----//

void loop(){
  DateTime now = RTC.now();   //take current time and date from RTC module

  digitalWrite(redPin,HIGH);
  digitalWrite(bluePin,HIGH);

  //Setting the date and time
  lcd.setCursor(0,1);
  lcd.print(now.day(),DEC);
  lcd.print('/');
  lcd.print(now.month(),DEC);
  lcd.print('/');
  lcd.print(now.year(),DEC);
  lcd.print(' ');

  lcd.setCursor(13,1);
  lcd.print(now.hour(),DEC);
  lcd.print(':');
  lcd.setCursor(16,1);
  lcd.print(now.minute(),DEC);

  keypad.getKey();    //get key press from keypad

  if(alarmActive==1){
    if(digitalRead(pirPin1)==HIGH)
    {
      zone=0;
      alarmTriggered();
    }
    if(digitalRead(door2)==LOW)
    {
      zone=1;
      alarmTriggered();
    }
    if(digitalRead(door1)==LOW)
    {
      zone=2;
      alarmTriggered();
    }
    if(digitalRead(pirPin2)==HIGH)
    {
      zone=3;
      alarmTriggered();
    }
  }
}
  
//////////////  Here comes Functions  ////////////////

void keypadEvent(KeypadEvent eKey){
  switch(keypad.getState()){
      case PRESSED:
        if(passwd_pos - 15 >=5){
            return;
        }
        lcd.setCursor((passwd_pos++),0);
        switch(eKey){
          case '#':
            passwd_pos=15;
            checkPassword();
            break;
            
          case '*':
            password.reset();
            passwd_pos=15;
            break;

           default:
            password.append(eKey);
            lcd.print("*");
         }  
  }
}

void checkPassword(){     //to check if correct pin is entered or not
  if(password.evaluate()){
    if(alarmActive==0 && alarmStatus==0){
      activate();
      }
    else if(alarmActive==1 || alarmStatus==1){
      deactivate();
      }  
  }
    else{
      invalidCode();
      }
}

void activate(){ //to activate the system if correct pin is entered
  if((digitalRead(door1)==HIGH) && (digitalRead(door2)==HIGH)){
    digitalWrite(redLED,HIGH);
    digitalWrite(greenLED,LOW);
    digitalWrite(2,HIGH);
    lcd.setCursor(0,0);
    lcd.print("SYSTEM ACTIVE !!!!!");
    alarmActive=1;
    password.reset();
    delay(2000);
    }
   else{
    if(digitalRead(door1)==LOW && digitalRead(door2)==LOW){
    lcd.clear();
    lcd.setCursor(0,1);
    lcd.print(" BOTH Door Open ");
    lcd.setCursor(0,2);
    lcd.print("Close & Reactivate");
    }
    else if(digitalRead(door1)==LOW){
    lcd.clear();
    lcd.setCursor(0,1);
    lcd.print(" FRONT Door Open ");
    lcd.setCursor(0,2);
    lcd.print("Close & Reactivate");
    }
    else{
    lcd.clear();
    lcd.setCursor(0,1);
    lcd.print(" BACK Door Open ");
    lcd.setCursor(0,2);
    lcd.print("Close & Reactivate");
    }
    delay(2000);
      deactivate();   //if door are open then system will not activate
    } 
}

void deactivate(){    // to deacivate the system
  alarmStatus=0;
  digitalWrite(redLED,LOW);
  digitalWrite(greenLED,HIGH);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print(" SYSTEM DEACTIVATED!");
  digitalWrite(speakerPin,LOW);
  alarmActive=0;
  password.reset();
  delay(5000);
  digitalWrite(relay,HIGH);

  displayCodeEntryScreen();   //basically restarts the system
  }

void displayCodeEntryScreen(){    //show up the first screen on the boot
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Enter PIN:");
  lcd.setCursor(0,2);
  lcd.print("Home Security System");
  lcd.setCursor(0,3);
  lcd.print("By Samarth,-SamTeck-");
}

void invalidCode(){  //display when invalid code is entered
  password.reset();
  lcd.clear();
  lcd.setCursor(1,0);
  lcd.print("INVALID CODE! LOL!");
  lcd.setCursor(5,2);
  lcd.print("TRY AGAIN!");
  digitalWrite(greenLED,LOW);
  digitalWrite(redLED,HIGH);
  delay(2000);
  digitalWrite(redLED,LOW);
  delay(1000);
  displayCodeEntryScreen();
}

void alarmTriggered(){    //this function is called whenever input is received on any of the sensor
  int expected_pos;
  int incr;
  digitalWrite(speakerPin,HIGH);
  digitalWrite(relay,LOW);
  digitalWrite(redPin,HIGH);
  digitalWrite(bluePin,LOW);

  password.reset();
  alarmStatus=1;
  lcd.clear();
  lcd.setCursor(0,2);
  lcd.print("  SYSTEM TRIGGERED  ");
  lcd.setCursor(0,4);
  if(zone==0)
  {
    expected_pos=95;
    lcd.print("Motion in Bedroom 1 ");
    delay(1000);  
  }
  else if(zone==1)
  {
    expected_pos=60;
    lcd.print("  Back Door Open");
    delay(1000);  
  }
  else if(zone==2)
  {
    expected_pos=70;
    lcd.print("  Front Door Open");
    delay(1000);  
  }
  else if(zone==3)
  {
    expected_pos=10;
    lcd.print(" Motion in Garage ");
    delay(1000);  
  }

  //setting up position for Servo motor

  if(expected_pos > pos)
    incr=1;
  else
    incr=-1;

  for(pos=pos; pos != expected_pos; pos += incr)
  {
    myservo.write(pos);
    delay(5);  
  }

  StrokeLight();
}

void StrokeLight(){                    //Stroke LED Lights
    digitalWrite(redPin, HIGH);        // turn the red light on
    delay(ledDelay); // wait 50 ms
    digitalWrite(redPin, LOW);         // turn the red light off
    delay(ledDelay); // wait 50 ms
    digitalWrite(redPin, HIGH);        // turn the red light on
    delay(ledDelay); // wait 50 ms
    digitalWrite(redPin, LOW);         // turn the red light off
    delay(ledDelay); // wait 50 ms
    digitalWrite(redPin, HIGH);        // turn the red light on
    delay(ledDelay); // wait 50 ms
    digitalWrite(redPin, LOW);         // turn the red light off
    delay(ledDelay); // wait 50 ms
    delay(10); // delay midpoint by 100ms
    digitalWrite(bluePin, HIGH);       // turn the blue light on
    delay(ledDelay); // wait 50 ms
    digitalWrite(bluePin, LOW);        // turn the blue light off
    delay(ledDelay); // wait 50 ms
    digitalWrite(bluePin, HIGH);       // turn the blue light on
    delay(ledDelay); // wait 50 ms
    digitalWrite(bluePin, LOW);        // turn the blue light off
    delay(ledDelay); // wait 50 ms
    digitalWrite(bluePin, HIGH);       // turn the blue light on
    delay(ledDelay); // wait 50 ms
    digitalWrite(bluePin, LOW);        // turn the blue light off
    delay(ledDelay); // wait 50 ms
    }          

void calibration(){
  int i=0;
  lcd.clear();
  lcd.setCursor(5,0);
  lcd.print("WELCOME TO");
  lcd.setCursor(0,1);
  lcd.print("Xtreme Defender 666");
  lcd.setCursor(0,2);
  lcd.print(" A Fully Automated ");
  lcd.setCursor(0,3);
  lcd.print("Home Security System");  
  delay(5000);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("LOADING BOOTSTRAP");
  lcd.setCursor(0,1);
  for(i=0;i<20;i++){
      lcd.print(".");
      delay(150);
  }
  lcd.setCursor(0,2);
  lcd.print("LOADING NCC. FILES");
  lcd.setCursor(0,3);
  for(i=0;i<20;i++){
      lcd.print(".");
      delay(100);
  }
  delay(1000);
  
  for(i=0;i<=100;i++){
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Initializing .......");
    lcd.setCursor(0,1);
    lcd.print("PIR Sensors");
    lcd.setCursor(0,2);
    lcd.print(i);
    lcd.print("%");
    delay(50);
  }
  lcd.setCursor(8,2);
  lcd.print("--OK DONE--");
  delay(500);
  lcd.setCursor(0,3);
  lcd.print("LOADING START SCREEN");
  delay(1500);
}