// Include required libraries
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#include <SPI.h> 
#include <EEPROM.h>
// Create instances
LiquidCrystal_I2C lcd(0x27, 16, 2); // LCD 
const int buzzer = 2;// the pin that the buzzer is atteched to
const int pir = 12; // the pin that the sensor is atteched to
int state = LOW; // by default, no motion detected
int val = 0;  // variable to store the sensor status (value)
#define AO_PIN A0  // the pin that the ldr is atteched to
const int ledone = 3; // led1 pin
const int ledtwo = 4; // led2 pin
int light = 0; // Variable to store light intensity 
char initial_passwordA[4] = {'1', '6', '5', '8'};  // Variable to store initial password
char initial_passwordB[4] = {'2', '0', '9', '5'}; 
char passwordA[4];   // Variable to store users password
char passwordB[4];   // Variable to store users password
char key_pressed = 0; // Variable to store incoming keys
int i = 0;  // Variable used for counter
// defining how many rows and columns our keypad have
const byte rows = 4;
const byte columns = 4;
// Keypad pin map
char hexaKeys[rows][columns] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};
// Initializing pins for keypad
byte row_pins[rows] = {8, 7, 6, 5};
byte column_pins[columns] = {A3, A2, A1};
// Create instance for keypad
Keypad keypad_key = Keypad( makeKeymap(hexaKeys), row_pins, column_pins, rows, columns);



void setup() 
{
  pinMode(ledone, OUTPUT);
  pinMode(ledtwo, OUTPUT);
  pinMode(buzzer, OUTPUT);      // initalize buzzer as an output
  pinMode(pir, INPUT);    // initialize sensor as an input
  Serial.begin(9600); // initialize serial communication
  lcd.begin(0x27, 16, 2);   // LCD screen
  lcd.backlight();
 // lcd.setCursor(0, 0);
  SPI.begin();  // Initialize SPI bus
   lcd.clear(); 
}

void loop()
{
  light = analogRead(AO_PIN); // read ldr value
  val = digitalRead(pir); // read sensor value
  if (val == HIGH) // check if the sensor is HIGH
   {        
    digitalWrite(buzzer, HIGH); // turn LED ON
    delay(100); // delay 100 milliseconds 
    
    if (state == LOW) 
    {
      //lcd.clear();
      state = HIGH;       // update variable state to HIGH
      lcd.setCursor(0, 1);
      lcd.print("Motion detected!"); // print motion detection
      delay(3000); 
    }
  } 
  else 
  {
      digitalWrite(buzzer, LOW); // turn LED OFF
      delay(200);  // delay 200 milliseconds 
      
      if (state == HIGH)
      {
        lcd.setCursor(0, 1);
        lcd.clear();
        state = LOW;       // update variable state to LOW
      }
  }
   if (light > 512)
   {
    //digitalWrite(ledone, HIGH);
    //digitalWrite(ledtwo, LOW);
    lcd.setCursor(0, 0);
    lcd.print("Enter Pass1_");
   }
   else
   {
   // digitalWrite(ledone, LOW);
    //digitalWrite(ledtwo, HIGH);
    lcd.setCursor(0, 0);
    lcd.print("Enter Pass2_");
    key_pressed = keypad_key.getKey(); // Storing keys
    if (key_pressed)
    {
      passwordB[i++] = key_pressed; // Storing in password variable
      lcd.print("#");
    }
    if (i == 4) // If 4 keys are completed
    {
     // delay(200);
      if (!(strncmp(passwordB, initial_passwordB, 4))) // If password is matched
      {
        lcd.setCursor(0, 0);
        lcd.clear();
        lcd.print("Pass Accepted");
      //  sg90.write(90); // Door Opened
        digitalWrite(ledtwo, HIGH);
        delay(3000);
        digitalWrite(ledtwo, LOW);
        //sg90.write(0); // Door Closed
        lcd.clear();
        i = 0;
      }
      else    // If password is not matched
      {
        lcd.setCursor(0, 0);
        lcd.clear();
        lcd.print("Wrong Password");
       // digitalWrite(buzzerPin, HIGH);
        digitalWrite(ledone, HIGH);
        delay(3000);
      //  digitalWrite(buzzerPin, LOW);
        digitalWrite(ledone, LOW);
        lcd.clear();
        i = 0;
       // RFIDMode = true;  // Make RFID mode true
     }
    }
   }
}