#include <Servo.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <Keypad.h>

int servoPin = 6; 
int Sensorpin =2;
int State = LOW;  
int value = 0;
Servo myservo;
// Password Length
const int Password_Length = 4;
// Character to hold password input
String Data;
// Password
String pass= "ABCD";
// Counter for character entries
byte data_count = 0;

// Character to hold key input
char customKey;


// Constants for row and column sizes
const byte ROWS = 4;
const byte COLS = 4;

// Array to represent keys on keypad
char keymap[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

// Connections to Arduino
byte rowPins[ROWS] = {9, 8, 7, 6};
byte colPins[COLS] = {5, 4, 3, 1};

// Create keypad object
Keypad customKeypad = Keypad(makeKeymap(keymap), rowPins, colPins, ROWS, COLS);


LiquidCrystal_I2C lcd(0x27, 16, 2);

#define DHTPIN 13
#define DHTTYPE DHT22 
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  // Setup LCD with backlight and initialize
  lcd.init();
  lcd.backlight();
  myservo.attach(11);
  pinMode(servoPin, OUTPUT); 
  pinMode(Sensorpin,INPUT);
}

void loop() {

  // Initialize LCD and print
  lcd.setCursor(0, 0);
  lcd.print("Enter the Pass:");
  // Look for keypress
  customKey = customKeypad.getKey();
  if (customKey) {
    // Enter keypress into array and increment counter
    Data += customKey;
    lcd.setCursor(data_count, 1);
    lcd.print(Data[data_count]);
    data_count++;
  }

  // See if we have reached the password length
  if (data_count == Password_Length) {
    lcd.clear();

    if (Data == pass) {
    float Temperature = dht.readTemperature();
    float Humidity = dht.readHumidity();

    lcd.setCursor(0, 0);
    lcd.print("Humidity: ");
    lcd.print(Humidity);

    lcd.setCursor(0, 1);
    lcd.print("Temp: ");
    lcd.print(Temperature);
    delay(5000);
    lcd.clear();
 }
  else {
      // Incorrect Password
      lcd.print("Wrong the pass");
      delay(500);
      lcd.clear();
      lcd.print("Enter the password:");
    }

    // Clear data and LCD display
  lcd.clear();
 clearData();
  }
  value = digitalRead(Sensorpin);  // 
  if (value == HIGH) {            // check if the input is HIGH
   myservo.write(90);
    if (State == LOW) {
      State = HIGH;
    }
  } else {
     myservo.write(0);
    if (State == HIGH) {
      State = LOW;
    }
  }
}


void clearData() {
  //Reset data_count
  data_count = 0;
  //Reset Data
  Data ="";
}