#include <Wire.h>
#include <Servo.h>
#include <DHT.h>
#include <IRremote.h>
#include <Keypad.h>
#include <NewPing.h>
#include <LiquidCrystal_I2C.h>
#define PIN_RECEIVER 6
IRrecv receiver(PIN_RECEIVER);

const int s1Pin = 11; 
const int s2Pin = 10; 
const int s3Pin = 9; 
Servo servo1;
Servo servo2;
Servo servo3; 

const int pass_Length = 8;
char password[pass_Length + 1] = "12345678"; 
char enteredPassword[pass_Length + 1];
int pass_Index = 0;

const byte ROWS = 4; // Number of rows on the keypad
const byte COLS = 4; // Number of columns on the keypad
char keys[ROWS][COLS] = {
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};
byte rowPins[ROWS] = {8,7,5,4}; 
byte colPins[COLS] = {A0,A1,A2,A3}; 
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

LiquidCrystal_I2C lcd(0x27, 20, 4);

const int triggerPin = 2;
const int echoPin = 3; 
const int minDistance = 10; 
const int maxDistance = 300;
NewPing sonar(triggerPin, echoPin, maxDistance);

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

void setup() {
servo1.attach(s1Pin); 
servo2.attach(s2Pin); 
servo3.attach(s3Pin); 
servo1.write(0); 
servo2.write(0); 
servo3.write(0);
lcd.begin(16, 2); // Initialize the LCD screen
lcd.print("Enter password:"); // Display initial message
Serial.begin(9600); 
receiver.enableIRIn();
}

void loop() {
DHT_22();
Servo();

char key = keypad.getKey();
if (key) {
if (key == '#') {
if (pass_Index >= pass_Length) {
enteredPassword[pass_Index] = '\0';
checkPass();
}
pass_Index = 0;
} 
else if (pass_Index < pass_Length) {
enteredPassword[pass_Index] = key;
pass_Index++;
lcd.setCursor(0, 0);
lcd.print("                      ");
lcd.setCursor(0, 0);
lcd.print("*"); 
}
}
delay(50); 
int distance = sonar.ping_cm(); 
if (distance > 0 && distance <= minDistance) {
KitchenDoor();
}
}

///
void DHT_22(){
float Temperature = dht.readTemperature();
float Humidity = dht.readHumidity();

lcd.setCursor(0, 2);
lcd.print("Humidity: ");
lcd.print(Humidity);

lcd.setCursor(0, 3);
lcd.print("Temperature: ");
lcd.print(Temperature);
}
///
void checkPass() {
if (strcmp(enteredPassword, password) == 0) {
MainDoor();
} else {
lcd.setCursor(0, 0);
lcd.print("error"); 

}

for (int i = 0; i < pass_Length; i++) {
enteredPassword[i] = '\0';
}
}
///
void Servo(){
  if (receiver.decode()) {
  switch (receiver.decodedIRData.command) {
      case 144: 
        servo3.write(servo3.read() + 100);
        lcd.setCursor(0, 0);
        lcd.print("                    ");
        lcd.setCursor(0, 0);
        lcd.print("open the window");
        break;
      case 224:
        servo3.write(servo3.read() - 100);
         lcd.setCursor(0, 0);
        lcd.print("                    ");
        lcd.setCursor(0, 0);
         lcd.print("closed the window");
        break;
  }
  }
  receiver.resume();  
  }
///
void KitchenDoor() {
  lcd.setCursor(0, 0);
  lcd.print("                      ");
  lcd.setCursor(0, 1);
  lcd.print("                        ");
  lcd.setCursor(0, 2);
  lcd.print("                        ");
  lcd.setCursor(0, 0);
  lcd.print("Kitchen door opened!");
  servo2.write(90); 
  delay(2000); 
  servo2.write(0);
}
///
void MainDoor() {
  lcd.setCursor(0, 1);
  lcd.print("                      ");
  lcd.setCursor(0, 2);
  lcd.print("                          ");
  lcd.setCursor(0, 1);
  lcd.print("Main door opened!");
  servo1.write(90); 
  delay(2000); 
  servo1.write(0); 
}