#include <Servo.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>

#define trigPin 12
#define echoPin 11
LiquidCrystal_I2C lcd(0x27 ,16,2);

Servo servo;

int sound = 250;
void setup() {
Serial.begin (9600);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
servo.attach(9);
lcd.init();                      // initialize the lcd 
  // Print a message to the LCD.
  lcd.backlight();
  lcd.setCursor(2,0);
    lcd.print("KUNCI PINTU");
    delay (1000);
    lcd.setCursor(2,1);
    lcd.print("DENGAN RFID");
    delay(1000);
    lcd.clear();
      lcd.setCursor(0,0);
    lcd.print("DIBUAT OLEH:");
        lcd.setCursor(0,1);
    lcd.print("KELOMPOK 2");
}

void loop() {
long duration, distance;
digitalWrite(trigPin, LOW);
delayMicroseconds(2);

digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;

if (distance < 10) {
//Serial.println("the distance is less than 10");
servo.write(180);
delay(1500);
lcd.init();                      // initialize the lcd 
  // Print a message to the LCD.
  lcd.backlight();
  lcd.setCursor(2,0);
    lcd.print("PINTU");
    //delay (1000);
    lcd.setCursor(2,1);
    lcd.print("TERBUKA");
}

else {
servo.write(0);
}

if (distance > 60 || distance <= 0){
//Serial.println("The distance is more than 60");
lcd.init();                      // initialize the lcd 
  // Print a message to the LCD.
  lcd.backlight();
  lcd.setCursor(2,0);
    lcd.print("PINTU");
    //delay (1000);
    lcd.setCursor(2,1);
    lcd.print("TERKUNCI");
}

else {
//Serial.print(distance);
//Serial.println(" cm");
}

delay(500);

}