#include <Keypad.h>                //Library keypad
#include <LiquidCrystal_I2C.h>  
#include <Servo.h>
Servo Servo1;  //Library LCD I2C
LiquidCrystal_I2C lcd(0x27,16,2);   //Alamat I2C
 
const byte ROWS = 4;    //Jumlah baris keypad
const byte COLS = 4;    //Jumlah kolom keypad
 
char Keys[ROWS][COLS] = {   //Membuat array keypad
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] = {2, 3, 4, 5}; //Deklarasi pin keypad
byte colPins[COLS] = {6, 7, 8, 9};

 

Keypad customKeypad = Keypad( makeKeymap(Keys), rowPins, colPins, ROWS, COLS);    //Masukkan info keypad pada library

#define ledpin1 10
#define ledpin2 12       //LED pada pin D13
#define naik 177
#define turun 90
char customKey;         //Variabel penampung input keypad
int number = 0;         //Variabel penampung nilai angka
int password = 2018;    //Password


void setup() {
  lcd.init ();              //Mulai LCD
  lcd.setBacklight(HIGH);   //Nyalakan backlight
  pinMode(ledpin1,OUTPUT);
  pinMode(ledpin2,OUTPUT);
  Servo1.attach(11);  //Setting I/O
}

void loop() {
  lcd.setCursor(0,0);
  lcd.print("Input Password");      //Tampilan pada layar LCD
  customKey = customKeypad.getKey();    //Baca input keypad
  //------------Prosedur jika input berupa angka------------//
  switch(customKey){
    case '0' ... '9':
      lcd.setCursor(0,1);
      number = number * 10 + (customKey - '0');
      lcd.print(number);
    break;
    //------------Jika input '#' maka cek password------------//
    case 'A':
      if(number == password){           //Jika password benar, maka
        lcd.setCursor(0,1);
        lcd.print("bener kali");  //Tampilan LCD
        Servo1.write (naik);
        digitalWrite(ledpin1, HIGH);       //LED Menyala
        delay(2000);
        Servo1.write(turun);
        digitalWrite(ledpin1, LOW);
        number = 0;
        lcd.clear();
      }
      else{                             //Jika salah, maka
        lcd.setCursor(0,1);
        lcd.print("salah kali");  //Tampilan LCD
        Servo1.write (turun);
        digitalWrite(ledpin2, HIGH);       //LED Menyala
        delay(2000);
        Servo1.write(turun);
        digitalWrite(ledpin2, LOW);
        delay(2000);
        number = 0;
        lcd.clear();
      }
    break;
    //------------Jika input '*' maka hapus tampilan------------//

    case '*':
      number = 0;
      lcd.clear();
    break;
  }
}