#include <LiquidCrystal_I2C.h>
// jeremiah laman code for kepad 4x4
#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

#include <Keypad.h>
String pindotin;

String sagot = "BCAD";
char pindot;

int led=A0;
int buzz=A1;

const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  Serial.begin(9600);
    lcd.init();
  lcd.backlight();
   lcd.setCursor(2, 0);
   lcd.print("welcome master");
   lcd.setCursor(5, 1);
      lcd.print("1Y4M");
      delay(2000);
      lcd.clear();
       lcd.setCursor(0, 1);
  lcd.print("press # to enter");
  lcd.setCursor(0, 0);
  lcd.print("press * to clear");
 delay(2000);
      lcd.clear();


}

void loop() {
  display();

 readKeypad();
    
  if (pindot == '#') {
   
    if (pindotin == sagot) {
       lcd.clear();
      lcd.setCursor(0, 1);
      lcd.print("Access Granted");
      delay(1000);
      digitalWrite(A0,HIGH);
        digitalWrite(A1,LOW);
      
     
    } else {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Try Again");
      lcd.setCursor(0, 1);
      lcd.print("Access Denied");
      delay(2000);
       digitalWrite(A0,LOW);
        digitalWrite(A1,HIGH);
       delay(100);
      
    }
  } if (pindot == '*') {
    pindotin = "";
    lcd.clear();
  }
   
 
}
void readKeypad() {

 
  pindot = keypad.getKey(); //deteksi penekanan keypad
  if (pindot != '#') {
  
    String congtv = String(pindot);
    pindotin += congtv;

    
  }}
  void display(){
lcd.setCursor(0, 0);
  lcd.print("password:");
   lcd.print(pindotin);
   delay(50);
        lcd.setCursor(0, 1);
  lcd.print("#-Enter||*-clear");
 
  }