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

LiquidCrystal_I2C lcd(0x27,20,4);

const uint8_t ROWS = 4;
const uint8_t COLS = 4;
int led[3]={10,11,12};
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 Tombol = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  for(int i=0;i<3;i++){
    pinMode(led[i], OUTPUT);
  }
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("lat LCD & Keypad");
  delay(2000);
  
}

void loop() {
  char data = Tombol.getKey();
  
  if (data == '1') { 
    digitalWrite(led[0], HIGH);//Menyalakan Led hijau
    lcd.clear(); //menghapus layar
    lcd.setCursor(0,0); // set posisi awal huruf
    lcd.print("Lampu Hijau ON"); //tampilkan teks 
  }
  if (data == '2') { 
    digitalWrite(led[1], HIGH);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Lampu Merah ON");
  }
  if (data == '3') { 
    digitalWrite(led[2], HIGH);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Lampu Biru ON");
  }
  if (data == 'C') { 
    for(int k=0;k<3;k++){
    digitalWrite(led[k], LOW);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Semua Lampu OFF");
    }
  }


}