#include <LiquidCrystal.h>
LiquidCrystal lcd(15, 2, 0, 4, 16, 17);

const int lampu_merah = 12;
const int lampu_hijau = 14;
const int buzzer = 13;
bool statusAbsen = false;

void setup() {
  Serial.begin(115200);
  pinMode(buzzer, OUTPUT);
  pinMode(lampu_merah, OUTPUT);
  pinMode(lampu_hijau, OUTPUT);
  lcd.begin(16, 2);
}

void loop() {
  // digitalWrite(lampu_merah, HIGH);
  // digitalWrite(lampu_hijau, LOW);
  // delay(500);
  // digitalWrite(lampu_merah, LOW);
  // digitalWrite(lampu_hijau, HIGH);
  // delay(500);

  // Bunyi buzzer ketika berhasil absen
  // tone(buzzer, 325, 100);
  // tone(buzzer, 250, 200);

  // Bunyi buzzer ketika gagal absen
  //tone(buzzer, 250, 700);
}