#include <LiquidCrystal_I2C_Hangul.h>



 LiquidCrystal_I2C_Hangul lcd(0x27, 16, 2);
unsigned long waktuAwal, waktuSekarang, dataStopwatch;
bool hitung = false;



void setup() {
  // Inisialisasi pin tombol sebagai input
  pinMode(2, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);
  pinMode(4, INPUT_PULLUP);
  pinMode(5, INPUT_PULLUP);
  pinMode(6, OUTPUT);

  lcd.init();
  lcd.backlight();
  lcd.setCursor(2,0);
  lcd.print("Tekan Tombol");
  lcd.setCursor(5,1);
  lcd.print("START");

}

void loop() {
  // Baca status tombol 
  if(digitalRead(2)==0){
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("    READY !   ");
    delay(5000);
    waktuAwal = millis();
    hitung = true;
    digitalWrite(6, HIGH);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("    PUKUL !    ");  
  }
   else if(digitalRead(5)==0){
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("    READY !   ");
    waktuAwal = millis();
    hitung = true;
    digitalWrite(6, HIGH);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("    PUKUL !    "); 
  
  }

  



  else if(digitalRead(3)==0){
    hitung = false;
    digitalWrite(6, LOW);
    lcd.setCursor(2,0);
    lcd.print(" TIMER STOP ");
  }

  else if(digitalRead(4)==0){
   hitung = false;
   lcd.setCursor(0,0);
   lcd.print ("Reset Stopwatch");
   lcd.setCursor(0,3);
   lcd.print("    0:0:0:0     ");
  delay(1000);
    lcd.clear();
   lcd.setCursor(2,0);
   lcd.print("Tekan Tombol");
   lcd.setCursor(5,1);
   lcd.print("START");
  }
  
  
if (hitung){
  waktuSekarang = millis();
  dataStopwatch = waktuSekarang - waktuAwal;
  float jam, menit, detik, milidetik;
  unsigned long over;

  jam = int(dataStopwatch / 3600000);
  over = dataStopwatch % 3600000;
  menit =int(over / 60000);
  over = over % 60000;
  detik = int(over / 1000);
  milidetik = over % 1000;
  lcd.setCursor(2, 1);
  lcd.print(jam,0);
  lcd.print(" :");
  lcd.print(menit,0);
  lcd.print(" :");
  lcd.print(detik,0);
  lcd.print(" :");
  lcd.print(milidetik,0);
  lcd.print("  ");
  }
  
}