#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2); 

#define playPause 4
#define stopReset 5

int statusplayPause;
int statusstopReset;
String statstatplayPauseText = "OFF"; 

int miliDetik=0;
int detik=0;
int menit=0;
int jam=0;

void setup() {
  lcd.init();
  lcd.backlight();

  pinMode(playPause, INPUT_PULLUP);
  pinMode(stopReset, INPUT_PULLUP);
  //memanggil function  stopwatchInit()
   stopwatchInit();

  Serial.begin(115200);
}

void loop() {
  statusplayPause = digitalRead(playPause);
  statusstopReset = digitalRead(stopReset);

   if (statusstopReset==LOW ) {
     stopwatchInit();
     stopwatchStopreset();
   }

  if (statusplayPause==LOW ){
      if (statstatplayPauseText=="OFF"){
          statstatplayPauseText="ON ";
      } else if (statstatplayPauseText=="ON "){
          statstatplayPauseText="OFF";
      }
      
      lcd.setCursor(13,0);
      lcd.println(statstatplayPauseText);
      delay(200);
  } 

  //cek status ON
  if(statstatplayPauseText=="ON "){
    stopwatchOn();
  }

}

void stopwatchInit() {
  lcd.setCursor(0,0);
  lcd.println("STOP WATCH : OFF");
  lcd.setCursor(2,1);
  lcd.println("00:00:00:00");
}

void stopwatchStopReset(){
    statstatplayPauseText="OFF";
    int miliDetik=0;
    int detik=0;
    int menit=0;
    int jam=0;

    stopwatchInit();
}
void stopwatchOn() {
  
    miliDetik++;    

   
    if(miliDetik>10){
        miliDetik=0;
        detik++;
      }

   
    lcd.setCursor(11,1);   

   
    if(miliDetik<10){
      lcd.print("0");
    }
    lcd.print(miliDetik);
    

    if(detik>3){
        detik=0;
        menit++;
      }

    
    lcd.setCursor(8,1);    

    
    if(detik<10){
      lcd.print("0");
    }
    lcd.print(detik); 


    if(menit>3){
        menit=0;
        jam++;
      }

   
    lcd.setCursor(5,1);    

    
    if(menit<10){
      lcd.print("0");
    }
    lcd.print(menit);  


    if(menit>3){
        jam=0;
      }
  lcd.setCursor(2,1);    

    if(jam<10){
      lcd.print("0");
    
    lcd.print(jam);        
    delay(100);
    }}

void stopwatchStopreset(){
  statstatplayPauseText="OFF";
   miliDetik=0;
 detik=0;
 menit=0;
jam=0;
}