//referensi: https://mechatrofice.com/arduino/arduino-counter-code-circuit-working
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);

#define buttonCounter 7
#define ledPin 12

int counterState=0;
int counterPresState=0;
int counterValue=0;

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(buttonCounter, INPUT_PULLUP);

  lcd.init();            
  lcd.backlight();
  lcd.setCursor(2,0);
  lcd.print("Counter UP");
  lcd.setCursor(6,1);
  lcd.print("00");
}

void loop() {
  //cek kondisi buttonCounter (ditekan/tidak)
  counterState = digitalRead(buttonCounter);

  //seleksi kondisi counterState
  if(counterState==LOW && counterPresState==0){
    counterValue++;

    lcd.setCursor(6,1);

    if(counterValue<10){
      lcd.print("0");
    }
    lcd.print(counterValue);
    
    delay(500);
    digitalWrite(buttonCounter, HIGH);
    counterPresState=1;

  }else if(counterState==HIGH){
    //Serial.println("Dilepas");
    counterPresState=0;
  }
  
}