//referensi: https://mechatrofice.com/arduino/arduino-counter-code-circuit-working
//referensi: https://wokwi.com/projects/328456046596063828
#include <LiquidCrystal_I2C.h>

// membuat object untuk LCD dengan nama lcd
LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display

// ESP32 pin GIOP12, yang terhubung ke led
//deklarasi variabel led ungu pada pin 14
#define LedJanda 14 
// mendefinisikan pin 12 untuk push button
#define button 12

//Tanggal dan waktu berfungsi menggunakan DS1307 RTC yang terhubung melalui I2C dan Wire library
#include "RTClib.h"
RTC_DS1307 rtc;

char weekDay[7][12] = {"Minggu", "Senin", "Selasa", "Rabu", "Kamis", "Jumat", "Sabtu" };

int counterState=0;
String counterValue = "idup";

void setup()
{
//anu lcd or initialize the lcd
  lcd.init(); 
  // Print a message to the LCD.
  lcd.backlight();
  lcd.setCursor(2,0);
  lcd.print("Hallo dunia!");
  lcd.setCursor(3,1);
  lcd.print("Vina-19011");
  delay(3000);
  lcd.clear();

//anu lampu led
  pinMode(LedJanda, OUTPUT);
//anu button banh
  pinMode(button, INPUT_PULLUP);

//anu rtc
  rtc.begin();
}

void loop(){
  clockOn();
  DateTime now = rtc.now();

    lcd.setCursor(0, 0);
    lcd.println(weekDay[now.dayOfTheWeek()]); 
    lcd.setCursor(8, 0);
    if(now.day()<10){
      lcd.print("0");
    }
    lcd.print(now.day(), DEC); 
    lcd.print("/");
    if(now.month()<10){
      lcd.print("0");
    }
    lcd.print(now.month(), DEC);
    lcd.print("/");
    lcd.print(now.year(), DEC); 

  lcd.setCursor(4, 1);
    if(now.hour()<10){
      lcd.print("0");
    }
    lcd.print(String(now.hour()));
    lcd.print(":");
    if(now.minute()<10){
      lcd.print("0");
    }
    lcd.print(String(now.minute()));
    lcd.print(":");
    if(now.second()<10){
      lcd.print("0");
    }
    lcd.print(String(now.second()));
}

 void clockOn() {

  counterState = digitalRead(button);

  if(counterState==LOW){
    if(counterValue=="rehat"){
      counterValue="idup";
      digitalWrite(LedJanda, HIGH);
      delay(100);
    } else if(counterValue=="idup"){
      counterValue="rehat";
      digitalWrite(LedJanda, LOW);
      delay(100);

    }
    lcd.clear();
    lcd.setCursor(2,0);
    lcd.print("led or diyan");
    lcd.setCursor(6,1);
    lcd.print(counterValue);
    delay(2000);
    lcd.clear();
    }
  }