#include <LiquidCrystal_I2C.h>
#include <RTClib.h>
LiquidCrystal_I2C lcd(0x27,16,2);  // 0x27,0x3F
RTC_DS1307 rtc;

#define led  5


int jam,menit,detik,tanggal,bulan,tahun;
char buff[30];

void setup() {
  pinMode(led,OUTPUT);
  
  lcd.backlight(); lcd.init();
  lcd.setCursor(0,0); lcd.print("SAYA GANTENG");
  if(rtc.begin()) {
    lcd.setCursor(0,1); lcd.print("RTC OKEE");
  } 
  else {
    lcd.setCursor(0,1); lcd.print("RTC ERROR");
  }
  delay(2000); lcd.clear();
  rtc.adjust(DateTime(2022,12,9,10,40,50));
}

void loop() {
  DateTime now = rtc.now();
  jam = now.hour();
  menit = now.minute();
  detik = now.second();
  tanggal = now.day();
  bulan = now.month();
  tahun = now.year();
  lcd.setCursor(0,0); 
  sprintf(buff,"JAM %02d:%02d:%02d WIB",jam,menit,detik);
  lcd.print(buff); 
  lcd.setCursor(0,1); 
  sprintf(buff,"TGL %02d-%02d-%04d",tanggal,bulan,tahun);
  lcd.print(buff);
  
  if(jam==10 && menit==41 && detik==0) {
    lcd.setCursor(0,0); lcd.print("WAKTUNYA MAKAN  ");
    for(int i=0;i<10;i++) {
      digitalWrite(led,HIGH); delay(500);  //Lampu LED menyala berkedip
      digitalWrite(led,LOW); delay(500); // lampu led menyala berkedip
    }
  }

  if(jam==10 && menit==41 && detik==10) {
    digitalWrite(led,LOW); // lampu led padam
  }
}