int pilih, detik;
int year, month, day, hour, minute, second;
bool salah=1;
#include <RTClib.h>

RTC_DS1307 rtc;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);

  rtc.begin();
  // rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));//pembaruan otomatis dari waktu komputer
  // rtc.adjust(DateTime(year, month, day, hour, minute, second));// untuk mengatur waktu secara manual

  Serial.println("Sistem Ready !");
  menu();
}

void loop() {
  // put your main code here, to run repeatedly:
  DateTime now = rtc.now();
  Serial.println(
    "Date Now : " +
    now.timestamp(DateTime::TIMESTAMP_DATE) +
    " And Time :  " +
    now.timestamp(DateTime::TIMESTAMP_TIME)
  );

  if(Serial.available()){
    pilih = Serial.parseInt();
    if (pilih==9) menu();
  }
  Serial.println(detik);
  detik++;
  delay(1000);
}

void menu () {
  DateTime now = rtc.now();
  
  Serial.println("Menu:");
  Serial.println("1. Setting Date");
  Serial.println("2. Setting Time");
  Serial.println("3. Tampil, tekan 9 jika ingin kembali ke menu");
 do{
    if(Serial.available()){
      pilih = Serial.parseInt();
      if (pilih==1){
        Serial.println("Set Date (1-31): ");
        while (Serial.available() == 0);
        day = Serial.parseInt();
        Serial.println("Set Month (1-12): ");
        while (Serial.available() == 0);
        month = Serial.parseInt();
        Serial.println("Set Year (4 digit): ");
        while (Serial.available() == 0);
        year = Serial.parseInt();
        rtc.adjust(DateTime(year, month, day, hour, minute, second));

        salah=0;
        Serial.println("Date is Uptodate!");
        break;
      }
      else if (pilih==2){
        Serial.println("Set Hour (0-23): ");
        while (Serial.available() == 0);
        hour = Serial.parseInt();
        Serial.println("Set Minute (0-59): ");
        while (Serial.available() == 0);
        minute = Serial.parseInt();
        Serial.println("Set Second (0-59): ");
        while (Serial.available() == 0);
        second = Serial.parseInt();
        rtc.adjust(DateTime(year, month, day, hour, minute, second));

        salah=0;
        Serial.println("Time is Uptodate!");
        break;
      }
      else if (pilih==3){
        loop();
        salah=0;
      }
      else {
        Serial.println("Pilihan tidak ada");
        salah=1;
      }
    }
  }while(salah==1);

}