#include <Wire.h>
#include <RTClib.h>

RTC_DS1307 rtc;

const int digitPins[] = {2, 3, 4, 5}; // Define digit pins for 7-segment display
const int segmentPins[] = {6, 7, 8, 9, 10, 11, 12, 13}; // Define segment pins for 7-segment display

void setup() {
  Serial.begin(9600);

  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }

  for (int i = 0; i < 4; i++) {
    pinMode(digitPins[i], OUTPUT);
    digitalWrite(digitPins[i], HIGH); // Set all digits off initially
  }

  for (int i = 6; i <= 13; i++) {
    pinMode(i, OUTPUT);
    digitalWrite(i, LOW); // Set all segments off initially
  }
}

void loop() {
  displayDigit(2, 0);  // Menampilkan digit 2 pada digit pertama (posisi 0)
  delay(500);

  DateTime now = rtc.now();

  int hours = now.hour();
  int minutes = now.minute();

  Serial.print("Hours: ");
  Serial.println(hours);
  Serial.print("Minutes: ");
  Serial.println(minutes);

  // Display hours
  int tensHours = hours / 10;
  int unitsHours = hours % 10;
  displayDigit(tensHours, 0);
  displayDigit(unitsHours, 1);
  delay(500);

  // Display minutes
  int tensMinutes = minutes / 10;
  int unitsMinutes = minutes % 10;
  displayDigit(tensMinutes, 2);
  displayDigit(unitsMinutes, 3);
  delay(500);
}

void displayDigit(int digit, int position) {
  digitalWrite(digitPins[position], LOW);
  for (int i = 0; i < 7; i++) {
    digitalWrite(segmentPins[i], (digit & (1 << i)) != 0);
  }
  delay(1);
  digitalWrite(digitPins[position], HIGH);
}