#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "RTClib.h"

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

// I2C RTC
TwoWire I2C_RTC = TwoWire(0);

// I2C OLED
TwoWire I2C_OLED = TwoWire(1);

RTC_DS3231 rtc;

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &I2C_OLED, -1);

void setup() {
  Serial.begin(115200);

  // RTC I2C
  I2C_RTC.begin(25, 26);

  // OLED I2C
  I2C_OLED.begin(5, 4);

  if (!rtc.begin(&I2C_RTC)) {
    Serial.println("RTC tidak ditemukan");
    while (1);
  }

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println("OLED gagal");
    while (1);
  }

  display.clearDisplay();
}

void loop() {

  DateTime now = rtc.now();

  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(SSD1306_WHITE);

  display.setCursor(0,10);

  display.print(now.hour());
  display.print(":");
  display.print(now.minute());
  display.print(":");
  display.print(now.second());

  display.display();

  delay(1000);
}