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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
RTC_DS3231 rtc;

void setup() {
  Wire.begin();  // ✅ FIXED

  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  rtc.begin();
}

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

  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(10, 20);

  // ✅ FIXED print instead of printf
  display.print(now.hour());
  display.print(":");
  display.print(now.minute());
  display.print(":");
  display.print(now.second());

  display.display();
  delay(1000);
}