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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET     4
#define SCREEN_ADDRESS 0x3D
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

RTC_DS1307 RTC;

void setup() {

  if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }
  RTC.begin();
}

void loop() {
  DateTime now = RTC.now();
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(50, 10);
  display.println("TIME:");
  display.setTextSize(1);
  display.setCursor(40, 20);
  display.println(now.timestamp(DateTime::TIMESTAMP_TIME));
  display.setTextSize(1);
  display.setCursor(50, 35);
  display.println("DATE:");
  display.setTextSize(1);
  display.setCursor(35, 46);
  display.println(now.timestamp(DateTime::TIMESTAMP_DATE));
  display.display();
  delay(100);
}