#include <SPI.h>
#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include "RTClib.h"
RTC_DS3231 rtc;
char t[32];
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup() {
  // put your setup code here, to run once:
 Serial.begin(9600);
 rtc.begin();
  rtc.adjust(DateTime(F(__DATE__),F(__TIME__)));
}

void loop() {
  // put your main code here, to run repeatedly:

  // Printing the results on the serial monitor

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  DateTime now = rtc.now();
  sprintf(t, "%02d:%02d:%02d", now.hour()-12, now.minute(), now.second());  
  Serial.print(F("Date/Time: "));
  Serial.println(t);

 
  display.clearDisplay();

  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(15, 10);
  display.print(t);
  
  
   sprintf(t, "%02d-%02d-%02d", now.day(), now.month(), now.year());  
  Serial.print(F("Date/Time: "));
  Serial.println(t);
   display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(5, 40);
  display.print(t);
  display.display(); 

  
  
  
}