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

RTC_DS1307 rtc;

#define SCREEN_WIDTH 128 
#define SCREEN_HEIGHT 64 

Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

void setup()
{
  if (! rtc.begin()) {
   oled.setCursor(0, 1);
   oled.println("RTC is missing"); // checking for our RTC module is connected or not
   while (1);
 }
 if (! rtc.isrunning()) {
   oled.setTextSize(1);          
   oled.setTextColor(WHITE);     
   oled.setCursor(0, 1);       
   oled.println("RTC not working");
   
   rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
   
 }

  Serial.begin(9600);

  // initialize OLED display with address 0x3C for 128x64
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    while (true);
  }

  delay(1000);         
  oled.clearDisplay();  
 
}

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

  oled.setTextSize(3);          
  oled.setTextColor(WHITE);     
  oled.setCursor(0, 0);       
  oled.print(now.hour());
  oled.print(":");
  oled.print(now.minute());

  oled.setTextSize(2);
  oled.print(":");
  oled.print(now.second());

  oled.setTextSize(2); 
  oled.setCursor(0, 28);
  oled.print(now.day());
  oled.print("/");
  oled.print(now.month());
  oled.print("/");
  oled.print(now.year());

  oled.setTextSize(2); 
  oled.setCursor(0, 48);
  oled.print("Temp:");

  oled.display();
  oled.clearDisplay();  

  


}