/*
 * Created by ArduinoGetStarted.com
 *
 * This example code is in the public domain
 *
 * Tutorial page: https://arduinogetstarted.com/tutorials/arduino-oled-clock
 */

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



#define SCREEN_WIDTH 128 // OLED display width,  in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1); // // create SSD1306 display object connected to I2C
RTC_DS1307 rtc;

String date;
String time;

void setup() {
  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);         // wait for initializing
  oled.clearDisplay(); // clear display

  oled.setTextSize(2);          // text size
  oled.setTextColor(WHITE);     // text color
  //oled.setCursor(0, 10);        // position to display

  // SETUP RTC MODULE
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    while (true);
  }

  // automatically sets the RTC to the date & time on PC this sketch was compiled
  rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  time.reserve(10); // to avoid fragmenting memory when using String
}

void loop() {
int16_t x1;
int16_t y1;
uint16_t width;
uint16_t height;



// Clear the OLED display
oled.fillScreen(BLACK);

DateTime now = rtc.now();
date = "";
date += now.day();
date += "/";
date += now.month();
date += "/";
date += now.year();

time = "";
time += now.hour();
time += ':';
time += now.minute();
time += ':';
time += now.second();

// Print the date and time to the OLED display
oled.getTextBounds(date, 0, 0, &x1, &y1, &width, &height);
oled.setCursor((SCREEN_WIDTH - width) / 2, (SCREEN_HEIGHT + height) / 2);
oled.println(date);

oled.getTextBounds(time, 0, 0, &x1, &y1, &width, &height);
oled.setCursor((SCREEN_WIDTH - width) / 2, (SCREEN_HEIGHT - 3*height) / 2);
oled.print(time);

oled.display();
}