#include "RTClib.h"
#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
RTC_DS1307 rtc;

#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
#define MAX_DEVICES 4

#define CLK_PIN   52
#define DATA_PIN  51
#define CS_PIN    53

// Hardware SPI connection
MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
// Arbitrary output pins
// MD_Parola P = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);

void setup(void)
{
  Serial.begin(9600);

  P.begin();

  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }
}

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

  int hour = now.hour();
  int minute = now.minute();
  int second = now.second();
  String colon = ":";
  String time = "  " +String(hour) + String(colon) + String(minute);
  String fulltime = String(hour) + String(colon) + String(minute)+String(colon)+String(second);
  Serial.println(fulltime);
  delay(1000);

  P.print(time);
}