#include <TFT_eSPI.h>   // Hardware-specific library
#include <RTClib.h>
#include "NotoSansBold36.h"   // Smooth Font

RTC_DS1307 rtc;               // RTC Clock Object
TFT_eSPI tft = TFT_eSPI();

int xPos {0};
int yPos {0};

void setup(void) {
  rtc.begin();
  tft.begin();

  tft.setRotation(3);
  tft.fillScreen(TFT_BLUE);
  tft.loadFont(NotoSansBold36);   // tft Font

  // Adding a parameter "true" to the setTextColor() function fills character background
  // This extra parameter is only for smooth fonts! (tft Fonts)
  tft.setTextColor(TFT_GREEN, TFT_BLUE, true);
  tft.setTextPadding(tft.textWidth("55555"));  // Textpadding zum löschen der "alten" Ausgabe
  tft.setTextDatum(MC_DATUM);                  // Textausrichtung
  xPos = tft.width() / 2;                      // x Position Textausgabe
  yPos = tft.height() / 2;                     // y Position Textausgabe
}

void loop() {
  static byte lastSecond {61};
  DateTime now = rtc.now();
  /*********** Blinki Blinki ;) *********/
  byte second = now.second();
  if (second != lastSecond) {
    lastSecond = second;
    char timeBuffer[7];
    snprintf(timeBuffer, 6, "%02d%c%02d", now.hour(), (second & 1) ? ':' : ' ', now.minute());
    tft.drawString(timeBuffer, xPos, yPos);
  }
}