1.2.45. fejezet, 7 szegmenses óra és hőmérséklet kijelzés

#include <Wire.h>
#include "RTClib.h"
 
RTC_DS1307 RTC;
 
void setup () {
    Serial.begin(9600);
    Wire.begin();
    RTC.begin();
  // Check to see if the RTC is keeping time.  If it is, load the time from your computer.
  if (! RTC.isrunning()) {
    Serial.println("RTC is NOT running!");
    // This will reflect the time that your sketch was compiled
    RTC.adjust(DateTime(__DATE__, __TIME__));
  }
}
void loop () {
    DateTime now = RTC.now(); 
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(' ');
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();    
    delay(1000);
}