#include <Wire.h>
#include <RTClib.h>
RTC_DS1307 rtc; 
void setup() {
  Serial.begin(115200); 
  Wire.begin();
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }
  if (rtc.now().year() < 2000) {
    Serial.println("RTC is not initialized, setting the time!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
}
void loop() {
  DateTime now = rtc.now(); 
  Serial.print(now.day(), DEC);
  Serial.print('/');
  Serial.print(now.month(), 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);  }
GND5VSDASCLSQWRTCDS1307+