// Date and time functions using a DS1307 RTC connected via I2C and Wire lib
	
	#include <Wire.h>
	#include <SPI.h>
	#include <RTClib.h>
	#include <RTC_DS1307.h>
	#define CLOCK_ADDRESS 0x68
        void RTC_write_register(unsigned char reg,unsigned char value)
{
  Wire.beginTransmission(CLOCK_ADDRESS);
  Wire.send(reg);
  Wire.send(value);
  Wire.endTransmission();
}
	RTC_DS1307 RTC;
	
	void setup () {
 

	    Serial.begin(9600);
	    Wire.begin();
	    RTC.begin();
	    DateTime now = RTC.now();
	    DateTime compiled = DateTime(__DATE__, __TIME__);
	    if (now.unixtime() < compiled.unixtime()) {
	    Serial.println("RTC is older than compile time! Updating");
	    // following line sets the RTC to the date & time this sketch was compiled
	    RTC.adjust(DateTime(__DATE__, __TIME__));
	RTC_write_register(0x0B,0);
  RTC_write_register(0x0C,0x80);
  RTC_write_register(0x0D,0x80);
  RTC_write_register(0x0E,6);

}
	}
	
	void loop () {
	    DateTime now = RTC.now();
	     
	    Serial.print(now.year(), DEC);
	    Serial.print('/');
	    Serial.print(now.month(), DEC);
	    Serial.print('/');
	    Serial.print(now.day(), DEC);
	    Serial.print(' ');
	    Serial.print(now.hour(), DEC);
	    Serial.print(':');
	    Serial.print(now.minute(), DEC);
	    Serial.print(':');
	    Serial.print(now.second(), DEC);
	    Serial.println();
	     
	
	     
	    	     
	    Serial.println();
    delay(3000);
}