Arduino 18

Arduino Real Time Clock Tutorial using DS1307

Code

	// Date and time functions using a DS1307 RTC connected via I2C and Wire lib
	#include <Wire.h>
	#include <LiquidCrystal.h>
	#include "RTClib.h"
	RTC_DS1307 rtc;
	LiquidCrystal lcd(7, 6, 5, 4, 3, 2); // (rs, e, d4, d5, d6, d7)
	char daysOfTheWeek[7][12] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
	void setup ()
	{
	Serial.begin(9600);
	lcd.begin(16, 2);
	if (! rtc.begin())
	{
	lcd.print("Couldn't find RTC");
	while (1);
	}
	if (! rtc.isrunning())
	{
	lcd.print("RTC is NOT running!");
	}
	rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));//auto update from computer time
	//rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));// to set the time manualy
	}
	void loop ()
	{
	DateTime now = rtc.now();
	lcd.setCursor(0, 1);
	lcd.print(now.hour());
	lcd.print(':');
	lcd.print(now.minute());
	lcd.print(':');
	lcd.print(now.second());
	lcd.print(" ");
	lcd.setCursor(0, 0);
	lcd.print(daysOfTheWeek[now.dayOfTheWeek()]);
	lcd.print(" ,");
	lcd.print(now.day());
	lcd.print('/');
	lcd.print(now.month());
	lcd.print('/');
	lcd.print(now.year());
	}