Guys, In the Arduino Real Time Clock Tutorial, we will learn about Real-Time Clock and how Arduino and Real-Time Clock IC DS1307 are interfaced as a timekeeping device. Okay, let's make it.
Components Required
| 1. | Arduino UNO | * 1 |
| 2. | DS1307 RTC Module | * 1 |
| 3. | LCD(16*2) | * 1 |
| 4. | Jumper Wires | * 1 |
Circuit Diagram
Program
#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());
}