#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
//---------------------------------------------------------

#include "RTClib.h"
RTC_DS1307 RTC;
#define adjustRtc 12 // if this pin=low update rtc from pc clock
void setup () {
    Serial.begin(115200);
    Wire.begin();
    RTC.begin();
  if (! RTC.isrunning()) {
    Serial.println("RTC is NOT running!");
    // following line sets the RTC to the date & time this sketch was compiled
    RTC.adjust(DateTime(__DATE__, __TIME__));}
 //---------------------------------------------------------------------------------
  lcd.init();
 lcd.backlight();
 lcd.clear();
 lcd.print(" hello ");
 delay(2000);
 lcd.setCursor(0,1);
 lcd.print("____________ ");
 delay(2000);
 lcd.clear();
 lcd.home();
 delay(100); 
 pinMode(12,INPUT_PULLUP);  
 
  }

void loop () {
    if(digitalRead(adjustRtc)==0)
    {      delay(100);
           RTC.adjust(DateTime(__DATE__, __TIME__));
     }

    DisplayDateTime();
    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(); 
          
}

void DisplayDateTime()
{
   DateTime now = RTC.now(); 
  lcd.setCursor(0, 1);
  lcd.print("Clock:");
  lcd.print(now.hour()/10);
  lcd.print(now.hour() % 10);
  lcd.print(":");
  lcd.print( now.minute() / 10);
  lcd.print( now.minute() % 10);
  lcd.print(":");
  lcd.print( now.second() / 10);
  lcd.print( now.second() % 10);
  lcd.setCursor(0, 0);
  lcd.print("Date:");
  lcd.print(now.day()/10);
  lcd.print(now.day() % 10);
  lcd.print("/");
  lcd.print( now.month() / 10);
  lcd.print( now.month() % 10);
  lcd.print("/");
  lcd.print( now.year() / 10);
  lcd.print( now.year() % 10);
}