// Date and time functions using a DS1307 RTC connected via I2C and Wire lib
#include "RTClib.h"
#include <LiquidCrystal_I2C.h>
  
RTC_DS1307 rtc;

char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
int led1=14;

int lcdColumns = 16;     //lcd colum
int lcdRows = 2;         // moniter
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);

void setup () {
  Serial.begin(57600);
 lcd.init();
  lcd.backlight();
  pinMode(led1,OUTPUT);

#ifndef ESP8266
  while (!Serial); // wait for serial port to connect. Needed for native USB
#endif
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    while (1) delay(10);
  }

  if (! rtc.isrunning()) {
    Serial.println("RTC is NOT running, let's set the time!");
    // When time needs to be set on a new device, or after a power loss, the
    // following line sets the RTC to the date & time this sketch was compiled
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
    // This line sets the RTC with an explicit date & time, for example to set
    // January 21, 2014 at 3am you would call:
    // rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
  }

  // When time needs to be re-set on a previously configured device, the
  // following line sets the RTC to the date & time this sketch was compiled
  // rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  // This line sets the RTC with an explicit date & time, for example to set
  // January 21, 2014 at 3am you would call:


  // rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));


}

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(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    Serial.print(" since midnight 1/1/1970 = ");
    Serial.print(now.unixtime());
    Serial.print("s = ");
    Serial.print(now.unixtime() / 86400L);
    Serial.println("d");

    // calculate a date which is 7 days, 12 hours, 30 minutes, and 6 seconds into the future
    DateTime future (now + TimeSpan(7,12,30,6));

   /* Serial.print(" now + 7d + 12h + 30m + 6s: ");
    Serial.print(future.year(), DEC);
    Serial.print('/');
    Serial.print(future.month(), DEC);
    Serial.print('/');
    Serial.print(future.day(), DEC);
    Serial.print(' ');
    Serial.print(future.hour(), DEC);
    Serial.print(':');
    Serial.print(future.minute(), DEC);
    Serial.print(':');
    Serial.print(future.second(), DEC);
    Serial.println();*/
   

    lcd.setCursor(0,0);
   // lcd.printf("%d",DEC);
lcd.print(now.day(), DEC);
lcd.print("/");
lcd.print(now.month(), DEC);
lcd.print("/");
lcd.print(now.year(), DEC);


 lcd.setCursor(0,1);
   // lcd.printf("%d",DEC);
lcd.print(now.hour(), DEC);
lcd.print(":");
lcd.print(now.minute(), DEC);lcd.print(":");
lcd.print(now.second(), DEC);

if (now.second()==0 && now.hour()==21 && now.minute()==0)
{ digitalWrite(led1,1);
delay(100);
  digitalWrite(led1,0);
  delay(900);
  digitalWrite(led1,1);
delay(100);
  digitalWrite(led1,0);
  delay(900);digitalWrite(led1,1);
delay(100);
  digitalWrite(led1,0);
  delay(900);digitalWrite(led1,1);
delay(100);
  digitalWrite(led1,0);
  delay(900);
  
Serial.println("start ");


}
  if (now.second()==0 && now.hour()==21 && now.minute()==5)
       digitalWrite(led1,0);
      delay(100);

    delay(1000);
   lcd.clear();


}