// 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 Relay = 13;
int lcdColumns = 16;     //lcd colum
int lcdRows = 2;         // moniter
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);
int sw=27;
void setup () {
  Serial.begin(57600);
 lcd.init();
  lcd.backlight();
  pinMode(led1,OUTPUT);
  pinMode(Relay,OUTPUT);
  pinMode(sw,INPUT);

#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!");
   rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

}

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)); 

    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);


    delay(1000);
   lcd.clear();

if (now.second()%15 == 0 ){
digitalWrite(Relay,HIGH);
delay(50);}
else if(now.second()%5 == 0){
digitalWrite(Relay,0);
delay(50);}

Serial.println("start Alarm");


}