#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "RTClib.h"
LiquidCrystal_I2C lcd(0x27,16,2);
RTC_DS1307 rtc;

int buzzer = 3;
int relay = 4;
int sensorPin = A0;
int sensorValue = 0;

char nama2hari[7][12] = {"Minggu", "Senin", "Selasa", "Rabu", "kamis", "Jum'at", "Sabtu"};

void setup(){
  lcd.init();
  lcd.backlight();
  pinMode (sensorPin, INPUT);
  pinMode (buzzer,OUTPUT);
  pinMode (relay, OUTPUT);
  if (! rtc.begin())
  {
    lcd.print("RTC tidak tersedia");
    while(1);
  }
  if (! rtc.isrunning())
  {
    lcd.print("RTC tidak berfungsi");
  }
///rtc.adjust(DateTime(F(_DATE_),F(TIME)));  
}

void loop() {

  DateTime now = rtc.now();
  lcd.setCursor(0,0);
  lcd.print(nama2hari[now.dayOfTheWeek()]);
  lcd.print(" ");
  lcd.print(now.day());
  lcd.print("/");
  lcd.print(now.month());
  lcd.print("/");
  lcd.print(now.year());
  lcd.print("   ");

  lcd.setCursor(0, 1);
  lcd.print(now.hour());
  lcd.print(" : ");
  lcd.print(now.minute());
  lcd.print(" : ");
  lcd.print(now.second());
  lcd.print(" ");

  if(now.hour()==12)
  {
    digitalWrite(relay,HIGH);
    lcd.setCursor(13, 1);
    lcd.print("ON ");
  }else{
    digitalWrite(relay, LOW);
    lcd.setCursor(13, 1);
    lcd.print("OFF");
}
  sensorValue = analogRead(sensorPin);
    if(sensorValue <100)
    {
      tone (buzzer, 300, 250);
      delay(500);
      tone (buzzer, 160, 250);
      delay(500);
    }else{
      noTone(buzzer);
    }
}