#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", "Jumat", "Sabtu"};

void setup() {
  // put your setup code here, to run once:
  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() {
  // put your main code here, to run repeatedly:

  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);
    }
  }
}