#include <DHT22.h>
#include <LiquidCrystal_I2C.h>
#include <RTClib.h>
#include <Servo.h>
#include <Wire.h>

const int trigger_pin = 3;
const int echo_pin = 5;
const int buzzer = 10;
const int servo_pin = 9;
const int data_pin = 8;
const int ledPin_room = 13;
const int ledPin_rtc = 12;
const int minimum_dist = 350;
float distance, duration;
String decision_room;

DHT22 dht(data_pin);
LiquidCrystal_I2C lcd(0x27, 20, 4);
RTC_DS1307 rtc;
Servo myservo;

void setup() {
  
  lcd.init();
  lcd.backlight();
  rtc.begin();

  lcd.println("A Home Security and");
  delay(500);

  lcd.setCursor(0,1);
  lcd.println("Auto-Kettle System..");
  delay(500);

  lcd.setCursor(0,2);
  lcd.println("Made By :-");
  delay(500);

  lcd.setCursor(0,3);
  lcd.println("Team MITRA !!");
  delay(5000);

  lcd.clear();
  //dht.begin();

  myservo.attach(servo_pin);
  myservo.write(0);

  pinMode(buzzer, OUTPUT);
  digitalWrite(buzzer, LOW);

  pinMode(trigger_pin, OUTPUT);
  pinMode(echo_pin, INPUT);

  if (!rtc.isrunning()) {
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  pinMode(ledPin_room, OUTPUT);
  pinMode(ledPin_rtc, OUTPUT);
}

void loop() {
  // Code for the working of DHT22 :-
  float temp = dht.getTemperature();
  float humidity = dht.getHumidity();

  lcd.setCursor(0,0);
  lcd.print("Temp : ");
  lcd.print(temp);
  lcd.println(" C");
  delay(1000);

  if(temp>70) {
    tone(buzzer, 2000);
    delay(500);
    noTone(buzzer);
  }

  digitalWrite(trigger_pin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigger_pin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger_pin, LOW);

  duration = pulseIn(echo_pin, HIGH);
  distance = duration / 58.2;

  if(distance < minimum_dist) {
    decision_room = "ON";
    digitalWrite(ledPin_room, HIGH);
    delay(500);
  }
  else{
    decision_room = "OFF";
    digitalWrite(ledPin_room, LOW);
    delay(500);
  }
  
  lcd.setCursor(0,1);
  lcd.print("Room Lights : ");
  lcd.println(decision_room);
  delay(500);

  lcd.setCursor(0,2);
  lcd.print("Room Fans : ");
  lcd.println(decision_room);
  delay(500);

  // Code for the working of RTC Module :-
  DateTime now = rtc.now();
  int currentHour = now.hour();
  int currentMinute = now.minute();
  
  lcd.setCursor(0,3);
  lcd.println("This will save ENERGY !!");

  if (
    (currentHour == 00 && currentMinute >= 0 && currentMinute <= 05) ||
    (currentHour == 14 && currentMinute >= 30 && currentMinute <= 35)
  ) {
    digitalWrite(ledPin_rtc, HIGH);
  } else {
    digitalWrite(ledPin_rtc, LOW);
  }



  
  for(int i=0; i<=180; i++){
    myservo.write(i);
    delay(10);
  }

  for(int i=180; i>=0; i--){
    myservo.write(i);
    delay(10);
  }
}