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

#define SERIAL_OPTION 0

LiquidCrystal_I2C lcd(0x27,16,2); 
RTC_DS1307 RTC;

float value;
int tmp = A0;
int servoPin = 8;
int buzzer_pin = 11;
int trigger_pin = 12;
int echo_pin = 13;
int time;
int distance;

Servo servo1;
void setup() 
{
  pinMode(buzzer_pin, OUTPUT);
  Serial.begin(9600);
  servo1.attach(servoPin);
  lcd.begin(16, 2);
  pinMode(2,INPUT);
  pinMode(4,OUTPUT);
  pinMode(11,OUTPUT);
  //pinMode(10,INPUT);
  //pinMode(2,OUTPUT);
  //pinMode(8,OUTPUT);
  //pinMode(9,output);
  //pinMode(11,OUTPUT);
  //pinMode(13,OUTPUT);
  //pinMode(14,OUTPUT);z
  
  pinMode(12,OUTPUT);
  pinMode(13,OUTPUT);
  pinMode(A0,INPUT);
  pinMode (trigger_pin, OUTPUT); 
  pinMode (echo_pin, INPUT);
  digitalWrite(2,LOW);
  digitalWrite(11,HIGH);
  //digitalWrite(5,OUTPUT);
  digitalWrite(3,OUTPUT);
  digitalWrite(7,OUTPUT);
  digitalWrite(11,OUTPUT);
  digitalWrite(13,OUTPUT);
  //digitalWrite(A0,OUTPUT);
  RTC.begin();
}

void loop() 
{
  DateTime now=RTC.now();
  if (SERIAL_OPTION) {
    Serial.print(now.year()); Serial.print("/");
    Serial.print(now.month()); Serial.print("/");
    Serial.print(now.day()); Serial.print(" ");

    Serial.print(now.hour()); Serial.print(":");
    Serial.print(now.minute()); Serial.print(":");
    Serial.print(now.second()); Serial.print("\n");
  }
  
  lcd.setCursor(0,0); lcd.print("DATE: ");
  lcd.print(now.year()); lcd.print("/"); lcd.print(now.month()); lcd.print("/"); lcd.print(now.day());
  lcd.setCursor(0,1); lcd.print("TIME: ");
  lcd.print(now.hour()); lcd.print(":"); lcd.print(now.minute()); lcd.print(":"); lcd.print(now.second());

  delay(1000);

  long duration, inches, cm;

  digitalWrite(trigger_pin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigger_pin, HIGH);
  delayMicroseconds(5);
  digitalWrite(echo_pin, LOW);

  duration = pulseIn(echo_pin, HIGH);
  inches = microsecondsToInches(duration);
  cm = microsecondsToCentimeters(duration);
  
  servo1.write(0);
  
  
  if(cm < 40)
  {
    servo1.write(90);
    lcd.setCursor(0,1);
    lcd.print("Door:OPEN");
    digitalWrite (buzzer_pin, HIGH);
    tone(buzzer_pin, 1000);
    delay (500);
    noTone(buzzer_pin);
    tone(buzzer_pin, 1000);
    delay(500);
    noTone(buzzer_pin);
    delay(500);

  }

  else
  {
    servo1.write(0);
    lcd.setCursor(0,1);
    lcd.print("Door:CLOSED");
    digitalWrite (buzzer_pin, LOW);
    delay(500);
      
  }
  
  int pir = digitalRead(2);
  
  if(pir == HIGH)
  {
    digitalWrite(4,HIGH);
    lcd.setCursor(10,0);
    lcd.print("LED:ON");
   // delay(500);
  }
  else if(pir == LOW)
     lcd.setCursor(12,0);
    lcd.print("OFF");
  {
    digitalWrite(4,LOW);
  }
  
 value = analogRead(tmp)*0.004882814;
  value = (value - 0.5) * 100.0;
  lcd.setCursor(0,0);
	lcd.print("Tmp:");
  	lcd.print(value);
  	delay(1000);
  
  
  if(value > 20)
  {
    digitalWrite(12,HIGH);
    digitalWrite(13,LOW);
  }
  else
  {
    digitalWrite(12,LOW);
    digitalWrite(13,LOW);
  }
  lcd.clear();
}

long microsecondsToInches(long microseconds) {
  return microseconds / 74 / 2;
}

long microsecondsToCentimeters(long microseconds) {
  return microseconds / 29 / 2;
}