#include <DHT.h>
#include <LiquidCrystal_I2C.h>

//Constants
#define LCD_ADDR 0x27
#define LCD_COLUMNS 16
#define LCD_ROWS 2
#define DHTPIN 6        //dht pin
#define DHTTYPE DHT22   
DHT dht(DHTPIN,DHTTYPE); //Initailise DHT sensor for normal 16MHz Arduino


//Variables
float hum;  //Store Humidity value
float temp; //Store Temperature value
float volume; //Store Decibel value
int movement; // Motion Detection Value

float SOUND_PIN = A0;
int MOTION_PIN = 8;
int BUZZER_PIN = 9;
LiquidCrystal_I2C lcd(LCD_ADDR,LCD_COLUMNS,LCD_ROWS);

void setup() 
{
pinMode(SOUND_PIN,INPUT);
pinMode(MOTION_PIN,INPUT);
pinMode(BUZZER_PIN,OUTPUT);

lcd.begin(16,2);
lcd.init();
lcd.backlight();

Serial.begin(9600);
dht.begin();

}

void loop() {

  //Read data and store it to variables hum and temp
  hum = dht.readHumidity();
  temp = dht.readTemperature();
  volume = analogRead(SOUND_PIN);
  movement = digitalRead(MOTION_PIN);

  if (temp <= 19.00 || temp > 27.00) {
    digitalWrite(BUZZER_PIN,HIGH);
  }
  else{
    digitalWrite(BUZZER_PIN,LOW);
  }



  //Print temp and humidity values to serial monitor
  Serial.print("\n");
  Serial.print("Humidity: ");
  Serial.print(hum);
  Serial.println(" %");
  Serial.print("Temp: ");
  Serial.print(temp);

  Serial.println(" C");
  Serial.print("Volume: ");
  Serial.println(volume);
  Serial.print("----------");
  delay(2000);          //Dealy 2 secs
  

}