/*create by group
 muhd fawwaz
 MOHD NAZRI BIN MOHD ZUKI - 52103121615
 aqil fitri
this programe about barn temperature and will automatically open the window if the
surrounding getting too hot*/

//define and declare
#include <LiquidCrystal_I2C.h>
#include <Servo.h>
#include "DHT.h"
#define DHTPIN 13
#define speakerPin 10
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo myservo;

int led = 2;
void setup()
{
  //FOR OUTPUT
  Serial.begin(11500);
  Serial.println("BARN TEMPERATURE MONITORING SYSTEM");
  //for lcd display
  lcd.begin(16, 2);
  //led and speaker
  dht.begin();
  pinMode(led, OUTPUT);
  pinMode(speakerPin, OUTPUT);
  //the servo attach
  myservo.attach(3);
}

void loop()
{
  //read surrounding temperature and humidity
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  delay(50);

  //DISPLAY LCD
  lcd.setCursor(0,0);
  lcd.println("TEMP:");
  lcd.print(t);
  lcd.println(" 'C");
  lcd.setCursor(0,1);
  lcd.println("HUMID:");
  lcd.print(h);
  lcd.println(" %");

  //DISPLAY THE SERIAL
  Serial.print("TEMPERATURE ");
  Serial.print(t);
  Serial.print(" *C\t");
  Serial.print("HUMIDITY: ");
  Serial.print(h);
  Serial.println(" %");

  if(t>30)
  {
    //led will turn on if the temperature more than 30 celcius
    digitalWrite(led, HIGH); 
    delay(250);
    digitalWrite(led, LOW);
    delay(250);
    myservo.write(0); //the servo turn 0 degrees left
    delay(1000);
    //speker will turn on if the temperature more than 30 celcius
    tone(speakerPin, 50, 1000);
    delay(500);
    noTone(speakerPin);
    delay(500);
  }
  else
  {
    //led will turn off if the temperature less than 30 celcius
    digitalWrite(led, LOW); 
    myservo.write(180); 
    delay(1000);           
  }
}