#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <dht.h>

LiquidCrystal_I2C lcd(0x27, 27 , 28);  // Ustawienie adresu ukladu na 0x27
dht DHT;
#define DHT11_PIN 7

const byte interruptPinINC = 2;
const byte interruptPinDEC = 3;

void setup()
{
  pinMode(8, OUTPUT);
  lcd.init();
  lcd.begin(16, 2);
  lcd.backlight(); // zalaczenie podwietlenia
  lcd.setCursor(0, 0);
  digitalWrite(8, LOW);
  pinMode(interruptPinINC, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(interruptPinINC), increase, FALLING);
  pinMode(interruptPinDEC, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(interruptPinDEC), decrease, FALLING);
}

volatile double given = 50;

void loop(){
  lcd.setCursor(0, 0);
  int chk = DHT.read11(DHT11_PIN);
  lcd.print("temp. ");
  lcd.print(DHT.temperature);
  lcd.print((char)223);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("zada. ");
  lcd.print(given);
  lcd.print((char)223);
  lcd.print("C");
  if (DHT.temperature >= given) {
    digitalWrite(8, LOW);
  } else {
    digitalWrite(8, HIGH);
  }
  delay(600);
}
void increase(){
  given++ ;
}
void decrease(){
  given-- ;
}