#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);

#include "DHT.h"
#define pinDHT 2

#define typDHT22 DHT22    


// inicializace DHT senzoru s nastaveným pinem a typem senzoru
DHT dht(pinDHT, typDHT22);


byte stupen[] = {
  B11110,
  B10010,
  B10010,
  B11110,
  B00000,
  B00000,
  B00000,
  B00000
};

byte smajl[] = {
  B00000,
  B00000,
  B01010,
  B01010,
  B01010,
  B00000,
  B10001,
  B01110
};

byte smutnysmajl[] = {
  B00000,
  B00000,
  B01010,
  B01010,
  B01010,
  B00000,
  B01110,
  B10001
};

void setup() {

  lcd.init();
  lcd.backlight();
  dht.begin();
  lcd.createChar(0, stupen);
  lcd.createChar(1, smajl);
  lcd.createChar(2, smutnysmajl);

  pinMode(3, INPUT_PULLUP); 
  pinMode(4, INPUT_PULLUP); 
  pinMode(13, OUTPUT);

}

void loop() {

  float tep = dht.readTemperature();
  float pridat = 

  if (isnan(tep)) {
    lcd.print("Chyba pri cteni z DHT senzoru!");
  } else {

    lcd.setCursor(0,0);
    lcd.print("Zadana tep.: "); 
    lcd.print(tep);
    lcd.write(0);
    lcd.print("C"); 
    lcd.setCursor(0,3);
  }

  delay(2000);

  if (tep >= 28) {

    lcd.print("Teplota je dobra ");
    lcd.write(1);

  } else {

    lcd.print("Teplota je spatna ");
    lcd.write(2);

  }

  if(digitalRead(4)){
  digitalWrite(13,0);
}
else{
  digitalWrite(13,1);
}

lcd.setCursor(0,1);
lcd.print("Aktualni tep.:"); 


  delay(200);



}