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

#define DHTPIN 14  
#define LED 25
#define LED2 26
#define LED3 27


DHT dht(DHTPIN, DHT22);
LiquidCrystal_I2C lcd(0x27, 16, 2);  

void setup() {
    pinMode(LED, OUTPUT);
    pinMode(LED2, OUTPUT);
    pinMode(LED3, OUTPUT);
    digitalWrite(LED, LOW);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, LOW);

    lcd.init();
    lcd.backlight();
    lcd.setCursor(0, 0);
    lcd.print("ESP32 Teplomer");
    delay(2000);

    dht.begin();  
}

void loop() {
    delay(2000);  

    float teplota = dht.readTemperature(); 
    float vlhkost = dht.readHumidity(); 

    // Kontrola správnosti údajov
    if (isnan(teplota) || isnan(vlhkost)) {
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Chyba senzora!");
        return;
    }

    // Výpis na LCD
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Teplota: ");
    lcd.print(teplota);
    lcd.print(" C");

    lcd.setCursor(0, 1);
    lcd.print("Vlhkost: ");
    lcd.print(vlhkost);
    lcd.print(" %");

    
    if (teplota > 40) {
        digitalWrite(LED, HIGH);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, LOW);
    } else if (teplota > 10 && teplota <= 40) {
        digitalWrite(LED, LOW);
        digitalWrite(LED2, HIGH);
        digitalWrite(LED3, LOW);
    } else {
        digitalWrite(LED, LOW);
        digitalWrite(LED2, LOW);
        digitalWrite(LED3, HIGH);
    }
}