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

#define DHTPIN 2     // what pin we're connected to
#define DHTTYPE DHT11   // DHT 11 
DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 16, 2);

const int relay1 = 3;
const int relay2 = 4;

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  dht.begin();

  pinMode(relay1, OUTPUT);
  pinMode(relay2, OUTPUT);
}

void loop() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(t);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("Humi: ");
  lcd.print(h);
  lcd.print("%");

  if (t > 20) {
    digitalWrite(relay1, HIGH);
    lcd.setCursor (0, 2);
  } else {
    digitalWrite(relay1, LOW);
    lcd.setCursor (0, 2);
  }

  if (h > 5) {
    digitalWrite(relay2, HIGH);
    lcd.setCursor (0, 3);
  } else {
    digitalWrite(relay2, LOW);
    lcd.setCursor (0, 3);
  }
  delay(2000);
}