#include <LiquidCrystal.h>
#include "DHT.h"

#define DHTPIN 7     
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

DHT dht(DHTPIN, DHTTYPE);

// LCD pins <--> Arduino pins
const int RS = 13, EN = 12, D4 = 11, D5 = 10, D6 = 9, D7 = 8;
LiquidCrystal lcd(RS, EN, D4, D5, D6, D7);

const int rlyPin = 2;

void setup()
{
  pinMode(rlyPin, OUTPUT);

  lcd.begin(16, 2); // set up number of columns and rows
  dht.begin();
 
  lcd.setCursor(5, 0);         // move cursor to   (0, 0)
  lcd.print("Hello");        // print message at (0, 0)
  lcd.setCursor(2, 1);         // move cursor to   (2, 1)
  lcd.print("World"); // print message at (2, 1)

  digitalWrite(rlyPin, HIGH);
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Check if any reads failed and exit early (to try again).
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  lcd.setCursor(0, 0);
  lcd.print("Temperature:");
  lcd.print(temperature);
  lcd.println("°C ");
  
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.println("%");

  delay(2000);
}