#include "DHT.h"

#define DHTPIN 2     // Digital pin connected to the DHT sensor
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
DHT dht(DHTPIN, DHTTYPE);

const int relay1Pin = 5;

void setup() {
  pinMode(relay1Pin, OUTPUT);

  dht.begin();
}

void loop() {
  delay(2000);

  float h = dht.readHumidity();
  float t = dht.readTemperature();

  if (h < 50) {
    digitalWrite(relay1Pin,HIGH);
  } else {
    digitalWrite(relay1Pin,LOW);
  }
}