#include "DHT.h"

#define DHTPIN 4  
#define DHTTYPE DHT22   
DHT dht(DHTPIN, DHTTYPE);

void setup() { 
  Serial.begin(115200);
  Serial.println(F("DHTxx test!"));

  dht.begin();
}

void loop() {

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

  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }
	Serial.print("Temperature = ");
	Serial.print(t);
	Serial.print(" ");
	Serial.print((char)176);
	Serial.print("C | ");
	Serial.print((t * 9.0) / 5.0 + 32.0);
	Serial.print(" ");
	Serial.print((char)176);
	Serial.println("F ");
	Serial.print("Humidity = ");
	Serial.print(h);
	Serial.println(" % ");
	Serial.println("");
	delay(2000); 
}