#include "DHT.h"
#define DHTPIN 2
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
  
  Serial.print("Celsius\t");
  Serial.println("Fahrenheit");
}

void loop() {
  delay(2000);
  
  float C = dht.readTemperature();
  float F = dht.readTemperature(true);
  
  if (isnan(C) || isnan(F)) {
    Serial.println("Error");
    return;
  }
  
  Serial.print(C);
  Serial.print("\t");
  Serial.println(F);
}