#include 

#define DHTPIN 8
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
}

void loop() {

  float temp = dht.readTemperature();
  float hum  = dht.readHumidity();

  if (!isnan(temp) && !isnan(hum)) {

    Serial.print(temp);
    Serial.print(",");
    Serial.println(hum);
  }

  delay(2000);
}