DHT11 Sensor Module

#include <DHT.h>

#define DHTPIN 2
#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
  Serial.println("DHT11 sensor module example");
}

void loop() {
  delay(2000); // DHT11 needs a slow refresh rate

  float humidity = dht.readHumidity();
  float temperatureC = dht.readTemperature();

  if (isnan(humidity) || isnan(temperatureC)) {
    Serial.println("Failed to read from DHT11 sensor");
    return;
  }

  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.print(" %\tTemperature: ");
  Serial.print(temperatureC);
  Serial.println(" *C");
}