// To use the sensor DHT11, 
// you need this libraries.
#include "DHT.h"
#define DHTPIN 5
#define DHTTYPE DHT11

// It initializes an object 
// to use the sensor
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  // put your setup code here, to run once:

  // It initializes the serial port
  Serial.begin(9600);

  // It initializes the sensor
  dht.begin();
}

void loop() {
  // put your main code here, to run repeatedly:

  // There is a small delay in order 
  // to give time to the sensor to 
  // read the next data.
  delay(1000);

  // It creates 2 floating variables
  // to read the data from the sensor
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  // If the sensor is not conected 
  // properly send a text to the 
  // serial port
  if (isnan(h) || isnan(t)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  // Send the data through the 
  // serial port
  Serial.print(h);
  Serial.print(",");
  Serial.println(t);
}