DHT11 Arduino Compatible Digital Temperature Humidity Sensor Module

- Sensor including resistive humidity sensing component
- Fast response, great anti-interference ability and durable
- Signal transmission range: 20m
- Power: 3.5-5V
- Temperature range: 0-50'C
- Humidity range: 20-90%RH

EXAMPLE CODE

ARD_DHT11_HCARDU0020_Example.pde

/* FILE:    ARD_DHT11_HCARDU0020_Example.pde
   DATE:    02/07/12
   VERSION: 0.1


This is a simple example of how to use the HobbyComponents Arduino DHT11 module
(HCARDU0020). The module will work with the Arduino DHT11 library available at 
http://arduino.cc/playground/Main/DHT11Lib without any modification. This code 
demonstrates the use of this library to output the current temperature and humidity
measured by the sensor.


You may copy, alter and reuse this code in any way you like but please leave 
reference to HobbyComponents.com in your comments if you redistribute this code. */



/* Include the DHT11 library available at http://arduino.cc/playground/Main/DHT11Lib */

#include <dht11.h>


dht11 DHT11;


/* Define the DIO pin that will be used to communicate with the sensor */

#define DHT11_DIO 2



void setup()

{

  /* Setup the serial port for displaying the output of the sensor */

  Serial.begin(9600);

}


/* Main program loop */
void loop()

{

  /* Perform a read of the sensor and check if data was read OK */

  if (DHT11.read(DHT11_DIO) == DHTLIB_OK)

  {

    /* If so then output the current temperature and humidity to 
    the serial port */

    Serial.print("Temperature: ");

    Serial.print((float)DHT11.temperature, 2);

    Serial.print("oC\t");

    Serial.print("Humidity: ");

    Serial.print((float)DHT11.humidity, 2);

    Serial.println("%");

  }else

  {

    /* If there was a problem reading from then sensor then output 
    an error */

    Serial.println("ERROR");

  }

  

  delay(500);

}