code: function Dht(board, pin) {
      Module.call(this);
  
      this._type = 'DHT11';
      this._board = board;
      this._pin = pin;
      this._humidity = null;
      this._temperature = null;
      this._lastRecv = null;
      this._readTimer = null;
      this._readCallback = function () {};
  
      this._board.on(BoardEvent.BEFOREDISCONNECT, this.stopRead.bind(this));
      this._messageHandler = onMessage.bind(this);
      this._board.on(BoardEvent.ERROR, this.stopRead.bind(this));
    }
docs: The Dht Class.
  
  DHT is sensor for measuring temperature and humidity.
  
  @namespace webduino.module
  @class Dht
  @constructor
  @param {webduino.Board} board The board that the DHT is attached to.
  @param {Integer} pin The pin that the DHT is connected to.
  @extends webduino.Module