New joint DHT11/DHT22 module

changes to module DHT22:

....
  setTimeout(function() {

    pinMode(D5,'output');digitalPulse(D5, 0, 1) // fire a 1ms  marker 

    clearWatch(ht.watch);
    delete ht.watch;
....
    }
  },6);
};
....

sample DHT22 code:

E.on("init",function(){

  dht = require("DHT22").connect(D4);

  setInterval(function(){
    dht.read(function (a) { 
      console.log("t = "+a.temp.toFixed(1).toString()
                  +", rh = "+a.rh.toFixed(1).toString()
                  //+"\nraw:"+a.raw+
                  //+"\nerr:"+a.err+
                  //+", cse:"+a.checksumError
                 );},
      1);

  },2000);
});

save();

output is -1 for both value, changing 6 to 30 I receive correct values.

plus logic analyzer screen shot "001.jpg" of on dht.read

Question: why is the marker fired so late ?

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