Where i wrong Connect DH11 - Temp is -1 and RH is -1

But result Temp is -1 and RH is -1

echo(1);
// Init ESP8266
var ESP8266 = require("ESP8266");
ESP8266.setLog(2);
ESP8266.printLog();  
E.setClock(80);

var dht = require("DHT11").connect(D14); //GPIO14 NodeMCU is pin D5

//setWatch(function(e){
//  console.log(e.time - e.lastTime);
//}, D14, {repeat: true, edge:"both"});

var dht2 = function(){
  dht.read(
    function(a){
      
      console.log("Temp is "+a.temp.toString()+" and RH is "+a.rh.toString());

  });
  return true;
};

dht2();