espruino-cors.js

function onPageRequest(req, res) {
  
  res.writeHead(200, {
    'Content-Type': 'application/json',
    "Access-Control-Allow-Origin": "*"
  });
  
  res.end(JSON.stringify(
    {
     moisture : percentage()
    }
  ));
  
  
}

temp.js

var pin = NodeMCU.D2;


var dht = require("DHT22").connect(pin);

var data = {};


setInterval( () =>{
  
  dht.read(function (a) {
   data.temperature = a.temp;
   data.humidity = a.rh;
 });
  
  
  console.log(
    'Temperature is : ', data.temperature,
    'Humidity is : ',data.humidity
  );
  

},5000);



function onPageRequest(req, res) {
  res.writeHead(200, {
    'Content-Type': 'application/json',
    'Access-Control-Allow-Origin': '*'
  });
  
  res.end(JSON.stringify(data));

}


function onInit(){
  
  require("http").createServer(onPageRequest).listen(80);
  
}



onInit();

save();