RF bridge support question about ewelink-api HOT 4 OPEN

var express = require('express'); 
var hostname = 'localhost'; 
var portServer = 6005;
var app = express(); 
const ewelink = require('ewelink-api');
var request = require('request');

 const socket = await connection.openWebSocket
      (
        async data => 
        {
 app.get('/sync', function(req, res) 
          {
            ( async () => 
                {
                  var device_id = DEVICEID;
                  var apikey = APIKEY;
                  var channel = RFCHL;

                    const timeStamp = new Date() / 1000;
                    const sequence = Math.floor(timeStamp * 1000);
                    var payload = {};
                    payload.action = 'update';
                    payload.userAgent = 'app';
                    payload.apikey = '' + apikey;
                    payload.deviceid = '' + device_id;
                    payload.sequence = '' + sequence;
                  payload.params = {};
                  payload.params.cmd = 'transmit';
                  payload.params.rfChl = channel;
                    var string = JSON.stringify(payload);
                    socket.send(string);
                }
 )();
          });   
)();

var server = app.listen(portServer, hostname, function()
    {
      var date = new Date();
      console.log("Serveur correctement lancé sur http://"+ hostname +":"+ portServer + " Le " + date); 
    });