ESP32 WIFI event: post event to user fail!

[espruino-discuss3]

Posted at 2020-03-11 by Stenya

Task: control the LED on the board using a browser.
Device: ESP32 WROOM DevKit v1, firmware from the espruino_2v04_esp32 folder.
Work in the Espruino Web IDE for Windows 64 bit - 0.72.1.
The code:

var wifi = require('Wifi');
var http = require('http');
var ssid = 'Point';
var password = '12345678';
var port = 80;

function apiRequest(req, res) {
  console.log('apiRequest start');
  var a = url.parse(req.url, true);
  console.log("PATH: ", a.pathname, "METHOD", req.method);
  if (req.method === "POST") {
    switch(a.pathname) {
      case '/setLed':
        var data = "";
        req.on('data', (d)=> { data = d; });
        req.on('end',  ()=> {
          console.log('START Post setLed', data);
          digitalWrite(D2, data === 'true' ? true : false);
          res.writeHead(200);
          res.end();
          console.log('END Post setLed');
        });
        break;
    }
  }
}

function onInit() {
  digitalWrite(D2, false);
  setTimeout(connectWifi, 1000);
  wifi.on('disconnected', ()=> {
    console.log('WIFI disconnected');
  });
  wifi.on('connected', ()=> {
    console.log('WIFI connected');
  }); 
}

function connectWifi() {
  console.log('WIFI connecting...');
  wifi.connect(ssid, {password: password}, (err)=> {
    if(err) console.log(err);
    else {
      http.createServer(apiRequest).listen(port);
      console.log(`Web server running at http://${wifi.getIP().ip}:${port}`);
    } 
  });
}

onInit();

I make a request to the server with the web app and the script works (the LED lights up / goes out)

In console:

 ____                 _
|  __|___ ___ ___ _ _|_|___ ___
|  __|_ -| . |  _| | | |   | . |
|____|___|  _|_| |___|_|_|_|___|
         |_| espruino.com
 2v04 (c) 2019 G.Williams
Espruino is Open Source. Our work is supported
only by sales of official boards and donations:
http://espruino.com/Donate
>
WIFI connecting...
ERROR: Wifi: event_handler STA_START: esp_wifi_connect: 12298(SSID is invalid)
WARNING: Wifi:startMDNS - espressif
Web server running at http://172.22.50.110:80
WIFI connected     //First connect
apiRequest start   // First request
PATH:  /setLed METHOD POST
START Post setLed true
END Post setLed
>E (27443) event: post event to user fail!
WARNING: Wifi:startMDNS - espressif
WARNING: Wifi:stopMDNS
WIFI connected   // Second connect. 

After second connect, sometimes I can do second reqest, sometimes the device freezes
p.s. I read post

http://forum.espruino.com/comments/15068150/