ESP32 memory leaks WIFI and MQTT

You are reading a single comment by @Robin and its replies. Click here to read the full conversation.

•

dwinfiel

After flashing new firmware to the ESP32, disabling Bluetooth, saving my wifi settings using the following:

var ssid = 'xxxx'; 
var pswd = 'xxxx'; 
var wifi = require('Wifi');
wifi.stopAP();

wifi.connect(ssid, {password: pswd},function(){
//    console.log('Connected to Wifi.  IP address is:', wifi.getIP().ip);
    wifi.save(); // Next reboot will auto-connect
});

I get the following memory (after sending a ESP32.reboot):

>process.memory();
={ free: 4021, usage: 79, total: 4100, history: 0,
  gc: 0, gctime: 3.2 }

I found that my board does run the event wifi.on('disconnected',function()), at least sometimes. So I am trying the following code:

var wifi = require('Wifi');
var iwico = setInterval(wico,999999999);
wifi.stopAP();

wifi.on('disconnected',function(){
  //print("wifi disconnected");
  console.log('Wifi disconnected');
  clearInterval(iwico);
  iwico = setInterval(wico,1000*30);
  
});

wifi.on('connected',function(){
  //print("wifi connected");
  console.log('Connected to Wifi.  IP address is:', wifi.getIP().ip);
  clearInterval(iwico);
});


function wico() {
  console.log('trying to reconnect');
  wifi.restore();
}

function fmem() {
  free_mem = process.memory().free;
  print('free mem: ' + free_mem);
  setTimeout(fmem,1000);
}
fmem();

After performing a ESP32.reboot, I get the following:

>process.memory();
={ free: 3985, usage: 115, total: 4100, history: 0,
  gc: 0, gctime: 3.382 }
free mem: 3981

And as long as my Wifi doesn't disconnect it seems to stay steady at 3981. Shortly after I shut off my WIFI, I get a few error messages and then my memory drops to 3963. It continues to drop each time it tries to reconnect. After a couple of minutes, I turned my WIFI back on. Just before I turned it on the free memory was down to 3895. After it finished reconnecting it dropped more, down to:
3859.

Then it stays steady ad 3859. If I wait a few more minutes and turn off my WIFI again it doesn't seem to catch the change in WIFI status. If I manually type in wifi.getStatus(), I get the following

={
  station: "connected",
  ssid: "",
  bssid: "00:00:00:00:00:00",
  channel: 0, rssi: 0,
  htMode: "HT20",
  authMode: "wpa2",
  mode: "STA",
  powersave: "modem"
 }

For some reason my ssid is now deleted. Any idea why it does that? Maybe I'm shutting my WIFI off too quickly. If I turn my WIFI back on, it doesn't re-connect a second time. I'll set it to run overnight and see how much, if any memory loss I get if I don't manually shut off the WIFI.

•

Robin in reply to @dwinfiel

'After flashing new firmware to the ESP32'

Are we still at ver 2.04 ?

On a S.W.AG. hunch, try console.log() the value of 'iwico' to see if the handle is changing. Wondering if the call to setInterval() is gobbling up those bytes?

•

dwinfiel in reply to @Robin

Yes my version is 2.04. Would trying an older vesion help? Not sure what you want me to console.log(), if I just put that I get "=undefined". When I do >E.getSizeOf(global, 2), I get the following:

>E.getSizeOf(global, 2)
=[
  {
    name: "\xFF",
    size: 63,
    more: [
      {
        name: "timers",
        size: 12 },
      {
        name: "watches",
        size: 3 },
      {
        name: "net",
        size: 3 },
      {
        name: "modules",
        size: 15 },
      {
        name: "BLE_DEV_N",
        size: 4 },
      {
        name: "history",
        size: 24 }
     ]
   },
  {
    name: "wico",
    size: 4,
    more: [
      {
        name: "\xFFcod",
        size: 2 }
     ]
   },
  {
    name: "fmem",
    size: 4,
    more: [
      {
        name: "\xFFcod",
        size: 2 }
     ]
   },
  {
    name: "ssid",
    size: 2 },
  {
    name: "pswd",
    size: 3 },
  {
    name: "wifi",
    size: 12,
    more: [
      {
        name: "#ondisconnected",
        size: 5 },
      {
        name: "#onconnected",
        size: 5 }
     ]
   },
  {
    name: "iwico",
    size: 2 },
  {
    name: "process",
    size: 3,
    more: [  ]
   },
  {
    name: "free_mem",
    size: 2 },
  {
    name: "console",
    size: 3,
    more: [  ]
   },
  {
    name: "ReferenceError",
    size: 8,
    more: [
      {
        name: "prototype",
        size: 6 }
     ]
   },
  {
    name: "E",
    size: 2,
    more: [  ]
   }
 ]

There were not any memory loss during the night (WIFI probably didn't loose connection). Resetting it this morning dropped it from 3696 (what it dropped to after running a few commands such as the E.getSizeOf(global, 2)) to 3605 by the time it reconnected.

ESP32 memory leaks WIFI and MQTT

About

Espruino