ESP32 memory leaks WIFI and MQTT

I guess there is a better way: Do not create new timer every 1000ms, but only once. Just to quote one function:

//get wifi status every second
function iw1() {
  wifi_stat = Wifi.getDetails().status;
  //set led blink rate
  if(wifi_stat !== "connected") {led_speed = 100;}
  else {led_speed=500;}
  setTimeout(iw1,1000);
}
iw1();

And how to do it better:

//get wifi status every second
function iw1() {
  wifi_stat = Wifi.getDetails().status;
  //set led blink rate
  if(wifi_stat !== "connected") {led_speed = 100;}
  else {led_speed=500;}
}
iw1();
setInterval(iw1,1000);

While there is a garbage collection, it might be called too late, or not working properly - I didn't look into it. But if you call setTimeout every 1000ms instead of setInterval once there's a really high chance it'll allocate a new block of memory for a new timer every 1000ms.
The other functions shall be modified accordingly.