ConfigOnSwitch example flawed?

[marcelstoer]

I think your ConfigOnSwitch example might be flawed but I cannot be exactly sure (yet). The issue is that if the device cannot connect to one of the configured WiFi networks it keeps looping ignoring that pressed button to start the config portal.

I took your example and simplified it for my needs:

• remove the ESP8266/ESP32 if-defs as I only need ESP32
• remove the features I don't need
• refactored duplicated code into dedicated functions
• put all code into a wifimanager.h that I can use from my main setup()/loop()

-> see Gist https://gist.github.com/marcelstoer/914ff2ac58a42a957dfa071c9c5c8acd -> use as below

void setup() {
  Serial.begin(115200);

  initWifiManager(String(deviceId));
  log_i("WiFi manager initialized.");
}

void loop() {
  // check button status here (to see if to start config portal)

  // internally checks WiFi connectivity in an interval i.e. not necessarily every time you call
  // this function
  checkWifiStatus();

  // app functions go here
}

As far as I understand the problem is the while-loop in connectMultiWiFi() at https://github.com/khoih-prog/ESPAsync_WiFiManager/blob/master/examples/Async_ConfigOnSwitch/Async_ConfigOnSwitch.ino#L388.

The function sequence is like this: loop() -> check_status() -> check_WiFi() -> connectMultiWiFi(). While trying to connect to one of the WiFis in that while-loop pressing the button to start the config portal has no effect! You would have to press the button for a really long time until the loop ends, the sequence above returns to loop() and the button status is evaluated again.

[khoih-prog]

Thanks again for your interest in the library and your nice and clean code. The library's examples are normally over-crowded with too many definitions trying to demonstrate to as many use cases as possible.

The Async_ConfigOnSwitch example is just a simple example to demonstrate the ESPAsync_WiFiManager library's feature and certainly can not be expected to be perfect in all use cases.

To make sure to enter the Config Portal whenever a button is pressed, it's suggested you use either

1. Interrupt for the button to change a flag, then use the flag to exit the WiFi while loop when the button is pressed.
2. Async_ConfigOnDoubleReset example

Please check these examples

1. ISR_Timer_4_Switches
2. ISR_Switch
3. SwitchDebounce

for how to use Button Interrupt in ESP8266/ESP32.