Implement wifi connecting timeout on ESP32?

Projects Programming
1

So here is the well-known WiFi connection code:

  if (WiFi.status() != WL_CONNECTED) {
    WiFi.begin(ssid, pass);
  }

  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
   }
  Serial.print("Connected...");

The problem is if it can't connect to the hotspot for some reason, it will end up in an infinite while loop. I was thinking on some solution with the millis() function, but then I found the WiFi.waitForConnectResult() fuction and I came up with this:

  if (WiFi.status() != WL_CONNECTED) {
    WiFi.begin(ssid, pass);
  }

  if (WiFi.waitForConnectResult() == WL_CONNECTED) {
    Serial.println("connected");
  } 
    else {
    Serial.println("not connected");
  }

Is this a good solution, to avoid infinite loop? If the ESP can't connect, it still can do the other things which does not need WiFi.

2

esp32 wifi api Networking APIs - ESP32 - — ESP-IDF Programming Guide latest documentation

3

Sure. If you look at the code for waitForConnectionResult, it is basically trying to connect 100 times with 100 msec delay in between so you get a timeout of ~10 seconds

4

I see, however a did a small experiment, I intentionally gave a wrong ssid, so it could not connect anyway. But the "timeout" did not take 10 secs, only about 2-3, then my code printed "not connected". How is that possible?

5

Look at the code. You have the source code right there on your PC. If any attempt returns an error, it does not keep trying