wifi trouble : pystack exhausted

[stanelie]

CircuitPython version

Adafruit CircuitPython 9.2.0 on 2024-10-28; Waveshare ESP32-S3-Zero with ESP32S3

Code/REPL

import wifi
import time

def connect_to_wifi():
    try:
        print(f"connecting wifi")
        wifi.radio.connect("my_ssid","my_password", timeout=5)
    except ConnectionError as e:
        print(f"{e} . Retrying...")
        time.sleep(1)
        connect_to_wifi()
        
connect_to_wifi()

Behavior

When trying to connect to a nonexistent access point, the ESP32 device will eventually crash after a minute or two with the following error message :
RuntimeError: pystack exhausted

I would like the ESP32 to keep trying until it can connect, and not crash.

Description

No response

Additional information

No response

[stanelie]

Nevermind :
This is a recursion problem, with the connect_to_wifi() launching itself. My bad.

A way to do it that doesn't crash :

import wifi
import time

def connect_to_wifi():
    try:
        print(f"connecting wifi")
        wifi.radio.connect("sticks","patateaufour")
    except ConnectionError as e:
        print(f"{e} . Retrying...")
        time.sleep(1)
        
while True:
    if wifi.radio.connected:
        print("connected!")
    else:
        connect_to_wifi()

Is there a better way? I would like to embed the reconnect inside of the connect_to_wifi() def.

[anecdata]

you could do while not wifi.radio.connected: inside the function, and add some time limit or other exit trigger to the conditional if desired so that it's not an infinite loop (otoh, it may not make sense to proceed unless there is a connection)

[stanelie]

Thanks for the tip, I will try that! Cheers!

[stanelie]

Yup, that works great! Thanks again!