ESP32 Forum

"STA is connecting, scan are not allowed!"

I would like to be able to do a scan without disconnecting an existing STA connection (which has an IP address) and doesn't appear to be logging any events to suggest there is a problem.

The occurrence seems random.

I cannot find good solutions on searching.

Looking for the string, it is in libnet80211.a so I cannot play with the source code to try to get it to return a useful event.

Any ideas on this welcomed. I just cannot find a way of detecting when this has occurred, no WiFi event is triggered, so I cannot disconnect and try again.

I can disconnect and a scan always works, but then I have disconnected most of the time without good reason.

Best solution I have found so far is to do esp_wifi_disconnect() before doing a scan, and esp_wifi_connect() after. A scanning event bit prevents attempted reconnections during the scan.

Javascript code in the served page starts reloading the page after a 3s delay if the IP address was not 192.168.4.1 so that if the page was served through the ESP32's STA IP address it can receive the scan results.

Any better ideas are welcomed.

The issue is likely related to this issue:
https://github.com/espressif/esp-idf/issues/2125

If that is the case, there is no fix (as I understand it).