Warning message "wifi:m f null"

[bradkeifer]

Hi,
I am developing a project using esp-idf v4.4.2. My use case has mobile esp32 devices, connected via a mesh network and using mqtt to send information collected at the esp32 devices to a mqtt broker on the internet. My esp32 devices will have a LCD display, a camera to decode QR codes and digital inputs.

I have used the Internal Communication example project, see https://github.com/espressif/esp-idf/tr ... munication, as the basis to build my app. I have the example project working well (although haven't tested the self organisation features yet).

However, as soon as I introduce code to support the camera, I start getting the warning message

Code: Select all

wifi:m f null

several minutes after the app starts. This occurs even if I only ever run the camera initialisation code and never try to make use of the camera in the normal running of my code. The camera is an OV2620 camera and I am using the esp32-camera driver, see https://github.com/espressif/esp32-camera

I suspect that my issue is memory related, but I don't know if the root cause is a memory configuration issue or a code issue caused by my camera initialisation code or the esp32-camera driver.

If I can understand what the warning message is, then perhaps I can set off in the right direction to find and fix the root cause.

Anyone have any idea what this warning message means or how I should go about finding the root cause?

PS: I have elected to not use esp-mdf as the basis for my project as there has been no recent activity in the git repo for it and I assume it is no longer under active development. If this is a wrong assumption, and you think I should consider using it, I would love to hear so along with your rationale.

Many thanks in advance.