Hi,

I've been attempting to make a minimum build configuration for the ESP32-S2 so we can just test a single device. Basically what I'm trying to do is get UART up and running and some driver (say, SPI) and then remove everything else from the build so that I can iterate development more quickly ...

Well, for anyone else bumping into this. The issue was that lwip_recv callbacks need to do a pbuf_free. The stack traces just make this confusing.

Anyways, problem solved.

For the record, this leak consistently occurs when we accept a connection with LWIP, do some send/recv operations on the socket and then close it (close / abort). We then wait for a few seconds for TCP FIN to occur before checking the heap status, and find that 1.6 KB is gone.

We can reproduce the ...

Hi,

We're using LWIP to do async TCP/IP connections. During the development, we've found two memory leaks that we cannot explain; one of them roughly 16 bytes, the other one roughly 1.6 KB

Here are the relevant stack traces:

Lost ptr=3FFE43B8 size=1696
heap_caps_malloc_base
C:/Espressif ...

First off, thank you for the very informative reply!

I assume you advice that we never initialize the wifi stack to ensure that the IC won't be damaged. From your comment I also assume that not initializing it means that the LNA_IN/RF pin won't be used at all (until `coax_init` is called I suppose ...

Hi there,

I've been wondering for some time now how I can make an ESP32-S2 module without any WiFi functionality. I have some real life applications for this.

https://www.espressif.com/sites/default/files/documentation/esp32-s2_hardware_design_guidelines_en.pdf gives an overview of the hardware ...