How to compile the SDK with lwIP in debug mode?

[rzajac]

Hello, A beginner to C and ESP SDK here :) I would like to see debug messages which can be helpful while getting to know how exactly TCP stack works. Thanks!

[st0ff3r]

edit esp-open-lwip/include/lwipopts.h:

make sure it contains

#define LWIP_DEBUG 1 #define LWIP_DBG_TYPES_ON LWIP_DBG_ON

plus enable the debugging types you want like:

#define IP_DEBUG LWIP_DBG_ON

rebuild esp-open-sdk