How to modify an sdkconfig option in Arduino?

Arduino-esp32 project is based on ESP-IDF. While ESP-IDF supports configuration of various compile-time options (known as “Kconfig options” or “sdkconfig options”) via a “menuconfig” tool, this feature is not available in Arduino IDE.

To use the arduino-esp32 core with a modified sdkconfig option, you need to use ESP-IDF to compile Arduino libraries. Please seeArduino as an ESP-IDF component andLibrary Builder for the two solutions available.

Note that modifyingsdkconfig orsdkconfig.h files found in the arduino-esp32 project treedoes not result in changes to these options. This is because ESP-IDF libraries are included into the arduino-esp32 project tree as pre-built libraries.

How to compile libs with different debug level?

The short answer isesp32-arduino-lib-builder/configs/defconfig.common:44. A guide explaining the process can be found here <guides/core_debug>