c2mw4 wrote on February 04, 2020:
Thanks Tiangang,
It turned out I had another bug that appeared to make sdkconfig.default not work properly. Thanks to your clear and specific explanation I re-focused away from sdkconfig, found my bug, and now working 
I was using example console source from ESP-IDF 4+ which used eg CONFIG_ESP_CONSOLE_UART_BAUDRATE, while CONFIG_CONSOLE_UART_BAUDRATE was defined in sdkconfig – my eyes tricked me by completely overlooking the ESP so I mistakenly thought sdkconfig wasn't working. ESP-IDF 4+ includes the renaming function for sdkconfig variables that makes those two equivalent for backward compatibility, but of course renaming isn't present in AFR-ESP32 (IDF 3).
Is there a timetable for migrating AFR-ESP32 to the latest ESP32 IDF?
Thanks again and cheers,
/george