My falut, i was attempting to change the mode during an ISR. The ISR was marked with IRAM_ATTR and called a function containing WiFi.mode(STA) which was not marked with IRAM_ATTR. Apparently any function called from a function marked by IRAM_ATTR also needs to be marked with IRAM_ATTR. As stated in ...

d12 needs to be left open or pulled low at start up assuming your powering your board with 3.3v
I would imagine the input of the converter it connects to must be hi z so that should be ok.

read about all the strapping pins here:
https://github.com/espressif/esptool/wi ... -Selection

This thread on github indicates that i should be able to disable the AP by simply changing the mode to WIFI_MODE_STA https://github.com/espressif/esp-idf/issues/2433 Only when i try doing that i get the error below, and my board reboots. WiFi.mode(WIFI_MODE_STA); In fact, doing any of these things s...