Hello @holofloh cool, glad it worked. Thanks Felix

Please read in the documentation of that expansion module: https://docs.m5stack.com/en/module/extport_for_core2 the section "PinMap" will explain it all. In the section "Schematic" you see how it is done.

you need to configure you wifi in code. at least a wifi connect has to be set in the beginning of your code to use the wifi configured in firmware.