I think that's not a real option, format error?

Try changing port number and/or pins below that

Thanks for sharing your project. More info here:
https://github.com/ExploreEmbedded/

No I mean the port the at interface uses

https://github.com/espressif/esp32-at/b ... faults#L44

You may need to reconfigure serial port to use uart 0 via menuconfig if you are trying to use at commands over USB port.

Did you try ttyUSB1

I think SD_xxx are actually slave pin designation. But HS1 is master and is also the same pins. So the answer is use HS2 instead or wait for support of SD card in parallel with main flash, but with reduced performance.

Mistake here for reference:
https://github.com/espressif/esp-idf/bl ... ups.h#L527

Do you have the latest IDF with the patch you linked above?

Maybe just convince botbot.me to add it or use their open source code.