Try building it again but changing CONFIG_STM32_SERIAL_USART3=y to CONFIG_STM32_USB_PA11_PA12=y
I can’t be certain because I was to the point of trial and error and may have changed the makeconfig before I realized the current build had worked, but it’s worth a shot. I couldn’t get anything else to work, including Arketype’s build. I also had to use /dev/serial/by-id instead of by-path
The bin attached is the one that worked - I just can’t be certain about the current makeconfig
Also included my printer.cfg in case anything in it is useful.
klipper.zip (22.3 KB)