Got my new Simucube programmed now, with the SimuCube Configurator tool, now the Firmware update wizard starts.
The USB cable is on X3.
Just for my General understanding, when do I use USB X3, and when X4.
There are 2 µP on the board, the main STM32F407, and a smaller STM32F103.
I guess X3 connects to STMF407?
When updating, do I always use X3?, the bootloader was on X4.