Update Super Racer Motherboard Firmware (BigTreeTech SKR 2.0)

There are two revisions of BigTreetech SKR 2.0 motherboards, one with an SMT32F407 processor called Rev A and the other with an SMT32F429 processor called Rev B:

SMT32F407 (Rev A)	SMT32F429 (Rev B)

It's important that your motherboard firmware version matches with the installed Klipper version.

Version is visible on System Loads tile -> mcu section (in Machine tab).

To update firmware, follow these instructions:

• In the SSH command prompt window, enter the following commands (one at a time):

  cd ~/klipper/
  

  make menuconfig
  

• Move on the menu with the Up and Down keys of your keyboard and validate the selected item with the Enter key and select these settings for BigTreeTech SKR 2.0 Rev A (STM32F407):

• Move on the menu with the Up and Down keys of your keyboard and validate the selected item with the Enter key and select these settings for BigTreeTech SKR 2.0 Rev B (STM32F429):

• Then on your keyboard press the Q key then Y to save configuration.

• Enter the following commands to compile firmware (one at a time):

  make clean
  

  make
  

• Get the firmware named klipper.bin in /home/pi/klipper/out/ directory (on the left part of MobaXterm).

• Rename it to firmware.bin and copy it to the root of an microSD card formatted in FAT32 and an allocation size of 4096. Use a small size like 128MB or 256MB for microSD because some motherboards do not support microSD with large capacity for flash.

• Insert the microSD card into the motherboard then turn on the printer.

• Installation only takes a few seconds, to verify that the firmware has been successfully installed, the file on the microSD card must have been renamed to FIRMWARE.BIN.CUR.