Skip to main content
tip
  • The SB2040 PRO comes pre-flashed with Katapult firmware for CAN connection, with a rate of 1M
  • The Katapult firmware for CAN connection on the SB2040 PRO has rates of 500K and 1M, which can be flashed manually if needed
  • Katapult Firmware Flashing

Firmware Flashing Instructions

  • The SB2040 PRO can connect to the host machine via CAN
  • CAN requires the use of XT30(2+2)-F for connection
  • Below is the style of the XT30(2+2)-F data cable
Note
  • The motherboard firmware must be flashed with Klipper through Katapult
  • If it is confirmed that the motherboard has already been flashed with Katapult, there is no need to perform the final Katapult firmware flashing, which is only a precaution in case the Katapult firmware was not successfully flashed
  • You can quickly press the reset button twice to see if an LED on the motherboard starts blinking, indicating that the motherboard has entered the Katapult firmware

How to Determine Which Firmware You Need​

  • The SB2040 PRO can connect to the host machine in the following ways
  • CAN Firmware
    • Benefits: If the Katapult firmware is flashed, firmware updates can be performed without touching the motherboard, and it supports bus connection
    • Drawbacks: Might cause homing timeout errors when used with KlipperScreen.
    • Tip: If you need to use CAN, ensure the host machine supports CAN and requires UTOC or a motherboard flashed with bridging firmware

Katapult Firmware Description​

  • The SB2040 PRO comes with Katapult firmware for CAN connection at a rate of 1M by default
tip

Katapult was originally named CanBoot and was later renamed.

  • Katapult firmware is a type of bootloader that can be used in conjunction with Klipper. After being flashed using methods like DFU, you can use commands to update the firmware in one click.
  • Advantages: Double resetting or quickly cutting power twice will enter the Katapult firmware, and the pre-configured LED will flash; if not configured, it won't flash.
  • The Katapult firmware can only be used for flashing firmware and cannot connect to Klipper!!!
  • There are three ways to connect the Katapult firmware to the host machine:
    • CAN connection
      • Advantages: After compiling the KLIPPER firmware, you can directly update the firmware using commands.
      • Disadvantages: You need to know the firmware compilation rate in advance.
    • RS232 connection
      • Advantages: After compiling the KLIPPER firmware, you can update the firmware using commands.
      • Disadvantages: You cannot update the firmware in one click using commands; you need to manually enter the Katapult firmware.
    • USB connection
      • Advantages: After compiling the KLIPPER firmware, you can directly update the firmware using commands.