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tip
  • SB2040 V3 comes with pre-installed Katapult firmware for CAN connection at a rate of 1M
  • The Katapult firmware for SB2040 V3 CAN connection has rates of 500K and 1M; you can burn it yourself if needed
  • Katapult Firmware Burning

Firmware Burning Instructions

  • SB2040 V3 can connect to the host computer via RS232 or CAN
  • RS232 and CAN require the use of XT30(2+2)-F for connection
  • Below is the appearance of the XT30(2+2)-F data cable
Notice
  • The mainboard firmware burning needs to be done through Katapult to burn Klipper
  • If you are sure that the mainboard already has Katapult burned, you do not need to perform the final Katapult firmware burning, as that is just a precaution in case the Katapult firmware was not successfully burned onto the mainboard
  • You can quickly press the reset button twice to see if an LED on the mainboard blinks; if it does, it means the mainboard has entered the Katapult firmware

How to Determine Which Firmware You Need​

  • SB2040 V3 can connect to the host computer in the following ways
  • CAN Firmware Burning
    • Advantages: If you burn the Katapult firmware, you can update the firmware without touching the motherboard and it supports bus connections
    • Disadvantages: May cause timeouts or other errors when used with KlipperScreen
    • Note: If you need to use CAN, ensure that your host computer supports CAN and that it is paired with UTOC or a motherboard with bridging firmware
  • RS232 Firmware Burning
    • Advantages: No special software required, reliable and stable communication
    • Disadvantages: To re-burn the firmware, you need to enter manual DFU mode or double-click RST to enter Katapult to update the firmware
    • Note: Requires pairing with G2T or UTOR

Katapult Firmware Instructions​

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.