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tip
  • SHT36/42 are not pre-flashed with CAN-connected Katapult firmware at the factory
  • SHT36/42 CAN-connected Katapult firmware has two speeds: 500K and 1M, which can be burned if needed
  • Katapult Firmware Burning

Firmware Burning Instructions

  • SHT36/42 can be connected to the host computer via CAN connection
  • CAN requires the use of MX3.0 metal terminal crimping

How to Determine Which Firmware You Need​

  • SHT36/42 can be connected to the host computer in CAM mode
  • CAN Firmware Burning
    • Advantage: If Katapult firmware is burned, the firmware can be updated without touching the motherboard, and bus connection is supported
    • Disadvantage: Using KlipperScreen together may cause homing timeout and other errors.
    • Tip: If CAN is needed, please make sure the host computer supports CAN, and it needs to be used with UTOC or a motherboard with bridging firmware burned

Katapult Firmware Description​

tip

Katapult was originally named CanBoot, and later renamed to katapult.

  • Katapult firmware is a type of bootloader that can be used in conjunction with Klipper. After burning the firmware using methods like DFU, you can use commands to update the firmware with one click.
  • Advantage: Quickly double-clicking the reset button or quickly cutting power twice will enter the Katapult firmware, at which point there will be an LED flashing on the mainboard.
  • Katapult firmware can only be used to burn firmware and cannot connect to Klipper!!!
  • Katapult firmware supports three connection methods for connecting to the host computer, and the firmwares for these three methods are independent of each other.
    • CAN connection
      • Advantage: After compiling the KLIPPER firmware, you can directly update the firmware using a command, and it has strong interference resistance.
      • Disadvantage: You need to know the firmware compilation rate in advance.
    • RS232 connection
      • Advantage: After compiling the KLIPPER firmware, you can update the firmware using a command, and it has very strong interference resistance.
      • Disadvantage: You cannot use a command to update the firmware with one click; you need to manually enter the Katapult firmware.
    • USB connection
      • Advantage: After compiling the KLIPPER firmware, you can directly update the firmware using a command.
      • Disadvantage: A long data cable is prone to interference, which may lead to disconnection.