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Tip
  • SHT36 PRO comes pre-flashed with Katapult firmware for CAN connection at a rate of 1M
  • The Katapult firmware rate for SHT36 PRO CAN connection supports 500K and 1M; you can flash it yourself if needed
  • Katapult Firmware Flashing

Firmware Flashing Instructions

  • SHT36 PRO can be connected to the host via CAN connection
  • CAN connection requires the use of XT30(2+2)-F
  • Below is the style of the XT30(2+2)-F data cable
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Notes
  • Flashing firmware on the motherboard requires using Katapult to flash Klipper
  • If you have confirmed that the motherboard has already been flashed with Katapult, there is no need to flash the Katapult firmware at the end

CAN Firmware Compilation​

  • SHT36 PRO can only be connected to the host via CAN
  • CAN Firmware Flashing
    • Advantage: If the Katapult firmware has been flashed, firmware updates can be performed without touching the motherboard, and bus connection is supported
    • Disadvantage: When used together with KlipperScreen, it may cause errors such as homing timeout
    • Note: If you need to use CAN, ensure that the host supports CAN, and it requires a UTOC or a motherboard flashed with bridge firmware

Katapult Firmware Description​

Name Explanation

Katapult was formerly known as CanBoot, and both names may appear simultaneously in older tutorials or firmware names.

Katapult is a bootloader used to boot and update Klipper:

  • Katapult itself cannot be used as a Klipper MCU; after flashing, you still need to write Klipper firmware that matches the hardware and communication method.
  • Supported tool boards can enter Katapult by quickly double-pressing the RESET button; after entering, there is usually a status light blinking.
  • CAN, RS232, and USB use independent Katapult firmware; you cannot simply modify file names or mix them directly.
  • For CAN firmware, you must also select the correct bus speed, with common speeds being 500K and 1M.
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