Tip

• The SHT36 LIS3DH comes pre-flashed from the factory with Katapult firmware for CAN connection at a rate of 1M
• The Katapult firmware for SHT36 LIS3DH CAN connection supports rates of 500K and 1M, and can be re-flashed as needed
• Katapult Firmware Flashing

Firmware Flashing Instructions

• The SHT36 LIS3DH can only connect to the host computer via CAN connection
• CAN requires using an XT30(2+2)-F connector
• Below is the style of the XT30(2+2)-F data cable
  Loading...

Important Notes

• Mainboard firmware flashing requires using Katapult to flash Klipper
• If you are sure the mainboard already has Katapult flashed, there is no need to proceed with the final Flashing Katapult Firmware section

How to Determine Which Firmware You Need

• The SHT36 LIS3DH can be connected to the host computer using the following method
• CAN Firmware Flashing
  • Advantages: If Katapult firmware is flashed, firmware updates can be performed without touching the mainboard, and it supports bus connection
  • Disadvantages: When used together with KlipperScreen, errors such as homing timeout may occur
  • Note: If you need to use CAN, ensure the host computer supports CAN and requires the use of a UTOC or a mainboard 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.