Tip

• The SHT36 PRO comes pre-flashed with Katapult firmware for CAN connection at a rate of 1M.
• The SHT36 PRO CAN-connected Katapult firmware is available in 500K and 1M rates, and you can flash it yourself if needed.
• Katapult firmware flashing

Firmware Flashing Instructions

• The SHT36 PRO can be connected to the host via CAN.

• CAN requires a XT30(2+2)-F connection.

• Below is the XT30(2+2)-F data cable style.

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Notes

• The mainboard firmware needs to be flashed with Klipper via Katapult.
• If you confirm that Katapult is already flashed on the mainboard, there is no need to flash the Katapult firmware again at the end.

Selecting the Firmware Type

Please confirm the connection method first.

• The SHT36 Pro can only be connected to the host via CAN.
• If a CAN toolboard is required: please select CAN firmware.

Firmware Type	Applicable Scenario	Advantages	Confirm Before Selecting	Operation
CAN Firmware	When a CAN toolboard is required	Supports connecting multiple devices via the CAN bus	Confirm that the host supports CAN and prepare a UTOC or USB-CAN bridge board	Compile CAN Firmware

Katapult Firmware Notes

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.