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Tip
  • SHT36 V2 provides Katapult firmware for both USB and CAN connections, which can be flashed as needed.
  • Katapult Firmware Flashing
  • SHT36 V2 is pre-flashed with CAN-connected Katapult firmware at a baud rate of 1M.
Notes

Firmware Flashing Instructions

  • Both firmware compilation and flashing require a host computer.
  • SHT36 V2 can be connected to the host computer via CAN.
  • CAN connection requires the use of XT30(2+2)-F.
  • Below is the appearance of the XT30(2+2)-F data cable:
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Important
  • Flashing the mainboard firmware requires flashing Klipper via Katapult.
  • If you are certain that the mainboard has already been flashed with Katapult, there is no need to proceed with flashing the Katapult firmware at the end.

CAN Firmware Compilation​

  • SHT36 V2 can only connect to the host computer via CAN.
  • For STM 103: see 103 CAN Firmware Flashing
  • For APM 072 and STM 072: see 072 CAN Firmware Flashing

Katapult Firmware Explanation​

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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