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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​

Tip

Katapult was originally named CanBoot and later renamed to katapult.

  • The Katapult firmware is a type of bootloader that can be used together with Klipper. After flashing via DFU or other methods, firmware can be updated with a single command.
  • Advantages: Quickly double-click the reset button or power cycle twice to enter the Katapult firmware, at which point the LED on the motherboard will blink.
  • Katapult firmware can only be used to flash firmware and cannot connect to Klipper!!!
  • Katapult firmware supports three ways to connect to the host computer, and the firmware for each method is independent.
    • CAN connection
      • Advantages: After compiling the Klipper firmware, it can be updated directly using commands, with strong anti-interference capability.
      • Disadvantages: The firmware compilation speed needs to be known in advance.
    • RS232 connection
      • Advantages: After compiling the Klipper firmware, it can be updated using commands, with very strong anti-interference capability.
      • Disadvantages: Firmware cannot be updated with a single command; manual entry into Katapult firmware is required.
    • USB connection
      • Advantages: After compiling the Klipper firmware, it can be updated directly using commands.
      • Disadvantages: Long data cables are prone to interference, which may cause disconnection.
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