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Tip
  • SHT36/42 does not come pre-flashed with Katapult firmware for CAN connection
  • The Katapult firmware for SHT36/42 CAN connection supports rates of 500K and 1M, and can be flashed as needed
  • Flash Katapult Firmware

Firmware Flashing Instructions

  • SHT36/42 can be connected to the host via CAN connection
  • CAN requires the use of MX3.0 metal terminal crimping
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How to Determine Which Firmware You Need​

  • SHT36/42 can connect to the host via CAN
  • Flash CAN Firmware
    • Advantages: If the Katapult firmware is flashed, the firmware can be updated without touching the motherboard, and bus connection is supported
    • Disadvantages: Using it with KlipperScreen may cause errors such as homing timeout
    • Tip: If you need to use CAN, ensure that the host supports CAN, and you need to use a UTOC or a motherboard flashed with bridge firmware

Katapult Firmware Instructions​

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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