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tip
  • The SHT36 LIS3DH comes pre-flashed with Katapult firmware for CAN connection at a rate of 1M.
  • The Katapult firmware for SHT36 LIS3DH CAN connection is available in both 500K and 1M rates. You can flash it yourself if needed.
  • Katapult Firmware Flashing

Firmware Flashing Instructions

  • The SHT36 LIS3DH can only connect to the host computer via CAN.
  • CAN connection requires using an XT30(2+2)-F cable.
  • Below is the style of the XT30(2+2)-F data cable.
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Important Notes
  • Flashing the mainboard firmware requires using Katapult to flash Klipper.
  • If you are certain that the mainboard already has Katapult flashed, you do not need to perform the final step of flashing the Katapult firmware.

How to Determine Which Firmware You Need​

  • The SHT36 LIS3DH can connect to the host computer using the following methods:
  • CAN Firmware Flashing
    • Advantages: If Katapult firmware is flashed, you can update the firmware without touching the mainboard, and it supports bus connections.
    • Disadvantages: Using it with KlipperScreen may cause errors such as homing timeouts.
    • Note: If you need to use CAN, ensure your host computer supports CAN and that you have a UTOC or a mainboard flashed with bridge firmware.

Katapult Firmware Explanation​

tip

Katapult was originally named CanBoot and later renamed to Katapult.

  • Katapult firmware is a type of bootloader that can be used in conjunction with Klipper. After flashing via methods like DFU, the firmware can be updated with a single command.
  • Advantages: Quickly double-click the reset button or power off twice in quick succession to enter Katapult firmware, at which point an LED on the motherboard will blink.
  • Katapult firmware can only be used to flash firmware and cannot connect to Klipper!!!
  • Katapult firmware supports three methods for connecting to the host computer, with each method's firmware being independent of the others:
    • CAN connection
      • Advantages: After compiling the Klipper firmware, it can be updated directly using commands, with strong anti-interference capability.
      • Disadvantages: Requires prior knowledge of the firmware's compiled baud rate.
    • RS232 connection
      • Advantages: After compiling the Klipper firmware, it can be updated using commands, with very strong anti-interference capability.
      • Disadvantages: Cannot update the firmware with a single command; requires manually entering Katapult firmware.
    • 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 disconnections.
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