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tip
  • The SHT36 V3 is shipped with the Katapult firmware connected via CAN at a rate of 1M.
  • The Katapult firmware connected via CAN on the SHT36 V3 has rates of 500K and 1M; it can be burned independently if needed.
  • Katapult Firmware Burning

Firmware Burning Instructions

  • Both firmware compilation and burning require an upper computer.
  • The SHT36 V3 can connect to the upper computer via RS232 or CAN.
  • RS232 and CAN need to use XT30(2+2)-F for connection.
  • Below is the appearance of the XT30(2+2)-F data cable:
Notice
  • The mainboard firmware burning needs to burn Klipper through Katapult.
  • If you are sure that the mainboard has already been burned with Katapult, there is no need to perform the last Katapult firmware burning, as that is just a precaution in case the Katapult firmware burning on the mainboard was unsuccessful.
  • You can quickly press the reset button twice to see if a LED on the mainboard flashes; if so, it indicates that the mainboard has entered the Katapult firmware.

How to Determine Which Firmware You Need​

  • The SHT36 V3 can connect to the upper computer using the following methods:
  • CAN Firmware
    • Advantage: After burning the Katapult firmware, the firmware can be updated without touching the mainboard, and it supports bus connections.
    • Disadvantage: There may be errors such as homing timeouts when using KlipperScreen together.
    • Tip: If you need to use CAN, ensure that the upper computer supports CAN and pair it with UTOC or a mainboard flashed with bridge firmware.
  • RS232 Firmware
    • Advantage: No special software is required; communication is reliable and stable.
    • Disadvantage: Re-flashing the firmware requires entering manual DFU mode or double-clicking RST to enter Katapult to update the firmware.
    • Tip: It needs to be paired with G2T or UTOR to function.

Katapult Firmware Instructions​

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 burning the firmware using methods like DFU, you can use commands to update the firmware with one click.
  • Advantage: Quickly double-clicking the reset button or quickly cutting power twice will enter the Katapult firmware, at which point there will be an LED flashing on the mainboard.
  • Katapult firmware can only be used to burn firmware and cannot connect to Klipper!!!
  • Katapult firmware supports three connection methods for connecting to the host computer, and the firmwares for these three methods are independent of each other.
    • CAN connection
      • Advantage: After compiling the KLIPPER firmware, you can directly update the firmware using a command, and it has strong interference resistance.
      • Disadvantage: You need to know the firmware compilation rate in advance.
    • RS232 connection
      • Advantage: After compiling the KLIPPER firmware, you can update the firmware using a command, and it has very strong interference resistance.
      • Disadvantage: You cannot use a command to update the firmware with one click; you need to manually enter the Katapult firmware.
    • USB connection
      • Advantage: After compiling the KLIPPER firmware, you can directly update the firmware using a command.
      • Disadvantage: A long data cable is prone to interference, which may lead to disconnection.