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tip
  • SHT36 V3 ships with Katapult firmware pre-flashed for CAN connection at a rate of 1M
  • The Katapult firmware for SHT36 V3 connected via CAN has rates of 500K and 1M; you can flash it yourself if needed
  • Burning Katapult Firmware

Firmware Burning Instructions

  • Both firmware compilation and burning require the use of an upper-level machine
  • SHT36 V3 can connect to the upper-level machine via RS232 or CAN
  • RS232 and CAN connections require the use of XT30(2+2)-F cable
  • Below is the image of the XT30(2+2)-F data cable
Notice
  • Mainboard firmware burning requires flashing Klipper through Katapult
  • If you are sure that the mainboard already has Katapult flashed, you do not need to perform the final step of flashing Katapult firmware; this is just a precaution in case the Katapult firmware on the mainboard was not flashed successfully
  • You can quickly press the reset button twice to see if a LED on the mainboard blinks; if it does, it indicates that the mainboard has entered Katapult firmware

How to Determine Which Firmware You Need​

  • SHT36 V3 can connect to the upper-level machine using the following methods
  • CAN Firmware
    • Advantages: If you flash the Katapult firmware, you can update the firmware without touching the mainboard and it supports bus connections
    • Disadvantages: Using KlipperScreen together might cause timeout errors during homing
    • Note: If you need to use CAN, ensure your upper-level machine supports CAN and use it with UTOC or a mainboard flashed with bridge firmware
  • RS232 Firmware
    • Advantages: No special software is required, communication is reliable and stable
    • Disadvantages: To reflash the firmware, you need to enter manual DFU mode or double-click RST to enter Katapult to update the firmware
    • Note: Use with G2T or UTOR

Katapult Firmware Instructions​

tip

Katapult was originally named CanBoot and was later renamed.

  • Katapult firmware is a type of bootloader that can be used in conjunction with Klipper. After being flashed using methods like DFU, you can use commands to update the firmware in one click.
  • Advantages: Double resetting or quickly cutting power twice will enter the Katapult firmware, and the pre-configured LED will flash; if not configured, it won't flash.
  • The Katapult firmware can only be used for flashing firmware and cannot connect to Klipper!!!
  • There are three ways to connect the Katapult firmware to the host machine:
    • CAN connection
      • Advantages: After compiling the KLIPPER firmware, you can directly update the firmware using commands.
      • Disadvantages: You need to know the firmware compilation rate in advance.
    • RS232 connection
      • Advantages: After compiling the KLIPPER firmware, you can update the firmware using commands.
      • Disadvantages: You cannot update the firmware in one click using commands; you need to manually enter the Katapult firmware.
    • USB connection
      • Advantages: After compiling the KLIPPER firmware, you can directly update the firmware using commands.