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Tip
  • SHT36 V2 provides Katapult firmware for both USB and CAN connections. It can be flashed as needed.
  • Katapult Firmware Flashing
  • SHT36 V2 comes pre-flashed with Katapult firmware for CAN connection at a rate of 1M.
Important Notes

Firmware Flashing Instructions

  • Both firmware compilation and flashing require the use of a host computer.
  • SHT36 V2 can connect to the host computer via CAN.
  • CAN connection requires the use of an XT30(2+2)-F cable.
  • Below is the style of the XT30(2+2)-F data cable:
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Important Information
  • Motherboard firmware flashing requires flashing Klipper via Katapult.
  • If you are certain the motherboard already has Katapult flashed, you do not need to perform the final step of flashing the Katapult firmware.

CAN Firmware Compilation​

  • SHT36 V2 can only connect to the host computer via CAN.
  • For STM 103, please refer to: 103 CAN Firmware Flashing
  • For APM 072 and STM 072, please refer to: 072 CAN Firmware Flashing

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 rapidly to enter Katapult firmware, at which point the motherboard's LED 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, the firmware can be updated directly using commands, with strong anti-interference capabilities.
      • Disadvantages: The firmware compilation rate must be known in advance.
    • RS232 connection
      • Advantages: After compiling the Klipper firmware, the firmware can be updated using commands, with very strong anti-interference capabilities.
      • Disadvantages: Firmware cannot be updated with a single command; manual entry into Katapult firmware is required.
    • USB connection
      • Advantages: After compiling the Klipper firmware, the firmware can be updated directly using commands.
      • Disadvantages: Long data cables are prone to interference, which may cause disconnections.
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