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Tip
  • SHT36 V2 provides Katapult firmware for both USB and CAN connections, which can be flashed as needed.
  • Katapult Firmware Flashing
  • SHT36 V2 is pre-flashed with CAN-connected Katapult firmware at a baud rate of 1M.
Notes

Firmware Flashing Instructions

  • Both firmware compilation and flashing require a host computer.
  • SHT36 V2 can be connected to the host computer via CAN.
  • CAN connection requires the use of XT30(2+2)-F.
  • Below is the appearance of the XT30(2+2)-F data cable:
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Important
  • Flashing the mainboard firmware requires flashing Klipper via Katapult.
  • If you are certain that the mainboard has already been flashed with Katapult, there is no need to proceed with flashing the Katapult firmware at the end.

CAN Firmware Compilation​

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

Katapult Firmware Explanation​

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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