tip

• SHT36 V2 provides Katapult firmware for USB and CAN connections, which can be flashed if needed.
• Katapult Firmware Flashing
• SHT36 V2 comes pre-flashed with Katapult firmware for CAN connection at a rate of 1M

Attention

• SHT36 V2 uses three types of main controllers, do not flash the wrong one or it will not start.
• For APM 072 and STM 072, please see 072CAN Firmware Flashing
• For STM 103, please see 103CAN Firmware Flashing

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 requires the use of XT30(2+2)-F for connection.
• Below is the XT30(2+2)-F data cable style
  

Note

• The motherboard firmware needs to be flashed through Katapult to flash Klipper.
• If it is confirmed that the motherboard has been flashed with Katapult, there is no need to flash the Katapult firmware at the end, which is just in case the Katapult firmware on the motherboard did not flash successfully.
• You can quickly press the reset button twice and see if an LED on the motherboard starts to blink, indicating that the motherboard has entered the Katapult firmware.

CAN Firmware Compilation

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

Katapult Firmware Instructions

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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.