tip

• SHT36 V2 provides Katapult firmware with USB and CAN connections, you can program it yourself if needed
• Katapult Firmware Programming
• SHT36 V2 is pre-programmed with the Katapult firmware for CAN connection at a rate of 1M

Notes

• SHT36 V2 uses three main controllers, please do not program the wrong one or it will not start
• APM 072 and STM 072 please see 072CAN Firmware Programming
• STM 103 please see 103CAN Firmware Programming

Firmware Programming Instructions

• Firmware compilation and programming both require the use of a host computer
• SHT36 V2 can connect to the host computer via CAN
• CAN needs to be connected using XT30(2+2)-F
• The following is the data cable style of XT30(2+2)-F
  

Notice

• Programming the mainboard firmware requires programming Klipper through Katapult
• If you are sure that the mainboard has already been programmed with Katapult, there is no need to program the Katapult firmware at the end
• You can quickly press the reset button twice to see if an LED lights up on the mainboard. If it does, it means the mainboard has entered the Katapult firmware

CAN Firmware Compilation

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

Katapult Firmware Description

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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.