tip

SHT36/42 are not pre-flashed with CAN-connected Katapult firmware at the factory
SHT36/42 CAN-connected Katapult firmware has two speeds: 500K and 1M, which can be burned if needed
Katapult Firmware Burning

Firmware Burning Instructions

How to Determine Which Firmware You Need

SHT36/42 can be connected to the host computer in CAM mode
CAN Firmware Burning
- Advantage: If Katapult firmware is burned, the firmware can be updated without touching the motherboard, and bus connection is supported
- Disadvantage: Using KlipperScreen together may cause homing timeout and other errors.
- Tip: If CAN is needed, please make sure the host computer supports CAN, and it needs to be used with UTOC or a motherboard with bridging firmware burned

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 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.