Tip
- SB2040 PRO V3 comes pre-flashed with Katapult firmware for CAN connection at a rate of 1M
- SB2040 PRO V3 Katapult firmware for CAN connection is available in 500K and 1M rates; you can flash it yourself if needed
- Katapult Firmware Flashing
Firmware Flashing Instructions
- SB2040 PRO V3 can connect to the host via RS232 or CAN
- RS232 and CAN require
XT30(2+2)-Ffor connection - Below is the
XT30(2+2)-Fdata cable style
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Notice
- CAN firmware flashing requires flashing Klipper via Katapult (RS232 firmware is flashed directly via USB, no Katapult needed)
- If you confirm the mainboard already has Katapult flashed, there is no need to flash the Katapult firmware in the final section
- You can quickly press reset twice and check if an LED on the mainboard starts blinking; if so, it means the mainboard has entered Katapult firmware
Select Firmware Type
Please confirm the connection method first.
- If you need a CAN toolboard: choose CAN firmware.
- If you need an RS232 connection: choose RS232 firmware.
- Only one of the two firmware types can be selected; do not flash both simultaneously.
| Firmware Type | Applicable Scenario | Advantages | Confirm Before Choosing | Operation |
|---|---|---|---|---|
| CAN Firmware | When a CAN toolboard is needed | Supports connecting multiple devices via the CAN bus | Confirm that the host supports CAN, and prepare a UTOC or USB-CAN bridge board | Compile CAN Firmware |
| RS232 Firmware | When an RS232 connection is needed | Stable communication, simple configuration | Requires RS232 connection devices such as G2T or UTOR | Compile RS232 Firmware |
Katapult Firmware Notes
名称说明
Katapult 原名 CanBoot，两者在旧教程或旧固件名称中可能同时出现。
Katapult 是用于引导和更新 Klipper 的 Bootloader：
- Katapult 本身不能作为 Klipper MCU 使用，烧录后仍需写入与硬件和通信方式匹配的 Klipper 固件。
- 支持的工具板可以通过快速双击
RESET按键进入 Katapult；进入后通常会有状态灯闪烁。 - CAN、RS232 和 USB 使用相互独立的 Katapult 固件，不能只修改文件名或直接混用。
- CAN 固件还必须选择正确的总线速率，常见速率为
500K和1M。
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