Tip

• ERCF V2 comes pre-flashed with Katapult firmware for CAN connection at a rate of 1M
• The Katapult firmware for ERCF V2 CAN connection is available in 500K and 1M rates; you can flash it yourself if needed
• Katapult Firmware Flashing

Firmware Flashing Instructions

• ERCF V2 can connect to the host via RS232, CAN, or USB
• RS232 and CAN require an XT30(2+2)-F for connection
• Below is the XT30(2+2)-F data cable style
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Notice

• Mainboard firmware flashing requires using Katapult to flash Klipper
• If you are certain that Katapult has already been flashed to the mainboard, there is no need to perform the Katapult firmware flashing at the end

Select Firmware Type

Please confirm the connection method first

• When a CAN toolboard is needed: select CAN firmware.
• When RS232 connection is needed: select RS232 Firmware.
• When USB direct connection is needed without using a CAN toolboard: select USB firmware.
• Only one of the three firmware types can be selected; do not flash them simultaneously.

Firmware Type	Applicable Scenario	Advantages	Confirm Before Selecting	Operation
CAN Firmware	When a CAN toolboard is needed	Supports connecting multiple devices via CAN bus	Confirm the host supports CAN, and prepare a UTOC or USB-CAN bridge board	Compile CAN Firmware
RS232 Firmware	When RS232 connection is needed	Stable communication, simple configuration	Requires pairing with RS232 connection devices such as G2T or UTOR	Compile RS232 Firmware
USB Firmware	When USB direct connection is needed	Stable communication, simple configuration	Confirm the host USB port and data cable can communicate properly	Compile USB Firmware

Katapult Firmware Explanation

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。