Tip

• The ERCF comes pre-flashed from the factory with Katapult firmware for CAN connections at a rate of 1M
• The ERCF CAN connection Katapult firmware rates are available in 500K and 1M, and can be re-flashed as needed
• Katapult firmware flashing

Firmware Flashing Instructions

• The ERCF can be connected to the host using a CAN connection

• CAN requires a XT30(2+2)-F for connection

• Below is the XT30(2+2)-F data cable style

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Instructions

• The mainboard firmware needs to be flashed with Klipper via Katapult
• If you are sure the mainboard has already been flashed with Katapult, flashing the Katapult firmware at the end is unnecessary

Selecting the Firmware Type

Please confirm the connection method first

• When a CAN toolboard is required: choose CAN firmware.
• When a CAN toolboard is not used: choose USB firmware.
• Only one of the two firmware types can be selected; do not flash both.

Firmware Type	Applicable Scenario	Advantages	Confirm before Selection	Operation
CAN Firmware	When a CAN toolboard is required	Supports connecting multiple devices via CAN bus	Confirm the host supports CAN, and prepare a UTOC or USB-CAN bridge mainboard	Compile CAN Firmware
USB Firmware	When a CAN toolboard is not used	Stable communication, simple configuration	When not using a CAN toolboard, use the USB firmware	Compile USB Firmware

Katapult Firmware Instructions

Name Explanation

Katapult was formerly known as CanBoot, and both names may appear simultaneously in older tutorials or firmware names.

Katapult is a bootloader used to boot and update Klipper:

• Katapult itself cannot be used as a Klipper MCU; after flashing, you still need to write Klipper firmware that matches the hardware and communication method.
• Supported tool boards can enter Katapult by quickly double-pressing the RESET button; after entering, there is usually a status light blinking.
• CAN, RS232, and USB use independent Katapult firmware; you cannot simply modify file names or mix them directly.
• For CAN firmware, you must also select the correct bus speed, with common speeds being 500K and 1M.