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Firmware Flashing Instructions

Host Connection Instructions​

Core Connection Limitation

The Fly-D8 mainboard can only communicate with the host for Klipper via the Type-C USB port.

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Connection Requirements:

  • Use a high-quality Type-C data cable to ensure stable data transmission.
  • It is recommended to avoid using excessively long data cables (not exceeding 1.5 meters).
  • Connect to a standard USB-A port on the host.

How to Choose the Correct Firmware​

🔧 Firmware Selection Rules

Please select the correct firmware according to your connection method and tool board type, following the rules below:

Configuration ScenarioMainboard FirmwareTool Board FirmwareKey Notes
Without Tool Board
(Direct USB connection)		USB Firmware—The most common configuration, suitable for most single-extruder printers.
Using CAN Tool BoardCAN Bridge FirmwareCAN FirmwareCommunication via CAN bus. Please note: The mainboard must be flashed with CAN Bridge firmware; otherwise, a USB-to-CAN adapter (e.g., UTOC) is required.
Using RS232 Tool BoardUSB FirmwareRS232 FirmwareConnect to the tool board via serial port; the mainboard still uses USB firmware.
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