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Tool Board ID Reading and Viewing

  • Please check whether the DIP switch is set to CAN mode.
  • Ensure that the resistance between CAN H and CAN L, measured with a multimeter while powered off, is around 60Ω. If it is 120Ω, turn on the 120Ω DIP switch; if it is around 40Ω, turn off the DIP switch.
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  • Before searching for the ID, connect the tool board to a UTOC or a mainboard flashed with bridge firmware using an XT30 data cable. Below is a reference wiring diagram.
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    Complete Guide to CAN Toolboard Setup​

    Preparation​

    Important Prerequisites
    • Toolboard Status: Ensure the toolboard has been flashed with Klipper-can firmware or is in Katapult-can mode
    • Note: This guide is only for toolboard ID search, not applicable for motherboard ID search
    • Connection Requirements: The toolboard must be connected to one of the following devices:
      • UTOC module
      • A motherboard flashed with USB bridge CAN firmware
    • Final Connection: The above devices must be connected to the host computer

    CAN Network Configuration Requirements​

    • Default Configuration: This guide assumes the host computer has already configured the CAN network
    • Fly Users: If using a Fly host computer running the Fly-FAST system, CAN is configured by default (rate 1Mbps)
    • First Time Use: Please read the following tutorial first: CAN Configuration Guide

    Connect to SSH​

    • Log in to SSH via network (Do not use serial port login)
    • Ensure the host computer is properly connected to the CAN network device

    Search for CAN ID​

    • Standard host computer search command 
      ~/klippy-env/bin/python ~/klipper/scripts/canbus_query.py can0
    • FLY host computer search command 
      python3 ~/klipper/scripts/canbus_query.py can0

    Search Results Explanation​

    CANID
    • Note: The motherboard ID has already been configured in Klipper in previous documentation; under normal circumstances, the motherboard's CANID cannot be found
    • Quick verification method: If confirmation is needed, first disconnect the CAN connection cable between the motherboard and the toolboard, then re-execute the search
    • After executing the search command, the following situations may occur:
    Display ResultStatus DescriptionNext Steps
    Application: KlipperDevice has been flashed with Klipper firmwareCan use this ID directly
    Application: CANBOOT or KatapultDevice is in Bootloader modeMust flash Klipper firmware before use
    Total 0 uuids foundNo devices foundCheck the following issues:
    1. Is the CAN network configured correctly
    2. Are CAN rates consistent (default 1Mbps)
    3. Is the ID already used in the configuration (disable, save, power cycle first)
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    About Duplicate IDs

    If a device ID is already configured in printer.cfg, it will not appear in the search results. To re-search, please:

    1. Comment out the device ID in the configuration file
    2. Save the configuration and restart Klipper
    3. Power cycle all devices

    Configure CAN Device ID​

    1. Obtain Configuration File​

    Depending on the web interface used, locate the printer.cfg configuration file:

    Fluidd
    Click the {...} icon in the left navigation bar, find printer.cfg

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    Mainsail
    Click Machine in the top navigation bar, find printer.cfg

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    2. Add Device Configuration​

    Add the toolboard configuration to printer.cfg:

    [mcu toolboard]
    canbus_uuid: <fill in the queried ID here>
    Configuration Explanation
    • toolboard is the toolboard name; modify it according to the actual situation
    • If it is a motherboard ID, the configuration section should be [mcu]
    • In normal configuration, the motherboard uses [mcu], and the toolboard uses [mcu toolboard]

    3. Save and Restart​

    1. Click the SAVE & RESTART button in the upper right corner
    2. The system will automatically save the configuration and restart Klipper
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    Note

    All IDs appearing in this document are examples only; each motherboard's ID is different. Please modify and fill in based on the actual ID obtained.

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