Important Notes

Notes

This tutorial specifically covers the wiring and ID search for toolboards. The related steps are not applicable to mainboards. Please note the distinction.
If you are not using a toolboard, please ignore this tutorial.

Toolboard ID Reading and Viewing

USB ID Retrieval
CANBus UUID Retrieval
RS232 Usage Method

USB Connection Method

Supported Devices

Device Type	Connection Method	Requirements / Prerequisites
Toolboard	Connect to the USB-A port on the D8-Pro mainboard	Requires flashing USB communication firmware
Extended Mainboard	Connect to the USB-A port on the D8-Pro mainboard	Requires flashing USB communication firmware
USB Camera	Connect to the USB-A port on the D8-Pro mainboard	Must be a driverless plug-and-play type
USB Flash Drive	Connect to the USB-A port on the D8-Pro mainboard	Recommended to format with FAT32 file system

Precautions

Important Prerequisites

Before starting to search for the Tool Board ID, please ensure that all the following conditions are met:

Firmware Preparation: The tool board has been flashed with USB firmware or is currently in USB flashing mode.
Clear Objective: This tutorial is only for searching the Tool Board ID and is not applicable to the Main Board ID.
Hardware Connection: The Tool Board is correctly connected to the host computer's USB-A port via USB.
Login Method: Please log in to the host computer via SSH over the network to perform operations. Do not use serial port login.

Search for USB ID

ls /dev/serial/by-id/*

Normal Situation: The terminal will display an ID similar to the example below (the image below is for illustration only).
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If no ID appears after entering the command above, but lsusb shows the device, please try a different host computer or change the host computer's operating system.

Note

If multiple IDs appear, please select the one corresponding to your main board's MCU model.

Fill the USB ID into the Configuration

For fluidd: {…}, click to enter and find printer.cfg.

For mainsail: Machine, click to enter and find printer.cfg.

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Note: All IDs appearing in this document are examples. The actual ID for each main board is different. Please modify and fill in based on the ID you actually obtained.

Fill in the Tool Board USB ID

Below is a reference configuration.
Note
- toolboard in the configuration below refers to the tool board name. If it has a different name, please replace it with the corresponding name.
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[mcu toolboard] serial: <Replace here with the ID you just queried>
- When adding the Tool Board ID, it must be [mcu toolboard] followed by serial: and then the tool board ID you searched for.
- Below is a reference configuration.
- Please note this tutorial is for Tool Board ID search and configuration. Normally, the tool board should already be properly connected to the main board.
- And the main board must be [mcu], while the tool board is [mcu toolboard].
Reference for fluidd.

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Reference for mainsail.

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- Click the SAVE & RESTART button in the upper right corner. After clicking, Klipper will automatically save and restart.

CAN Reference Wiring

Termination Resistor Configuration Check:

Device	Configuration Method	Target State
Mainboard	Locate the jumper block or DIP switch labeled `120Ω`	Place jumper cap or switch to `ON`
Toolboard	Locate the jumper block or DIP switch labeled `120Ω`	Place jumper cap or switch to `ON`

Purpose: This resistor is crucial for ensuring stable CAN bus signals and preventing communication errors.

Complete Guide to CAN Toolboard Setup

Preparations

Important Prerequisites

Toolboard Status: Ensure the toolboard is flashed with Klipper-can firmware or is in Katapult-can mode.
Important Note: This tutorial is only for searching for Toolboard IDs. It is not applicable for searching for Mainboard IDs.
Connection Requirement: The toolboard must be connected to one of the following devices:
- A UTOC module
- A mainboard flashed with USB-to-CAN Bridge firmware
Final Connection: The aforementioned device must be connected to the host computer.

CAN Network Configuration Requirements

Default Configuration: This tutorial assumes the CAN network is already configured on the host computer.
Fly Users: If using a Fly host computer running the Fly-FAST system, CAN is configured by default (rate: 1Mbps).
First-Time Users: Please be sure to read the tutorial below first: CAN Configuration Tutorial

Connect via SSH

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

Search for CAN ID

Search command for a standard host computer:

~/klippy-env/bin/python ~/klipper/scripts/canbus_query.py can0

Search command for a FLY host computer:

python3 ~/klipper/scripts/canbus_query.py can0

Search Result Explanation

CANID

Important Note: The mainboard ID has already been configured in Klipper in previous documentation. Under normal circumstances, the mainboard's CANID cannot be found in the search.
Quick Verification Method: If confirmation is needed, first disconnect the CAN cable between the mainboard and the toolboard, then re-run the search.

After executing the search command, the following situations may occur:

Result Display	Status Description	Next Steps
`Application: Klipper`	Device is flashed with Klipper firmware	This ID can be used directly.
`Application: CANBOOT` or `Katapult`	Device is in Bootloader mode	Klipper firmware needs to be flashed before use.
`Total 0 uuids found`	No devices found	Please check the following issues: 1. Is the CAN network configured correctly? 2. Is the CAN rate consistent? (Default: 1Mbps) 3. Is this ID already used in the configuration? (You need to comment it out, save, power off, and restart.)

About Duplicate IDs

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

Comment out that device ID in the configuration file.
Save the configuration and restart Klipper.
Power off and restart all devices.

Configure CAN Device ID

1. Obtain the Configuration File

Locate the printer.cfg configuration file based on the web interface you are using:

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

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

2. Add Device Configuration

Add the toolboard configuration to printer.cfg:

[mcu toolboard]
canbus_uuid: <Enter the queried ID here>

Configuration Note

toolboard is the name of the toolboard. Please modify it according to your actual situation.
For a mainboard ID, the configuration section should be [mcu].
In a normal configuration, the mainboard uses [mcu], and toolboards use [mcu toolboard].

3. Save and Restart

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

Note

All IDs appearing in this document are examples. The actual ID for each mainboard/toolboard is different. Please modify and fill in based on the ID you actually obtain.

RS232 Reference Wiring

Searching for the RS232 ID of the Toolboard

Precautions

Important Preparations

Firmware Requirement:
The toolboard must be flashed with the RS232 firmware, otherwise communication will not be possible.
Mandatory Common Ground:
⚠️ Before connecting the toolboard, ensure its GND is connected to the mainboard's GND (using the same 24V/12V power supply achieves this).

RS232 Notes

Only the D8, D8PRO, and C8P mainboards support the RS232 interface. Other mainboards do not.
For unsupported mainboards, use G2T or UTOR for connection.

Searching for the RS232 ID

Open a browser, enter the host's IP address in the address bar (e.g., if the host IP is 192.168.101.179, enter it and press Enter).

Open the host's WEB interface. In the left sidebar configuration options, find:

For fluidd: {…}. Click to find printer.cfg.

For mainsail: Machine. Click to find printer.cfg.

Click printer.cfg, then click DEVICES in the top right corner.

Click SERIAL, then refresh.

Refreshing in fluidd.

Refreshing in mainsail.

Copy the ID. Click the indicated arrow to copy.

In fluidd, check if ch341-uart exists, then click Path_by_hardware. This is the RS232_ID.

In mainsail, check if CH341-UART exists, then click Path_by_hardware. This is the RS232_ID.

Note

When connecting the toolboard using UTOR, two RS232_IDs often appear. Try each one.

Configuring the Toolboard RS232 ID

Below is a reference configuration.
Note
- In the configuration below, toolboard refers to the toolboard name. If it has a different name, replace it accordingly.
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[mcu toolboard] serial: <Replace here with the ID you just queried> baud: 250000 restart_method: command
- When adding the toolboard ID, it must be [mcu toolboard], followed by serial:, and then the toolboard ID you found.
- Below is the reference configuration.
- Please note this tutorial is for toolboard ID search and configuration. Normally, the toolboard should already be properly connected to the mainboard.
- The mainboard is always [mcu], and the toolboard is [mcu toolboard].
- Click SAVE & RESTART in the top right corner. This will automatically save and restart Klipper.

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Toolboard ID Reading and Viewing

USB Connection Method​

Supported Devices​

Precautions​

Search for USB ID​

Fill the USB ID into the Configuration​

Fill in the Tool Board USB ID​

Complete Guide to CAN Toolboard Setup​

Preparations​

CAN Network Configuration Requirements​

Connect via SSH​

Search for CAN ID​

Search Result Explanation​

Configure CAN Device ID​

1. Obtain the Configuration File​

2. Add Device Configuration​

3. Save and Restart​

Searching for the RS232 ID of the Toolboard​

Precautions​

RS232 Notes​

Searching for the RS232 ID​

Configuring the Toolboard RS232 ID​

Note: All IDs appearing in this document are examples. The actual ID for each mainboard is different. Please use the ID you actually obtained. ::​

USB Connection Method

Supported Devices

Precautions

Search for USB ID

Fill the USB ID into the Configuration

Fill in the Tool Board USB ID

Complete Guide to CAN Toolboard Setup

Preparations

CAN Network Configuration Requirements

Connect via SSH

Search for CAN ID

Search Result Explanation

Configure CAN Device ID

1. Obtain the Configuration File

2. Add Device Configuration

3. Save and Restart

Searching for the RS232 ID of the Toolboard

Precautions

RS232 Notes

Searching for the RS232 ID

Configuring the Toolboard RS232 ID

Note: All IDs appearing in this document are examples. The actual ID for each mainboard is different. Please use the ID you actually obtained. ::