Read and view motherboard ID

USB ID acquisition

Search for USB ID

1. Open the browser and enter the IP address of the host computer in the address bar, for example, if the IP address of my host computer is 192.168.101.179, simply enter it and press Enter.

2. Open the WEB interface of the host computer, find in the configuration options on the left sidebar:

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

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

3. Click into printer.cfg, then click DEVICES on the top right

4. Click SERIAL, then refresh

Refresh for fluidd

Refresh for mainsail

5. Copy the ID, click the arrow to copy

For fluidd, check whether ttyAMC exists and ensure Path by ID exists, this is the USBID

For mainsail, check whether ttyAMC exists and ensure Path by ID exists, this is the USBID

Fill in USB ID

1. Close DEVICES and fill in the ID

Note

• Please modify the configuration file as follows:

[mcu] 
serial: /tmp/klipper_host_mcu

to

[mcu host] 
serial: /tmp/klipper_host_mcu

• Add:

[mcu]
serial: <replace with the ID you just queried>

Find [MCU] in fluidd

Find [MCU] in mainsail

2. Fill in the ID in the configuration

tip

• After filling in the ID, click SAVE & RESTART on the top right

3. If Klipper prompts ADC out of range, this is a normal phenomenon. Connect the heated bed and thermistor to the motherboard, configure the thermistor pins for the nozzle and heated bed, then save and restart.

dangerous

Note: All IDs mentioned in the document are examples. Each motherboard has a different ID, please fill in the actual obtained ID.

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CANBus UUID acquisition

• CAN reference wiring

  

  Search for CAN ID

  1. Open the browser and enter the IP address of the host computer in the address bar. For example, if my host computer's IP is 192.168.101.179, just type it in and press Enter.

     

  2. Open the WEB interface of the host computer, find in the configuration options on the left sidebar:

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

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

     3. Click printer.cfg, then click DEVICES on the top right
     4. Click CAN, then refresh

     Refresh for fluidd

     Refresh for mainsail

     5. Copy the ID, click the arrow to copy

     For fluidd, confirm whether the first arrow points to Klipper, if yes, click the right arrow to copy

     For mainsail, confirm whether the first arrow points to Klipper, if yes, click the right arrow to copy

  Fill in CAN ID

  1. Close DEVICES and fill in the ID
  Note

  • Please modify the following content in the configuration file:

  [mcu] 
  serial: /tmp/klipper_host_mcu

  to

  [mcu host] 
  serial: /tmp/klipper_host_mcu

  • Add:

  [mcu]
  canbus_uuid: <Replace with the ID you just queried>

  Find [MCU] in fluidd

  Find [MCU] in mainsail

  2. Fill in the ID in the configuration
  tip

  • After filling in the ID, click SAVE & RESTART on the top right
  3. If Klipper prompts ADC out of range, this is a normal phenomenon. Connect the heated bed and thermistor to the motherboard and configure the thermistor pins of the nozzle and heated bed, then save and restart.
  dangerous

  Note: All IDs mentioned in the document are examples. Each motherboard has a different ID. Please fill in the actual obtained ID.

  ---

RS232 usage method

• RS232 reference wiring

Interface Configuration Instructions

Core Notes

Important Preparation

1. Firmware Requirement:
   The toolboard must be flashed with RS232 firmware, otherwise communication will not be possible
2. Must Share Ground:
   ⚠️ Before connecting the toolboard, ensure it shares the same power source as C8P or connect the GND of the toolboard to the mainboard (simply sharing the same 24V/12V power source is sufficient)
3. Interface Characteristics:
   • Dual RS232 interfaces support independent/simultaneous use
   • Klipper serial: parameter is hardware fixed and cannot be modified

Wiring Standards

Wiring method for the left interface (SERIAL3)

Wiring method for the right interface (SERIAL4)

Left Interface (SERIAL3)

Configuration Steps

1. Edit printer.cfg

   [mcu ToolBoard]  # Change "ToolBoard" to the actual name
   serial: /dev/serial3  # Dedicated device node for the left interface
   baud: 250000
   restart_method: command

2. Key Settings Explanation
   • The [mcu] name must reflect the function of the toolboard (e.g., [mcu Laser])
   • /dev/serial3 is the exclusive node for the left interface, which cannot be changed

Right Interface (UART4)

Configuration Steps

1. Edit printer.cfg

   [mcu ToolBoard]  # Change "ToolBoard" to the actual name
   serial: /dev/serial4  # Dedicated device node for the right interface
   baud: 250000
   restart_method: command

2. Key Settings Explanation
   • The [mcu] name must reflect the function of the toolboard (e.g., [mcu Extruder])
   • /dev/serial4 is the exclusive node for the right interface, which cannot be changed

General Operation Process

1. Open the browser, enter the IP address of the host computer in the address bar, for example, my host computer IP is 192.168.101.179, just enter it and press Enter.

2. Open the WEB interface of the host computer, find in the configuration options on the left sidebar:

fluidd: {…} , click to enter, you can find printer.cfg

mainsail: Machine, click to enter, you can find printer.cfg

3. Fill in the corresponding ID

2. Apply Configuration

   • After pasting the configuration code into the corresponding area
   • Click SAVE & RESTART in the top right corner

3. If Klipper prompts ADC out of range, this is a normal phenomenon. Connect the hot bed and thermistor to the mainboard, configure the thermistor pins for the nozzle and hot bed, then save and restart.