RS232 Toolboard Wiring and Configuration Method

Interface Configuration Guide

Important Preparation

Firmware Requirement:
The tool board must be flashed with RS232 firmware, otherwise communication will not be possible.
Mandatory Common Ground:
⚠️ Before connecting the tool board, ensure it shares the same power supply as the C8P or connect the GND of the tool board to the motherboard's GND (using the same 24V/12V power supply is sufficient).
Interface Characteristics:
- Dual RS232 interfaces support independent or simultaneous use of both
- Klipper serial: parameter is hardware-fixed and cannot be modified

Edit printer.cfg

[mcu Laser]
serial: /dev/serial3  # Fixed device node for left interface
baud: 250000
restart_method: command

Key Settings Description
- Laser in [mcu Laser] can be customized
- /dev/serial3 is the dedicated node for the left interface and cannot be changed

Edit printer.cfg

[mcu ToolBoard]
serial: /dev/serial4  # Fixed device node for right interface
baud: 250000
restart_method: command

Key Settings Description
- ToolBoard in [mcu ToolBoard] can be customized
- /dev/serial4 is the dedicated node for the right interface and cannot be changed

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

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

Apply Configuration
- After pasting the configuration code into the appropriate area
- Click SAVE & RESTART in the upper right corner
If Klipper reports ADC out of range, this is normal. Connect the heat bed and thermistor to the motherboard, configure the thermistor pins for the nozzle and heat bed, then save and restart.