RS232 Toolboard Wiring and Configuration Guide

• RS232 Reference Wiring

Interface Configuration Guide

Notes

Important Preparation

1. Firmware Requirements:
   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 toolboard's GND to the mainboard's GND (sharing the same 24V/12V power supply will suffice).
3. Interface Features:
   • Dual RS232 interfaces support independent use of both simultaneously
   • Klipper's 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 Laser]
   serial: /dev/serial3  # Fixed device node for the left interface
   baud: 250000
   restart_method: command

2. Key Configuration Notes
   • Laser in [mcu Laser] can be customized
   • /dev/serial3 is the dedicated node for the left interface and cannot be changed

Right Interface (UART4)

Configuration Steps

1. Edit printer.cfg

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

2. Key Configuration Notes
   • ToolBoard in [mcu ToolBoard] can be customized
   • /dev/serial4 is the dedicated node for the right interface and cannot be changed

Configuration ID

1. Open your 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, directly enter it and press Enter.

2. Open the host computer's web interface and navigate to the configuration section in the left sidebar:

For fluidd: {…}, click into it to find printer.cfg

For mainsail: Machine, click into it to find printer.cfg

3. Fill in the corresponding ID

2. Apply Configuration

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

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