Reference Wiring

Search RS232 ID

Notes Before Searching for Devices

• Before searching for the RS232 ID, please ensure the following conditions are met:
• Please ensure the tool board has been flashed with the RS232 firmware.
• Please ensure the tool board is connected to UTOR or G2T (ignore this if the main board has built-in RS232).
• Please ensure the tool board and the host computer share a common ground!!! This step is very important.

Search RS232 ID

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

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

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

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

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

4. Click SERIAL, then refresh.

   Refresh for fluidd

   Refresh for mainsail

5. Copy the ID; click the arrow to copy it.

   For fluidd, check if ttyUSB exists and ensure Path_by_hardware exists; this is the RS232_ID

   For mainsail, check if ttyUSB exists and ensure Path_by_hardware exists; this is the RS232_ID

Fill in the RS232 ID

1. Close DEVICES and fill in the ID

Note

• Please change the following in the configuration file:

[mcu] 
serial: /tmp/klipper_host_mcu

to

[mcu host] 
serial: /tmp/klipper_host_mcu

• Add:

[mcu]
serial: <Replace this with the ID you just looked up>
baud: 250000
restart_method:command

In fluidd, find [MCU]

In mainsail, find [MCU]

2. Fill in the ID in the configuration

tip

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

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

dangerous

Note: All IDs appearing in the document are examples. Each main board's ID is different; please fill in the actual obtained ID.

dangerous

Please note that the following ID cannot be used!!!:

serial: /dev/serial/by-id/usb-1a86_USB_Serial-if00-port0

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