Others¶

Boards Layout — K2 Plus¶

The K2 Plus uses two MCU boards: the main control board and a nozzle MCU board mounted on the toolhead.

Main Control Board¶

Board ID: CR4FN200338C15
MCU chip: GD32F303RET6

Key Pin Assignments¶

Function	Pin	Notes
Stepper X step	`PB8`
Stepper X dir	`!PB7`	inverted
Stepper X enable	`!PA9`	shared enable
Stepper Y step	`PB10`
Stepper Y dir	`PB9`
Stepper Z step	`PB6`
Stepper Z dir	`PB5`
Stepper Z1 step	`PB15`	second Z motor
Stepper Z1 dir	`PA1`
Stepper enable (all)	`!PA9`
Endstop X	`PB11`
Endstop Y	`PB12`
Z endstop	`probe:z_virtual_endstop`	prtouch_v3
Heated bed heater	`PC8`
Heated bed thermistor	`PC4`	EPCOS 100K
Chamber heater (PTC)	`PC12`	heater_generic
Chamber thermistor	`PC5`	NTC 100K
Chamber cooling fan	`PA0`	temperature_fan, shared pin
Chamber PTC fan enable	`!PB14`	heater_fan
PTC power enable	`PB2`	output_pin, default 1
Aux fan (fan2)	`PB4` + `PB3`	multi_pin
LED strip	`PB0` + `PA12`	multi_pin, PWM
Power output	`PC9`
Z alignment endstops	`PA15`, `PA8`	z_align module
Filament rack sensor	`!PA5`	filament_rack
MCU serial (main)	`/dev/ttyS2`	baud 230400
CFS RS-485 serial	`/dev/ttyS5`	baud 230400

Nozzle MCU Board¶

Board ID: CR1FN200338C15
MCU chip: GD32F303CBT6
Serial: /dev/ttyS3 baud 230400

Key Pin Assignments¶

Function	Pin	Notes
Extruder step	`nozzle_mcu:PB5`
Extruder dir	`!nozzle_mcu:PB4`	inverted
Extruder enable	`!nozzle_mcu:PB2`
Hotend heater	`nozzle_mcu:PB8`
Hotend thermistor	`nozzle_mcu:PA0`	custom thermistor
Hotend fan (heatsink)	`nozzle_mcu:PB7` + `PB1`	multi_pin heater_fan
Part cooling fan enable	`nozzle_mcu:PB6`	fan0_en gate
Part cooling fan (fan0)	`!nozzle_mcu:PB15`	PWM
Extruder fan output	`nozzle_mcu:PB1`
Filament sensor	`^!nozzle_mcu:PA11`	filament_switch_sensor
CFS cut switch	`!nozzle_mcu:PB9`	box switch_pin
LIS2DW CS	`nozzle_mcu:PA4`	SPI accelerometer
LIS2DW SCLK	`nozzle_mcu:PA5`
LIS2DW MOSI	`nozzle_mcu:PA7`
LIS2DW MISO	`nozzle_mcu:PA6`
prtouch_v3 pressure CS	`nozzle_mcu:PB13`, `nozzle_mcu:PB14`	strain gauge
prtouch_v3 step swap	`!PC7`	main board
prtouch_v3 pres swap	`nozzle_mcu:PA15`

Host MCU (Raspberry Pi style)¶

The K2 Plus runs a secondary Linux host MCU for accelerometer data collection.

[mcu rpi]
serial: /tmp/klipper_host_mcu

Serial Port Map¶

Device	Purpose
`/dev/ttyS2`	Main MCU (GD32F303RET6)
`/dev/ttyS3`	Nozzle MCU (GD32F303CBT6)
`/dev/ttyS5`	CFS RS-485 bus

Duplicate pin override

The K2 Plus printer.cfg requires a large [duplicate_pin_override] section because several pins are shared between multiple Klipper objects (e.g. PA0 is used by both temperature_fan chamber_fan and output_pin fan2). Do not remove this section or Klipper will refuse to start.

[duplicate_pin_override]
pins: PC5,PA0,PC7,PB7,PB8,PB9,PB10,PB5,PB6,PA1,PB15,PB11,PB12,PB13,PA10,PA9,PB2,PB14,PB1

Files Location — K2 Plus¶

All persistent data on the K2 Plus lives under /mnt/UDISK/. There is no /usr/data/ path on the K2 Plus — this differs from the K1 Series.

Connect via SSH to access these locations.

Klipper & Printer Data¶

Resource	Path
Klipper configuration files	`/mnt/UDISK/printer_data/config/`
GCode files	`/mnt/UDISK/printer_data/gcodes/`
Klipper log	`/mnt/UDISK/printer_data/logs/klippy.log`
Moonraker log	`/mnt/UDISK/printer_data/logs/moonraker.log`
Moonraker database	`/mnt/UDISK/printer_data/`
Moonraker timelapse videos	`/mnt/UDISK/printer_data/timelapse/`

Creality System Data¶

Resource	Path
System config (self-check flag, etc.)	`/mnt/UDISK/creality/userdata/config/system_config.json`
Creality timelapse videos	`/mnt/UDISK/creality/userdata/delay_image/video/`
AI image data	`/mnt/UDISK/ai_image/`
Layer image data	`/mnt/UDISK/layers_image/`

Read-Only System Paths¶

These paths live on a read-only partition and cannot be edited in place. Modifying them requires overlaying or replacing the binary/file via the helper script approach.

Resource	Path
Klipper Python env	`/usr/share/klippy-env/bin/python`
Klipper source	`/usr/share/klipper/klippy/klippy.py`
Klipper config templates	`/usr/share/klipper/config/F008_CR0CN240319C13_1/`
Moonraker Python env	`/usr/share/moonraker-env/bin/python`
Moonraker source	`/usr/share/moonraker/`
Moonraker config	`/usr/share/moonraker/moonraker.conf`
Fluidd static files	`/usr/share/fluidd/`
Nginx config	`/etc/nginx/nginx.conf`

Service Scripts¶

The K2 Plus uses OpenWrt-style rc.d init scripts. There is no systemd or supervisord.

Service	Start script	Stop script
klipper MCU bridge	`/etc/init.d/S54klipper_mcu`	`/etc/rc.d/K54klipper_mcu` (if present)
Klipper (klippy)	`/etc/init.d/S55klipper`	—
Moonraker	`/etc/init.d/S56moonraker`	—
Nginx	`/etc/init.d/S80nginx`	—
WebRTC (camera)	`/etc/init.d/S97webrtc`	`/etc/rc.d/K97webrtc`

To restart a service over SSH:

/etc/init.d/S55klipper restart
/etc/init.d/S56moonraker restart
/etc/init.d/S80nginx restart

No supervisorctl on K2 Plus

Unlike the K1 Series, the K2 Plus does not use Supervisor Lite. The supervisorctl command is not available. Use the rc.d init scripts above instead.

Useful Links — K2 Plus¶

Sw3Defy K2 Plus Resources¶

Resource	Link
This Wiki	sw3defy.github.io/Creality-Helper-Script-Wiki-K2-Plus
Helper Script (K2 Plus)	github.com/sw3defy/Creality-Helper-Script-K2-Plus
Wiki Repository	github.com/sw3defy/Creality-Helper-Script-Wiki-K2-Plus

Original Guilouz Resources (K1 Series)¶

Resource	Link
Guilouz Helper Script Wiki	guilouz.github.io/Creality-Helper-Script-Wiki
Guilouz Helper Script	github.com/Guilouz/Creality-Helper-Script
Support Guilouz	ko-fi.com/guilouz

Creality K2 Plus Official¶

Resource	Link
K2 Series Firmware	crealitycloud.com/software-firmware/firmware/k2-series
Creality Open Source	github.com/CrealityOfficial/K2_Series_Klipper
Creality Cloud	crealitycloud.com
Creality Support	crealitycloud.com/support

Klipper Ecosystem¶

Resource	Link
Klipper Documentation	klipper3d.org/Overview.html
Klipper Config Reference	klipper3d.org/Config_Reference.html
Klipper G-Code Reference	klipper3d.org/G-Codes.html
Moonraker Documentation	moonraker.readthedocs.io
Fluidd Documentation	docs.fluidd.xyz
Mainsail Documentation	docs.mainsail.xyz
KAMP (Adaptive Meshing)	github.com/kyleisah/Klipper-Adaptive-Meshing-Purging

Slicers¶

Resource	Link
OrcaSlicer	github.com/SoftFever/OrcaSlicer/releases
Creality Print	creality.com/pages/download

Community¶

Resource	Link
Creality K2 Plus Reddit	reddit.com/r/crealityk1
Guilouz Discussions	github.com/Guilouz/Creality-Helper-Script-Wiki/discussions
OctoEverywhere	octoeverywhere.com
Mobileraker	mobileraker.com
SimplyPrint K2 Guide	simplyprint.io/setup-guide/creality/k2

Stock K2 Plus Configuration Files¶

The stock Klipper config files for the K2 Plus are available in the Guilouz extracted firmware repository:

Resource	Link
Guilouz K2 Plus Extracted Firmware	github.com/Guilouz/Creality-K2Plus-Extracted-Firmwares