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KNOMI2

Product Profile

The BIGTREETECH KNOMI V2.0 screen is a screen developed by the 3D printing team of Shenzhen BIQU Innovation Technology Co., Ltd. for printer nozzle display. Support for touch, making it convenient for customers to perform machine control operations.

Product Link: BIGTREETECH Official Website

Features Highlights

Screen
Display Size
1.28inches
Display Area
32.4(H)mm x 32.4(V)mm
Resolution
240RGB x 240dots
Viewing Angle
178°
Backlight Brightness
400Cd/m2
Backlight Lifespan
>20,000hours
Chip
>GC9A01
Power Supply
Input
DC 5V 1A
Logic Voltage
DC 3.3V
Rated Power
5W
Communication & Memory
Communication
ESP32-WIFI 802.11 b/g/n (802.11n, up to 150 Mbps), operating center frequency range: 2412 - 2484 MHz
Screen Communication
SPI
Wireless Connectivity
Onboard 2.4GHz Wi-Fi + Bluetooth Low Energy (BLE) SoC IEEE 802.11 b/g/n (2.4GHz Wi-Fi) and Bluetooth 5 (LE)
Flash
16MB
PSRAM
8MB
Operating & Storage Conditions
Firmware Support
Klipper
Operating Temperature
-20°C to 70°C
Storage Temperature
-30°C to 80°C

Note

For information about KNOMI structure, please click KNOMI 2 USER GUIDE.PDF

Performance Comparison Test

Question

DOES USING KNOMI IMPACT YOUR STEALTHBURNER'S PERFORMANCE?

We have customized installation print parts for KNOMI 2, facilitating its easy installation into your Voron StealthBurner. In particular, our StealthBurner Main Body not only retains the original fan positions but also incorporates a circular ventilation opening at the top, enhancing compatibility and optimizing heat dissipation.

Printed Parts

Download The Printed Parts from Bigtreetech/Knomi

Mounting Plate

Before you start the assembly, we recommend preparing these two printed parts in advance. The Mounting Plate is designed with a snap-on feature due to size limitations and considerations for the air duct design. This may cause some wear and tear through repeated disassembling and reassembling. Hence, we suggest printing several extra copies of this part for future use.

We conducted a comparative analysis measuring wind speed and acoustic energy levels between the original StealthBurner and our customized version featuring vents and KNOMI add-on. The results showed that both versions performed similarly, indicating that adding KNOMI will not compromise the performance of the StealthBurner.

Packing List

Overview

CONFIGURING WIFI

Wi-Fi Compatibility

Due to device compatibility issues, KNOMI 2 cannot configure networks with WPA PSK encryption.If you encounter an error configuring your network with KNOMI 2, please check the encryption method of your router and switch it to WPA/WPA2 PSK mixed mode or another compatible mode.

Knomi Disconnected

This status on KNOMI 2 indicates it has lost connection to the WiFi hotspot. Potential causes:

  1. You changed the WiFi name or password, requiring a long press of the BOOT button to get to the HELLO interface and reconfigure KNOMI 2's network connection.
  2. KNOMI 2 is too far from the WiFi hotspot, resulting in poor signal quality.

Install Knomi To Stealthburner

Power Cable Routing

As shown, guide KNOMI 2's power cable through the hole in the printed part, and then direct it towards the rear of the EBB SB0000 CAN.

If you are not using the EBB SB0000 CAN or a similar tool board, after routing the power cable as shown in the diagram, connect it to your motherboard or other power source.

Adding Relevant Macros

[gcode_macro _KNOMI_STATUS]
variable_homing: False
variable_probing: False
variable_qgling: False
variable_heating_nozzle: False
variable_heating_bed: False
gcode:

[gcode_macro M109]
rename_existing: M109.1
gcode:
    SET_GCODE_VARIABLE MACRO=_KNOMI_STATUS VARIABLE=heating_nozzle VALUE=True
    M109.1 {rawparams}
    SET_GCODE_VARIABLE MACRO=_KNOMI_STATUS VARIABLE=heating_nozzle VALUE=False

[gcode_macro M190]
rename_existing: M190.1
gcode:
    SET_GCODE_VARIABLE MACRO=_KNOMI_STATUS VARIABLE=heating_bed VALUE=True
    M190.1 {rawparams}
    SET_GCODE_VARIABLE MACRO=_KNOMI_STATUS VARIABLE=heating_bed VALUE=False

[gcode_macro G28]
rename_existing: G28.1
gcode:
    SET_GCODE_VARIABLE MACRO=_KNOMI_STATUS VARIABLE=homing VALUE=True
    G28.1 {rawparams}
    SET_GCODE_VARIABLE MACRO=_KNOMI_STATUS VARIABLE=homing VALUE=False

[gcode_macro BED_MESH_CALIBRATE]
rename_existing: BTT_BED_MESH_CALIBRATE
gcode:
    SET_GCODE_VARIABLE MACRO=_KNOMI_STATUS VARIABLE=probing VALUE=True
    BTT_BED_MESH_CALIBRATE
    SET_GCODE_VARIABLE MACRO=_KNOMI_STATUS VARIABLE=probing VALUE=False

If the printer has a QGL feature

[gcode_macro QUAD_GANTRY_LEVEL]
rename_existing: BTT_QUAD_GANTRY_LEVEL
gcode:
    SET_GCODE_VARIABLE MACRO=_KNOMI_STATUS VARIABLE=qgling VALUE=True
    BTT_QUAD_GANTRY_LEVEL
    SET_GCODE_VARIABLE MACRO=_KNOMI_STATUS VARIABLE=qgling VALUE=False

If there is no QGL but there is a Z_TILT function, you can follow the settings below :

[gcode_macro QUAD_GANTRY_LEVEL]
gcode:
    SET_GCODE_VARIABLE MACRO=_KNOMI_STATUS VARIABLE=qgling VALUE=True
    Z_TILT_ADJUST
    SET_GCODE_VARIABLE MACRO=_KNOMI_STATUS VARIABLE=qgling VALUE=False

Updating Firmware

Enter http://knomi.local into your browser to access the KNOMI 2 network configuration page. Scroll to the bottom of the page and click Update FW.

Click on Choose File on the firmware update page.

Select the xxx.bin file.

The firmware will automatically update over-the-air.

KNOMI 2 will reboot to indicate a successful update. The page will also show information that the update succeeded. At this point, you can click Back to return to the main KNOMI 2 network configuration interface.

KNOMI UI

Knomi Control UI Instruction & Gesture Operation

KNOMI 2 supports full-screen touch, swiping up, down, left, and right, as well as long press operations.

Main Interface

How To Extrude And Retract Filament?

Swipe right from the Standby UI to access the Extruding/Retracting Filament interface.

How To Adjust The Temperature Of The Nozzle/bed?

Swipe left from the Standby UI to access the Nozzle/Heated Bed Temperature Settings interface.

Manual Temperature Adjustment Is Not Required

Advanced setting

please only use it if you fully understand its specific function.

Config mDNS URL

KNOMI has built-in mDNS. You can enter http://knomi.local in the browser (The default hostname is KNOMI. If users have modified it, please use the custom name instead of knomi in the URL, the URL characters are case-insensitive), or view the IP address on the Knomi Info.

Adjust Knomi UI Colors?

You can further customize the saturation and brightness: After selecting a color on the wheel, long press the black area outside the wheel to cycle through saturation, brightness, and back to the RGB wheel.

When you pick a saturation/brightness level, returning to the RGB wheel will show that saturation/brightness.

Adjust Brightness?

KNOMI UI Status Icons

KNOMI UI uses visual elements to provide status information at different stages of printer operation :

FAQ