qmk-rgb

QMK VIA RGB Tool

Control the RGB lighting on QMK-compatible keyboards. Supports Impact 80 and Rainy 75 out of the box, and any other keyboard running QMK with the RGB Matrix subsystem and VIA support.

Cross-platform CLI for Linux, macOS, and Windows. Designed for automation, scripting, and agent consumption.

Installation

git clone <repo-url>
cd impact-80
go build -o qmk-rgb ./cmd/qmk-rgb/

On Linux, libudev-dev is required for building (the hid library uses it for device discovery). Or install globally:

go install ./cmd/qmk-rgb/

Usage

# Discover connected keyboards
./qmk-rgb keyboard info

# RGB commands target Logo, Backlight, and Side by default
./qmk-rgb rgb effect breathing
./qmk-rgb rgb effect rainbow_moving_chevron
./qmk-rgb rgb effect rainbow_moving_chevron --zone backlight
./qmk-rgb rgb brightness 160
./qmk-rgb rgb speed 2
./qmk-rgb rgb color 00ff00
# Raw mode IDs are zone-specific; ID 17 is Backlight-only
./qmk-rgb rgb mode 17 --zone backlight
./qmk-rgb rgb enable
./qmk-rgb rgb disable
./qmk-rgb rgb info

# Select exactly one zone
./qmk-rgb rgb brightness 160 --zone side

# Specify a target device (when multiple are connected)
./qmk-rgb rgb --device /dev/hidraw0 enable

--zone is persistent on rgb and accepts logo, backlight, or side. Without --zone, commands target Logo, Backlight, and Side in that order. With --zone, commands target exactly the selected zone. An unsupported name for an explicit zone fails before the device is opened; a default command skips unsupported zones and prints a warning on stderr.

All output is machine-parseable JSON when applicable.

Impact 80 Zones and Effects

Zone	CLI name	VIA channel	Effect IDs
Logo	logo	2	0–6
Backlight	backlight	3	0–45
Side	side	4	0–6

Logo and Side share this complete effect family:

ID	Name
0	none
1	wave
2	fixed_wave
3	spectrum
4	breathing
5	light
6	shutdown

Backlight uses the complete Impact 80 catalog:

ID	Name	ID	Name
0	none	23	flower_blooming
1	solid_color	24	raindrops
2	alphas_mods	25	jellybean_raindrops
3	gradient_up_down	26	hue_breathing
4	gradient_left_right	27	hue_pendulum
5	breathing	28	hue_wave
6	band_sat	29	pixel_flow
7	band_val	30	digital_rain
8	band_pinwheel_sat	31	solid_reactive
9	band_pinwheel_val	32	solid_reactive_wide
10	band_spiral_sat	33	solid_reactive_multiwide
11	band_spiral_val	34	solid_reactive_cross
12	cycle_all	35	solid_reactive_multicross
13	cycle_left_right	36	solid_reactive_nexus
14	cycle_up_down	37	solid_reactive_multinexus
15	cycle_out_in	38	splash
16	cycle_out_in_dual	39	multisplash
17	rainbow_moving_chevron	40	solid_splash
18	cycle_pinwheel	41	solid_multisplash
19	cycle_spiral	42	starlight
20	dual_beacon	43	starlight_dual_hue
21	rainbow_beacon	44	starlight_dual_sat
22	rainbow_pinwheels	45	riverflow

Effect Behavior

Effects fall into categories that behave differently:

• Static effects (solid_color, none) display a steady output. The color is set by rgb color and is constant.
• Reactive effects (solid_reactive*) light up on key press. They honor the color set by rgb color — the pressed key's LEDs flash in the configured color. Use rgb speed to adjust how long the illumination lasts.
• Breathing effects (breathing, hue_breathing) slowly fade in and out. They do not honor rgb color directly; hue_breathing cycles through the full hue range.
• Dynamic/stream effects (band_*, cycle_*, rainbow_*, starlight*, raindrops, jellybean_raindrops, flower_blooming, pixel_flow, riverflow) animate independently. Most ignore rgb color and use their own color palettes. hue_breathing, hue_pendulum, and hue_wave cycle through hues.
• Splash effects (splash, multisplash, solid_splash, solid_multisplash) react to key presses like reactive effects but with a splash pattern. solid_splash and solid_multisplash honor rgb color.
• Gradient effects (gradient_up_down, gradient_left_right) create a color gradient across the keyboard. They do not honor rgb color.
• Alphas mods (alphas_mods) colors modifier keys differently from alphanumeric keys. The colors are built-in and cannot be changed.

To set a permanent color, use solid_color and then rgb color <hex>.

Compatibility Aliases

Effect names are resolved independently for each target zone. Compatibility aliases are off → none, breathe → breathing, rainbow → spectrum for Logo/Side and rainbow_moving_chevron for Backlight, rainbow_wave → wave for Logo/Side, and solid → light for Logo/Side and solid_color for Backlight. The legacy static alias remains accepted as a compatibility alias for solid.

The effect catalog is consistent with the QMK RGB Matrix firmware. The keyboard implements the VIA protocol (version 3) and its 46 backlight effect names match the QMK RGB Matrix effect catalog exactly — verified through live testing. The animations are defined in QMK rgb_matrix/animations/, where each effect has its own header file (e.g. digital_rain_anim.h, solid_reactive_anim.h, riverflow_anim.h).

ID 39 is multisplash; ID 41 is the distinct solid_multisplash name.

rgb info reports a zones array with each zone's channel, enabled state, effect name and ID, brightness, speed, and color. The top-level enabled, mode, brightness, and speed fields summarize the first selected zone. If one zone cannot be queried, its record contains an error, other records are retained, and the process exits non-zero after printing the JSON.

Platform Setup

The tool uses hidapi for cross-platform HID access. Most platforms need no configuration, but Linux requires extra setup.

Linux

To build, libudev-dev is required:

sudo apt install -y libudev-dev

To run without sudo, grant your user group access to hidraw devices. By default, hidraw devices are owned by root (600). Choose one of the methods below.

Option 1: Quick (Per Session)

Grant your user group access to all HIDRAW devices:

sudo chown root:adm /dev/hidraw*
sudo chmod 660 /dev/hidraw*

This works for the current session only. Permissions reset after reboot.

Option 2: Permanent (udev Rule)

Create a persistent rule for the Impact 80:

echo 'SUBSYSTEM=="hidraw", ATTRS{idVendor}=="36b0", ATTRS{idProduct}=="309f", MODE="0660", GROUP="adm"' \
  | sudo tee /etc/udev/rules.d/99-qmk-rgb.rules

sudo udevadm control --reload-rules
sudo udevadm trigger
sudo udevadm reload

This makes the Impact 80 accessible to members of the adm group on every boot.

macOS

No setup required. macOS applications access HID devices directly through IOKit.

Windows

No setup required. Windows applications access HID devices directly through the Windows HID API.

After Linux setup, run the tool as your regular user (no sudo needed).

Supported Keyboards

Keyboard	VID	PID	Status
Wobkey Rainy 75	0x6666	0x0001	Supported
Wobkey Impact 80	0x36B0	0x309F	Supported

New keyboards can be added to keyboards.json.

CLI Reference

Command	Description
qmk-rgb keyboard info	Discover connected VIA-compatible keyboards
qmk-rgb rgb enable	Enable selected lighting zones
qmk-rgb rgb disable	Disable selected lighting zones
qmk-rgb rgb info	Show per-zone RGB state (JSON)
qmk-rgb rgb effect <name>	Set a zone-aware effect by name
qmk-rgb rgb brightness <val>	Set brightness (0–255) on selected zones
qmk-rgb rgb speed <val>	Set effect speed (0–255) on selected zones
qmk-rgb rgb color <hex>	Set color (e.g. ff0000) on selected zones
qmk-rgb rgb mode <index>	Set a raw zone-specific effect ID
qmk-rgb rgb --zone <zone> ...	Target logo, backlight, or side
qmk-rgb rgb --device <path> ...	Specify HID device path
qmk-rgb rgb save [name]	Save current RGB state to profiles/<name>.json
qmk-rgb rgb load [name]	Load and apply a profile from profiles/
qmk-rgb rgb list	List saved profiles
qmk-rgb rgb delete [name]	Delete a saved profile

Profiles

Profiles store RGB state (effect, brightness, speed, color) per zone as JSON files in the profiles/ directory. They are the only way to persist RGB settings across reboots. The keyboard's VIA protocol does not expose a standard command to save RGB state to internal EEPROM, so profiles rely on files instead.

Architecture

cmd/qmk-rgb/       # Cobra-based CLI
cmd/qmk-rgb/rgb/   # RGB subcommands
internal/device/  # HID discovery + keyboards.json loader
internal/hid/     # Cross-platform HID access (hidapi)
internal/rgb/     # Effects, colors, state
internal/via/     # VIA protocol implementation

Protocol

Communicates via the QMK Raw HID interface (Usage Page 0xFF60, Usage 0x61) with 32-byte feature reports.

• 0x07 — Custom set value
• 0x08 — Custom get value
• Lighting channels: 0x02 logo, 0x03 backlight, 0x04 side lighting
• RGB values: brightness 0x01, effect 0x02, speed 0x03, color 0x04