Pulsar Mouse

Bar and desktop widgets showing battery percentage and charging status (plus signal strength in the bar widget's tooltip) for a Pulsar gaming mouse (via pulsar-mouse-linux), plus a quick-controls panel - with a profile switcher, on a mouse with more than one onboard profile - covering DPI stage, polling rate, debounce, angle snap, ripple control, motion sync, lift-off distance, LED (effect/brightness/speed), and - on wireless mice - power saving/low-battery threshold. Since desktop widgets are shared with Noctalia's lock screen, the desktop widget shows up in both places once added. Works with just the pulsar-mouse CLI installed - the GUI/tray isn't required, it's just more efficient if it's running (see Data source).

Battery/signal only apply to wireless mice - on a wired one, the bar widget shows a plain neutral glyph (still clickable, to reach the panel) and the desktop widget shows a plain "Wired" placeholder instead. The controls panel's Sensor, Advanced, and Lighting tabs work for any mouse; the Power tab (wireless power saving, low-battery threshold) only appears for a wireless one.

Plugin

Field	Value
ID	harveywuk/pulsar-mouse
Entries	Bar widget: bar; panel: controls; desktop widget: battery

Requirements

• pulsar-mouse-linux installed, with pulsar-mouse on PATH - every entry in this plugin shells out to it directly (see Notes for the full network/filesystem/process disclosure)
• pulsar-mouse-gui running is optional but recommended (autostart) - see Data source

Usage

Updating

noctalia msg plugins update <source> only re-syncs files from a path/git source - it does not re-register a plugin's entries (bar widget, panel, etc). If an update adds or changes an entry, do a full disable/enable cycle afterward to pick it up:

noctalia msg plugins update pulsar-mouse   # or whatever you named the source
noctalia msg plugins disable harveywuk/pulsar-mouse
noctalia msg plugins enable harveywuk/pulsar-mouse

Bar Widget

Add the bar bar widget to your bar. Shows a battery glyph, icon-only, with a tooltip for the full status (percentage, charging, signal strength when available) - the glyph is the only thing rendered regardless of bar orientation; the glyph turns a secondary accent color while charging, or red once battery drops to the mouse's configured Low Power Mode threshold (see Controls Panel; falls back to 15% on a driver that doesn't expose that threshold, e.g. nordic.py). On a wired mouse (no battery to show) it stays visible as a plain neutral glyph rather than hiding, since it's the only way to open the controls panel - DPI/lighting controls still work on a wired mouse, only the Power tab doesn't apply. If pulsar-mouse-gui isn't installed or running at all, this widget still works, it just always reads a fresh value directly from the mouse instead of the GUI's cached one (see Data source).

Controls Panel

Click the bar widget to open the controls panel. A Profile dropdown at the top (hidden on a single-profile mouse) switches the mouse's active profile - picking one calls --active-profile N and refreshes every field below, since profile switches affect essentially everything shown, not just DPI/LED. Below that, tabs (Noctalia has no native tabs control - these are just segmented buttons swapping which section renders):

Sensor

• DPI - a slider stepping through the active profile's configured DPI stages (not a raw DPI range - every position lands on an actual configured value, like a notch per stage)
• Polling Rate - a slider the same way, stepping through the device's supported rates
• Lift-off Distance - a slider, in mm (only shown for a driver with a continuous LOD range, like the Feinmann 8K's 0.7-2.0mm in 0.1mm steps - a driver with a fixed discrete LOD list instead isn't currently supported by this panel)

Advanced

• Debounce - a slider, in ms
• Angle Snap, Ripple Control, Motion Sync - toggles

Lighting

• LED Effect - a dropdown (off/steady/breathe, or whatever the device supports)
• Brightness - a 0-100% slider
• Speed - a 0-100 slider for the LED effect's speed, shown only when the current effect actually has one (e.g. breathe, not steady)

Power (wireless mice only)

• Wireless Power Saving - a slider, 30s-15min, shown as M:SS
• Low Power Mode - a slider, 0-100% battery threshold

All of these write straight through the pulsar-mouse CLI immediately on release (sliders commit on drag-end, not live per pixel) - unlike the battery reading, none of this lives in the cached state file, so the panel always talks to the mouse directly.

You can also open the panel over IPC:

noctalia msg panel-toggle harveywuk/pulsar-mouse:controls

Desktop Widget

Add the battery desktop widget from Noctalia's desktop-widget editor (it's then also available for the lock-screen widget editor).

Data source

The bar and battery entries both read battery percentage/charging/low-power-threshold from the reading pulsar-mouse-gui already writes on its periodic poll (~/.cache/pulsar-mouse/battery.json) rather than polling the mouse themselves, so they don't double up on USB traffic. If that file is missing or older than 3 minutes - the GUI isn't installed, isn't running, or was just closed - each falls back to its own direct pulsar-mouse --battery-json call instead, so both still work standalone, just with their own USB round-trip each tick. Signal strength is bar-only (the desktop widget doesn't currently show it) and has no synchronous getter besides - it only ever arrives via an async event the GUI listens for, so it's only available through the cached file, never the CLI fallback. The low-power threshold, unlike signal, does have a synchronous getter, so it's available via both paths, for both entries.

Settings

Bar Widget

Setting	Type	Default	Description
glyph_size	int	16	Glyph size, 10-32.

Desktop Widget

Setting	Type	Default	Description
color	color	primary	Accent color for the percentage text and progress bar.
show_progress	bool	true	Shows or hides the battery-level progress bar.
show_percent	bool	true	Turn off to rely on just the glyph and progress bar.
glyph_size	int	28	Glyph size, 16-64.

Notes

• No network access. Every entry talks only to the local pulsar-mouse CLI (a spawned process, never a daemon) and, for the bar/desktop widgets, reads a local cache file.
• Spawns pulsar-mouse for every read and write - DPI/polling/LED/etc. changes in the controls panel, and the battery-json fallback read in the bar/desktop widgets when the cache is stale or missing.
• Writes nothing itself. ~/.cache/pulsar-mouse/battery.json is written by pulsar-mouse-gui (a separate program from this plugin, part of the same pulsar-mouse-linux project) on its own periodic poll - this plugin only ever reads that file, never writes it.
• Requires Wayland/Hyprland (or another wlroots-based compositor) like the rest of Noctalia - no compositor-specific behavior beyond that in this plugin itself.