Existing readings, local events.
Cello listens to BlueZ's local cache. It does not scan, pair, connect, read GATT characteristics or write HID commands. The widget has no recurring polling timer.
Cello · GNOME Shell 46 · Public preview
Device batteries.
At a glance.
Bluetooth keyboards, mice, headphones and controllers, together on your desktop. Charge rings and clear percentages in a small card that picks up the colors of your wallpaper.
First public preview0.1.0-rc.1 · GPL-3.0-or-later
Current targetLinux · GNOME Shell 46
LanguagesEnglish and Italian
A small desktop companion
The useful number, where you can see it.
Up to six connected devices, automatic wrapping and four corner positions. Unknown levels stay unknown; an optional Keychron bridge keeps its estimate visibly marked with ~.
Light, dark or automatic.
Choose the appearance yourself or let it follow the wallpaper beneath the card. The image is decoded asynchronously into a cached thumbnail; unchanged readings keep the same actors.
A native menu.
Right-click the card or use ⋮ to choose a corner, change appearance or refresh the local cache. The card sits above the desktop icon surface and below ordinary application windows.
Install the preview
A GNOME extension, ready to inspect.
The ZIP and checksums are available on GitHub. GNOME Extensions submission #11286 is awaiting review. Store installation is not yet available.
- Check that your desktop uses GNOME Shell 46.
- Download the
.shell-extension.zipandSHA256SUMSfrom the release and verify the checksum. - Install the ZIP, log out and back in, then enable Cello in Extensions.
gnome-extensions install --force keychron-batteries-widget@fglabs.local.shell-extension.zipWhat was checked
Evidence with its limits attached.
CI and an isolated GNOME 46 session cover menu pointer events, placement, optional bridge lifecycle, stale readings, automatic contrast and cleanup. A local 22-second idle observation counted zero additional BlueZ snapshots and zero widget rebuilds. It is not a measurement of watts, CPU/RAM overhead or device autonomy.
Installed-session Wayland, real multi-monitor and HiDPI qualification remain open. BlueZ and an optional external Keychron bridge have independent behavior. The bridge is not bundled or required for ordinary Bluetooth devices.
Read the release devlog →