dotmatrix-unlocked

Turn a cheap iDotMatrix-compatible 32×32 Bluetooth LED panel into a desk companion, run from your computer with a local web UI.

• Dashboard: 16 modules (big, analog or binary clock, weather, 8-hour forecast, sunrise/sunset, moon phase, week, month, day progress, now playing, live Claude Code activity…). Start from 12 ready-made screens, or rearrange, restyle and save your own.
• Skins: album art, a spinning vinyl, any GIF (16 built-in animations, GIPHY, or your own: GIFs are re-tuned for LEDs with sharper shrinking, contrast stretch and no dither noise), a Winamp-style visualizer, and a mischievous pixel cat that reacts to what you're doing and does tricks on request.
• Live: Snake, Tetris, Breakout, 2048 and Flappy; YouTube or local video; a countdown timer; quick messages.
• Everything previews in the browser first and only goes to the panel when you press Apply.

Not affiliated with iDotMatrix. Tested on a 32×32 IDM-* panel; other sizes aren't supported yet.

Install

Needs Python 3.12+ and Bluetooth.

uv tool install dotmatrix-unlocked     # or: pipx install dotmatrix-unlocked
dotmatrix                              # starts it and opens http://127.0.0.1:7766

Don't have uv? See docs.astral.sh/uv, or use pipx.

In the web UI, click Find my panel. Turn the panel on first and close its phone app: the panel accepts only one Bluetooth connection.

No panel? dotmatrix run --fake runs everything with the browser preview standing in for the display.

Then, optionally:

dotmatrix service install   # start at login, restart if it crashes
dotmatrix hooks install     # show Claude Code activity (edits ~/.claude/settings.json, keeps a .bak)
dotmatrix doctor            # checks everything and prints the fix for anything missing

Platforms

Windows support is new and less tested. Reports are welcome.

macOS: the first connection asks for Bluetooth permission for Python. If it was denied, enable it in System Settings › Privacy & Security › Bluetooth. Raspberry Pi / headless Linux: after dotmatrix service install, run loginctl enable-linger $USER so the service starts without anyone logging in.

Privacy

• The web UI and API listen on 127.0.0.1 only. Requests must come from that host and be JSON, so other websites can't drive your panel.
• The microphone (visualizer, clap-to-startle the cat) is off by default. It runs inside your browser, and only 16 loudness levels are sent to the local service; no audio leaves the browser.
• Network calls: Open-Meteo for weather (only once you set a city), GIPHY if you add a key, and video links you paste.

Command line

dotmatrix                     start + open the web UI
dotmatrix run [--fake]        foreground
dotmatrix scene "HELLO" --ttl 10 --color 255,200,0
dotmatrix status
dotmatrix scan | hello | test | image PATH | brightness PCT   # direct to the panel, service stopped

The local HTTP API (POST /scene, /event, /game, /timer, /cat…) is what the web UI uses. Anything on your machine can push to the panel with a curl.

Development

git clone https://github.com/anishsrinivasan/dotmatrix-unlocked && cd dotmatrix-unlocked
uv sync --group dev
uv run pytest            # runs every module's self-check + the app end to end in --fake mode
uv run dotmatrix run --fake

• Add a game: subclass Game in game.py and add it to GAMES.
• Add a dashboard module: write a draw function and add it to MODULES in render.py.
• Add a visualizer style (skins.py) or a cat trick (cat.py): same idea.

The web UI picks all of these up automatically.

License

GPL-3.0-or-later. It builds on python3-idotmatrix-library, which is also GPL-3.0.