# led-controller

LED controller web app for managing profiles, **zones**, presets, and colour palettes, and sending commands to LED devices over **ESP-NOW** (binary wire format).

- **Bridge ESP32**: runs a WebSocket server; the Pi connects as client (`bridge_ws_url` in `settings.json`, e.g. `ws://192.168.4.1/ws`).
- **LED drivers**: announce on boot via ESP-NOW broadcast; the controller registers them and pushes group membership.
- Architecture (diagrams): [docs/espnow-architecture.md](docs/espnow-architecture.md)
- Wire format (byte layouts): [docs/espnow-binary-protocol.md](docs/espnow-binary-protocol.md) (≤250 bytes per frame, no JSON on the wire)

## Run

- One-time setup for port 80 without root: `sudo scripts/setup-port80.sh`
- Start app: `pipenv run run` (override listen port with the **`PORT`** environment variable)
- Dev watcher (auto-restart on `src/` changes): `pipenv run dev`
- Regenerate **`docs/help.pdf`** from **`docs/help.md`**: `pipenv run help-pdf` (requires **pandoc** and **chromium** on the host)

## UI modes

- **Run mode**: focused control view. Select zones/presets and apply profiles. Editing actions are hidden.
- **Edit mode**: management view. Shows **Zones**, Presets, Patterns, Colour Palette, and Send Presets controls, plus per-tile preset edit/remove and drag-reorder.

## Profiles

- Applying a profile updates session scope and refreshes the active zone content.
- In **Run mode**, Profiles supports apply-only behaviour (no create/clone/delete).
- In **Edit mode**, Profiles supports create/clone/delete.
- Creating a profile always creates a populated `default` zone (starter presets).
- Optional **DJ zone** seeding creates:
  - `dj` zone bound to device name `dj`
  - starter DJ presets (rainbow, single colour, transition)

## Preset colours and palette linking

- In preset editor, selecting a colour picker value auto-adds it when the picker closes.
- Use **From Palette** to add a palette-linked preset colour.
- Linked colours are stored as palette references and shown with a `P` badge.
- When profile palette colours change, linked preset colours update across that profile.

## API docs

- Main API reference: `docs/API.md`

## Driver pattern modules

Pattern **`.py`** sources live under **`led-driver/src/patterns`**. The Pi app resolves that path via `util.driver_patterns.driver_patterns_dir()`. If you deploy without that tree next to the app, set **`LED_CONTROLLER_PATTERNS_DIR`** to the directory that contains those files.