209 lines
5.4 KiB
Markdown
209 lines
5.4 KiB
Markdown
# Spectra
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Display random Unsplash photos on an Inky Impression e-paper display, with a web
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interface for uploading your own images.
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---
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- [Requirements](#requirements)
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- [Quick start](#quick-start)
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- [Configuration](#configuration)
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- [Display orientation](#display-orientation)
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- [MQTT](#mqtt)
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- [Usage](#usage)
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- [Display loop](#display-loop)
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- [Web interface](#web-interface)
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- [systemd services](#systemd-services)
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- [Running tests](#running-tests)
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- [Project structure](#project-structure)
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---
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## Requirements
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- Raspberry Pi with GPIO
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- [Pimoroni Inky Impression](https://shop.pimoroni.com/products/inky-impression) (4.0", 7.3", or 13.3")
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- Python 3.9+
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- [Unsplash API access key](https://unsplash.com/developers)
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## Quick start
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```bash
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# Install
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cp config.example.yaml config.yaml # edit with your Unsplash key
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pip install -r requirements.txt
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pip install -e .
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# Run once in simulation mode
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spectra --once --simulate
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# Start the web interface
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spectra web
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# Run the display loop continuously
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spectra
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```
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Or on a Pi with systemd:
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```bash
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sudo ./install.sh
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sudo systemctl start spectra spectra-web
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```
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## Configuration
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spectra looks for `config.yaml` in this order:
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1. `$PWD/config.yaml`
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2. `~/.config/spectra/config.yaml`
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3. `/etc/spectra/config.yaml`
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Pass a custom path with `spectra -c /path/to/config.yaml`.
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```yaml
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unsplash:
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access_key: "your_access_key_here"
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query: "nature"
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collections: ""
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display:
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saturation: 0.5
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orientation: 0
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resolution:
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width: 1600
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height: 1200
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schedule:
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interval_hours: 1
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random_delay_seconds: 300
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mqtt:
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enabled: false
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broker: localhost
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port: 1883
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topic_prefix: spectra
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client_id: spectra-display
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username: ""
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password: ""
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paths:
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cache: /var/cache/spectra
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```
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### Display orientation
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Set `display.orientation` to match how the panel is physically mounted. The
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Unsplash orientation filter (`landscape`/`portrait`/`squarish`) is derived
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automatically — the old `unsplash.orientation` config key is ignored.
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| Value | Unsplash filter | Effect |
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|-------|----------------|--------|
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| 0 | landscape | Default horizontal mount |
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| 90 | portrait | Vertical mount |
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| 180 | landscape | Upside-down horizontal |
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| 270 | portrait | Upside-down vertical |
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Images are cropped to the effective aspect ratio, resized, then rotated for the
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physical panel. Preview and thumbnails reflect the configured orientation.
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Change it live from Settings > Display Orientation or via config hot-reload.
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### MQTT
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When enabled, the display loop subscribes to `{prefix}/command/#` and publishes
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status to `{prefix}/status`. See [MQTT integration docs](docs/mqtt.md) for
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commands, Home Assistant examples, and debugging.
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## Usage
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### Display loop
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```bash
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spectra # run continuously
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spectra --once # fetch one photo and exit
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spectra --once --simulate # save to /tmp/spectra_last.png
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spectra --simulate --width 800 --height 480
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spectra -c /path/to/config.yaml
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```
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### Web interface
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```bash
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spectra web # http://0.0.0.0:5000
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spectra web --port 8080
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spectra web -v # verbose (debug mode only on localhost)
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```
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| Page | What it does |
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|------|-------------|
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| **Dashboard** | Display status, schedule, quick actions (refresh, clear) |
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| **Gallery** | Browse images, trigger "show now", delete |
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| **Upload** | Drag-and-drop multi-file upload with progress |
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| **Settings** | Live-edit Unsplash, display, schedule, MQTT |
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| **Preview** | See how an image looks on the display |
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## systemd services
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Two units are installed by `install.sh`:
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- `spectra.service` — display loop
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- `spectra-web.service` — web interface
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```bash
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sudo systemctl start spectra
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sudo systemctl stop spectra-web
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journalctl -u spectra -f
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journalctl -u spectra-web -f
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```
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## Running tests
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```bash
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pip install -e ".[dev]"
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pytest tests/
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```
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107 tests covering config loading, display processing (crop, resize, rotation),
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trigger atomicity, MQTT parsing, and all 19 API routes.
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## Project structure
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```
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spectra/
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├── config.example.yaml
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├── .gitignore
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├── install.sh
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├── pyproject.toml
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├── requirements.txt
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├── spectra/
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│ ├── cli.py # CLI, display loop, config hot-reload
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│ ├── config.py # Config loader with deep-merge
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│ ├── config_manager.py # Config read/write
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│ ├── display.py # Image processing, rotation, hardware abstraction
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│ ├── fetcher.py # Unsplash API client
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│ ├── library.py # Unsplash image caching to SQLite
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│ ├── mqtt.py # MQTT client (commands + heartbeat)
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│ ├── trigger.py # Thread-safe trigger file (web → display loop)
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│ └── web/
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│ ├── server.py # Flask app, 19 API routes
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│ ├── models.py # SQLAlchemy models
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│ ├── templates/ # 6 Jinja2 pages
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│ └── static/ # CSS + JS
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├── tests/
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│ ├── test_api.py
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│ ├── test_config.py
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│ ├── test_display.py
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│ ├── test_gallery.py
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│ ├── test_mqtt.py
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│ ├── test_orientation.py
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│ ├── test_trigger.py
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│ └── conftest.py
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├── systemd/
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│ ├── spectra.service
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│ └── spectra-web.service
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└── docs/
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├── display-orientation.md
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├── web-interface.md
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└── mqtt.md
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```
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