Files
LEDMatrix/web_interface
Chuck 7afc2c0670 fix(web): increase chain_length max from 8 to 32 (#300)
* fix(web): increase chain_length max from 8 to 32

The web UI form input capped chain_length at 8 panels, preventing
users with larger displays (e.g. 16-panel setups) from configuring
their hardware through the UI. The backend API had no such limit.

Changed max="8" to max="32" to support large display configurations.
Added panel count example to the help text.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix(web): add server-side bounds validation for display hardware fields

The API endpoint at /api/v3/config/main accepted any integer value for
display hardware fields (chain_length, rows, cols, brightness, etc.)
without bounds checking. Only the HTML form had min/max attributes,
which are trivially bypassed by direct API calls.

Added _int_field_limits dict with bounds for all integer hardware fields:
  chain_length: 1-32, parallel: 1-4, brightness: 1-100,
  rows: 8-128, cols: 16-128, scan_mode: 0-1, pwm_bits: 1-11,
  pwm_dither_bits: 0-2, pwm_lsb_nanoseconds: 50-500,
  limit_refresh_rate_hz: 0-1000, gpio_slowdown: 0-5

Out-of-bounds or non-integer values now return 400 with a clear error
message (e.g. "Invalid chain_length value 99. Must be between 1 and 32.")
before any config is persisted. Follows the same inline validation
pattern already used for led_rgb_sequence, panel_type, and multiplexing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix(api): strict int validation and add max_dynamic_duration_seconds bounds

Reject bool/float types in _int_field_limits validation loop to prevent
silent coercion, and add max_dynamic_duration_seconds to the validation
map so it gets proper bounds checking instead of a raw int() call.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-29 20:17:14 -04:00
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LED Matrix Web Interface V3

Modern, production web interface for controlling the LED Matrix display.

Overview

This directory contains the active V3 web interface with the following features:

  • Real-time display preview via Server-Sent Events (SSE)
  • Plugin management and configuration
  • System monitoring and logs
  • Modern, responsive UI
  • RESTful API

Directory Structure

web_interface/
├── app.py                    # Main Flask application
├── start.py                  # Startup script
├── run.sh                    # Shell runner script
├── requirements.txt          # Python dependencies
├── blueprints/               # Flask blueprints
│   ├── api_v3.py            # API endpoints
│   └── pages_v3.py          # Page routes
├── templates/                # HTML templates
│   └── v3/
│       ├── base.html
│       ├── index.html
│       └── partials/
└── static/                   # CSS/JS assets
    └── v3/
        ├── app.css
        └── app.js

Running the Web Interface

Standalone (Development)

From the project root:

python3 web_interface/start.py

Or using the shell script:

./web_interface/run.sh

As a Service (Production)

The web interface can run as a systemd service that starts automatically based on the web_display_autostart configuration setting:

sudo systemctl start ledmatrix-web
sudo systemctl enable ledmatrix-web  # Start on boot

Accessing the Interface

Once running, access the web interface at:

Configuration

The web interface reads configuration from:

  • config/config.json - Main configuration
  • config/secrets.json - API keys and secrets

API Documentation

The V3 API is available at /api/v3/ with the following endpoints:

Configuration

  • GET /api/v3/config/main - Get main configuration
  • POST /api/v3/config/main - Save main configuration
  • GET /api/v3/config/secrets - Get secrets configuration
  • POST /api/v3/config/secrets - Save secrets configuration

Display Control

  • POST /api/v3/display/start - Start display service
  • POST /api/v3/display/stop - Stop display service
  • POST /api/v3/display/restart - Restart display service
  • GET /api/v3/display/status - Get display service status

Plugins

  • GET /api/v3/plugins - List installed plugins
  • GET /api/v3/plugins/<id> - Get plugin details
  • POST /api/v3/plugins/<id>/config - Update plugin configuration
  • GET /api/v3/plugins/<id>/enable - Enable plugin
  • GET /api/v3/plugins/<id>/disable - Disable plugin

Plugin Store

  • GET /api/v3/store/plugins - List available plugins
  • POST /api/v3/store/install/<id> - Install plugin
  • POST /api/v3/store/uninstall/<id> - Uninstall plugin
  • POST /api/v3/store/update/<id> - Update plugin

Real-time Streams (SSE)

  • GET /api/v3/stream/stats - System statistics stream
  • GET /api/v3/stream/display - Display preview stream
  • GET /api/v3/stream/logs - Service logs stream

Development

When making changes to the web interface:

  1. Edit files in this directory
  2. Test changes by running python3 web_interface/start.py
  3. Restart the service if running: sudo systemctl restart ledmatrix-web

Notes

  • Templates and static files use the v3/ prefix to allow for future versions
  • The interface uses Flask blueprints for modular organization
  • SSE streams provide real-time updates without polling