Inspired by the production-proven approach in dirkhh/adsb-feeder-image. 1. DNS spoofing for automatic captive-portal popup (Change 1 — Critical) Write /etc/NetworkManager/dnsmasq-shared.d/ledmatrix-captive.conf with address=/#/192.168.4.1 before nmcli connection up so NM's built-in dnsmasq (ipv4.method=shared) resolves every hostname to the AP IP. This triggers the OS captive-portal popup automatically on iOS / Android / Windows / macOS — no manual navigation to 192.168.4.1:5000/setup required. New helpers: _write_nm_dnsmasq_captive_conf / _remove_nm_dnsmasq_captive_conf. New constants: NM_DNSMASQ_SHARED_DIR / NM_DNSMASQ_SHARED_CONF. 2. Real internet connectivity check (Change 2 — High) Add _check_internet_connectivity() (ping 8.8.8.8 + HTTP fallback). check_and_manage_ap_mode() now considers a device "disconnected" when nmcli shows connected but no real internet reachability, matching adsb-feeder's multi-method gateway/DNS/HTTP test approach. 3. AP idle timeout (Change 3 — Medium) Track _ap_enabled_at timestamp in enable_ap_mode(). Add _has_ap_clients() using 'iw dev <iface> station dump'. check_and_manage_ap_mode() auto-disables AP after ap_idle_timeout_minutes (default 15) with no associated clients. 4. Wrong-password error feedback (Change 4 — Medium) _connect_nmcli() detects "Secrets were required" / "authentication rejected" in nmcli stderr and prefixes the message with "wrong_password: ". The /api/v3/wifi/connect route propagates error_type="wrong_password" in the JSON response. captive_setup.html shows "Incorrect password — try again" (keeping the form active) instead of the generic failure message. 5. Escalating watchdog NM restart (Change 5 — Low) wifi_monitor_daemon.py tracks _consecutive_internet_failures. After _nm_restart_threshold (5) consecutive checks where nmcli shows connected but internet is unreachable, restart NetworkManager as a recovery step. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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:
- Local: http://localhost:5000
- Network: http://:5000
Configuration
The web interface reads configuration from:
config/config.json- Main configurationconfig/config_secrets.json- API keys and secrets
API Documentation
The V3 API is mounted at /api/v3/ (app.py:144). For the complete
list and request/response formats, see
docs/REST_API_REFERENCE.md. Quick
reference for the most common endpoints:
Configuration
GET /api/v3/config/main- Get main configurationPOST /api/v3/config/main- Save main configurationGET /api/v3/config/secrets- Get secrets configurationPOST /api/v3/config/raw/main- Save raw main config (Config Editor)POST /api/v3/config/raw/secrets- Save raw secrets
Display & System Control
GET /api/v3/system/status- System statusPOST /api/v3/system/action- Control display (action body:start_display,stop_display,restart_display_service,restart_web_service,git_pull,reboot_system,shutdown_system,enable_autostart,disable_autostart)GET /api/v3/display/current- Current display frameGET /api/v3/display/on-demand/status- On-demand statusPOST /api/v3/display/on-demand/start- Trigger on-demand displayPOST /api/v3/display/on-demand/stop- Clear on-demand
Plugins
GET /api/v3/plugins/installed- List installed pluginsGET /api/v3/plugins/config?plugin_id=<id>- Get plugin configPOST /api/v3/plugins/config- Update plugin configurationGET /api/v3/plugins/schema?plugin_id=<id>- Get plugin schemaPOST /api/v3/plugins/toggle- Enable/disable pluginPOST /api/v3/plugins/install- Install from registryPOST /api/v3/plugins/install-from-url- Install from GitHub URLPOST /api/v3/plugins/uninstall- Uninstall pluginPOST /api/v3/plugins/update- Update plugin
Plugin Store
GET /api/v3/plugins/store/list- List available registry pluginsGET /api/v3/plugins/store/github-status- GitHub authentication statusPOST /api/v3/plugins/store/refresh- Refresh registry from GitHub
Real-time Streams (SSE)
SSE stream endpoints are defined directly on the Flask app
(app.py:607-619 — includes the CSRF exemption and rate-limit hookup
alongside the three route definitions), not on the api_v3 blueprint:
GET /api/v3/stream/stats- System statistics streamGET /api/v3/stream/display- Display preview streamGET /api/v3/stream/logs- Service logs stream
Development
When making changes to the web interface:
- Edit files in this directory
- Test changes by running
python3 web_interface/start.py - 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