# Control

PHP based control panel for fan control, system monitoring, WiFi control, WakeLock, and Web Push notifications.

## Main Features

- Authenticated dashboard for fan, sensor, notice, WiFi, WakeLock, and Push subscription status.
- Background collection and policy application for fan state.
- WebSocket status updates with HTTP fallback.
- Web Push subscription registration, recovery, and notice delivery.

## Main APIs

- `public/api.php?action=status`
- `public/api.php?action=collect`
- `public/api.php?action=fan`
- `public/api.php?action=wifi`
- `public/api.php?action=push_devices`

## Structure

- `public/index.php`: management UI.
- `public/api.php`: status and control API.
- `config/config.php`: DB, auth, CSRF, push, and shell helpers.
- `config/vapid.php`: VAPID bridge loaded from external secret config.
- `apply_policy.php`: CLI/cron fan policy application.
- `bin/control_ws.php`: WebSocket server.

## Secrets

Runtime secrets are loaded from `/home/seo/secret/control.php`. Do not commit that file.

Expected values include the app password, DB settings, and VAPID keys.

## Operations

- Keep sensor collection cadence aligned with DB growth.
- Confirm fan sysfs paths after hardware or OS changes.
- Keep VAPID keys and app password outside the repository.