Initial car project import

README.md

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+# Car
+
+PHP based vehicle service for state collection, TCP command dispatch, monitoring, and mobile data usage display.
+
+## Main Features
+
+- Vehicle status collection and storage.
+- TCP command dispatch for allowed vehicle commands.
+- Monitoring UI with separated status and usage AJAX endpoints.
+- Data usage and billing display with adjustment metadata.
+- TCP failure reason and receive freshness metadata.
+
+## Main APIs
+
+- `api.php?action=status`
+- `api.php?action=command`
+- `monitor.php?mode=ajax`
+- `monitor.php?mode=usage`
+
+## Structure
+
+- `api.php`: vehicle status and control API.
+- `monitor.php`: monitoring UI and AJAX responses.
+- `common.php`: external secret loading and shared DB/API helpers.
+- `collector_se.php`: CLI/cron state collector.
+- `sw.js`: service worker.
+- `assets/`: icons and static assets.
+
+## Secrets
+
+Runtime settings are loaded from `/home/seo/secret/car.php`. Do not commit that file.
+
+Expected values include TCP settings, DB credentials, API token, and allowed IP policy.
+
+## Security
+
+- Vehicle API uses API token or allowed IP policy.
+- Control commands are limited to known command codes.
+- Secret files must remain outside the repository with restricted permissions.
+