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README.md

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+# Jetson Edge Counter (Production)
+
+RTSP + YOLO TensorRT line-crossing counter for edge Jetson. Replaces MQTT `frigate-counter` on site.
+
+## Architecture
+
+- **Input:** Direct LAN camera RTSP (low latency)
+- **Inference:** YOLO11n `.engine` (TensorRT) on Jetson GPU
+- **Logic:** Line crossing (`ayam` count, `talenan` closes batch) via `batch_store.py`
+- **Output:** `jetson_counter.db` + `current_batch.json`
+- **Dashboard:** Flask on port **5000**
+
+Batch lifecycle: talenan closes batch → idle until next ayam line cross (count starts at 1).
+
+## Deploy
+
+See **[DEPLOY.md](DEPLOY.md)**.
+
+| Item | Default |
+|------|---------|
+| Install path | `/opt/jetson-counter` |
+| Venv | `/opt/jetson-counter/venv` |
+| DB | `/opt/jetson-counter/jetson_counter.db` |
+| Dashboard | `http://<jetson-ip>:5000` |
+| Cutoff | `20:00` |
+
+## Commands
+
+| Command | Purpose |
+|---------|---------|
+| `sudo systemctl status jetson-counter` | Counter running? |
+| `sudo journalctl -u jetson-counter -f` | Live logs |
+| `sudo systemctl restart jetson-counter` | After `.env` change |
+| `sudo ./uninstall-services.sh` | Remove services |
+
+## Key env vars
+
+| Variable | Purpose |
+|----------|---------|
+| `SOURCE` | Direct camera RTSP URL |
+| `MODEL_PATH` | `.engine` file path |
+| `IMGSZ` / `HALF` | Must match engine export |
+| `CROSS_DIRECTION` | `rtl` (default), `ltr`, or `both` |
+| `LINE_X` / `LINE_X_FRAC` | Counting line position |
+
+## Files
+
+| File | Purpose |
+|------|---------|
+| `counter_live.py` | RTSP + YOLO + line crossing |
+| `batch_store.py` | SQLite persistence |
+| `counter_dashboard.py` | Flask UI |
+| `config.env.example` | Env template |
+| `jetson-counter.service` | Counter systemd unit |
+| `install-services.sh` | Install + disable legacy MQTT counter |
+
+## Dev stack
+
+Lab / comparison: [`jetson-counter-dev/`](../jetson-counter-dev/) (port 8081, separate DB).