# Edge deployment (Raspberry Pi 5, air-gapped / 폐쇄망)

Offline-installable bundle + systemd unit for the `move-detect` edge daemon.
The bundle is fully self-contained (all wheels + pose model + source): the Pi
performs **zero network fetches** at install or run time. The only runtime
network use is the cloud POST / config-poll / heartbeat, and even that tolerates
being offline (events buffer in the local sqlite queue and flush on reconnect).

> Scope: this covers the **CPU MoveNet + USB (UVC) webcam** path — the one the
> daemon wires today (`edge/daemon.py:main`) and the one verified end-to-end.
> Hailo-8 acceleration (`edge/adapters/hailo_pose.py`) and the CSI camera
> (`edge/adapters/picamera_source.py`) are separate device-validated paths — see
> `docs/hardware-bringup.md`.

## Files

| File | Runs on | Purpose |
|------|---------|---------|
| `bundle/build_offline_bundle.sh` | build machine (has internet) | downloads wheels + model, stages source, emits one tarball |
| `bundle/install_offline.sh` | the Pi (no internet) | venv + `--no-index` install, systemd unit, service account |
| `systemd/move-detect-edge.service` | the Pi | the daemon unit (auto-restart, device access, hardening) |
| `systemd/move-detect-edge.env.example` | the Pi | env template → `/etc/move-detect/edge.env` |

## 1. Build the bundle (on a machine WITH internet)

**Most reliable: build on an aarch64 host** (a Pi 5, or an arm64 CI runner) so the
downloaded wheels match the target exactly:

```bash
deploy/bundle/build_offline_bundle.sh            # native aarch64 wheels
```

From an x86 box you can attempt a cross build (best-effort — onnxruntime/opencv
wheel tags may not resolve; if it fails, build natively):

```bash
deploy/bundle/build_offline_bundle.sh --cross    # target aarch64 / cp311
```

Output: `dist/move-detect-edge-bundle-aarch64-cp311.tar.gz` (+ `MANIFEST.txt`
listing the bundled wheels). This single file crosses the air gap.

## 2. Transfer + install (on the air-gapped Pi)

Copy the tarball across the gap (USB, one-way transfer, etc.), then:

```bash
tar xzf move-detect-edge-bundle-aarch64-cp311.tar.gz
cd move-detect-edge-bundle
sudo ./install_offline.sh
```

The installer: creates the `movedetect` service account (in `video`/`render`/
`plugdev`/`hailo` groups), lays down source + model under `/opt/move-detect`,
builds a venv and installs the bundled wheels with `--no-index`, verifies the
package imports, seeds `/etc/move-detect/edge.env`, and installs the systemd unit.

## 3. Configure + start

```bash
sudo nano /etc/move-detect/edge.env      # DEVICE_ID, DEVICE_SECRET, CAFE24_URL, ...
sudo systemctl enable --now move-detect-edge
journalctl -u move-detect-edge -f
```

`DEVICE_ID`/`DEVICE_SECRET` must match a `devices` row in the cloud (see
`cloud/docs/cloud-deploy.md` §6). `MOVENET_ONNX` should point at the bundled
model (`/opt/move-detect/models/movenet_lightning.onnx`).

## 4. Verify the air gap (do this before trusting a build)

- [ ] On a host with **networking disabled**, `install_offline.sh` completes —
      the `--no-index` installs prove nothing is fetched. If pip tries to reach
      PyPI, a wheel is missing from the bundle: rebuild (step 1) natively.
- [ ] Step [4/6] of the installer prints `edge import OK` (onnxruntime + cv2 +
      numpy + requests all import from the venv).
- [ ] `systemctl status move-detect-edge` is `active (running)`; the log shows
      frames processed and (if the cloud is reachable) heartbeats.
- [ ] Pull the network cable → events keep queueing (`QUEUE_DB` grows) → restore
      → the queue flushes. (End-to-end behavior verified in the edge e2e harness.)

## Hailo-8 HAT + CSI camera path (optional, faster)

The default bundle runs CPU MoveNet + USB webcam. To use the Hailo-8 accelerator
and/or a CSI camera, add these SYSTEM packages on the Pi (they are apt packages, not
pip wheels — the venv sees them because it is created with `--system-site-packages`):

```bash
sudo apt install -y hailo-all python3-picamera2 python3-opencv
```

- `hailo-all` — HailoRT runtime + driver + the Python `hailo_platform` bindings.
- `python3-picamera2` — CSI camera stack (libcamera).

Then place the pose model and switch backends in `/etc/move-detect/edge.env`:

```ini
POSE_BACKEND=hailo
HAILO_HEF=/opt/move-detect/models/yolov8s_pose.hef   # copy the compiled HEF here
CAMERA_BACKEND=csi
CSI_DEVICE=0
```

Validate on device per `docs/hardware-bringup.md` before trusting output (the Hailo
decode is unit-locked, but the HailoRT inference + picamera2 color order are hardware-
validated). USB webcam stays available anytime via `CAMERA_BACKEND=uvc`.

> **Air gap:** `hailo-all` / `python3-picamera2` are the ONE piece this bundle can't
> carry (Hailo's own driver + apt tree). Pre-install them on the Pi image, or transfer
> their `.deb`s separately, before running `install_offline.sh`. The pose HEF is
> likewise supplied out-of-band (compiled from the Hailo Model Zoo).

## Not bundled (by design)

- **MySQL / the cloud app** — a separate host; see `cloud/docs/cloud-deploy.md`.
- **HailoRT + `yolov8s_pose.hef` + picamera2** — Hailo's runtime/driver, the compiled
  HEF, and the CSI camera stack are Pi system packages installed out-of-band (above);
  the default CPU MoveNet + USB path needs none of them.