2026-08-05 14:10:14 +00:00
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# pi5-camera-webui
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2026-08-05 23:16:25 +09:00
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Camera service for a Raspberry Pi 5: a live video feed served over a small web UI, with face
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recognition planned as a later stage.
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Developed on the machine it runs on (`pi5`), with Codex as the coding client — see [AGENTS.md](AGENTS.md).
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## Hardware
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| Board | Raspberry Pi 5 Model B Rev 1.1 |
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| OS | Debian 12 (bookworm), aarch64 |
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| Camera | Pi camera module, connected to a CAM port |
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| Host | `pi5`, `192.168.2.154` |
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## ⚠ Current state: the camera is NOT detected
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Nothing is built yet, and **the camera is not visible to the system**, so start here:
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```console
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$ rpicam-hello --list-cameras
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No cameras available!
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```
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This is a *detection* problem, not a software one — the userland is already in place:
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- `camera_auto_detect=1` is set in `/boot/firmware/config.txt` (the correct default; nothing to add)
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- 12 `libcamera`/`rpicam` packages are installed
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- **`dmesg` contains no camera probe lines at all** — no sensor (`imx*`, `ov5647`), no CFE
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That last point is the diagnostic one. A camera that is seen but misconfigured still leaves probe
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messages; **silence means the sensor is not being reached electrically.** So check the physical
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connection before changing any config:
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1. The Pi 5 has **two CAM/DISP connectors, and they are interchangeable in shape** — a camera in a
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DISP port looks correctly seated and will never appear.
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2. Ribbon **orientation**: contacts face the correct side at both ends (the board end and the camera
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end are not the same way round).
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3. The connector latch is fully seated at both ends.
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4. The Pi 5 uses the **narrower 22-pin** connector — a 15-pin camera cable needs an adapter.
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Power off before reseating. Re-check with:
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```bash
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rpicam-hello --list-cameras # should list a sensor
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dmesg | grep -iE 'imx|ov5647|cfe'
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```
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⚠ **Do not treat `/dev/video*` as evidence the camera works.** Those nodes exist on this Pi already
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and belong to the video codec and ISP blocks — they are present with no camera attached at all.
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`picamera2` is **not** installed yet (`import picamera2` fails); it is the expected capture library
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once a sensor is detected.
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## Planned stages
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1. **Capture** — confirm a sensor, grab a still, establish resolution/format.
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2. **Live feed** — MJPEG stream first (simplest thing that works in a browser); WebRTC later if
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latency demands it.
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3. **Web UI** — single page showing the live feed, plus basic controls.
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4. **Face recognition** — detection first, recognition after; run it on a downscaled frame, not the
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full stream.
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Each stage should be usable on its own before the next begins.
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## Development
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The model endpoint and MCP gateway live on `halogen` and are reachable from this Pi by name.
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Codex is installed and configured here; see [AGENTS.md](AGENTS.md) for how it is expected to work in
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this repo.
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