Mathieu Moran
0d67a21ae1
Root-caused the slow-upload complaint to the Pi's own congested 2.4GHz WiFi radio (confirmed via iperf3 - same degraded throughput even on pure local LAN traffic, ruling out Cloudflare/ISP). Since the Pi 3 B has no 5GHz radio, add a way to bypass it for the internet-bound leg: a phone opens /dash and manually relays pending dashcam files straight to the remote server over its own network, reusing the exact same chunked upload protocol the Pi's client already uses. - server/app.py: add CORS headers (after_request) so the phone's browser can call the remote server cross-origin from a page served by the Pi. - app.py: new endpoints - GET /api/dash/pending (list not-yet-uploaded files), GET /api/dash/file/<path> (Range-request-capable download, path-traversal safe), GET /api/dash/relay/config (hands the phone the device credentials), POST /api/dash/relay/heartbeat|stop (lease- based pause of the Pi's own background uploader, self-heals if the phone's tab closes uncleanly), POST /api/dash/relay/mark_uploaded. - modules/app_upload.py: list_pending_dashcam_files(), relay lease helpers, _upload_dashcam_files() now pauses while a relay lease is active. - modules/app_sql.py: new dashcam_hash_cache table so a file's sha256 is only computed once (keyed by path+size+mtime) instead of being recomputed on every loop iteration/pending-list call - benefits the existing background uploader too. - templates/dash.html / static/js/dash.js: new "Relay via phone" card - per-file and "relay all" buttons (manual trigger only, per user preference), downloads+uploads one 40MB slice at a time so the phone never holds a whole file in memory, retries chunks up to 3x. - PLAN.md/readme.md/server/README.md updated (Phase 11). Tested via a full local end-to-end simulation driving the real Pi and server Flask apps side by side (Postgres mocked only at the db module boundary - all HTTP/chunking/auth/CORS logic is real): verified Range downloads (206), byte-for-byte reassembly via SHA256, path-traversal rejection, and the relay lease correctly pausing/resuming the background uploader. Not yet tested against a real phone/live network.
87 lines
4.1 KiB
Markdown
87 lines
4.1 KiB
Markdown
# yaris-obd 🚗📡
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A Raspberry Pi 3-based OBD-II + GPS tracker for my 2013 Toyota Yaris — reads live vehicle data
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over USB, tracks position with a SIM868 GNSS/GSM HAT, and serves it all from a local web UI you
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can pull up on your phone by connecting to the car's own WiFi hotspot. Fully usable offline: no
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internet needed in the car, offline map tiles included. Also handles pulling dashcam footage off
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a USB dashcam for local/remote backup.
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<table>
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<tr>
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<td width="120">
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<a href="https://open.spotify.com/playlist/5u9vSw39FrIz7KghBkmgH4">
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<img src="https://image-cdn-fa.spotifycdn.com/image/ab67706c0000d72c979ac180a23a70139d1ebd81" width="100" />
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</a>
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</td>
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<td>
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**rené lévesque bangers**
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i have a dream
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[](https://open.spotify.com/playlist/5u9vSw39FrIz7KghBkmgH4)
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</td>
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</tr>
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</table>
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## Screenshot
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## Features
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- 📊 **Live OBD-II data** (speed, RPM, DTC codes) over a cheap USB ELM327-compatible adapter
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- 🛰️ **Real GPS tracking** via a Waveshare SIM868 GNSS/GSM/Bluetooth HAT, plotted live on an
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offline Leaflet map (pre-cached map tiles — no internet needed in the car)
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- 📶 **Self-hosted WiFi hotspot** so you can load the web UI on your phone from inside the car,
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with automatic fallback to your home WiFi when in range (`http://yaris.local` — no port number)
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- 🎥 **Dashcam file retrieval** — detects a USB dashcam automatically (any brand/folder layout,
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no hardcoded device path), copies its footage locally, verified against real hardware
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- ☁️ **Remote upload** — a self-hosted server (Flask + Postgres, `server/`) receives trip/GPS
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logs and dashcam footage over the internet (via Cloudflare Tunnel or a plain port-forward).
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Dashcam videos upload in resumable 40MB chunks (works around tunnel body-size limits and keeps
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the Pi's memory footprint flat regardless of file size); a UI toggle can pause dashcam uploads
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independently while trip logs keep syncing
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- 📱 **Phone-relay upload** — if the Pi's own WiFi is slow/congested, open `/dash` on your phone
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to download pending dashcam files locally and re-upload them straight to the remote server
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using the phone's own network instead, automatically pausing the Pi's own upload meanwhile
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- 🗄️ Local SQLite trip logging, retried/synced to the remote server with automatic backoff
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- 🔌 Runs fully headless as a `systemd` service, autostarting on boot
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## Hardware
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| Part | Notes |
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| --- | --- |
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| Raspberry Pi 3 Model B | Web UI host + hotspot |
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| Waveshare SIM868 HAT | GNSS (GPS) + GSM/GPRS, unused Bluetooth |
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| USB OBD-II adapter | PL2303-based, ELM327-compatible (originally Bluetooth, switched to USB) |
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| USB dashcam | Any brand — detected as generic USB mass storage |
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| 2013 Toyota Yaris | The patient |
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See [PLAN.md](./PLAN.md) for full hardware bring-up notes (SIM868 jumper/UART setup, antenna
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gotchas, etc.) and the detailed project history.
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## Getting started
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```bash
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python3 -m venv venv
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source venv/bin/activate
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pip install -r requirements.txt
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python3 app.py
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```
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The app serves on `http://<host>:5000`. On the Pi it also runs as a `systemd` service
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(see [deploy/](./deploy)) and is reachable with no port number at `http://yaris.local` once the
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mDNS + port-redirect setup described in [PLAN.md](./PLAN.md) is installed.
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For the remote server (receives trip logs + dashcam uploads), see [server/README.md](./server/README.md).
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## Project status
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This project was revived after a couple of years on the shelf. All 11 planned phases are done and
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the full pipeline — OBD/GPS logging, offline web UI, WiFi hotspot, dashcam retrieval, remote
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upload, and phone-relay upload — has been verified against real hardware end-to-end, including a
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full real dashcam import and upload run. Only the SIM868 cellular fallback (for uploading while
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out of WiFi range) and the phone-relay feature's real-phone/live-network test remain untested.
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Full phase-by-phase history in [PLAN.md](./PLAN.md).
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