Mathieu MoranandCopilot
45773f7459
Live-tested the away-from-home hotspot+cellular relay scenario. Found the netwatch reconnect bug (documented in Phase 6 update) during this test. Confirmed the relay architecture itself needs no code changes - the TypeError: Failed to fetch was a phone-OS network-switching behavior (won't route internet traffic over cellular while connected to a no-internet WiFi), not a CORS/code issue - ruled out via a plain page navigation test. Testing this fully requires being genuinely away from home or manually forcing cellular use on the phone. Co-authored-by: Copilot <[email protected]>
yaris-obd 🚗📡
A Raspberry Pi 3-based OBD-II + GPS tracker for my 2013 Toyota Yaris — reads live vehicle data over USB, tracks position with a SIM868 GNSS/GSM HAT, and serves it all from a local web UI you can pull up on your phone by connecting to the car's own WiFi hotspot. Fully usable offline: no internet needed in the car, offline map tiles included. Also handles pulling dashcam footage off a USB dashcam for local/remote backup.
|
rené lévesque bangers i have a dream |
Screenshot
Features
- 📊 Live OBD-II data (speed, RPM, DTC codes) over a cheap USB ELM327-compatible adapter
- 🛰️ Real GPS tracking via a Waveshare SIM868 GNSS/GSM/Bluetooth HAT, plotted live on an offline Leaflet map (pre-cached map tiles — no internet needed in the car)
- 📶 Self-hosted WiFi hotspot so you can load the web UI on your phone from inside the car,
with automatic fallback to your home WiFi when in range (
http://yaris.local— no port number) - 🎥 Dashcam file retrieval — detects a USB dashcam automatically (any brand/folder layout, no hardcoded device path), copies its footage locally, verified against real hardware
- ☁️ Remote upload — a self-hosted server (Flask + Postgres,
server/) receives trip/GPS logs and dashcam footage over the internet (via Cloudflare Tunnel or a plain port-forward). Dashcam videos upload in resumable 40MB chunks (works around tunnel body-size limits and keeps the Pi's memory footprint flat regardless of file size); a UI toggle can pause dashcam uploads independently while trip logs keep syncing - 📱 Phone-relay upload — if the Pi's own WiFi is slow/congested, open
/dashon your phone to download pending dashcam files locally and re-upload them straight to the remote server using the phone's own network instead, automatically pausing the Pi's own upload meanwhile - 🗄️ Local SQLite trip logging, retried/synced to the remote server with automatic backoff
- 🔌 Runs fully headless as a
systemdservice, autostarting on boot
Hardware
| Part | Notes |
|---|---|
| Raspberry Pi 3 Model B | Web UI host + hotspot |
| Waveshare SIM868 HAT | GNSS (GPS) + GSM/GPRS, unused Bluetooth |
| USB OBD-II adapter | PL2303-based, ELM327-compatible (originally Bluetooth, switched to USB) |
| USB dashcam | Any brand — detected as generic USB mass storage |
| 2013 Toyota Yaris | The patient |
See PLAN.md for full hardware bring-up notes (SIM868 jumper/UART setup, antenna gotchas, etc.) and the detailed project history.
Getting started
python3 -m venv venv
source venv/bin/activate
pip install -r requirements.txt
python3 app.py
The app serves on http://<host>:5000. On the Pi it also runs as a systemd service
(see deploy/) and is reachable with no port number at http://yaris.local once the
mDNS + port-redirect setup described in PLAN.md is installed.
For the remote server (receives trip logs + dashcam uploads), see server/README.md.
Project status
This project was revived after a couple of years on the shelf. All 11 planned phases are done and the full pipeline — OBD/GPS logging, offline web UI, WiFi hotspot, dashcam retrieval, remote upload, and phone-relay upload — has been verified against real hardware end-to-end, including a full real dashcam import and upload run. Only the SIM868 cellular fallback (for uploading while out of WiFi range) and the phone-relay feature's real-phone/live-network test remain untested. Full phase-by-phase history in PLAN.md.