obd_speed() now counts consecutive null-speed polls. If the ELM327 returns
null for 10 polls (~20s) while still reporting CAR_CONNECTED, it force-closes
the connection so the reconnect loop re-handshakes instead of silently
flatlining until the next ignition cycle.
connect_obd() set _car_ever_connected without a global declaration, so the
module-level flag was never set and was_car_ever_connected() always returned
False — local trip building has been silently blocked since BUG-10 landed.
Also persist the flag to the settings table so a drive followed by a reboot
still builds trips, and clean up dead code in was_car_ever_connected().
BUG-03: DTC/MIL codes were never persisted; lost on OBD disconnect or reboot.
- Add new dtc table schema (code, description, MIL, first/last seen, IS_SET)
and a migration that rebuilds the original unused NAME/STATUS/DTC_ID table.
- Persist MIL + codes to SQLite on each successful OBD poll (_persist_dtc_state).
- /api/dtc falls back to the last-persisted snapshot when OBD is offline/stale.
- Fix get_overview_stats to count the real dtc table (was querying non-existent
dtc_codes table).
- Add cleared/since tracking via IS_SET + FIRST_SEEN_AT/LAST_SEEN_AT.
BUG-05: server trip replay hardcoded speed_source:'gps'; mirror Pi's
'obd if speed>0 else gps' logic in server get_trip_route.
Adds tests/test_dtc_persistence.py (7 tests).
Counterfeit ELM327 chips (common in cheap PL2303 USB adapters) often report
bad/zero voltage even when the OBD connection is working. python-obd's
check_voltage=True default rejects these. Add OBD_SKIP_VOLTAGE_CHECK=1 env
var to pass check_voltage=False to obd.OBD(), documented in yaris-obd.service.
Also document Phase 24.6 Yaris 2013 compatibility analysis in PLAN.md.
Co-authored-by: Copilot <[email protected]>
- _decode_odometer: catch all exceptions and return None instead of raising.
PID 0xA6 (odometer) is not guaranteed on 2013 Toyota Yaris — a garbage
response or unsupported PID previously raised ValueError through python-obd's
decoder, which app_obd._query() caught and treated as a lost connection,
killing the entire OBD session. Now it gracefully returns None.
- connect_obd: reset all sensor globals (rpm, coolant_temp, fuel_level,
throttle_position, mil_on, dtc_codes, odometer, timestamps) on each new
connection so the UI doesn't display stale readings from the previous
ignition cycle while fresh polls are completing.
- yaris-obd.service: add commented OBD_PROTOCOL=6 hint for post-confirmation
pinning (eliminates 3-5s auto-probe delay after first confirmed connection).
Co-authored-by: Copilot <[email protected]>
Squashed rewrite of the project revival work (replaces prior history on this
branch to remove personal data that had been accidentally committed - real
LAN IP, GPS coordinates, home WiFi SSID, and phone model). See PLAN.md for
full phase-by-phase details. Summary:
- Phase 2: adapt app_obd.py for a USB OBD-II adapter (was Bluetooth-only),
auto-detect /dev/ttyUSB*, fix several pre-existing crash bugs.
- Phase 3/4: make the web UI work fully offline (vendored Socket.IO/Leaflet/
Chart.js/FontAwesome, offline map tile downloader script, live GPS marker
tracking fix).
- Phase 5: systemd deployment/autostart on the Pi.
- Phase 6: WiFi hotspot mode via NetworkManager (auto-switch between home
WiFi and a local AP for in-car web UI access), mDNS hostname + port 80
redirect so the UI is reachable at a plain hostname with no port number.
- Phase 7: fix app_db.py/app_sql.py bugs, wire up local SQLite trip logging.
- Phase 8: brand-agnostic USB dashcam file retrieval (lsblk transport-based
detection, works with any dashcam brand/folder layout).
- Rewritten readme.md with a proper project overview.
Co-authored-by: Copilot <[email protected]>
Mathieu Moran