Ryan Malloy 8ba53630c0 Add OBD-II K-line support (ISO 9141/14230) with scanner example ...

New protocol handler alongside BMW I/K-Bus:
- KLineObd2: 5-baud slow init, fast init (TiniPulse), request/response
  with half-duplex echo clearing, PID convenience wrapper
- Obd2Pids.h: ~20 common PIDs with SAE J1979 decode helpers
- obd2_scanner.cpp: polls RPM, speed, coolant, throttle, voltage

Build config changes:
- config.h: KLINE_* defaults (10400/8N1/MOD256/no idle detect)
- platformio.ini: build_src_filter separates sketches, new
  [env:obd2-scanner] environment with KLINE_TX_INVERT=0

2026-02-13 05:46:07 -07:00

firmware

Add OBD-II K-line support (ISO 9141/14230) with scanner example

2026-02-13 05:46:07 -07:00

reference

K-line compatibility analysis: optocoupler vs 510 ohm pull-up

2026-02-13 02:18:20 -07:00

CLAUDE.md

Update docs: R2=220 fix, sweep netlists, corrected BOM and drain figures

2026-02-13 01:02:06 -07:00

Description

BMW I/K-Bus + OBD-II K-line interface board (ESP32, optocoupler isolated)

687 KiB

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