i-k-bus-board

warehack.ing/i-k-bus-board

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Author	SHA1	Message	Date
Ryan Malloy	a2dcd6d58d	Harden OBD-II K-line handler (code review findings) Fix UART pin detach: pinMatrixOutDetach() instead of no-op uart_set_pin(ALL_NO_CHANGE). Fix timeout underflow in readResponse() with remainingMs() helper. Add checksum validation on received frames. Echo verification in clearEcho() detects bus contention. Flush RX buffers after init sequences. Structural ISO 14230 frame parsing replaces byte-scanning. TesterPresent keepalive prevents P3 session timeout. Scanner re-initializes after consecutive failures.	2026-02-13 06:02:25 -07:00
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

Author

SHA1

Message

Date

Ryan Malloy

a2dcd6d58d

Harden OBD-II K-line handler (code review findings)

Fix UART pin detach: pinMatrixOutDetach() instead of no-op
uart_set_pin(ALL_NO_CHANGE). Fix timeout underflow in
readResponse() with remainingMs() helper. Add checksum
validation on received frames. Echo verification in clearEcho()
detects bus contention. Flush RX buffers after init sequences.
Structural ISO 14230 frame parsing replaces byte-scanning.
TesterPresent keepalive prevents P3 session timeout. Scanner
re-initializes after consecutive failures.

2026-02-13 06:02:25 -07:00

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

2 Commits