Stand alone high speed K-Line logging to an sdcard using an arduino. Canbus support is a work in progress. Although no Romraider Logger code was used directly it was an essential guide to get "fast polling" of ecu data. That project can be found at https://github.com/RomRaider/RomRaider

Standalone SSM (K-Line) data logger for the Arduino Uno R4 Minima. Reads RomRaider logger.xml profiles + logger_*.xml definitions from the SD card, builds a complete per-ECU parameter dictionary, and logs to CSV via SSM fast-poll (continuous) batch reads. Auto-generates a profile when the ECU is unknown or no logger.xml is present.

• Source: firmware/sssal/sssal.ino
• Compiled binaries: firmware/binaries/sssal_alpha3.bin and sssal_alpha3.hex
• Build: arduino-cli compile --fqbn arduino:renesas_uno:minima (libs: SdFat, RTClib)
• Flash: arduino-cli upload or bossac (Renesas RA4M1)

• Per-ECU batch-read limit: the firmware now probes each ECU's max SSM batch size on first detection, caches it in the address_map.csv header (BATCHMAX=), and reuses it on later boots (no re-probe). If a selection exceeds the limit, the highest-numbered params are dropped and logged to status.log (BATCH_LIMIT ...), instead of silently failing. (On the test ECU the real ceiling was ~40 addresses, vs the old assumed 84.)
• Timing constants updated from on-car J2534 measurement (init ~148 ms round-trip).

A PC-side J2534 validator (Tactrix OpenPort 2.0) that checks everything the firmware relies on before flashing: ROM-ID + capability decode, capability→param-name mapping, live param/switch/E-param (extended-address) reads, max-batch probe, single vs continuous (fast-poll) timing. Run SsmInitTiming.exe; SsmInitTiming.exe brake watches a switch toggle live. Validated on-car against an EJ ECU (ROM 2F12515506).

Alpha — firmware not yet hardware-tested (compiles clean: Flash 39%, RAM 50%). The SSM protocol paths are bench-validated via the pre-flight tool.