Decode NMEA 2000 CAN bus traffic with the canboat toolkit
domain: github.com/canboat/canboat · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Build canboat from source or obtain a release binary; it is a Unix pipeline of small tools rather than a single library
Bridge a physical interface (commonly an Actisense NGT-1) to raw CAN frames on stdout, e.g. actisense-serial -r /dev/ttyUSB0, using the socketcan-serial or ikonvert-serial variants for other adapters
Pipe the raw stream into the analyzer tool, which decodes PGNs using canboat's built-in PGN definitions
Select analyzer output as JSON (using the canboat.json/canboat.xml definitions) rather than plain text for programmatic downstream consumption
Optionally pipe decoded output into n2kd to fan the stream out to multiple TCP/IP clients
To transmit PGNs back onto the bus, send them in the documented CSV-style format to the interface program's stdin, after first whitelisting transmittable PGNs on the gateway hardware itself
Known gotchas
NGT-1 baud rate mismatches (115200 vs 230400 on newer firmware) produce garbled decode errors rather than a clean failure; set it explicitly with the -s flag
Writing to the bus requires out-of-band PGN whitelisting on the Actisense hardware via its own configuration software; canboat cannot force an untransmittable PGN out
canboat's PGN set is community-maintained and not exhaustive; many manufacturer-proprietary PGNs are undocumented since the full NMEA 2000 standard itself is a paid, licensed document
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