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So this is an alternative to NMEA (which is a variant of CANbus / SAE J1939)? * https://en.wikipedia.org/wiki/National_Marine_Electronics_Association#NMEA_OneN

So this is an alternative to NMEA (which is a variant of CANbus / SAE J1939)? * https://en.wikipedia.org/wiki/National_Marine_Electronics_Association#NMEA_OneNet https://en.wikipedia.org/wiki/National_Marine_Electronics_As... * https://en.wikipedia.org/wiki/NMEA_2000 https://en.wikipedia.org/wiki/NMEA_2000 * https://en.wikipedia.org/wiki/NMEA_0183 https://en.wikipedia.org/wiki/NMEA_0183

Pasorrijer 4y ago
Just an FYI, the first link (NMEA OneNet) sounds great, but isn't actually used by any of the major manufacturers yet sadly. Also, only NMEA2000 is based on CANbus, NMEA0183 is not.
- floathub 4y ago
  Indeed. NMEA2000 is essentially a Marine Electronics version of CANBUS with their own agreed upon PGNs. NMEA0183 is pretty close to RS-232 (and/or RS-422), usually at 4800 baud, but there's a "High Speed" variant at 38,400 baud.
  - emilecantin 4y ago
    Minor nitpick: NMEA0183 is a text format (based on "sentences"), it's at the protocol layer, RS-422 is the most common transport layer but we often carry it over UDP or TCP too. SignalK can convert and output your data in NMEA0183 on TCP port 10110, for instance.
yardie 4y ago
It's not an alternative to NMEA, thought it definitely started as an open source replacement of NMEA. Cooler heads prevailed and the NMEA body opened some of the IP to SignalK developers. So instead of the opensource hardware that used SignalK as originally envisioned we have the same NMEA based proprietary hardware that SignalK ingest and convert to JSON.