nmea2000 on toorun.devhttps://toorun.dev/tags/nmea2000/Recent content in nmea2000 on toorun.devHugo -- gohugo.ioen-usThu, 29 May 2025 12:30:00 +0000NMEA 2000 Implementation: Address Claim, Heartbeat, and Alarm Messageshttps://toorun.dev/posts/nmea-2000-implementation-address-heartbeat-alarm/Thu, 29 May 2025 12:30:00 +0000https://toorun.dev/posts/nmea-2000-implementation-address-heartbeat-alarm/This is not a full specification reference. It is a practical note to remember how NMEA 2000 works in real systems, what matters during implementation, and what I learned while working with it. What NMEA 2000 is NMEA 2000 is a communication protocol used in distributed systems over CAN bus. At the lowest level, it is standard CAN: 250 kbps bus multi-node shared network On top of that, it defines: