https://embeddedcoffe.my.id/tags/nmea2000/Recent content in Nmea2000 on Embedded CoffeHugoen-USThu, 20 Aug 2026 08:15:00 +0000https://embeddedcoffe.my.id/posts/marine-nmea-2000-esp32-gateway/Thu, 20 Aug 2026 08:15:00 +0000https://embeddedcoffe.my.id/posts/marine-nmea-2000-esp32-gateway/<p>Marine electronics rely on <strong>NMEA 2000</strong> (N2K), a standardized protocol built on top of Bosch CAN 2.0B (Controller Area Network) operating at 250 kbps with J1939-based 29-bit identifiers.</p> <p>In this project, we design an isolated hardware gateway that bridges N2K PGN messages directly into an MQTT stream for vessel dashboards.</p> <h2 id="hardware-architecture--galvanic-isolation">Hardware Architecture &amp; Galvanic Isolation</h2> <p>Boats often have multiple battery banks with distinct ground references. Directly connecting an ESP32 to the CAN bus without isolation risks ground loops, alternator noise, and damaged silicon.</p>