J1939

J1939 and NMEA 2000 are both communication protocols built upon the same Controller Area Network (CAN) bus technology, using the same 29-bit message identifier and 250 kbps baud rate. The main differences lie in their application, device addressing, data message definitions (PGNs), physical layer specifications, and overall design philosophy.

The J1939 protocol is increasingly being adopted in marine applications, providing monitoring and control for engines, propulsion systems, generators, and electrical networks.

To support this trend, a self-contained J1939 diagnostics tool has been developed, featuring a built-in web interface that allows any device with a browser to connect and analyze data seamlessly.