A tour of automotive protocols — LIN, CAN, FlexRay, automotive Ethernet — and the engineering reasons CAN bus became the backbone of every vehicle: lossless bitwise arbitration, built-in priority, and brutal error handling.
Pre-compliance checks you can run on your own bench before taking an industrial device to an accredited EMC lab — and the three failures that catch most designs.
What actually differs between RS-232 and RS-485 at the electrical level — voltage levels, differential signaling, common-mode range, termination and biasing — and which one wins for which job.
How J1939 turns raw CAN into a plug-and-play network for trucks and heavy machinery — the 29-bit ID anatomy, PGN/SPN signal dictionary, transport protocol for big payloads, address claiming and DM1 diagnostics.
How Modbus actually works on the wire — ASCII, RTU and TCP framing compared byte by byte, RTU silence timing explained, and which physical layers (UART, RS-232, RS-485, Ethernet) can carry it.