Student
- Start with CAN concepts
- Run the browser demo
- Complete four labs
UNDERSTAND THE BUS. CONTROL THE SYSTEM.
Embedded32 teaches CAN, SAE J1939, ECU simulation, and diagnostics without requiring hardware first. Run synthetic traces in your browser, complete four classroom labs, and explore ten open-source packages.
ENGINE ECU ─┐
TRANS ECU ──┼── CAN BUS ── DIAGNOSTIC TOOL
DASH ECU ───┘
Public packages10
Classroom labs4
Demo scenarios6
Hardware required0
Learning paths
Instructor
- Review learning outcomes
- Download lab material
- Use grading rubrics
Developer
- Select a package
- Read API documentation
- Contribute code
Live demo preview
Browser CAN/J1939 player
Play synthetic traces, step through frames, inspect PGN decoding, and export results - entirely client-side.
Four labs
LAB 01
CAN BASICS
45–60 MIN · NO HARDWARE
Identify CAN frame fields, interpret hex traces, and explain broadcast vs addressed frames.
Start lab →LAB 02
J1939 MESSAGING
60–75 MIN · NO HARDWARE
Decode PGNs, source addresses, and scaling for common engine messages.
Start lab →LAB 03
MULTI-ECU SIM
60–90 MIN · NO HARDWARE
Run a multi-ECU simulation and correlate bus traffic with vehicle behavior.
Start lab →LAB 04
DIAGNOSTICS
45–60 MIN · NO HARDWARE
Interpret DM1 messages, SPN/FMI pairs, and lamp status bytes.
Start lab →Package map
Ten public @embedded32/* packages are maintained in this monorepo. npm publishing requires maintainer approval - packages are source-available today via GitHub and local install.
- @embedded32/bridge - CAN to Ethernet and MQTT bridging with J1939-aware routing rules
- @embedded32/can - CAN bus abstraction for Embedded32 with mock, virtual, and SocketCAN drivers
- @embedded32/cli - Command-line interface for launching and managing the Embedded32 runtime
- @embedded32/core - Lightweight embedded runtime for Embedded32: scheduler, messaging, and module registry
- @embedded32/ethernet - Ethernet transport layer for Embedded32: UDP, TCP, MQTT, and NanoProto serialization
- @embedded32/j1939 - TypeScript SAE J1939 stack for learning and simulation (PGN, SPN, diagnostics, transport subset)
Architecture overview
Embedded32 layers CAN drivers, J1939 decoding, simulation, bridging, and a supervisor runtime. The browser demo uses a teaching subset of the J1939 decoder - not a certified stack.
Read architecture →For instructors
Course module, student guide, instructor guide, rubrics, and verified solutions ship in the repository.
Instructor resources →Open source
MIT licensed. Contributions welcome via GitHub issues and pull requests.
How to contribute →Honest maturity
Limitations
No SocketCAN in the browser. No WebSockets. No production transport-protocol compliance. J1939 coverage is a teaching subset. npm packages are not automatically published - see the package guide for install options.
Quickstart
shell
git clone https://github.com/Mukesh-SCS/Embedded32.git
cd Embedded32
npm ci
npm run build
npx tsx examples/j1939-basic.ts