Send real frames to each other
CAN bus playground
Every phone and laptop in the room becomes a node on a simulated CAN network. Frames use a real CRC-15 and real bit stuffing, so the bits on screen are the bits a transceiver would put on the wire.
Identifier 331 · 0x14B. 11 bits. Here it's the target node; in real CAN it names the message and sets its priority (lower wins).
How it works
- 01
Join
Scan the QR code on the projector. You get a node ID from 1 to 2047, the range of an 11-bit CAN identifier.
- 02
Tune
Pick a bitrate to transmit on and one to listen on. Each bitrate is its own bus: you only hear nodes on yours.
- 03
Send
Type 331+hello to send hello to node 331. Open any frame to see its fields, its bits and how long it takes on the wire.
For the presenter
Host a meeting
You get a meeting code and a presenter view for the projector: a QR code to join, a map of every bus, a live frame log and a large inspector to talk over. From there you can limit bitrates, pause sending, clear the log and put prompts on everyone's screen.