I've just released a beta of TeensyDMX v4.0.0 for those of you into Teensys and DMX. All feedback, suggestions, and comments welcome. If you use this or want to play with it and see how it works for you, I'd be most interested in your experiences.
There's lots of new features and improvements, including much more accurate BREAK and MAB timings, a 16-bit API, packet and error stats, Teensy 4 support, and a way to keep short packet data (if they need to be analyzed and diagnosed).
As before, the library can do RDM (by coding an appropriate Responder), and can be used via USB serial for DMX USB Pro and other device emulation.