I've updated the sming project again. It's now accepting udp dataframes for tpm2.net and art-net as well as exposing the brightness var in an html page. It seems like it's capable of pushing 100+fps without issues with frames bunching up - that's up from 24fps with the half lua/half C++ solution that I used last time around. To build this, make sure the spi speed is no higher than 500kps. I got more length controllable with that speed than at 1mbps.