Nice. Looking forward to seeing how this comes together when you get the Sys11 board, the P-ROC and really start tinkering.

Do you post your sketch code anywhere? I have an Arduino (Nano in my case) running in my machine controlling the dozen or so RGB inserts, and that talks to the controller PC via USB. Would like to compare notes sometime

I push serial data from a PC out to an Arduino to control the RGB LED inserts in my F14 project. The commands coming in are always 6 bytes long. I use the same technique, my main loop in the Arduino code has

if (Serial.available() >= 6) {
// Grab the first 6 bytes and do something.
}