USB! I’ve tried and failed couple times in understanding how USB works under the hood, from electrical, to protocol, then classes, and also Power Delivery. This time around things seem to make more sense now. It started out as an ambitious goal to emulate an FTDI USB DMX converter with the ESP32-S2/S3, but realizing that might be too big a goal, so I’m starting small. I want to be able to make a custom device class on the ESP32, and write a driver with libusb.