@whitequark In former role before IOT radios, I wrote the firmware for the CP2102N USB to UART. Fun project, managed to squeeze 3 mbps out of an 8051 core at 48 MHz. I still have nightmares over the things I had to do to get software flow control working. 😨 But by god, it worked, and we found 4 bugs in our FTDI chip we used for testing.