We got some samples of Nanjing Qinheng Microelectronics http://www.wch-ic.com/ CH9102F and it's pretty much a drop in replacement for Silicon Labs https://www.silabs.com/ CP201x USB to serial chips. A new driver install is needed but its the same pinout and package - great for us because we're having difficulty getting CP210x chips in enough quantity to keep our stock of ESP32 Feathers available for sale! We tested it on Windows and a Mac M1 to make sure uploads at 921kbps still work - next up we'll see if it works on Linux. If so, you may see some of our boards come with this chip in the adafruit shop soon.Visit the Adafruit shop online - http://www.adafruit.com-----------------------------------------LIVE CHAT IS HERE! http://adafru.it/discordAdafruit on Instagram: https://www.instagram.com/adafruitSubscribe to Adafruit on YouTube: http://adafru.it/subscribeNew tutorials on the Adafruit Learning System: http://learn.adafruit.com/-----------------------------------------@Silicon Labs #adafruit #WCHCH9102F #silabs