Making a UART - USB pass through ================================ It's as simple as:: import pyb import select def pass_through(usb, uart): usb.setinterrupt(-1) while True: select.select([usb, uart], [], []) if usb.any(): uart.write(usb.read(256)) if uart.any(): usb.write(uart.read(256)) pass_through(pyb.USB_VCP(), pyb.UART(1, 9600, timeout=0))