 addition, physical serial ports don't require device drivers on any
   versions of Windows.
</p>
<p>
   To enable the USB COM port, add the <tt><a href="JSONConfigRef.htm#serialPorts.uart">uart</a></tt>
   property to the <tt>serialPorts</tt> section.  You'll need to decide on the
   GPIO ports to use - consult the <a href="PicoPinout.htm">Pico pin-out diagram</a> for that,
   because only certain ports are allowed as UART TX and RX pins.  Note that
   the TX and RX pins must not only be capable of their r