r the property
   <tt><a href="JSONConfigRef.htm#serialPorts">serialPorts</a></tt>.  This
   property is a sub-object that contains the serial port options.
<p>
   To connect to a serial port (virtual or real), you'll need a terminal emulator
   program.  The one I use is PuTTY, which is an open-source terminal program
   popular with programmers.
</p>

<h4>USB virtual COM port</h4>
<p>
   A virtual USB COM port runs a terminal window session over the Pico's main
   USB cable.  This runs alongside all of th