he chips, which gives you
   32 ports.  (Pinscape can also use the ports on these chips as
   digital output ports, which might give you a reason to add more
   than two of the chips.)
</p>
<p>
   Wiring a button to a PCA9555 port is basically the same as wiring
   it to a Pico port.  Connect one of the button's switch terminal to
   a PCA9555 I/O port, and connect the other terminal to the Pico GND
   (which is the same as the PC power supply 0V).
</p>
<p>
   Before you can configure the PCA9555 button sou