The code is very simple, and even if you never find yourself needing to fire up an impromptu terminal, it offers an interesting example of how straightforward serial communications really are.

PyXL is a custom-built computer chip (a hardware processor) specifically designed to understand and execute Python code ...

If that doesn’t interest you, think of it this way: it’s a (relatively) VT100 compatible serial terminal with a physical keyboard that can fit in your pocket. Being essentially just a dumb ...