There was a brief time in the early 2000s when we carried cellphones, wallets, keys, and a bespoke digital media player loaded with a small selection of our music libraries. Devices like iPods, Zunes, ...

This can be handled by a Python script, or more intuitively via a browser-based front-end. This uses WebUSB in order to take input from the browser and then send data out over the USB-serial ...