What you're looking at is a overcomplicated way of buying coffee a coffee scale that is connected to a coffee shop's (terminal.shop) API. You can order new coffee directly from the scale or even let it do that on its own once your bag starts to run low. It also allows you to weigh out single doses of coffee. Apologies if this sounds a bit too much like an advertisement for them, but that's the reason this is even a thing.

The README contains more information on all the background, how I built the device, and assembly instructions.