Earlier quoted context omitted.
Feels like a problem in search for a solution to me. Although I haven’t worked in an office for a while now, so it could be that I’m not understanding the importance in such setting (or whatever is this device’s target use environment) that can’t be replaced with a sticky note.
I don't work in an office anymore either, but when I did (years ago), I would get constantly interrupted by people walking up to my desk and talking to me. I like talking to people but I also need uninterrupted focus time. I made something similar with a blink USB light: https://blink1.thingm.com/ . I had a little sign that said "when it's red, I'm busy". And a keyboard shortcut to toggle it from red to green (it jus…
I never got to the point of having a USB light as a semaphore or anything like that, but I really wanted to find and hack a toy traffic light that would indicate if it was a good time to interrupt me or not. So yeah, it was a very real problem.