This may be the completely wrong place to be asking. But, has anyone ever seen any sort of DIY LED sign, remotely configurable sort of project? I’m thinking a sign that can sit on my desk at the office that if I end up working remotely that day I can update it to reflect that to my coworkers (I get a lot of visitors per day from different departments asking questions) so they know they can still contact me via Teams? Apologies if this isn’t the right place for this.
I’d go for an ESP8266/ESP32 with a telegram bot and LED (based sign) hanging off it. Just send a msg on telegram to turn it on/off.
That having been said loads of ways to trigger the sign status - it could poll a website to see what status it should display and you have a mechanism of updating that status yadda yadda yadda.
Note that those little chips needs wifi so you’d need to be able to connect it to wifi and have it get public internet access (or whatever you decide to control it). Loads of posts/youtube exist about driving WS2812 LEDs, or making your own DIY LED ‘neon’ signs. Cool little projects.