I've used beacons a lot in installations. I found their reliability was a bit over-promised [1]. If you want to know whether a user is within a 4 metre sphere,

I've used beacons a lot in installations. I found their reliability was a bit over-promised [1]. If you want to know whether a user is within a 4 metre sphere, in a time window of about 5 seconds, then it's fine. But don't hope for anything more precise than that; the false positives/negatives aren't great. A large part of the variation I found was due to how individual users held their phones, and the resulting signal attenuation. [1] https://hackaday.com/2015/12/18/immersive-theatre-via-ibeacons-with-dustin-freeman/ https://hackaday.com/2015/12/18/immersive-theatre-via-ibeaco...