64 LEDs is not enough. In most environments outside of home I am finding 64 Bluetooth devices is quickly exceeded and the 8x8 matrix only showing the last 64 devices seen is not as cool. At Hackaday Supercon 2023, I saw over 300 devices at one point and then it averaged in the 200s.

I found a 16x16 addressable flexible LED matrix on Amazon for $18. Then I designed and 3D printed and tight fighting case to house the matrix and controller. I printed the first few layers with white PLA to act as a light diffuser to soften the LEDs. The rest of the case is printed from a wood fiber/PLA filament. I wanted this version to be something that you can sit on a desk or table top and not look like bomb or a low budget sci-fi movie prop. Something that would blend in with modern furniture. 

I tested it at the office today and it worked great. I need to print the back cover for it yet and then I think this will live at the office. The office didn't have as many people as a usual week day but it was enough to test it. By the end of the day it trickled down to the low teens for devices seen.