The number is the width/height of the mounting face in inches. So Nena 17 is 1.7inx1.7in on the mounting face, nema 23 is 2.3inx2.3in etc. though looking at datasheet for different nema sized mount that seems like an approximate not dead on number.

Pi 1 was an amazing idea, I ordered one as a sonon as they were available and then never used it for anything. I’ve bought way to many pis since then.

I appreciate the usage of the pi 1 and not one of the newer versions.

I bought a Grandstream GWN7660 last year and it seems pretty good, it replaced a ubiquity WAP that I still have legacy devices connected to.