Rfid

ideally we'd like to have passive tags on all important eqpt and be able to read it from far away e.g. 5-10m.

It looks like UHF passive tags / gen2 can approach this performance

http://skyrfid.com/RFID_Tag_Read_Ranges.php

Research

• Active tag, 25 dollars, open design: https://www.openbeacon.org/device.html