The next step in the process is to collect that information over the airwaves by using radio and something called the “air interface”.
This is the (relatively) easy bit. That isn’t to say that the air interface is simple – like everything else in RFID world there are many standards around. The good news is that for HF systems in libraries (the majority) the industry standard is ISO 18000-3. Among other things the air interface – when libraries choose to use AFI security - ensures that only tags used by libraries are read by scanners.
So having been successfully read by an RFID scanner, over the air interface, our data has now arrived at the read/write unit. What happens next?