RFID tracking would be my first guess. If you want to know where a tag is, you need multiple readers. Are they roughly in a grid pattern?
A second guess, are there e-ink tags in this store? These might be repeaters for programming those.
RFID tracking would be my first guess. If you want to know where a tag is, you need multiple readers. Are they roughly in a grid pattern?
A second guess, are there e-ink tags in this store? These might be repeaters for programming those.