RFID 125kHz card readers are very cheap (< 5$) and very simple (USB Plug & Play).
Is it possible to chain / multiplex 20 readers to create a very accurate plug-and-play smart shelf?
What are the limitations?
- Tags must be 3cm wide
- Tags must be set at the bottom of item (not on the side of a book)
- Items can't be stacked
- How to multiplex reader to have "reader Id" + "tag Id"?
Is there a simple, plug-and-play, low cost smart shelf alternative? Everything I found (UHF reader + antenna + multiplexer) is for > 5000$