I am working on a project where I have 3 boxes and a RFID reader (MFRC522) attached at the bottom of each box. I keep my wallet/keys/etc. in these boxes and an LCD screen displays what is in each box by reading the RFID tag on the wallet/keys/etc.

But sometimes it has trouble detecting my keys which I assume is due to other RFID tags and keys (metal surfaces) and also it simply won't detect my phone or other electronic devices. Hence, I am looking for an alternative to RFID that I can use to monitor the stuff in these boxes. I need the tags to be super thin (for RFID I was using RFID stickers) so that I can attach the tags to anything.

PS. This is just for an educational project. I am relatively new to item tracking systems and thought of making something simple to learn more about it.

  • 1
    \$\begingroup\$ #offtopic - just out of curiosity - what is the purpose of this project? \$\endgroup\$
    – Eugene Sh.
    Sep 13, 2018 at 15:33
  • \$\begingroup\$ It is just a personal project. I generally keep all my daily use things in three boxes and I always struggle to find what is in which box. So I decided to create a small tracking system that displays everything inside a particular box. \$\endgroup\$ Sep 13, 2018 at 15:35
  • \$\begingroup\$ Sounds like you should make a habit to put certain things in a specific box rather than creating some system to track it for you. \$\endgroup\$ Sep 13, 2018 at 15:39
  • \$\begingroup\$ Well, I would put stickers on the boxes :) Or write with marker. Anyway, probably will go as educational project. \$\endgroup\$
    – Eugene Sh.
    Sep 13, 2018 at 15:40
  • 1
    \$\begingroup\$ @Passerby Please don't use all-capitals. This is considered yelling on the web, as you know. Deleting. \$\endgroup\$ Sep 14, 2018 at 6:09

1 Answer 1


There are RFID stickers which are suitable for metallic surfaces. They might require a UHF reader (915MHz in North America) rather than a 13.5MHz reader.

  • \$\begingroup\$ Yeah I searched into that, but I guess that is a bit more expensive for this kind of project. I was think of BLE or something like that, but most of the BLE beacons are not as slim as RFID tags. \$\endgroup\$ Sep 13, 2018 at 17:49
  • \$\begingroup\$ Anti metal rfid tags won't work if you flip them the wrong side up. Very directional. May make things worse. \$\endgroup\$
    – Passerby
    Sep 14, 2018 at 18:19
  • \$\begingroup\$ @Passerby yea I figured that out. That's why I'm planning to shift either to active RFID tags or maybe BLE beacons. But as I stated before I can't find them in thin sticker form. \$\endgroup\$ Sep 17, 2018 at 11:18

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.