Robot Navigation using RFID/NFC

My Instructables on my build:

https://www.instructables.com/id/Robotic-Indoor-Navigation-With-RFIDNFC-Tags

Parts:

IC Card RC522 RFID MFRC-522 Reader Sensor \$2.00

http://www.ebay.com/itm/311745603238?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Cards:

10 PCS NFC smart card tag 1k S50 IC 13.56Mhz Read/Write RFID \$2.52

http://www.ebay.com/itm/262611831216?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

25mm NFC Tags Stickers NTAG213 Stickers 50pcs 9.99

http://www.ebay.com/itm/322083313127?_trksid=p2060353.m1438.l2649&var=511012085777&ssPageName=STRK%3AMEBIDX%3AIT

The Idea:

https://www.intorobotics.com/5-cheap-methods-for-indoor-robot-localization-ble-beacon-apriltags-wifi-subpos-nfc-and-rfid/

Youtube Video:

https://www.youtube.com/watch?v=iHCBRCjRnm8

Other Location based ideas:

http://www.localino.net/