RC522 RFID and NFC Tag Range

Projects General Guidance
1

Hi
I am currently making a project to track the devices at work. I want to add an NFC tag to all the devices and record them by scaning the tag to the RC522.

Using the system and code below:

The problem is that I have 3 tags: NFC Tag, key tag (blue ones) and ID card tags for the tests. The system reads the key tag with no problem but for the other 2 it sometimes reads and must touch to the RC522 in order to read.

Why am i having this problem with the key tag and NFC tag? How can I make the NFC tag to be read from 2-3 cm length? Looking forward to your solutions....

Best regards,

2

If there is no way to increase the power or sensitivity of the reader, try cards from other manufacturers.

lg, couka

3

Thanks for the reply. The rx gain value is in the maximum (48 db). Which manufacturers would you recommend for the nfc tags?