Review on 🔮 PN532 NFC NXP RFID Module V3 Kit - Near Field Communication Reader Module Kit - I2C SPI HSU with S50 and CUID White Card Key Card - Compatible with Arduino, Raspberry Pi, DIY Smart Phone, Android Phone - Black with Pin Header by Paarvin Freedman

Name: 🔮 PN532 NFC NXP RFID Module V3 Kit - Near Field Communication Reader Module Kit - I2C SPI HSU with S50 and CUID White Card Key Card - Compatible with Arduino, Raspberry Pi, DIY Smart Phone, Android Phone - Black with Pin Header
Item: 🔮 PN532 NFC NXP RFID Module V3 Kit - Near Field Communication Reader Module Kit - I2C SPI HSU with S50 and CUID White Card Key Card - Compatible with Arduino, Raspberry Pi, DIY Smart Phone, Android Phone - Black with Pin Header
Rating: 3

October 07, 2022

Works well but frequency varies between modules and read range is only 3-4 cm

I have used PN532 from this and other manufacturers in several projects in the past. I've been having trouble reading some custom tags recently, so I bought a NanoVNA to measure the resonant frequency of those modules and tags. We tested 5 PN532 modules and found that each of them has a different resonant frequency in the 12.6-15MHz range. None of them were tuned to 13.56MHz. The read range of enabled tags and a custom tag set to 13.6MHz is 3-4 cm.

Pros