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PN532 Card Emulation Memory
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PN532 Card Emulation Memory

by diegomarvid on Wed Dec 16, 2020 2:51 pm

I want to send information from an Arduino to a phone via NFC.
To do this I have an Adafruit PN532 module. The way I want to send information is to use the module to emulate an NFC tag and read the message from the phone. The reason I don’t want to use a real NFC card is due to the memory limitations. Most of them have near 800 bytes of memory and the ones with more memory are expensive. In case I emulate a card with adafruit PN532 module, will I still have some memory limitation?

I founded this in the documentation:

documentacionpn532.PNG
PN532 documentation
documentacionpn532.PNG (133.67 KiB) Viewed 95 times


What I saw that was important was APDU bytes limitations. I’m not really an expert in NFC and I don’t know if this would affect me in the emulated card memory.
My intention is for example emulate an NTAG with 4KB of data. I know there is no specific function to emulate tags but there are several functions that may help to do
a small library for the project. Can the Adafruit module with the library emulate for example a 4KB NTag?

diegomarvid
 
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Joined: Wed Dec 16, 2020 12:35 pm

Please be positive and constructive with your questions and comments.