Good day.
I want to raise this problem. I want to transfer information from the phone (android) to arduino via the nfc interface, namely using the special module rc522. Here is the supporting article http://robocraft.ru/blog/3004.html
If everything is more or less clear with Arduino, then with Android it is not clear exactly how to transfer information (for example, some characters) so that Arduino perceives the phone as a map?

1 answer 1

One of the modes of operation of a mobile device with an antenna for NFC is NFC card emulation (Card emulation mode). Here is a general description. Here is more detailed.