Rfid conection to arduino nano


Does anyone have the conection for an RFID RC522 to Arduino Nano V3?


I’ll put together a drawing at some point soon for the Uno, Nano v3, and Mega, but the v3 should be the same as the Uno assuming you’ve flashed my firmware from Github.


3.3V <–> 3.3V
RST <–> D10
IRQ <–> D6
MISO <–> D12
MOSI <–> D11
SCK <–> D13
SDA <–> D9


Pin out worked great thank you

when I scan an RFID tag for the first time it says access denied assign to user or cancel. I go to the server and put in user name and nice name when I hit save , username clears and only nice name is left save does nothing at that point. Am I inputting in the wrong order?


No you’re good, it seems like a bug on the initial save. If you leave that screen and come back you should see both fields successfully populated.


Thank you
Yes it does work 2nd time around
Thanks again for the info


Do you, by chance, have a picture of the connections for the mega, or a pinout. I have been trying to get it to work for a couple days now. Obviously I’m missing something. Thanks!!!



3.3V <–> 3.3V
RST <–> D10
IRQ <–> D6
MISO <–> D50
MOSI <–> D51
SCK <–> D52
SDA <–> D9

I have some of the cheap Amazon RC522 readers, but I also have a Velleman VMA405 reader as well. The VMA405 does not use the IRQ Pin so it’s not connected to anything. I’ll have to test the RC522 without IRQ connected to see if it still works, but this pinout should work for any similar RFID readers connected to an Arduino Mega.