ACR122 - Card Emulation

Question

How can I get the NFC contactless reader ACR122U to behave as a tag (card emulation mode)? The prospectus claims that the device can do card emulation, but the SDK does not seem

Answer 1

You can use LibNFC. It has example code for this.

I still never got this working properly in Windows unfortunately. You will probably have to compile libnfc for specific drivers.

Also, the ACR122u seems to be pretty poorly supported by many libraries. Apparently it's not really designed for this use. There are particular issues for card emulation too (such as the timeout). We really all need to stop by the ACR122u. I just bought what was popular and easy to get hold of but regret it now.

To future browsers/searchers coming across this: please check the compatibility section on the libnfc site and buy something that they recommend!