With these examples you can turn your reader into a NFC target.
Emulates partially a MIFARE Mini
For testing purposes it simulates a ISO14443A tag with a UID that consists of 0xDEADBEAF.
The frames are delayed because of the USB communication, so not all readers will recognize the tag. The “Omnikey 5121” though has no problems with this small delay.
Emulates a MIFARE Ultralight
Emulates a MIFARE DESFire
Requires a PN532