Looking for Arduino + Adafruit examples


I implanted an xNT NFC Tag , NTAG216. I want to write data to it.
I can read my tag with Arduino + Adafruit, but the code fails to write to the tag.
I get an “Unsupported tag” respond from the program ( WriteTag.ino ) available at
in Arduino/Adafruit examples.

Anyone has this configuration with a demo program ?