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What are the steps to reproduce this issue?
- Used the library of pyscan and run nfc.py file.
- Test it with NFC with 7 bytes UID or NTAG 216
What happens?
Authentication problem testing 7 bytes UID NFC.
What were you expecting to happen?
Reads NFC block data.
Any logs, error output, etc?

Any other comments?
What versions of software are you using?
- Pyscan v0.7 and LoPy4
- (sysname='LoPy4', nodename='LoPy4', release='1.20.2.rc10', version='v1.11-a159dee on 2020-06-26', machine='LoPy4 with ESP32', lorawan='1.0.2', sigfox='1.0.1', pybytes='1.5.1')