How To Make A NFC Tag Read Only?

I have an NTAG213 NFC sticker. I was wondering how I can make this sticker read only. If later I switch to a NTAG215, how could I make that tag read only. What is the process invol

Solution 1:

Looking that the Python library it has a simple method to make readonly using lock bytes or via password.

https://nfcpy.readthedocs.io/en/stable-0.10/modules/tag.html#nfc.tag.tt2_nxp.NTAG21x

Just call the protect method on the tag object with or without password (without password uses the lock bytes and is permanent read-only).

So the library has got programmed in it the right memory addresses and bits to flip for various cards including all the NTAG21x cards.