Hello,
We used the NDEF standard, with langage code "en" and text contents "1" or "2".
For example, a white plant ("1") could be:
# Memory Content:
[00] * xx:xx:xx xx
[01] * xx:xx:xx:xx
[02] + 90 C0 F8 FF
[03] x E1:10:12:00
[04] x 01 03 A0 0C |....|
[05] x 34 03 08 D1 |4...|
[06] x 01 04 54 02 |..T.|
[07] x 65 6E 31 FE |en1.|
[08] x 00 00 00 00 |....|
[09] x 00 00 00 00 |....|
[0A] x 00 00 00 00 |....|
[0B] x 00 00 00 00 |....|
[0C] x 00 00 00 00 |....|
[0D] x 00 00 00 00 |....|
[0E] x 00 00 00 00 |....|
[0F] x 00 00 00 00 |....|
And for a violet plant ("2"):
# Memory Content:
[00] * xx:xx:xx xx
[01] * xx:xx:xx:xx
[02] + 90 C0 F8 FF
[03] x E1:10:12:00
[04] x 01 03 A0 0C |....|
[05] x 34 03 08 D1 |4...|
[06] x 01 04 54 02 |..T.|
[07] x 65 6E 32 FE |en2.|
[08] x 00 00 00 00 |....|
[09] x 00 00 00 00 |....|
[0A] x 00 00 00 00 |....|
[0B] x 00 00 00 00 |....|
[0C] x 00 00 00 00 |....|
[0D] x 00 00 00 00 |....|
[0E] x 00 00 00 00 |....|
[0F] x 00 00 00 00 |....|
Data marked as "xx" is the serial number of the tag, and different for each one.
We used official NXP applications as a reference.
For writing:
https://play.google.com/store/apps/details?id=com.nxp.nfc.tagwriter
https://apps.apple.com/fr/app/nfc-tagwriter-by-nxp/id1246143221
For reading:
https://play.google.com/store/apps/details?id=com.nxp.taginfolite
https://apps.apple.com/fr/app/nfc-taginfo-by-nxp/id1246143596
(Dumps above were made with this app, on android.)
Regards,