Hey mate, long time no see.
How is your Ubiquiti system going?
To answer your questions
Unlikely, but Good luck.
You would have seen that the FlexNT has been discontinued.
This was for 2 reasons, which was really one all encompassing issue; the fragility of the chips. One on the NTAG216 sticker the other the LEDs.
Neither were robust enough to survive everyday invivo life.
I dont think there are any out there and implanted where the LEDs have survived although, this could be survivorship bias by me.
The NTAG216 stickers have had fewer failures and I belive there are still a few out in the wild.
I havent heard of any of the T5577 chip and antennas (FlexEMs) failing.
If you’re happy to take a suggestion from an internet rando, could I suggest you consider a FlexNT and a FlexEM (If you need the functionality of both)
I have a FlexNT and I have had it for years. It is a great wee performer.
I did a write up on it
I will be back home later today where I have some Bullseye stickers (what was used in the FlexNExT) and I can do a read range comparison for you; I expect the Sticker to out perform the FlexNT purely because of the massive size difference, but you wont be disapointed in the performance of the FlexNT
I hope this helps, and even if you find a FlexNExT available, I would suggest you consider an alternative.
There maybe another option at some stage, but what and when, I couldn’t tell you…