I have a 10 day old NExT install which feels very well settled now but I still really struggle to get a read on the LF side with my Proxmark3.
The HF side reads perfectly well with no problems and did after a day or two after install however I’ve only had a successful read (lf search) maybe once or twice with the flat antenna but never with the ProxLF and when I try a lf tune I can’t get the voltage to budge at all, except maybe 100mV sometimes but honestly not sure if that’s just noise or something else going on.
I can read other flat cards with the ProxLF no problem if I line up the card antenna perpendicular to the ProxLF coil as you would expect. Both lf search and lf t5 detect - no problems. My LF field detector keyring shaped like an implant lights up nice and bright too.
Am I just being too impatient or is something wrong?
[usb] pm3 → hw version
[ Proxmark3 RFID instrument ]
[ CLIENT ]
client: RRG/Iceman/master/v4.9237-3970-g899f269a9 2021-06-02 17:55:15
compiled with Clang/LLVM Apple LLVM 12.0.5 (clang-118.104.22.168) OS:OSX ARCH:x86_64
Can you get lf tune to change more with an external card? Does it make much difference which antenna you use with another card?
If a normal card shows a bigger change with either antenna then you are having issues reading the implant. If not then you might have issues with the proxlf antenna. You might want to make sure that it is connected well.
If it is just the implant I would give it a few more days, but keep checking. However I am no expert.
(Basically you want to make sure that your Proxmark3 is working, and that your antenna is working. If they are both working then you know it is reading the implant that is at issue.)
I’m also having the same problem, cannot get a reliable read. And in the rare occasion I can read something, it’s junk and changes every time. I don’t think it’s reliable enough to try writing.
I know it’s not due to swelling of a new implant, as it has been inside my hand for 3 years. I have to concede the implant is not so shallow as it was supposed to (the implantation procedure was not ideal), but some access controllers appear to detect it sometimes.
At first I didn’t mess with the LF because I didn’t have hardware to program it, then I bought a proxmark3 rdv2 (easy), but couldn’t get a reliable read. So I then bought the RDV4 with the antenna bundles, no luck either. So I bought the ProxLF antenna, also with disappointing results .
Did you get to solve your reading problems? I cannot get a read with any antenna
I never did get the ProxLF to work and I’ve heard several times since that it has been mostly disappointing.
It seems that although the LF side of the NExT does work well with readers it’s not great with the proxmark and requires very precise positioning.
My normal recommendation is that you use ‘lf tune’ to find a good location and then keep it there. Each time you attempt a write operation you must read it back to confirm it was successful. The t5577 chip is rather fickle to work with but that’s also what makes it so flexible so keep at it and you will get there!
Accurate, but at the same time, mine still works, just not as well I had hoped.
I wonder if sometimes for other people they may be trying to read perpendicular rather than parallel (how this antenna is specifically designed to work)
But, that positioning, once learnt, becomes easily repeatable, so generally , most read / write issues can be eliminated.