I have had my NExT a little under a month and was going good, played around mostly with the xNT side because I could just use my phone. I did add the xEM to my front door so I know it was working but about a week ago It stopped responding. I bought a proxmark3 easy to diagnose and build a pretty good antenna but I am not getting anything.
I have tried the following-
lf t55xx detect
lf t55xx p1detect
lf t55xx wipe
lf t55xx write b 0 d 00088040
lf t55xx write b 1 d E0150A48 1
lf t55xx write b 2 d 2D782308 1
still no detect
I have confirmed I have no issues with a another t55 card
lf t55xx trace looks the same as if I have nothing on the antenna
I stand to be corrected here, I’m no expert on Proxmark commands.
The NExt is a T5577 chip but comes pre-configured as a EM4100 so it will work with the DT EM access controller.
Therefore my guess is just use a generic lf search
and that should “see it”
Again I could be wrong, but it’s worth a crack…
I suspect the antenna is your issue. It’s very difficult to read/write to the tags, the shape and position of the antenna needs to be pretty perfect. Have you ever been able to get a response from your tag using this antenna and the lf search command?
I had not read or written to the xEM with the proxmark prior to needing to diagnose the issue with it. But I do understand the importance of a good antenna and positioning on the antenna. I have the test 125hz led to check position and have found the best spot on the antenna I built. lf search finds nothing
Yeah I have the xEM Access controller and it was enrolled and working but just stopped one day that’s what prompted me to get a proxmark and investigate. Clearing the Access controller and trying to renrole gives no result also it still works with fobs. I have a feeling that the xEM silicone has died. I build an antenna to use with the proxmark and is tuned to 125khz. I dont think this is an coupling issue with the proxmark
EXACT same?
Both LF and HF?
Can you share some more details?
Hopefully we can help you figure out a solution…
What diagnostic tools do you have?
When did it stop working? HF / LF
I know that was November 2019, but in case anyone else sees this, that antenna works with the Proxmark3 RDV4, not the Proxmark3 Easy that Dangerous Things sell.
Just the lf has stopped working, it was 2 days I think, I was playing with it with the proxmark and it got less and less reliable untill I couldn’t find anything with an ‘lf search’
When you first install, there is a little trauma but your body has fully fought back, slowly your body starts to blood pool and swell (even though it is not always obvious from the outside)
Think of the swelling and of reduction of readability like a bell curve.
this is sorta the key i think… chances are it’s left in a misconfigured state and LF SEARCH will not find anything if it’s not configured perfectly. I would try this;
so it’s getting different data each time you run a dump? it looks almost like noise. how’s your antenna positioning? is someone helping you by pressing enter or are you juggling all that yourself?
PS … just asked iceman if he could add a delay to the search / clone commands…
just a small suggestion that is a serious pain in the ass for a small group of people… adding a delay to any kind of operation would be very helpful. Basically when you are trying to position a proxmark3 over your implant you are typically using one hand to hold the proxmark3 over the other… and then having to use an elbow or awkwardly extended finger to press enter… if a settable delay could be added as a parameter to allow like -d 3 to delay 3 seconds before executing… it would be super helpful. the most important commands of course are the hf/lf search and various cloning commands.
