Since last week I am also the happy owner of a Mifare DesFire EV2 8k Flex implant.
So far I have been able to integrate it into my applications without any problems.
However, our access control system (Mifare Desfire EV1, EV2 and EV3 cards are used here) is having problems recognizing the implant.
The card readers are Honeywell LuminAXS readers (027913.10). These only evaluate the UID for us. On my management PC, I can read the implant with a Honeywell Admitto (Mifare Classic / Mifare DESFire EV1 Art.026487-10) reader without any problems and the UID is also written to the software as with the other cards.
However, when I hold my hand to the reader on the door, nothing happens, neither positive nor negative acknowledgement.
I then read the implant once with my Flipper Zero, saved it and if I emulate it now, I can use it to open the door.
What I noticed, however, is that the Flipper Zero first recognizes the implant as a multichip (Mifare DesFire and EMV) and I am asked which data set of both I want to read.
I then have to confirm DESFire and can read and save the chip.
Could this be the problem?
Is it possible to deactivate the EMV function so that it is recognized as a pure Mifare Desfire chip?
If I understand correctly, EMV is intended as a payment option, which does not work here in Germany with this type of chip anyway ?
I hope I was able to describe my problem reasonably well
Ah ok… TagInfo doesn’t indicate any EMV applet AIDs at all… I bet it’s a Flipper “bug” where it detects APDU support and assumes it’s an EMV capable card… even if there are no EMV applets (see EMV2.png)
Yes, I did some reading yesterday and also saw that the support for ISO/IEC 7816-4 in particular could give the impression of an “EMV card” (as used for payment cards).
Do you have any idea what the problem might be with the Honeywell readers?
I have 2 other physical cards here in the appendix which can be read in the system without any problems. These are EV1 and EV3. Unfortunately I have not found an identical EV2 at the moment, but I have ordered one for testing.
I can’t tell from the ZIP files you sent what the system might be tripping up on. Can you confirm the reader is actually reading the flexDF2? Are there errors in the system logs for failed reads?
I tested a little further and could briefly read the implant on the outer edge.
I have now tested it with the 20mm repeater stickers and I can read the implant reliably.
I saw in the documents that there was an update at the end of 2023 that was supposed to improve the reading for DF EV2. I will have this carried out and test it further.
I also had a Mifare DesFire EV2 8k Flex (flexDF2) implanted in my hand. It is also recognized by my desktop readers Honeywell Admitto and Dangerous KBR1 RFID Reader without any problems.
It has not yet been recognized on the Honeywell LuminAXS. However, I have not yet tried the outer edge. I’ll have to check the firmware again tomorrow, but I can’t imagine that the readers that will be installed in 2025 still have old firmware on them.
Did you find a solution to the problem? Or what did you do?
Yes I had several conversations with the manufacturer as well. The problem with the readers is that they have a very weak range and therefore the voltage is not sufficient for the implant. This is probably intentional for safety reasons and certification. I was able to solve the problem with the small stickers. Repeater Sticker Pack – Optimiere deine NFC-Leserleistung | RFID NFC Reader/ Writer | Zubehör | Human Enhancements
I stuck these in the top left-hand corner of each reader and when I hold my implant up to them, it is read without any problems.
Thanks for your answer Thorsten, even if it is unfortunately not the answer I would have liked to hear…
I would appreciate the pictures of the stickers.
We are currently still in the process of installing the card readers (30 in total) and I am the only one with this “problem”. All the other employees have normal transponders.
Even if I am responsible for the system (I should have discovered the posting here earlier) I would have to see how much the stickers stand out in the edges.
Is it still possible to hold the transponder normally in the “center” of the card reader or is the sticker so strong that it directs the entire signal into the corner?
I’m from Germany, so Thorsten’s link works for me. I also ordered the implant there.
Sure, I’ll take some pictures of different readers tomorrow. We have just under 40 in use. And yes, the investment hurt
The readers continue to function normally as before, except that they are much more sensitive in the left corner. For example, I have one in a server room at belt height, and when NFC is turned on on my watch and I walk past it, it recognizes my watch at a distance of about 40 cm, which was not the case before
Unfortunately, at my company, it’s “still” only me who is affected; everyone else has cards or tags.
An alternative would be here:
I ordered a large quantity here first.
And yes, they have a small edge when they are stuck on, comparable to the thickness of the adhesive side of a plaster.
Hi,
here are the pictures. Yes I almost exclusively use readers without a keypad as we don’t use the pin. In the outside area there are 4 readers for arming/disarming but also without keypad as the sticker would not hold here
Thank you very much for the pictures and the videos.
I’ve just ordered a sticker pack and will have a look at it over the next few days.
We have some card readers with keypads so I’ll have to find a solution for that too.
I’ll keep you up to date.
Not directly in Frankfurt but rather near Mannheim. But everyone knows Frankfurt not so far away from you.
No problem, gladly.
Yes, the readers with keypad can be a problem. As we only arm/disarm using a transponder without a key, I had the readers with keypad replaced in good time. The winding of the antenna is also different here, as can be seen in the picture.
You also have to be careful not to have this small roof (rain cover) fitted to the outdoor readers. The readers do not need this as they are potted. Depending on where the chip is in your hand, it may get in the way.
Yes, Mannheim is in the other direction but still not far away
I would use one of these to find the optimum location of the stickers above by using one of these
Here is where I would open the reader and place the sticker on the INSIDE of the cover, this will protect the sticker, not draw attention to it and keep a clean, new professional look
I have now been able to test it with the stickers and the implant is indeed better recognized.
I will now also order Field Detector and see how I can position the stickers.
Unfortunately, the problem is that the card readers are potted (sealed). I probably have no choice but to place the stickers directly on the card readers
