Saved key doesn't work, but detect reader unlocks door

NFC
#1

So I am trying to clone an NFC key for my apartment. After using Mfkey I can get 30/32 keys, and emulate won’t unlock the door. It gets weird when I read the original card and then select detect reader it can actually unlock the door. If I save it and run detect reader it doesn’t work and I still get stuck at 30/32 keys.

#2

Really weird.

  • NFC -> Extra Actions -> Read Specific Card Type -> Read NFC-A data, then emulate?
  • Touch the card for a moment, then skip bruteforce (the goal is zero keys)?
  • Detect Reader without selecting a card first?
#3

As far as I understood it, you do the detect reader to gather some of the keys that aren’t in the dictionary the Flipper came with. After you did the detect reader some data is being collected and you need to gather the keys from that data by running some calculations on them through the mobile app or the lab webapp.

Check out the docs here for more information and instructions: Recovering keys with MFKey32 - Flipper Zero - Documentation