Il giorno lunedì 21 gennaio 2013 18:12:30 UTC+1, Nikolay Elenkov ha scritto: > > On Tue, Jan 22, 2013 at 1:56 AM, Eliseo Baruzzi > <[email protected] <javascript:>> wrote: > > Hello, > > > > is it possible to use Card Emulation on Android? > > Generally, yes. Depends on the NFC controller and software support. > That's how Google Wallet works. > > > Using a Samsung Galaxy S II smartphone, If I put it close to an RFID > reader > > I can read a random UID from the smartphone. What kind of UID is that? > Is it > > related to NFC controller? It seems that it can emulate a Mifare 4K tag > or a > > Smart MX card. Is it possible to get a fixed UID from this NFC phone, > and in > > general from any NFC phone that allows card emulation? > > As you have seen, it's a random UID. I don't remember the details off > hand, but > a certain range is allocated for random UIDs, so each time you will > get some UID > in this range. You can't fix the UID, at least not with any of the > standard NXP > controllers. > > What are you trying to do? > What I want to do is to use the UID received from the phone to read/write the tag emulated on the phone. Another application possible is to use the phone in access control applications, but a fixed UID is necessary. The UID is random for security reasons? How Card Emulation can be used if the UID is random?
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