• Registered: 2011-12-28
  • Posts: 4

Topic: basic nfc-list and ACR122u question

Hi, I have a very basic question when it comes to the ACR122u. I've successfully installed libnfc-1.5.1 on Mac OS X Lion. I've also managed to run pcsctest and have it read some tags.

The ACR122u has a light indicator on the top right. It is red when there is no tag nearby, and green when there is a tag it can read. As  far as I can tell, nfc-list only works when I've put a tag within reading distance and the LED is green:

Smooth-Lightning:~ kevin$ nfc-list
nfc-list uses libnfc 1.5.1 (r1175)
Connected to NFC device: ACS ACR122U PICC Interface 00 00 / ACR122U207 - PN532 v1.6 (0x07)
1 ISO14443A passive target(s) found:
    ATQA (SENS_RES): 00  44  
       UID (NFCID1): 04  8e  13  ba  3f  23  80  
      SAK (SEL_RES): 00

Otherwise, it is red and I get this:


Smooth-Lightning:~ kevin$ nfc-list
nfc-list uses libnfc 1.5.1 (r1175)
nfc-list: ERROR: Unable to connect to NFC device.

Is this the correct behavior? It seems to make sense: it can only list tags when the card finds tags nearby.

Thanks,
Kevin

  • rconty
  • Administrator
  • Offline
  • Registered: 2009-04-22
  • Posts: 673

Re: basic nfc-list and ACR122u question

You seems to ba affected by the same problem reported here: (from half to end of discuss)
http://www.libnfc.org/community/topic/4 … acos-lion/

Romuald Conty
  • Registered: 2011-12-28
  • Posts: 4

Re: basic nfc-list and ACR122u question

rconty wrote:

You seems to ba affected by the same problem reported here: (from half to end of discuss)
http://www.libnfc.org/community/topic/4 … acos-lion/

Thanks for your reply. I've already tried setting ifdDriverOptions to 0x0005 and restarting pcscd. Unfortunately, I still have the same issue. For now, it's not really affecting me since I just put an NFC tag nearby and read/write to it anyway.