I have an ACR122 and I am trying to connect to it using lib-nfc. (is this the correct step?) I don't have much knowledge regarding NFC (any links for beginners in C for linux are appreciated)
I have lib-nfc on my machine (centos 6.5 64bit) and if I do nfc-list I get:
NFC device: ACS / ACR122U PICC Interface opened
So I assume it is connected (I don't see any red light on) When I try to run the ./nfc-pool example I get this:
/home/user/acr122/libnfc/examples/.libs/lt-nfc-poll uses libnfc libnfc-1.7.1-11-gbb9babb
NFC reader: ACS / ACR122U PICC Interface opened
NFC device will poll during 30000 ms (20 pollings of 300 ms for 5 modulations)
error libnfc.driver.acr122_usb Invalid RDR_to_PC_DataBlock frame
nfc_initiator_poll_target: Input / Output Error
What am I doing wrong? Any links to tutorials or books regarding NFC/USB communication are welcomed with examples in C if possible. I am really trying to learn and not have someone write anything for me.
Thanks