NFC Reader Library how to know if phone read is success or fail

[emmanuel_sanche]

Hi,

I'm using the NFC Reader Library to run the PN5180 in card emulation mode (NfcrdlibEx8_HCE_T4T.c). I can successfully read the NDEF content with a phone. However, I noticed that if I move the phone too quickly or I move it out of range before the read finishes, I get a message "No NDEF Detected" on the NXP TagWriter app.

Is it possible for the PN5180 to know if the phone finished reading the tag successfully?

I set a breakpoint in T4TCardEmulation() immediately after status = phceT4T_Activate(pceT4T); and a breakpoint in TApplication() immediately after status = phceT4T_AppProcessCmd(...);. The breakpoints hit when the phone moves out of range after reading the tag, but the statuses do not tell me if the phone read was a success or fail.

Is there a way to distinguish?

Thank you!

[IvanRuiz]

Hello,

It is rather in the smartphones side programming to verify that the data was properly read. You may also implement an acknowledge sent from the reader to tag if e.g. data matches a kind of CRC implemented on your tags side.

BR,

Ivan.