NFC payload can be configured after setting the payload?

RE: NFC payload can be configured after setting the payload?

Kenneth — Thu, 06 Feb 2020 18:52:32 GMT

Hi,

What happens is, that the T2T lib only allows tag data modification while emulation is stopped meaning you need to callnfc_t2t_emulation_stop() and reinitialize to do this safely.

Otherwise, the application can always change the data in the buffer provided to NFC (not using nfc_t2t API ), but then there is a risk of sending inconsistent data to the NFC Reader (e.g. when copying new data once a DMA transfer in NFCT is active).

If the you decide to re-start the NFC using emulation_stop() and emulation_start(), then yes, typically after restart there will come FIELD_ON event, though this depends on the exact behavior of an NFC Reader. Generally FIELD_ON event means the Reader is in range and has Selected the nRF tag for communication.

Best regards,
Kenneth

RE: NFC payload can be configured after setting the payload?

NITHIN ABHIMANUE — Thu, 06 Feb 2020 04:25:34 GMT

Is it possible without calling nfc_t2t_emulation_stop() and reinitialize.

Because If it is reinitialized then it will detect a new FIELD_ON in the same session right?

After polling NFC_T2T_EVENT_DATA_READ, Is it possible to change the string and get another NFC_T2T_EVENT_DATA_READ?

RE: NFC payload can be configured after setting the payload?

Kenneth — Wed, 05 Feb 2020 18:23:20 GMT

Could the procedure suggested here work?
https://devzone.nordicsemi.com/f/nordic-q-a/19627/nrf52-nfc-record_text-example