NDEF file

The NDEF file library stores the length and content of the NDEF message. Use this library to encode standardized data for the NFC Type 4 Tag. To generate an NDEF message, you can use the NDEF messages and NDEF records libraries.

The following code sample demonstrates how to encode the NDEF file for NFC Type 4 Tag:

int ndef_file_encode(uint8_t *buff, uint32_t *size)
{
        int err;
        uint32_t ndef_size = nfc_t4t_ndef_file_msg_size_get(*size);

        /* Encode NDEF message into buffer. */
        err = nfc_ndef_msg_encode(&NFC_NDEF_MSG(my_message),
                                  nfc_t4t_ndef_file_msg_get(buff),
                                  &ndef_size);
        if (err) {
                return err;
        }

        err = nfc_t4t_ndef_file_encode(buff, &ndef_size);
        if (err) {
                return err;
        }

        *size = ndef_size;
        return 0;
}

The NFC: Text record for Type 4 Tag sample demonstrates full usage.

API documentation

Header file: bm/nfc/t4t/ndef_file.h

Source file: subsys/nfc/t4t/ndef_file.c

NDEF file API reference