NDEF file

The NDEF file 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 modules.

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

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

	/* Encode URI message into buffer. */
	err = nfc_ndef_uri_msg_encode(NFC_URI_HTTP_WWW,
				      m_url,
				      sizeof(m_url),
				      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;
}

API documentation

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

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

NFC NDEF File