Type 2 Tag parser

The nRF Connect SDK provides functionality to read the content of an NFC tag. Note that an nRF5 Series IC does not provide the hardware that is required for a polling device. If you want to create a polling device, you can use an ST25R3911B NFC shield together with an nRF5 Development Kit.

Using the NFC Reader ST25R3911B, you can read raw data from a Type 2 Tag, such as:

Number of TLV structures in the tag
Type 2 Tag internal bytes
Type 2 Tag lock bytes
Type 2 Tag capability container
Array of pointer to the TLV structures of the tag

See the NFC: Tag reader sample for more information on how to do this.

The following code example shows how to parse the raw data from a Type 2 Tag:

/* Buffer with raw data from a Type 2 Tag. */
uint8_t raw_tag_data[] = ..;

/* Declaration of Type 2 Tag structure which
 * can contain a maximum of 10 TLV blocks.
 */
NFC_T2T_DESC_DEF(tag_data, 10);
struct nfc_t2t *t2t = &NFC_T2T_DESC(tag_data);

err = nfc_t2t_parse(t2t, raw_tag_data);
if (err) {
        printk("Not enough memory to read the whole tag. Printing what has been read.\n");
}

/* Print the tag data. */
nfc_t2t_printout(t2t);