Grove NFC


I have a problem with the Grove NFC (v1.1). I am just not able to find any NFC tag with it. I have just copied the example code

[code]#include “PN532_HSU.h”
#include “PN532.h”
#include “NfcAdapter.h”

PN532_HSU interface(Serial1);
NfcAdapter nfc = NfcAdapter(interface);

void setup(void) {
Serial.println(“NDEF Reader”);

void loop(void) {
Serial.println("\nScan a NFC tag\n");
if (nfc.tagPresent())
NfcTag tag =;

but it doesn’t work. I have a Arduino Mega with the Mega Grove Shield. The Grove NFC is connected to UART1. I have tried many different NFC Tags, right now I have Mifare Classic Tags with a 4 byte UID. I also have multiple NFC Grove chips and it works with none of them. The connection to the chip works, I can communicate with the chip e.g. get the firmware version, but I am not able to find any tag.

Can you give me any hint what else could be wrong?

Hi there, we suspect the tag issue. the tag is quite different as others. it works at 13.56MHz and support ISO14443 Type A and Type B. protocols. We do not have any this kinds of tag on sale. Please try to search through the amazon/ebay. Thanks.

Seeed techsupport team