Data Sheet

Also you can use UART interface without cutting any connection, Seeeduino Mega(Arduino Mega) or
Seeeduino lite(Arduino Leonardo) are preferred. Following are the modified program.
#include "PN532_HSU.h"
#include "PN532.h"
#include "NfcAdapter.h"
PN532_HSU interface(Serial1);
NfcAdapter nfc = NfcAdapter(interface);
void setup(void) {
Serial.begin(115200);
Serial.println("NDEF Reader");
nfc.begin();
}
void loop(void) {
Serial.println("\nScan a NFC tag\n");
if (nfc.tagPresent())
{
NfcTag tag = nfc.read();
tag.print();
}
delay(5000);
}
Of course, you can communicate Grove - NFC with Seeeduino/Arduino UNO via UART interface, but
you can't get any information on the monitor of Arduino IDE.