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Izabela Grubicka » nfc_test.ino

Izabela Grubicka, 17/07/2026 15:46

 
//https://fr.38-3d.co.uk/blogs/blog-38-3d-3/comment-utiliser-le-lecteur-rfid-nfc-pn532-avec-arduino

#include <Wire.h>
#include <Adafruit_PN532.h>

#define SDA_PIN 21
#define SCL_PIN 22

Adafruit_PN532 nfc(SDA_PIN, SCL_PIN);

void setup() {
Serial.begin(115200);
Serial.println("PN532 RFID/NFC Reader Test");

nfc.begin();

uint32_t versiondata = nfc.getFirmwareVersion();
if (!versiondata) {
Serial.println("Didn't find PN532 module. Check connections.");
while (1);
}

Serial.println("Found PN532 module.");
nfc.SAMConfig(); // Configure the module in normal mode
Serial.println("Waiting for an NFC card...");
}

void loop() {
uint8_t success;
uint8_t uid[] = { 0 }; // Buffer to store UID
uint8_t uidLength; // Length of the UID

// Check if an NFC card is present
success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);

if (success) {
Serial.println("Found an NFC card!");
Serial.print("UID Length: ");
Serial.print(uidLength, DEC);
Serial.println(" bytes");
Serial.print("UID Value: ");
for (uint8_t i = 0; i < uidLength; i++) {
Serial.print(" 0x");
Serial.print(uid[i], HEX);
}
Serial.println("");
delay(1000); // Wait 1 second
}
}
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