ESP32 + NFC PN532

 ESP32 + NFC PN532 

//====================================================

// esp32-wroom-32 devkit v1 default pins

//       SCL D22

//       SDA D21

//====================================================

#include <Wire.h>

#include <PN532_I2C.h>

#include <PN532.h>

#include <NfcAdapter.h>

PN532_I2C pn532_i2c(Wire);

NfcAdapter nfc = NfcAdapter(pn532_i2c);

/* Uno's A4 to SDA & A5 to SCL */

//=============================================

void setup(void) {

  Serial.begin(115200);

  Serial.println("NFC TAG READER"); // Header used when using the serial monitor

  nfc.begin();

}

//=============================================

void loop(void) {

  Serial.println("\nScan your NFC tag on the NFC Shield\n");  // Command so that you an others will know what to do

  if (nfc.tagPresent())

  {

    NfcTag tag = nfc.read();

    Serial.println(tag.getTagType());

    Serial.print("UID: ");

    String UID=tag.getUidString();

    //Serial.println(tag.getUidString()); // Retrieves the Unique Identification from your tag

    Serial.println(UID); // Retrieves the Unique Identification from your tag

   

  }

  delay(5000);

}

//====================================================

// esp32-wroom-32 devkit v1 default pins

//       SCL D22

//       SDA D21

//====================================================

#include <Wire.h>

#include <PN532_I2C.h>

#include <PN532.h>

#include <NfcAdapter.h>

PN532_I2C pn532_i2c(Wire);

NfcAdapter nfc = NfcAdapter(pn532_i2c);

/* Uno's A4 to SDA & A5 to SCL */

//=============================================

void setup(void) {

  Serial.begin(115200);

  Serial.println("NFC TAG READER"); // Header used when using the serial monitor

  nfc.begin();

}

//=============================================

void loop(void) {

  Serial.println("\nScan your NFC tag on the NFC Shield\n");  // Command so that you an others will know what to do

  if (nfc.tagPresent())

  {

    NfcTag tag = nfc.read();

    Serial.println(tag.getTagType());

    Serial.print("UID: ");

    String UID=tag.getUidString();

    //Serial.println(tag.getUidString()); // Retrieves the Unique Identification from your tag

    Serial.println(UID); // Retrieves the Unique Identification from your tag

    if (tag.hasNdefMessage()) // If your tag has a message

    {

      NdefMessage message = tag.getNdefMessage();

      Serial.print("\nThis Message in this Tag is ");

      Serial.print(message.getRecordCount());

      Serial.print(" NFC Tag Record");

      if (message.getRecordCount() != 1) {

        Serial.print("s");

      }

      Serial.println(".");

      // If you have more than 1 Message then it wil cycle through them

      int recordCount = message.getRecordCount();

      for (int i = 0; i < recordCount; i++)

      {

        Serial.print("\nNDEF Record ");Serial.println(i+1);

        NdefRecord record = message.getRecord(i);

        int payloadLength = record.getPayloadLength();

        byte payload[payloadLength];

        record.getPayload(payload);

        String payloadAsString = ""; // Processes the message as a string vs as a HEX value

        for (int c = 0; c < payloadLength; c++) {

          payloadAsString += (char)payload[c];

        }

        Serial.print("  Information (as String): ");

        Serial.println(payloadAsString);

        String uid = record.getId();

        if (uid != "") {

          Serial.print("  ID: ");Serial.println(uid); // Prints the Unique Identification of the NFC Tag

        }

      }

    }

  }

  delay(5000);

}