環境

Arduino 1.8.10 Linux 版
- portable 化済
esp32 by Espressif Systems Version 1.0.3
Ubuntu Linux 20.04 AMD64
NFC library for Arduino
- https://github.com/elechouse/PN532
WEMOS LOLIN32
- ( ≒ ESP32 DevKitC )

ライブラリ修正

「ESP32 Arduino で error: 'boolean' does not name a type」
https://qiita.com/nanbuwks/items/d62157f6fccdbed54f86

のように、PN532_SPI.cpp を直しておきます。

スケッチ

Mifare カードを読むサンプルスケッチで試します。
「ファイル」-「スケッチ例」-「カスタムライブラリのスケッチ例」-「PN532」-「ReadMifare」を選びます。

スイッチ設定

以下の接続時には、それぞれ PN532 NFC RFID module 上のスイッチを接続に合わせて設定しています。

I2C接続

ESP32	PN532 NFC Module
GND	GND
3V3	VCC
SDA/21	SDA
SCL/21	SCL

実行結果



Hello!
Found chip PN532
Firmware ver. 1.6
Waiting for an ISO14443A Card ...
Found an ISO14443A card
  UID Length: 4 bytes
  UID Value:  D3 6A 93 05

Seems to be a Mifare Classic card (4 byte UID)
Trying to authenticate block 4 with default KEYA value
Sector 1 (Blocks 4..7) has been authenticated
Reading Block 4:
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................

OK

SPI接続

ESP32	PN532 NFC Module
3V3	VCC
(NC)	RSTQ
GND	GND
(NC)	IRQ
MISO/19	MISO
MOSI/23	MOSI
SCK/18	SCK
SS/5/LED	SS

接続設定に合わせて、スケッチの該当箇所を以下のように直します。


#if 1
  #include <SPI.h>
  #include <PN532_SPI.h>
  #include "PN532.h"

  PN532_SPI pn532spi(SPI, 5);
  PN532 nfc(pn532spi);
#elif 0
.
.
.

実行結果


Hello!
Found chip PN532
Firmware ver. 1.6
Waiting for an ISO14443A Card ...
Found an ISO14443A card
  UID Length: 4 bytes
  UID Value:  D3 6A 93 05

Seems to be a Mifare Classic card (4 byte UID)
Trying to authenticate block 4 with default KEYA value
Sector 1 (Blocks 4..7) has been authenticated
Reading Block 4:
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................

動きました

シリアル接続

ESP32	PN532 NFC Module
GND	GND
3V3	VCC
16 (Serial2 RX)	TXD
17 (Serial2 TX)	RXD



#if 0
  #include <SPI.h>
  #include <PN532_SPI.h>
  #include "PN532.h"

  PN532_SPI pn532spi(SPI, 5);
  PN532 nfc(pn532spi);
#elif 1
  #include <PN532_HSU.h>
  #include <PN532.h>
      
  PN532_HSU pn532hsu(Serial2);
  PN532 nfc(pn532hsu);
#else 
...

動きました


Hello!
Found chip PN532
Firmware ver. 1.6
Waiting for an ISO14443A Card ...
Found an ISO14443A card
  UID Length: 4 bytes
  UID Value:  D3 6A 93 05

Seems to be a Mifare Classic card (4 byte UID)
Trying to authenticate block 4 with default KEYA value
Sector 1 (Blocks 4..7) has been authenticated
Reading Block 4:
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................