Www.elechouse.com PN532 NFC RFID Module Manual

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PN532 NFC RFID Module User Guide

Introduction

NFC is a popular technology in recent years. We often heard this word while smartphone company such as Samsung or HTC

introduces their latest high-end phones. Almost all the high-end phones in the market support NFC.

Near field communication (NFC) is a set of standards for smartphones and similar devices to establish radio communication with

interface such as UART or SPI, this module also makes it easy to connect those pins.

Features

1. Work in NFC Mode or RFID reader/writer Mode

2. RFID reader/writer mode support

3. Plug and play, Arduino compatible

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8. Exchange data with other NFC devices such as smartphone

9. Gold plated PCB, more durable under extreme environment

Interface

The I2C interface is configured as the default interface. But you could change the interface by setting the configuration pads.

Here we use 0 ohm resistors to bridge the pad (The factory requires so for efficiency reason). In fact, Resistor is not necessary. The

If you use HSU (high speed UART) , you could find the pins definition on the back of this module.

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In fact, we add all the pin definition on the back. It is useful for some developers. In the developer kits, we will supply pins and wires

for all those interface. You don’t worry about how to connect wire from the 1.27mm spacing interface.

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GND <--------------------> GND

5V <---------------------> VCC

SDA <---------------------> SDA

SCL <---------------------> SCL

Function Test

Here we will show you several functions of this PN532 module. We did the test with Arduino.

RFID Reader/Writer

Here we show how to read and write RFID card with this module.

Click here to download the library. We added comments in the code to help understanding.

void setup(void)

{

Serial.begin(9600);

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nfc.begin();

Serial.println("MF1S50 Reader Demo From Elechouse!");

uint32_t versiondata = nfc.get_version();

if (! versiondata) {

Serial.println((versiondata>>24) & 0xFF, HEX);

Serial.print("Firmware ver. ");

Serial.print((versiondata>>16) & 0xFF, DEC);

Serial.print('.');

Serial.println((versiondata>>8) & 0xFF, DEC);

/** Set normal mode, and disable SAM */

nfc.SAMConfiguration();

}

sta = nfc.InListPassiveTarget(buf);

/** check state and UID length */

if(sta && buf[0] == 4){

/** the card may be Mifare Classic card, try to read the block */

Serial.print("UUID length:");

Serial.print(buf[0], DEC);

Serial.println();

Serial.print("UUID:");

nfc.puthex(buf+1, buf[0]); // print out the UID

sta = nfc.MifareAuthentication(0, blocknum, buf+1, buf[0], key);

if(sta){

/** create array to save block data read from the card*/

u8 block[16];

Serial.println("Authentication success.");

/***********************************************************

The following are examples to write data to RFID card. To

protect user’s data in RFID card. By Default we disabled it.

Serial.println("Write block successfully:");

}

*/

/***********************************************************

The following are examples to read data from RFID card.

***********************************************************/

/** read block 4 */

sta = nfc.MifareReadBlock(blocknum, block);

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nfc.puthex(block, 16);

Serial.println();

}

Serial.println();

}

/** read block 6 */

sta = nfc.MifareReadBlock(blocknum+2, block);

if(sta){

Serial.println("Read block successfully:");

nfc.puthex(block, 16);

Serial.println();

nfc.puthex(block, 16);

Serial.println();

}

}

}

}

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Here we need two Arduino boards to test this function. Basically we will program one NFC module as Initiator, and the other as

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Target: