seeed Grove-NFC (PN532) 近場通訊模組 I2C/UART

• Grove – NFC x1,
• NFC Antenna x1,
• IPX connect wire – 120mm x1,
• 24AWG Grove Cable  – 4P-4P-2.0-200mm x1

使用說明

下面介紹如何使用近場通訊模組。

1. 用Grove連接線把模組連接到Grove基板I2C的Grove口上。
2. 把Grove基板插到Arduino板上，Arduino板用USB連接線連到電腦上。
3. 下載PN532庫文件，把下面4個文件夾（PN532、PN532_SPI、PN532_I2C 、PN532_HSU放到Arduino庫函數位置。
4. 下載Don’s NDEF庫文件，同樣安裝到Arduino庫函數的位置。
5. 重啟Arduino IDE。打開文件->示例->NDEF->ReadTag。
6. 使用NDEF庫文件提供的I2C接口，需要焊掉背面P1和UART的連接，焊通P1和I2C。注意：Seeeduino Mega、Arduino Mega、Seeeduino lite、Arduino Leonardo也可以使用UART接口，需使用下面更改後的代碼。

當然你也可以使用UART接口而不需要額外的切割工作，這種情況下最好使用Seeeduino Mega(Arduino Mega) or Seeeduino lite(Arduino Leonardo)。下面是更新的程序：

#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 ( " n Scan a NFC tag n " ) ; 
    if  ( nfc. tagPresent ( ) ) 
    { 
        NfcTag tag = nfc. read ( ) ; 
        tag. print ( ) ; 
    } 
    delay ( 5000 ) ; 
}

也可以使用Seeeduino或Arduino的UART接口和近場通訊模塊通訊，但無法使用串口監視器。

Documents

Grove – NFC wiki

Grove – NFC

Near Field Communication (NFC) is a set of short-range wireless technologies. It’s behind daily applications such as access control system and mobile payment system.

Grove NFC features a highly integrated transceiver module PN532 which handles contactless communication at 13.56MHz. You can read and write a 13.56MHz tag with this module or implement point to point data exchange with two NFCs. Grove NFC is designed to use I2C or UART communication protocols, and UART is the default mode. In addition, we assign an independent PCB antenna which can easily stretch out of any enclosure you use, leaving more room for you to design the exterior of your project.

Specification

• Working Voltage: 3.3V
• Working Current: Static Mode: 73mA, Write/Read Mode: 83mA
• Support host interface: I2C, UART(default).
• Serve for contactless communication at 13.56MHz.
• Support ISO14443 Type A and Type B protocols.
• Max operating distance for detecting NFC tags is 28mm depending on current antenna size.
• Support P2P communication.
• Dimensions: 25.43mm x 20.35mm

Part List

• Grove – NFC x1
• NFC Antenna x1
• IPX connect wire – 120mm x1
• 24AWG Grove Cable – 4P-4P-2.0-200mm x1