Grove NFC Tag

Grove - NFC Tag is a highly integrated Near Field Communication Tag module,this module is I2C interface,which base on M24LR64E-R,M24LR64E-R have a 64-bit unique identifier and 64 -Kbit EEPROM.Grove - NFC Tag attach 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.

Specifications

• Working Voltage:5V or 3V3

• Working Current<1mA

• Effective range<2cm

• Serve for contactless communication at 13.56MHz

• ISO 15693 and ISO 18000-3 mode 1 compatible

• 64-bit unique identifier (UID)

• Read Block & Write (32-bit blocks)

• Grove I2C Interface

!!!Tip More details about Grove modules please refer to Grove System

Platforms Supported

Usage

Read/Write from Mobile

1. Download NfcV-reader for Android and install it

2. We can Read/Write it from Mobile

Control LED

1. Hardware Installation

1. Download NfcV-reader for Android and install it

2. Download NFC Tag Lib, rename it to NFC_Tag_M24LR6E and put it into Arduino's library .

3. Open Arduino IDE. If Arduino IDE is already opened, restart it.

4. In Arduino IDE, click menus: File -> Example -> NFC_Tag_M24LR6E -> ledControl

5. Now, you can control LED from your phone.

#include "NfcTag.h"
#include <Wire.h>

NfcTag nfcTag;
int led = 5;
bool flag = false;
bool preFlag = false;
void setup(){
  Serial.begin(9600);
  pinMode(led,OUTPUT);
  nfcTag.init();
}

void loop(){
  flag = nfcTag.readByte(EEPROM_I2C_LENGTH-1) == 0xff?true:false;
  if(flag != preFlag){
    Serial.println("get remote NFC control signal!");
    if(flag == true){
      Serial.println("led will light up!");
      digitalWrite(led,HIGH);
    }else{
      Serial.println("led will turn dark!");
      digitalWrite(led,LOW);
    }
    preFlag = flag;
  }
  delay(5*1000);
}

Resources

• Grove - NFC Tag.PDF

• Grove - NFC Tag Eagle file

• M24LR64E-R datasheet.pdf

• NfcV-reader for Android

• NFC Tag M24LR6E Lib