nfcInterface.js

/*
const { NFC } = require('nfc-pcsc');
var nfcInterfaceCallback;
const nfc = new NFC(); // optionally you can pass logger

nfc.on('reader', reader => {

	console.log(`${reader.reader.name}  device attached`);

	// enable when you want to auto-process ISO 14443-4 tags (standard=TAG_ISO_14443_4)
	// when an ISO 14443-4 is detected, SELECT FILE command with the AID is issued
	// the response is available as card.data in the card event
	// see examples/basic.js line 17 for more info
	// reader.aid = 'F222222222';

	reader.on('card', card => {

		// card is object containing following data
		// [always] String type: TAG_ISO_14443_3 (standard nfc tags like MIFARE) or TAG_ISO_14443_4 (Android HCE and others)
		// [always] String standard: same as type
		// [only TAG_ISO_14443_3] String uid: tag uid
		// [only TAG_ISO_14443_4] Buffer data: raw data from select APDU response
        
        console.log(`${reader.reader.name}  card detected`, card);
       // if(nfcInterfaceCallback)nfcInterfaceCallback(card);

	});

	reader.on('card.off', card => {
		console.log(`${reader.reader.name}  card removed`, card);
		card.uid = reverseBytes(card.uid);
		if(nfcInterfaceCallback)nfcInterfaceCallback(card);
	});

	reader.on('error', err => {
		console.log(`${reader.reader.name}  an error occurred`, err);
	});

	reader.on('end', () => {
		console.log(`${reader.reader.name}  device removed`);
	});

});

nfc.on('error', err => {
	console.log('an error occurred', err);
});

function reverseBytes(id){
	var reverseId = "";
	for(var i = id.length; i >= 0 ; i-=2){
		reverseId+=id.substring(i-2,i);
	}
	console.log(reverseId)
	return reverseId;
}

*/