Issue with card reader previously attached

[elia9090]

Hi, first of all, thanks for your library. I'm using your library on an Electron app with an ACR122U card reader and Mirafare Classic tags. Everything works perfectly but if the app starts and the reader is already attached to the PC it does not register it.

I tried to use the usb-detection library and the device is correctly shown.

Can you help me?

[mathiscode]

+1; I'm not using Electron, but I have a similar issue. I have to physically disconnect/reconnect the reader before the nfc.on('reader') listener gets fired.

[mlongo4290]

+1; Same issue here. I'm on an electron app.

[mlongo4290]

I've found out!! doing new NFC() right after the require lead to our issue. So instead of doing this

const { NFC } = require('nfc-pcsc');
const nfc = new NFC(); //THIS LEAD TO OUR ERROR
//other code
app.on('ready', function() {
    //your code
    nfc.on('reader', reader => {//handle reader});
})

We must do this

const { NFC } = require('nfc-pcsc');
//other code
app.on('ready', function() {
    //your code
    const nfc = new NFC(); //THIS HANDLES ALREADY CONNECTED READER IN THE RIGHT WAY
    nfc.on('reader', reader => {//handle reader});
})