// use import
// import Rdm6300 from 'node-rdm6300';
// use require
const Rdm6300 = require('node-rdm6300').default;
const rdm = new Rdm6300({ path: '/dev/tty.usbserial-0001' });
rdm.on('cardIn', (cardId) => {console.log('card in', cardId);});
rdm.on('cardOut', () => {console.log('card out');});
rdm.on('open', () => {console.log('serialport open');});
rdm.on('error', (e) => {console.log('serialport error', e);});