Notecard vs Softcard on Node.js

main.js

const SerialPort = require('serialport')
const Readline = require('@serialport/parser-readline')
const port = new SerialPort('/dev/ttys001') // ** softcard **
//const port = new SerialPort('/dev/cu.usbmodemNOTE1') // ** notecard **
const parser = port.pipe(new Readline({ delimiter: '\r' }))

port.on('open', showPortOpen);
port.on('close', showPortClose);
port.on('error', showError);
//port.on('data', showSerialData);
parser.on('data', showSerialData);

function writeRequest() {
    port.write('{"req":"card.version"}\n');
}

function showPortOpen() {
    console.log('port open. Data rate: ' + port.baudRate);
    writeRequest();
}

function showPortClose() {
    console.log('port closed.');
}

function showError(error) {
    console.log('Serial port error: ' + error);
}

function showSerialData(data) {
    console.log(data.toString());
}