can not read data

[Than890]

can not get any data

this is my code

const SerialPort = require('serialport');

const port = new SerialPort(
'COM6',
{
baudRate: 9600
, dataBits: 8,
stopBits: 1,
parity: 'none'
}
)

const parser = new SerialPort.parsers.Readline()
port.pipe(parser)

//open
port.on('open', (err) => {

//Verifica si hay error al abrir el puerto
if (err) {
    return console.log('Error opening port: ', err.message);
}

console.log('Port Opened');
//console.log(port);

});

port.on('error', function (err) {
console.log('Error: ', err.message);
})

//readable
port.on('readable', function (err) {

if (err) {
    return console.log('Error al leer el puerto: ', err.message);
}

console.log('Data:', port.read());

});

parser.on('data', (line) => {
console.log(line);

});

port.on('close', function (err) {
console.log(err);
});