How to cut paper and the content after printing appears a P character

[ngvcanh]

Today, I installed this package and print success.

But I don't know how to cut paper after print?

And The content after printer appears a P character. My code:

const SerialPort = require('serialport');
const ThermalPrinter = require('thermalprinter');

function printSerial(){
  let serialPort = new SerialPort('COM2', { baudRate: 19200 });
  serialPort.on('open', function(){
      let printer = new ThermalPrinter(serialPort);
      printer.on('ready', function(){
        printer
        .printLine('Test')
        .printLine('Test')
        .printLine('Test')
        .printLine('Test')
        .printLine('Test')
        .printLine('Test')
        .print(function(){
          //printer.cut();
          console.log('done');
          //process.exit();
          serialPort.close();
        });
      });
    });
}

The content after print on paper:

PTest
Test
Test
Test
Test
Test

I'm using:

• Electron: 11.1.1
• serialport: 9.0.4
• thermalprinter: 0.3.8

And from this package, may I print from template content?

Thank advance so much for support