Simple node.js script to test the Serial output of an Arduino.

log.js

// run 'npm i serialport terminal-overwrite' before running this!

const SerialPort = require('serialport')
const Readline = require('@serialport/parser-readline')
const terminalOverwrite = require('terminal-overwrite');

const BAUD_RATE=9600
const PORT="ENTERYOURPORTHERE"

const port = new SerialPort(PORT, { baudRate: BAUD_RATE })

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

parser.on('data', terminalOverwrite)

console.log('Press a key at any time to exit...');

process.stdin.setRawMode(true);
process.stdin.resume();
process.stdin.on('data', process.exit.bind(process, 0));