list.js

const { SerialPort } = require('serialport')

async function listSerialPorts() {
  await SerialPort.list().then((ports, err) => {
    if (err) {
      // document.getElementById('error').textContent = err.message
      console.error(err.message)
      return
    } else {
      // document.getElementById('error').textContent = ''
    }
    console.log('ports', ports)

    if (ports.length === 0) {
      // document.getElementById('error').textContent = 'No ports discovered'
      console.error('No ports discovered')
    }

    // tableHTML = tableify(ports)
    // document.getElementById('ports').innerHTML = tableHTML
  })
}

function listPorts() {
  listSerialPorts()
  setTimeout(listPorts, 2000)
}

// Set a timeout that will check for new serialPorts every 2 seconds.
// This timeout reschedules itself.
setTimeout(listPorts, 2000)

listSerialPorts()

package.json

{
  "name": "turnstile-app",
  "version": "1.0.0",
  "description": "",
  "main": "test.js",
  "scripts": {
    "test": "node test.js",
    "list": "node list.js"
  },
  "author": "",
  "license": "ISC"
}

test.js

const { SerialPort } = require('serialport')

async function listSerialPorts() {
  await SerialPort.list().then((ports, err) => {
    if (err) {
      // document.getElementById('error').textContent = err.message
      console.error(err.message)
      return
    } else {
      // document.getElementById('error').textContent = ''
    }
    console.log('ports', ports)

    if (ports.length === 0) {
      // document.getElementById('error').textContent = 'No ports discovered'
      console.error('No ports discovered')
    }

    // tableHTML = tableify(ports)
    // document.getElementById('ports').innerHTML = tableHTML
  })
}

function listPorts() {
  listSerialPorts()
  setTimeout(listPorts, 2000)
}

// Set a timeout that will check for new serialPorts every 2 seconds.
// This timeout reschedules itself.
// setTimeout(listPorts, 2000)

// listSerialPorts()

const ON = [0xff, 0x01, 0x01]
const OFF = [0xff, 0x01, 0x00]

const path = '/dev/tty.usbserial-AB0LBJ9Q'
const serialport = new SerialPort({ path, baudRate: 9600 })

serialport.on('open', function() {
  console.log(serialport + ' is open')

  async function test(param) {
    serialport.write(Buffer.from(param))

    console.log('changed to', param === ON ? 'ON' : 'OFF')

    setTimeout(() => {
      test(ON === param ? OFF : ON)
    }, 1000)
  }

  test(ON)
})

async function test(param) {
  const x = serialport.write(param)

  console.log('changed to', param === ON ? 'ON' : 'OFF')

  setTimeout(() => {
    test(ON === param ? OFF : ON)
  }, 1000)
}

// test(ON)

test.md

https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/ppr/en-us/public/products/discontinued/scanners/genesis-7580g/sps-ppr-7580-ug.pdf

https://support.honeywellaidc.com/s/article/How-to-get-the-scanner-to-communicate-via-virtual-COM-port-USB-serial-driver

https://support.virtuagym.com/s/article/Honeywell-Genesis-7580g-Installation-Guide?language=en_US