Pure Theatre RS232

down.js

var SerialPort = require('serialport');
var port = new SerialPort('/dev/tty.usbserial', {
    baudRate: 9600
});

port.on('open', function() {
    console.log('open')
    port.write(new Buffer('#DDN\r'), (err, res) => {
        if (err) {
            return console.log('err', err)
        }
        console.log('sent!', res)
    })
});

// open errors will be emitted as an error event
port.on('error', function(err) {
    console.log('Error: ', err.message);
})

package.json

{
  "name": "pure-theatre",
  "version": "1.0.0",
  "description": "",
  "main": "app.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "serialport": "^6.0.5"
  }
}

up.js

var SerialPort = require('serialport');
var port = new SerialPort('/dev/tty.usbserial', {
  baudRate: 9600
});

port.on('open', function() {
  console.log('open')
  port.write(new Buffer('#DUP\r'), (err, res) => {
    if (err) {
      return console.log('err', err)
    }
    console.log('sent!', res)
})
});

// open errors will be emitted as an error event
port.on('error', function(err) {
  console.log('Error: ', err.message);
})