serialport/bin/echo.js

Node.js package to access serial ports. Linux, OSX and Windows. Welcome your robotic JavaScript overlords. Better yet, program them!

#!/usr/bin/env node

const args = require('commander')

const SerialPort = require('../')
const version = require('../package.json').version

const readyData = Buffer.from('READY')

args
  .version(version)
  .usage('-p <port>')
  .description(
    'A basic terminal interface for communicating over a serial port. Pressing ctrl+c exits.'
  )
  .option('-p, --port <port>', 'Path or Name of serial port')
  .parse(process.argv)

if (!args.port) {
  args.outputHelp()
  args.missingArgument('port')
  process.exit(-1)
}

const port = new SerialPort(args.port)

port.on('open', () => {
  console.log(`echo: Port open: ${args.port}`)
  setTimeout(() => {
    console.log('echo: READY!')
    port.on('data', data => port.write(data))
    port.write(readyData)
  }, 250)
})