serialport/bin/repl.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 repl = require('repl')
const promirepl = require('promirepl').promirepl

process.env.DEBUG = process.env.DEBUG || '*'
const SerialPort = require('../')

// outputs the path to an arduino or nothing
function findArduino() {
  return new Promise((resolve, reject) => {
    const envPort = process.argv[2] || process.env.TEST_PORT
    if (envPort) {
      return resolve(envPort)
    }
    SerialPort.list((err, ports) => {
      if (err) {
        return reject(err)
      }
      let resolved = false
      ports.forEach(port => {
        if (!resolved && /arduino/i.test(port.manufacturer)) {
          resolved = true
          return resolve(port.comName)
        }
      })
      if (!resolved) {
        reject(
          new Error(
            'No arduinos found. You must specify a port to load.\n\nFor example:\n\tserialport-repl COM3\n\tserialport-repl /dev/tty.my-serialport'
          )
        )
      }
    })
  })
}

findArduino()
  .then(portName => {
    console.log(`port = SerialPort("${portName}", { autoOpen: false })`)
    console.log('globals { SerialPort, portName, port }')
    const port = new SerialPort(portName, { autoOpen: false })
    const spRepl = repl.start({ prompt: '> ' })
    promirepl(spRepl)
    spRepl.context.SerialPort = SerialPort
    spRepl.context.portName = portName
    spRepl.context.port = port
  })
  .catch(e => {
    console.error(e.message)
    process.exit(1)
  })