cs-acn/examples/bin.js

Control Solutions Adaptive Control Network

#!/usr/bin/env node
/**
 * This is a serial port listener that outputs to the console.
 * It is not an ACN-specific utility, it is really for development/
 * debugging of a serial debug stream
 *
 */

'use strict';

// console text formatting
var chalk = require('chalk');

// command-line options
var program = require('commander');

// Module which manages the serial port
var serialPortFactory = require('serialport');


// Define the command line option parser
program
  .option('-p, --port <port>', 'Port on which to listen')
  .parse(process.argv);


/**
 * If error, print it and exit the application
 * @param  {err}
 * @return null
 */
function handleError( err ) {
  if( err ) {
    console.log( chalk.red( err.message ) );
    process.exit(1);
  }

}

console.log(
  chalk.blue.bold('--------Serial Monitor: ' + program.port + '----------'));
console.log( 'Press CTRL-C to exit' );

var port = new serialPortFactory.SerialPort( program.port, {baudrate: 19200 } );

// Attach event handler for the port opening
port.on( 'open', function () {
  console.log( chalk.green('Port ' + program.port + ' opened' ));
});


// get console input line by line
var stdin = process.openStdin();
stdin.on('data', function(chunk) {

  // split into an array based on whitespace
  var token = chunk.toString().trim().split(/\s+/);

  if( token[0] === 'q') {
    process.exit();
  }
  else {
    // send it to the port
    port.write( token[0] );
  }
});


// Attach event handler for the port opening
port.on( 'data', function (data) {
  process.stdout.write( data );
});


// port errors
port.on('error', function( err ) {
  console.log( chalk.underline.bold( this.path + ' error: ', err.message ));
});


console.log('------------------');