Basic example modified to use an already running Chrome browser

useRunningBrowser.js

// google_search.js
var chromeDriver = require('chromedriver'), // Auto install ChromeDriver
    webdriver = require('selenium-webdriver'),
    By = webdriver.By,
    until = webdriver.until;

var chrome = require("selenium-webdriver/chrome");
var options = new chrome.Options();
options.options_["debuggerAddress"] = "127.0.0.1:6813";
var driver = new webdriver.Builder()
    .forBrowser('chrome')
    .setChromeOptions(options)
    .build();

function start() {
  driver.get('http://www.google.com/ncr');
  driver.findElement(By.name('q')).sendKeys('webdriver');
  driver.findElement(By.name('btnG')).click();
  driver.wait(until.titleIs('webdriver - Google Search'), 1000);
  setTimeout(function () {console.log('HI');}, 10000);
}

process.on('SIGTERM', function shutdown() {
  driver.quit();
});

start();

To test launch Chrome before the script like this:
chrome.exe --remote-debugging-port=6813

Hi, Can you please let me know how to achieve this with WebDriverIO? Thanks.