CHIRIMENとherokuを使って20分でIoTを始める方法 ref: http://qiita.com/naokisekiguchi@github/items/84a497bde653568a12da

file0.txt

$ heroku login
Enter your Heroku credentials.
Email: name@example.com
Password:

file1.txt

$ git clone https://github.com/naokisekiguchi/gpio-on-the-web.git
$ cd gpio-on-the-web
$ heroku create

file2.txt

$ git push heroku master
$ heroku open

main.js

'use strict';

window.addEventListener('load', function (){

// WebGPIO LED Blink
  navigator.requestGPIOAccess()
    .then(gpioAccess=>{
      var port = gpioAccess.ports.get(198);
      var v = 0;
      return port.export("out").then(()=>{
        setInterval(function(){
          v = v ? 0 : 1;
          port.write(v);
          if(v){document.querySelector("h2").className = "on";}
          else{document.querySelector("h2").className = "off";}
        },1000);
      });
  });
}, false);