ices. Device API is also intended be used by clients (Web App, Mobile App, Desktop App, etc.) to control connected devices.</p>
  <p>Device API is JSON-based, which means all request and response data is enclosed in JSON format. IoTgo currently supports 3 kind of request.</p>
  <ul>
    <li><strong>Register</strong>: Get <code>apikey</code> of current user who owns the device, only applies to indie device.</li>
    <li><strong>Update</strong>: Update device status to IoTgo</li>
    <li><strong>Query</strong