what emulator/device instances are connected to the adb server. You can generate a list of attached emulators/devices using the <code>devices</code> command: </p>

  <pre class="no-pretty-print">adb devices</pre>

<p>In response, adb prints this status information for each instance:</p>

<ul>
  <li>Serial number &mdash; A string created by adb to uniquely identify an emulator/device instance by its
    console port number. The format of the serial number is <code>&lt;type&gt;-&lt;consolePort&gt;</code>.
   