1page.title=Accessory Development Kit 2page.tags="adk" 3@jd:body 4 5<p>The Accessory Development Kit (ADK) is a reference implementation for hardware manufacturers and 6hobbyists to use as a starting point for building accessories for Android. Each ADK release is 7provided with source code and hardware specifications to make the process of developing your own 8accessories easier. Creating new and alternative hardware based on the ADK is encouraged!</p> 9 10<p>Android accessories can be audio docking stations, exercise machines, personal medical testing 11devices, weather stations, or any other external hardware device that adds to the functionality of 12Android.</p> 13 14<p>Accessories use the Android Open Accessory (AOA) protocol to communicate with Android 15devices, over a USB cable or through a Bluetooth connection. If you are building an accessory that 16uses USB, make sure you understand how to implement the AOA protocol to establish communication 17between your accessory hardware and Android. For more information, see the 18<a href="http://source.android.com/tech/accessories/index.html">Android Open Acessory protocol</a>. 19</p> 20 21<p>The following sections provide more information about the Android Accessory Development Kits, how 22to use them, and how to get started building your own accessories for Android.</p> 23 24<dl> 25 <dt><a href="adk2.html">ADK 2012 Guide</a></dt> 26 <dd>Guide to getting started with the ADK released at Google I/O 2012.</dd> 27 28 <dt><a href="adk.html">ADK 2011 Guide</a></dt> 29 <dd>Guide to getting started with the original ADK, released at Google I/O 2011.</dd> 30</dl> 31