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Basic Accessory Demo for Android

Developer's Description

This demo provides a simple example on how to interface from an Android device to an accessory using the Open Accessory framework added in v2.3.4+ and v3.1+ versions of the Android OS. The demo controls 8 LEDs on the board by touching the LED pictures on the screen, indicates the push button status of the board, and provides a percentage indication of the potentiometer. This demo also only shows how to use the host mode accessory implementation using the API10 android.hardware.usb library. This version works only for v3.1+ devices (API12+).

The firmware, documentation, and additional information are available at

Version 1.4

* Fixed issue where data from the Android device was sent twice to the Accessory (introduced in v1.3)

Version 1.3:

* Workaround issue where Read() call does not throw exception upon close. This allows the use of orientation changes, back button, and home button

* Requires new firmware to take advantage of these features. Firmware will be available in October at in the v2011-10 release.

Version 1.2:

* added Japanese, Korean, and Chinese Localization support.

* disabled LED buttons when accessory is not attached.

Version 1.0:

* Initial release supporting v3.1+ devices with android.hardware.usb library (API12)

* Supports host mode accessories only.

Full Specifications

What's new in version 1.5


Release October 1, 2020
Date Added October 1, 2020
Version 1.5

Operating Systems

Operating Systems Android
Additional Requirements Requires Android 3.1 and up


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