This document summarizes connecting electronic components to an Android device and controlling them from an app. It discusses the IOIO board, which provides digital and analog input/output to sensors and actuators. It can communicate over USB or Bluetooth to an Android phone or PC. The Accessory Development Kit (ADK) and Android Open Accessory (AOA) protocol allow an IOIO-based device to be recognized as a USB accessory from an Android app. Example code is provided to blink LEDs on an IOIO tree in response to light readings from a photoresistor. A demonstration of the setup is shown. BeagleBone and Thing++ boards are also mentioned as alternatives to connect electronics to Android.

1. Connecting electronic
to an Android
+LarsGregori
@choas
ello.co/choas
Viking9173 http://commons.wikimedia.org/wiki/File:Android_dance.svg

2. Agenda
IOIO Board
IOIO Tree + Code
"Cameron Highland Tea Plantation 2012" by Bjørn Christian Tørrissen
Own work by uploader http://bjornfree.com/galleries.html.
Licensed under Creative Commons Attribution-Share Alike 3.0 via Wikimedia Commons
http://commons.wikimedia.org/wiki/File:Cameron_Highland_Tea_Plantation_2012.JPG#mediaviewer/File:Cameron_Highland_Tea_Plantation_2012.JPG

3. pronounced “yo-yo“
https://github.com/ytai/ioio/wiki
+YtaiBenTsvi

5. Digital Input/Output
PWM
Analog Input
I2C, SPI, and UART

6. Host for Android and PC
USB or Bluetooth

7. Accessory Development Kit (ADK)
Android Open Accessory (AOA) protocol
http://developer.android.com/tools/adk/index.html
Android Debug Bridge (adb)
http://developer.android.com/tools/help/adb.html
"Ethernet Connection" by Someone's Moving Castle
Template:Revathi. Licensed under Creative Commons Attribution-Share Alike 3.0 via Wikimedia Commons
http://commons.wikimedia.org/wiki/File:Ethernet_Connection.jpg#mediaviewer/File:Ethernet_Connection.jpg

8. in/out in/out
Sensor Actuator
APP
ADK / adb

9. Agenda
IOIO Board
IOIO Tree + Code
"Cameron Highland Tea Plantation 2012" by Bjørn Christian Tørrissen
Own work by uploader http://bjornfree.com/galleries.html.
Licensed under Creative Commons Attribution-Share Alike 3.0 via Wikimedia Commons
http://commons.wikimedia.org/wiki/File:Cameron_Highland_Tea_Plantation_2012.JPG#mediaviewer/File:Cameron_Highland_Tea_Plantation_2012.JPG

10. IOIO Tree
LEDs
Photoresistor
IOIO Board
Android Phone

11. • <screenshot>

12. public class IOIOTreeLooper implements IOIOLooper {
@Override
public void setup(IOIO ioio) {
leds[0] = ioio.openDigitalOutput(10);
// …
leds[6] = ioio.openDigitalOutput(5);
photoresistor = ioio.openAnalogInput(44);
}
@Override
public void loop() {
…
https://www.flickr.com/photos/le-topographe/4510450751

13. @Override
public void loop() {
float voltage = photoresistor.getVoltage();
leds[i].write(false);
leds[i].write(true);
https://www.flickr.com/photos/le-topographe/4510450751

14. • demo
DEMONSTRATION

15. Thing++

16. BeagleBone
with Android
http://processors.wiki.ti.com/index.php/BeagleBone-Android-DevKit_Guide

17. Thank you
+LarsGregori
https://github.com/choas/android-IOIO-tree