The document summarizes physical computing with Android and the IOIO board. It introduces physical computing as building interactive physical systems using software and hardware to sense and respond to the physical world. It describes the IOIO board, which provides 48 input/output pins and allows Android apps to control electronics. Examples of projects built with the IOIO board are also mentioned, such as a robot and an autonomous RC car. Setup and getting started instructions for the IOIO board are provided.

1. Physical Computing with Android Arjan Scherpenisse MiracleThings http://miraclethings.nl/ 10 september 2011

2. Overview Physical computing

3. Android

4. The IOIO board

5. About me Mixed background Computer science (AI, UvA class of 2005)

6. Unstable Media Art (Rietveld, class of 2009) Have worked for Mediamatic for 3+ years

7. Now: independent software developer

8. Physical Computing Definition: “building interactive physical systems by the use of software and hardware that can sense and respond to the analog world.” (wikipedia)

9. Physical Computing (2) Sensor (input) Actuator (output) World Device

10. Physcomp = popular Many different platforms out there Arduino

11. Wiring

12. Fritzing

13. Phidgets

14. … Arduino makes it easy Plug&play, accessible software, many examples Need some electronics knowledge

15. hacking a knitting machine... http://miraclethings.nl/id/852

16. ...to knit the score board of a game

17. Playing ping-pong over the internet

18. ...using a DIY pingpong-ball canon

19. Physcomp roundup Lots of possibilities!

20. Mediamatic Atelier has sensors, motors, etc, etc, etc

21. Android Popular mobile phone OS by Google

22. Personal Android experience IkPod 2.0 app Nexus S-based RFID multimedia guide 1.0 2.0

23. Personal Android experience IkCam app mobile IkTag photo booth

24. Android ♥ physcomp Google's OpenAccessory protocol With reference implementation (ADK) IOIO board Released earlier than OA

25. 3rd-party board; needs USB debugging on

26. Might work with OA (beta; ymmv)

27. IOIO vs. OpenAccessory IOIO's pro's: Android >= 1.6 (vs. OpenAccessory >= 2.3.x)

28. Filesystem access to host board

29. More mature (apparently)

30. Simpler interface on android side OpenAccessory's pro's: Better performance (thruput/latency)

31. Does not require USB debugging hack

32. Allow apps to be notified on gadget connect

33. IOIO Provides 48 input/output pins

34. Software runs on your phone – not on the board

35. Many pins have extra functions

36. Needs external powering (Can charge the phone)

37. IOIO (2) Board needs DC adapter/battery between 5-15V on VIN or directly connected to stable 5V source

38. Pins only supply 3.3V output

39. Enable USB debugging on your phone

40. Made With IOIO “ soccer” playing robot http://www.youtube.com/watch?v=qY4b5sIrGKw LED wekker http://www.youtube.com/watch?v=8sAvXCfEj3s Autonomous RC car http://www.youtube.com/watch?v=-H6MtevUjBg Search “IOIO android” on Youtube

41. Digital Output Simple 3.3V digital output: Pin -> LED -> 220Ω -> GND 5V digital output: Needs 5V-tolerant pin!

42. Digital Input Input pins can be in 3 modes: Pull-up

43. Pull-down

44. Floating (need to pull up/down yourself, like Arduino) Only put 5V input on 5V-tolerant pins!

45. Advanced IOIO Analog inputs Like http://www.arduino.cc/en/Tutorial/AnalogInput UART Communicate w/ other devices (e.g. arduino!) over serial port PWM “ analog output”, e.g. LED brightness

46. Demonstrate IOIO example project Fixme.

47. IOIO Getting started http://www.sparkfun.com/tutorials/280 , or in a nutshell:

48. Install Android Development Environment

49. Download IOIOLib from https://github.com/ytai/ioio

50. Create new Android project w/ imported IOIOLib on build path

51. Write your app – or modify existing example

52. IOIO go go go Good Luck & Have Fun!