Android Meets A BeagleBone In The IoT World

•

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This document discusses connecting Android to the BeagleBone Black for Internet of Things applications. It provides an overview of the Internet of Things and why the BeagleBone Black is suitable for connecting sensors and actuators. Details are given about the hardware specifications of the BeagleBone Black, including its processor, memory, ports and expansion headers. Code examples show how to control GPIO pins and read analog sensors from Android using Java and the ALLToolKit library. Finally, some example IoT application ideas are briefly described such as logging sensor data, displaying CPU usage, and reading from temperature and distance sensors.

Technology

ANDROID MEETS
A BEAGLEBONE
IN THE IoT WORLD
droidcon 2015
04.06.2015, Lars Gregori, hybris GmbH

Agenda
• Internet of Things
• Why BeagleBone?
• BeagleBone Black
• Code
• Ideas

Internet of
Things
• Internet
• Things
• physical
• Sensors
• Actuators

Why?
• Why Android?
• a window system
• APPs
• Java
• Why BeagleBone?
• connect other Hardware
• …

AM335x
1GHz ARM
Cortex-A8
• 512MB DDR3 RAM
• 4GB 8-bit eMMC 
on-board ﬂash storage
• 3D graphics accelerator

AM335x
1GHz ARM
Cortex-A8
• USB host
• USB client  
for power &
communications
• Ethernet
• HDMI (micro)
• SD Card
• Serial Debug (FTDI 3.3V)
• 2x 46 pin headers

Linux
root@android:/sys/class/gpio/gpio66
#
ll

-‐rw-‐r-‐-‐r-‐-‐
root

root

4096
2000-‐01-‐01
14:33
active_low

-‐rw-‐rw-‐rw-‐
root

root

4096
2000-‐01-‐01
14:33
direction

-‐rw-‐r-‐-‐r-‐-‐
root

root

4096
2000-‐01-‐01
14:33
edge

drwxr-‐xr-‐x
root

root

2000-‐01-‐01
14:33
power

lrwxrwxrwx
root

root

2000-‐01-‐01
14:33
subsystem
…

-‐rw-‐r-‐-‐r-‐-‐
root

root

4096
2000-‐01-‐01
14:33
uevent

-‐rw-‐rw-‐rw-‐
root

root

4096
2000-‐01-‐01
14:33
value

root@android:/sys/class/gpio/gpio66
#
cat
direction

out

root@android:/sys/class/gpio/gpio66
#
echo
1
>
value

Java
// digital OUT
GPIO gpio = new GPIO(PIN);
gpio.setDirection(GPIO.DIRECTION_OUT);
gpio.setValue(true);
gpio.close();
// analog IN
ADC adc5 = new ADC(ADC.AN5);
int value = adc5.getValue();
adc5.close();
ALLToolKit - Android Java Library for Hardware Management
http://sourceforge.net/projects/alltoolkit/

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Android Meets A BeagleBone In The IoT World

1. ANDROID MEETS A BEAGLEBONE IN THE IoT WORLD droidcon 2015 04.06.2015, Lars Gregori, hybris GmbH

2. Agenda • Internet of Things • Why BeagleBone? • BeagleBone Black • Code • Ideas

3. Agenda • Internet of Things • Why BeagleBone? • BeagleBone Black • Code • Ideas

4. Internet of Things • Internet • Things

5. Internet of Things • Internet • Things • physical • Sensors • Actuators

6. Temperature

7. Distance

8. LED

9. 7-Segment

10. Internet of Things REST  MQTT  Internet

11. OUTSensor Actuator APP IN

12. Agenda • Internet of Things • Why BeagleBone? • BeagleBone Black • Code • Ideas

13. Why? • Why Android? • Why BeagleBone?

14. Why? • Why Android? • a window system • APPs • Java • Why BeagleBone? • connect other Hardware • …

15.

16. Agenda • Internet of Things • Why BeagleBone? • BeagleBone Black • Code • Ideas

17. AM335x 1GHz ARM Cortex-A8 • 512MB DDR3 RAM • 4GB 8-bit eMMC  on-board ﬂash storage • 3D graphics accelerator

18. AM335x 1GHz ARM Cortex-A8 • USB host • USB client   for power & communications • Ethernet • HDMI (micro) • SD Card • Serial Debug (FTDI 3.3V) • 2x 46 pin headers

19.

20.

21.

22.

23.

24.

25.

26.

27.

28.

29. Android 4.4.4

30. Agenda • Internet of Things • Why BeagleBone? • BeagleBone Black • Code • Ideas

31. Linux root@android:/sys/class/gpio/gpio66 # ll -‐rw-‐r-‐-‐r-‐-‐ root root 4096 2000-‐01-‐01 14:33 active_low -‐rw-‐rw-‐rw-‐ root root 4096 2000-‐01-‐01 14:33 direction -‐rw-‐r-‐-‐r-‐-‐ root root 4096 2000-‐01-‐01 14:33 edge drwxr-‐xr-‐x root root 2000-‐01-‐01 14:33 power lrwxrwxrwx root root 2000-‐01-‐01 14:33 subsystem … -‐rw-‐r-‐-‐r-‐-‐ root root 4096 2000-‐01-‐01 14:33 uevent -‐rw-‐rw-‐rw-‐ root root 4096 2000-‐01-‐01 14:33 value root@android:/sys/class/gpio/gpio66 # cat direction out root@android:/sys/class/gpio/gpio66 # echo 1 > value

32. Java // digital OUT GPIO gpio = new GPIO(PIN); gpio.setDirection(GPIO.DIRECTION_OUT); gpio.setValue(true); gpio.close(); // analog IN ADC adc5 = new ADC(ADC.AN5); int value = adc5.getValue(); adc5.close(); ALLToolKit - Android Java Library for Hardware Management http://sourceforge.net/projects/alltoolkit/

33. Agenda • Internet of Things • Why BeagleBone? • BeagleBone Black • Code • Ideas

34. Ideas exception notiﬁcation

35. Ideas log messages

36. Ideas cpu display

37. Ideas temperature sensor

38. Ideas distance sensor

39. Thank you +LarsGregori @choas