Presentation I gave at GDG DevFest in Nantes about physical web, Web Bluetooth, mbed, embedded development and running the JerryScript VM on mbed devices.

1. IoT: from zero to hero
GDG DevFest Nantes
10 November 2016
for web developers

2. @janjongboom
Developer Evangelist
Internet of Things

3. Developers

4. From the internet of humans to
the internet of devices

8. Who is making decisions
when it comes to IoT?

9. NO

11. Real life example - Telenor
▪ Big telecom company
▪ Owns 4,000 buildings in Norway
▪ Toilet cleaning schedule made by 'hand'
Less people neededAutomatic planningRealtime insight

12. Real life example - Telenor
▪ Big telecom company
▪ Owns 4,000 buildings in Norway
▪ Toilet cleaning schedule made by 'hand'
Less people neededAutomatic planningRealtime insight

13. Internet of Things is
sensors + data intelligence

14. Three problems
How to build smart devices?
How to discover devices?
How to interact with devices?

15. Discovering devices

16. Physical Web
Walk up and use anything

18. BLE beacons
31 bytes per packet
1 packet per second
7 years on an AA battery

19. Eddystone protocol

20. Movie poster
http://cinema/3281

23. Retail $4, Chipset $2

24. Interactivity

25. BLE is more than beacons
Battery service Heartrate service
Percentage
Capacity
Current HR
Max. detectable HR

26. Flying service
Direction and height characteristics

27. nRF Connect

32. Programming devices

33. One year on AA battery 0.137 mA
220 mARaspberry Pi 3 (idle)

34. microcontrollers
Pain to program against (C, ASM)
Little code re-use
No code sharing

35. (since 2009)
mbed

36. Online IDE
Code sharing
Hardware Abstraction Layer

37. > 100 boards supported
~200 staff working on it
1.3 mio compiles / month

39. nRF51822
Nordic Semiconductors

41. Developing for mbed
C / C++ (not as scary as it sounds)
Large set of libraries
Solid Bluetooth stack

42. Announced 13 September

43. JavaScript on mbed
Based on Samsung's JerryScript
More overhead: 64K RAM, 512K Flash
Bindings available for BLE
https://github.com/ARMmbed/mbed-js-ble-example

44. One year on AA battery 0.137 mA
220 mARaspberry Pi 3 (idle)
0.020 mAmbed OS 5 beacon
Eddystone, 1s interval, lowest power mode

45. Let's build some demo's!

50. Get hacking!

51. Thank you!
http://janjongboom.com
@janjongboom

52. Links
• Juggling demo: https://github.com/web-bluetooth/juggling
• Lights demo: https://github.com/janjongboom/codefest-ru
• Google Eddystone lib: https://github.com/roywant/EddystoneBeacon
• JavaScript on mbed:
https://developer.mbed.org/blog/entry/Bringing-JavaScript-to-mbed-OS/
• JavaScript BLE app: https://github.com/ARMmbed/mbed-js-ble-example
• mbed Developer site: http://developer.mbed.org