Lost in Abstraction

Why should a user buy an expensive IoT-Solution? Because it provides convenience. But to unleash the full potential, the user needs freedom to access all functions of a connected thing to support his special use case. Sadly, this often get lost in abstractions to support only the common features of a device class. In this talk I’ll show some examples of how to model things and how Eclipse SmartHome can help you to get the best experience for developing and using your IoT solution.

Transcript

1. Lost in Abstraction Sebastian Janzen
2. Sebastian @sebbe128
3. innoQ https://www.innoq.com
4. What is a 
 Smart Home?
6. Smart Home is NOT a connected device is NOT a cloud service is NOT a single product
7. “A dwelling incorporating a communications network that connects the key electrical appliances and services, and allows them to be remotely controlled, monitored or accessed.” 2003 UK Department of Trade and Industry - http://goo.gl/7PW8Gv
8. It’s a system of things which support the occupants use cases.
9. Smart Home participants User Device Software Interaction Interaction Access
10. The user’s expectations Flexibility: Cover custom use cases Extensibility: Installation extension Sustainability: Long term benefit Avoid vendor lock-in: Should be extensible
11. Passive 
 User Ambitioned 
 User Expert U U+ U++
12. U U+ U++ UI Device + Best setup — Extensibility — Flexibility
13. U U+ U++ UI Device Cloud + Modifications to final product — Privacy — Offline
14. U U+ U++ UI UI UI Eclipse 
 SmartHome Device Device Device Service UI
15. Eclipse 
 SmartHome
 (ESH)
16. Eclipse SmartHome > An open source Internet of Things framework > Java OSGi based Project > Eclipse Public License > Since 2014 > Base of openHAB > Requirements: Java >= 6 > Base of successful commercial Projects
17. What you get > Structure to handle IoT devices > Web-Interfaces, Apps, Examples > More than 100 already supported things > Documentation > Commercial support available > Large and active community
18. What you do not get > Hardware > A Java license
19. OS JVM OSGi Container Eclipse SmartHome (ESH) openHAB Solution X Solution Y
20. How to use this?
21. Representation Binding Thing Channel Channel Channel Bridge Thing Item Link UI
22. Representation Binding Thing Channel Channel Channel Bridge Thing Item Link Hue Lamp Color Temp. Brightness Color Hue Bridge ColorItem Status: ONLINE State: #FF0000
23. Representation Binding Thing Channel Channel Channel Bridge Thing Item Link UI Item GroupItem Link
24. Binding Thing Channel Channel Channel Bridge Thing Thing Id, Name, Description, Bridge, Configuration, Channels
25. Binding Thing Channel Channel Channel Bridge Thing Id, Description, … Configuration Channel
26. Thing Channel Channel Channel Bridge Thing Representation Item Type, Name, Label, Icon, Tags, … Item
27. Representation Binding Thing Channel Channel Channel Bridge Thing Item Link
28. Bundle Thing Channel Channel Channel Bridge Thing
29. Eclipse SmartHome Bundle Thing Channel Channel Channel Bridge Thing Bundle Thing Channel Channel Channel Bridge Thing Bundle Thing Channel Channel Channel Bridge Thing Bundle Thing Channel Channel Channel Bridge Thing Bundle Thing Channel Channel Channel Bridge Thing Bundle Thing Channel Channel Channel Bridge Thing
30. Eclipse SmartHome Bundle Thing Channel Channel Channel Bridge Thing Bundle Thing Channel Channel Channel Bridge Thing Bundle Thing Channel Channel Channel Bridge Thing Bundle Thing Channel Channel Channel Bridge Thing Bundle Thing Channel Channel Channel Bridge Thing Bundle Thing Channel Channel Channel Bridge Thing UI UI
31. Eclipse SmartHome Binding Binding Binding Binding UI UI Persistence Rules REST Discovery … UIs
32. Eclipse SmartHome Core Items Bindings Eclipse SmartHome Event Bus PubSub PubSub Rules PubSub Persistence PubSub Logging PubSub
33. How to program this?
34. Bridge Thing /ESH-INF/thing/bridge.xml
35. Thing /ESH-INF/thing/LCT001.xml
36. Channel /ESH-INF/thing/channels.xml
37. Core ItemTypes > Color > Contact > DateTime > Dimmer > Group > Location > Number > Player > Rollershutter > String > Switch
38. What does Lost in Abstraction mean?
39. Use case:
 Wash again, if washing finished and the door has not been opened after 16h.
40. Hardware UI State Washing Program Extra Parameters Power Water Amount Temperature Spin Extra H2O Door contact Time running Washing Machine Convenient ✓
41. Hardware UI State Washing Program Extra Parameters P o w e r W a Washing Machine Power Water Amount Temperature Spin Extra H2O Door contact Time running Gateway Loss
42. Hardware UI State Washing Program Extra Parameters P o w e r W a Washing Machine API Power Water Amount Temperature Spin Extra H2O Door contact Time running Power Water Amount Temperature Spin Extra H2O Door contact Time running
43. Power Water Amount Temperature Spin Extra H2O Door contact Time running My Washing Machine Own Solution Loss
44. Power Water Amount Temperature Spin Extra H2O Door contact Time running Thing Model SwitchItem NumberItem NumberItem NumberItem SwitchItem ContactItem NumberItem Items Own solutio X Y Setup Power Plug: Consumption NumberItem Use Cases
45. Use case: Wash again on wmPower changed to OFF timer = startTimer({ wmPower.state = ON }, now + 16h) end on wmDoor changed to OPEN if timer then timer.cancel() end
46. Eclipse SmartHome Benefits > Good framework to implement IoT device lifecycle > Easy to understand > Parallel development: UI + Binding > UI Testing without devices > Offline, “Intranet of Things”
47. Thank you! Questions?