Web of Things TD extended with iotschema.org

Transcription

1 Web of Things TD extended with iotschema.org Darko Anicic, Michael Koster WoT F2F Meeting Burlingame, USA

2 Motivation: Thing Discovery TD Directory Problem Statement Discovery of Things suitable for a WoT application; Need AirConditioner Interop client can discover Things in order to dynamically adapt applications to changes, e.g., to replace malfunctioning sensor with an equivalent one;

3 Motivation: Thing Discovery TD Directory MyAirConditionerP1 TD Problem Statement Discovery of Things suitable for a WoT application; Need AirConditioner Interop client can discover Things in order to dynamically adapt applications to changes, e.g., to replace malfunctioning sensor with an equivalent one;

4 Motivation: Thing Discovery TD Directory AirConditioner TD Problem Statement Discovery of Things suitable for a WoT application; Need AirConditioner Interop client can discover Things in order to dynamically adapt applications to changes, e.g., to replace malfunctioning sensor with an equivalent one;

5

6 Air Conditioner Uniquely Identifiable

7 Interaction Patterns of AirConditioner Capability

8 Overview IOT SCHEMA

9 Narrow Waist in System Design App App App App Many Applications. Local and Remote Web of Things Internet of Things Semantic Interoperability (Software Adaptation) IP Networks LAN/WAN (WiFi, Thread) Common Infrastructure (Protocols, Formats, and Meta Models) Fairhair OCF dotdot Z-Wave Many Devices, Different Ecosystems

10 What needs to be built? Application level semantic interoperability Well known formats to describe common affordances of connected things (What does it do? What can I control?) A way to describe how to interact with connected things from different device ecosystems, which use similar protocols but diverse data models Enable easy implementation of Bridges, Libraries, Translators, Mappings, Bindings, Proxies

11 Layers in the Semantic Stack Diverse Applications Web of Things Semantic Narrow Waist Diverse Devices Internet of Things Protocol Narrow Waist Applications Semantic Vocab Abstract Semantics Concrete Protocols Device Ecosystems Protocols, Formats Transport Networks Interoperable Applications iotschema.org, ontologies W3C Thing Description, hypermedia controls OCF, Zigbee, Z-Wave, Fairhair IETF CoAP, CBOR, Link-Format UDP/TCP WiFi, IPV6, Bluetooth

12 Capability Abstraction Connected things expose simple "traits" and functional affordances like REST resources, common command sets A capability is an abstraction of something a connected thing can do, like measure temperature or switch on and off Capability descriptions can be layered and composed for instances of connected things

13 Examples of Capabilities Thing Capabilities Properties Type Actions Motion Sensor Temperature Motion Sensing Temperature Sensing Motion Boolean (read) Temperature Number (read) Light Switch SwitchState Boolean TurnOn TurnOff Light Level Control Level TransitionTime Number Number MoveToLevel MoveLevel StepLevel

14 Different Layers of iotschema.org Capabilities Interaction Patterns Data Types

15 Available Resources for iotschema Current schema location: A stable version should be moved to: GitHub repo: Working document and notes: opzvjtkfvvcnaxx3ofyutuereb3h2b5m/edit

16 Overview TD RECIPES

17 Motivation: Thing Discovery TD Directory AirConditioner TD TD Directory: Method: POST URI: /td-lookup/sem Payload:?td a < Need AirConditioner For users familiar with SPARQL and semantic models

18 Recipe How to easily create WoT applications based on application templates JSON-LD specification similar to Thing Description Interaction Patterns (Events, Properties, Actions) Discovery Interactions (Event A Action B) Script Generation

19 Recipe Example Motion Detector Light Switch Turn a light on when motion is detected in a room. Ingredients Interactions MotionStatus Property SUBSCRIBE MotionStatus TurnOn Action UPDATE TurnOn or TurnOff Action UPDATE TurnOff

20 Recipe Example Motion Detector Light Switch Turn a light on when motion is detected in a room. Ingredients Interactions MotionStatus Property SUBSCRIBE MotionStatus TurnOn Action UPDATE TurnOn or TurnOff Action UPDATE TurnOff Motion Sensor MotionStatus Prop. status yes Light Switch TurnOnAction no TurnOffAction

21 Recipe Example TD Interaction Patterns & iotschema.org Capability Motion Detector Light Switch Turn a light on when motion is detected in a room. Ingredients Interactions MotionStatus Property SUBSCRIBE MotionStatus TurnOn Action UPDATE TurnOn or TurnOff Action UPDATE TurnOff Implemented with W3C WoT Script API Motion Sensor MotionStatus Prop. status yes Light Switch TurnOnAction no TurnOffAction

22 Recipe Example TD Interaction Patterns & iotschema.org Capability Motion Detector Light Switch Turn a light on when motion is detected in a room. Ingredients Interactions MotionStatus Property SUBSCRIBE MotionStatus TurnOn Action UPDATE TurnOn or TurnOff Action UPDATE TurnOff Implemented with W3C WoT Script API Discovery & Binding Motion Sensor MotionStatus Prop. status yes Light Switch TurnOn Action no TurnOffAction

23 Recipe Example TD Interaction Patterns & iotschema.org Capability Motion Detector Light Switch Turn a light on when motion is detected in a room. Ingredients Interactions MotionStatus Property SUBSCRIBE MotionStatus TurnOn Action UPDATE TurnOn or TurnOff Action UPDATE TurnOff Implemented with W3C WoT Script API Discovery & Binding Motion Sensor MotionStatus Prop. status yes Light Switch TurnOnAction lighton no TurnOffAction lightoffaction

24 : "name" : "LightControlOnMotionDetection", "recipeid" : [" "comment": "The recipe for detecting the motion in a room and controls the lamp in a room.", "hasingredient" : [ {"@type" : "ThingIngredient", "thingingredient" : [ { "@type" : " " : {"@type" : " {"@type" : "ThingIngredient", "thingingredient" : [ { "@type": " "iot:capability" : ]}], {"@type" : " "t2tinteraction":[ {"@type" : "T2TInteraction", "t2tinteractswith":[ {"@type" : " "operation" : "Subscribe"}, {"@type" : " "operation" : "Update"}]}]} Example Recipe Interaction Patterns iotschema Capability Interactions

25 Tool: Recipe Workbench

26 Thank You! Questions please