JavaScript for OCF ApplicationsSakari Poussa, Intel

@spoussa

1

Agenda

2

Vision

3

GW

Smart Devices

REST

REST

CoAP, MQTT, 6LowPAN, BLE

JavaScriptEngine(s)

Web Server API Server

Resource Networking

Storage

Cloud

JavaScript for Everything

Application developer can use only web technologies to create end-to-end solutions.

Not the only option but focus of this talk.

Web App

JavaScript…

4

Node.JS• JavaScript runtime for headless devices• V8 engine from Google• Chakra engine from Microsoft• Event loop (libuv)• Node package manager (NPM)• Node packages (www.npmjs.org)• Open source since 2008• Node Foundation (2015)

5

Why Node.JS for IoT• Young, with heritage• Experienced pool of developers• Thoroughly asynchronous, scales well• Wide adaptation, lots of packages including IoT specific• Perfect for REST APIs and extendable via modules (inc. native libs)• Tooling for REST API modeling languages (swagger, RAML, etc)• Full stack applications - JavaScript for both front and back end

6

Node.JS for IoT

7

Swagger or RAML can be used to define and document

the REST APIs

OS + Middleware + libs

Node.JS

Web App

Headless IoT Gateway reference architecture

REST APIs to services(HTTP + json/xml)

Cloud Services

Node.JS App for the business

logic.

Node.JS runtimeV8, event loop, OS integration

JS API for the Web Apps

npmjs.org modules (200K)

orproprietary

Cloud and device apps use services via REST

APIs

Node Modules

Node.JS APIModule API

APIJS

C/C++

The APISame OCF JavaScript API for everything

• Great API makes a difference• Iterative design process• Real usage• Web IDL specifications• Examples• The same OCF JS API

• Node.JS• Cordova and Crosswalk• Tizen• Soletta

8

OCF JS APIHighlights

9

Promise findResources();

Events:resourcefound

Promise<resource> register(data);

Events:retrieverequestupdaterequestobserverequest

Client Server

Promise retrieve();Promise update(data);Promise observe();

Events:update

Resource

OCF and IoTivity

• Specifications• Data models• Certification• Marketing• uPnP

• Open Source implementation• Apache 2.0• QA• API bindings

10

No JavaScript

• iotivity-node brings JavaScript API to IoTivity• Based on Node.JS and IoTivity• OCF JS API• Open source• Travis, sample code, demos• IoTivity 1.0.1• Used in IoTivity WSI, REST API Server, Smart Home demo

11

Iotivity-node• IoTivity CSDK features except security• Native NPM module• Works with Node.JS 0.10, 0.12, 4.x, 5.x• Linux, Ostro, OS X support• npm install iotivity-node

• Moving repository to iotivity.org !• Apache 2.0

12

Node.JS

iotivity-node

IoTivity

OS + Middleware + libs

Web App

OCF JS API

C API

APIJS

C/C++

OCF Discovery

13

Client Server

Request: DISCOVER

Response: URI, Type, ID

OCF Retrieve, Update

14

Client ServerRequest: RETRIEVE

Response: DATA

Request: UPDATE

Response: OK

Cloud

OCF and Cloud

REST API

CoAP over TCP

XMPP

15

Remote Access with REST APIs

16

Cloud

API SERVER

RESTOCF HTTP(S) and JSON

OCF Deviceson

Local Network

APIJS

C/C++

HTTP to CoAP

17

Resource/a/light

HTTP GET /oic/resRequest: DISCOVER

Response: URI, Type, ID HTTP 200 OK

HTTP GET /a/lightRequest: RETRIEVE (/a/light)

Response: DATAHTTP 200 OK

HTTP PUT /a/lightRequest UPDATE (/a/light)

Response: OKHTTP 200 OK

Discovery

Read

Update

API Server(REST) Cloud/MobileCoAP HTTP

REST API Server• OCF REST API compliant• All JavaScript• Node.js, Express, and

iotivity-node• Open source• Apache 2.0• Features

• DISCOVERY• RETRIEVE and UPDATE• OBSERVE

18

Node.JS

iotivity-node

IoTivity

OS + Middleware + libs

Express Web Server (npm)

JS API

C API

APIJS

C/C++

REST API Server

OCF REST API

Other npm modules

JavaScript on OstroDevelop with JavaScript

• Node.JS 4.2 and NPM• IoTivity• iotivity-node• OCF API• Express, mraa, MQTT and CoAP modules• Rest API Server

• with systemd socket activation and firewall rules• Soletta JS bindings

19

JavaScript on SolettaDevelop with JavaScript

• Soletta JS bindings are under development• APIs

• OCF JS API• HW IO (GPIO, I2C, UART, SPI, PWM)• Software Update• Platform

20

JavaScript on ZephyrDevelop with JavaScript

• Scale JS development down to MCU• Micro JavaScript runtime • JerryScript, Duktape, libtuv, IoT.JS and friends• JavaScript APIs

• Node.JS subset• OCF JS API• BLE, NFC, GPIO, I2C, UART, PWM

21

Cordova OCF Plugin

22

Cordova

OCF Plugin

IoTivity

Android

Web App

JS API

Java API

APIJS

C/C++

• HTML, CSS and JS Apps on Android• Crosswalk or WebView• OCF JS API• Open Source *• Available in Cordova registry *• npm i cordova-android-crosswalk

• npm i cordova-ocf-plugin

Java

* Available soon

Cordova OCF Sample App• Only HTML, CSS and JavaScript• Uses OCF Cordova Plugin• Android• Discover Resources• Read / Update Resources• Open Source *

23 * Available soon

Smart Home Demo• Iotivity-node, REST APIs• Cloud Integration• All Application code in

JavaScript• End-to-End OCF• Visit Intel Booth to see

24

Next• Node-Red• Zephyr• Soletta• Security

25

SummaryJavaScript for Everything

2626

OCF JS API

Questions?

27

28

References• https://gerrit.iotivity.org/gerrit/p/iotivity-node.git• https://github.com/solettaproject/soletta/blob/master/doc/js-spec/oic.md• https://github.com/01org/iot-rest-api-server• https://ostroproject.org/• https://www.zephyrproject.org/• https://github.com/01org/cordova-plugin-ocf

29