WoT.js - WoT App. Framework for Open Source Hardware
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The document discusses the wot.js framework, aimed at facilitating the development of Web of Things (WoT) applications for open source hardware. It outlines the framework's architecture, use cases, and components such as sensor APIs and middleware, emphasizing a JavaScript-based approach for ease of use. Additionally, it touches on standards, a licensing model, and community management for distribution and support.
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Pros: Standards
WoT Transfer Protocol
wottp://[{gateway}]/{sensor network}[:{bus id}]/{address}/{sensor model}/{sensor id}
• Example
wottp:///w1/28-00000xxxxxx/ds18b20/28-00000xxxxxx
wottp:///gpio/22/singleled/r222
WoT Data Modeling
Example
{
status: 'ok',
id: 'dht22-xxxxxx',
result: {
temperature: 26.9,
humidity: 51.5 } ,
time: 1377605409847 // optional
}](https://image.slidesharecdn.com/201501-wac01-wotjs-r2-150123001416-conversion-gate02/85/WoT-js-WoT-App-Framework-for-Open-Source-Hardware-13-320.jpg)
WoT.js - WoT App. Framework for Open Source Hardware
- 1. WoT.js WoT App. Framework for Open Source Hardware ETRI Protocol Engineering Center Jonathan Jeon (hollobit@etri.re.kr)
- 2. 2 Open Source Hardware & DIY IoT
- 3. 3 Open Source Hardware & DIY IoT
- 4. 4 Q1: Web Technology for Small Connected Things ? Half of connected devices will be small IoT devices (how we can bring those devices into the web ecosystem) We need to consider these small devices
- 5. 5 Q2: How to make Simple WoT Architecture Web Resources RESTful Small device Small device What kind of request ? What kind of response ? Do we need to use HTML/CSS markup ? which kind of web client do we need ? Web Connectivity Control purpose (for automatize interaction) Client/Server Client/Server
- 6. 6 WoT Application Framework for Open Source Hardware Start Target : Open Source Hardware Goal : JavaScript based Simple WoT App Framework
- 7. 7 Open Source HardwareWoT Sensor/Actuator/Thing WoT Application Ethernet WiFi USB WoT Application Framework Javascript based framework Device management Application lifecycle management Integrated Cloud service On device web portal server HTML5 based application AngularJS based powerful web application Read & Write sensor device Web Application Temperature Humidity Light Switch etc Sensors Sensor Gateway + Web Application Conceptual Model WoT.js (= WoT Application Framework) 1-Wire GPIO UART I2C BLE
- 8. 8 Frameworks WoT.js = node.js : commonJS engine + express.js : Web server + sensor.js : sensor driver framework + angular.js : Web app framework
- 9. 9 Use Cases & Architecture Model UA Device Sensors Device Device Device Server Web Resources R2 R1 R3 R4 R5 R6 WoT.js R7 UA: User Agent R1~R6: Requirements Int-1~Int-5: Interfaces WOTR-1 WOTR-2 WOTR-3 WOTR-4 WOTR-5Event Trigger R8 Cloud
- 10. 10 Use Cases & Scenarios UA, Device UA, Device, Sensor UA, Device, Servers(…) UA, Device, Sensor, Servers(…) UA, Device, Sensor, Servers(…), Things Event, Device …. Event, Device …. User(UA) Sensor, Device, … User(UA) Things, Device, … User(UA) Servers(…), Device, … User(UA)
- 11. 11 Architectural Components Node.js based: support multiplatform and HW Sensor API: Easy sensing and accessing sensor H/W Middleware: support development of web application Node Package Modules Sensor APIs Sensor drivers dht11 gps Infrared Actuator drivers LED power on/off Actuator APIsMiddleware WoT Application Framework WoT Applications Sensor Data Transfer Protocol (REST, MQTT, etc.) Wireless Sensor Network (Bluetooth, Zigbee, etc.) WoT.js
- 12. 12 Pros. : Easy Any JS developer can be develop the WoT Application easily
- 13. 13 Pros: Standards WoT Transfer Protocol wottp://[{gateway}]/{sensor network}[:{bus id}]/{address}/{sensor model}/{sensor id} • Example wottp:///w1/28-00000xxxxxx/ds18b20/28-00000xxxxxx wottp:///gpio/22/singleled/r222 WoT Data Modeling Example { status: 'ok', id: 'dht22-xxxxxx', result: { temperature: 26.9, humidity: 51.5 } , time: 1377605409847 // optional }
- 14. 14 Open Source Plan License Model MIT License (or extension) WoT.js web page Source/Community Management Github Distribution / Installation Using NPM install via NPMJS Governance model Open
- 15. Demo
- 16. 16 Web of Things Demo Scenario BBB BBB BBB WoT.js Default IoT Cloud Gateway LCD Temperature Humidity Ambient LightLED Temperature Ambient Light Door Open IP Camera Switching hub Power WiFi Dongle BLE Dongle BBB WoT.js Temp. Humi. WiFi Dongle Power Manager BLE Sensor Web of Things WoT Web App ETRI Panel Table