tezure

TEZURE 

Cost effective IOT apps using Javascript, Tessel & Azure

Internet Of Things (IOT)

The Internet of Things (IoT) is the interconnection of uniquely identifiable embedded computing devices within the existing Internet infrastructure.

Every Industry is getting Smarter:

• Smart Logistics
  
• Smart Home
  
• Smart Industries
  
• Smart Healthcare
  
• Smart Entertainment
  

With number of internet connected devices is exploding, there is a need for enabling and controlling services remotely.

Why IOT

• Enabling services remotely
• More targeted services
• Data driven insights
• Cost efficient

Tezure - SpyCam

• Mobile controlled Surveillance Camera

Complexities

• Design & Build
  • C, C++ for Sensors/Devices
  • C#, JAVA for cloud services
  • C#, Java, Obj C for Mobile devices

• Connectivity (IP & Non IP devices)
• Security - Identity and Authorization
• Scalability

Keep it simple

• Cost efficient

• End to End solutions using pure Javascript

  • Tessel based devices/sensors
  • X platform mobile apps using Cordova/PhoneGap

• REST based access to Azure Service bus/Azure Blobs

Hello Tessel!

• Tessel is a microcontroller that runs JavaScript.
• It's Node-compatible and ships with Wifi built in.
• Its easier than ever make physical devices that connect to the web.
• Bridges the gap between Embedded devices and Web development

What Azure Offers

• Azure Service bus
  • Queues, Topics, relays for messaging
  • Mobile services for push notifications and data tables

• Azure store blobs
  • Images and Video storage

• SAS (Shared Access Token) based authentication via REST
• Supports Async access using NodeJS/Javascript

What PhoneGap Offers

• PhoneGap is a free and open source framework that allows you to create X-Plat mobile apps using Web technologies
• Mobile Apps can be created using HTML, Javascript and CSS
• PhoneGap Build takes the pain out of compiling PhoneGap apps. Get app-store ready apps without the headache of maintaining native SDKs.

Tezure SpyCam - Architecture

Tessel

• Tessel setup consists of Tessel Microcontroller and Camera module 
  
•  Nodejs packages can be installed inside the tessel devices 
  
•  Current set up consists of tesselPollingService() function which continously checks for new message on Azure queue 
  
•  On new message, Camera module takes a picture and uploads to Azure blob storage 
•   'Tesselate' NPM module is used to load the Camera Module functions 
•   'Async' NPM module is used to process the Polling cycles asynchronously  

Source Code  

Azure service bus

• Azure queue receives messages from the Mobile applications and authenticated via SAS token
• Azure Blob storage receives Images from tessel devices and authenticated via SAS
• CORS rules can be added to Azure storage to enable X-domain requests

PhoneGap App

• Sends a surveillance request message with Device ID and time stamp
• Polls the Azure Storage to retreive image with DeviceID and time stamp
• Built with end to end javascript

Source Code

PreRequisites

• Tessel Board + camera module ($125) Tessel Shop
• Wifi connectivity
• Azure Subscription
  • Service bus Queues - $10/mo (12.5 Million Ops) Service Bus Pricing
  • Blob storage - $0.024 per GB Storage Pricing

• Mobile Device

Few Gotcha's

• SAS token for Service bus queue is generated using Red Dog Tools
• SAS token for Azure storage is generated using Service Bus Explorer
• Enable CORS rules for Storage using Synapta CORS helper