Windows IoT Meeting Room Presence

This tutorial is for developing a simple system to "see the availability of a meeting room" based on

• Raspberry Pi B+
• Azure
• Office 365 - Calendar
• Oled Display SSD1306

Architecture

This project is composed by three "block"

• Raspberry Pi B+
• Azure API
• Office 365 -Calendar

I've used the library EWS to manage the availability of a room in Office 365.

http://blogs.msdn.com/b/exchangedev/archive/2014/06/02/ews-managed-api-2-2-now-available.aspx

Unfortunately, this library is unusable by Windows 10 IoT and we need to build a proxy for it.

I've built a proxy in Azure API because is the faster way. Another possible way is to use the xml request from the Windows10 IoT App but is slower to implement.

I've used the Oled display SSD1306 (128x32) because is cheaper then the "classical" touch screen of the Raspberry Pi

Office 365

You need to have an Office 365 Account "up and running". You need to have a "meeting room" configured.

Azure API

I've created this layer for manage the communication of the Raspberry with the Exchange Web Services.

Unfortunately it is impossible to use the "Microsoft Exchange Webservices" Package in a universal App.

This is the step for create an Azure API Layer

1. Create Visual Studio project from scratch
2. Add NuGet Package from EWS
3. Add the model
4. Add the logic
5. Add scaffolding element
6. Add Swagger Support 
7. Configure the correct username and password in webconfig

This is just a simple Azure API project. You should use it just for educational purposes because how simple this project is!

Creation of the project

from Visual Studio (2015) create a new Asp.net project (and select Azure API App)

Add NuGet Package from EWS

Add the reference to the NuGet package

https://www.nuget.org/packages/Microsoft.Exchange.WebServices 

Add the model

in model folder add this file

Add the logic

create a Project folder named EWS and copy this file inside the folder just created

Add scaffolding element

right click on Controller folder, Add, controller

use this file for the new controller created

Add Swagger Support

You can use this link for configure the swagger support for your Azure Api site

• https://azure.microsoft.com/it-it/documentation/articles/app-service-dotnet-create-api-app-visual-studio/
• http://www.nuget.org/packages/Swashbuckle

Configure your web config

add this key in your web config

  <appSettings> <add key="RAusername" value="EWSUsername"/> <add key="RApassword" value="EWSPassword"/> <add key="RoomName" value="Room Email"/> </appSettings>

Deploy on Azure

and test it

open the url of the Azure API and add /swagger

Windows IoT Application

1. Create new project
2. Wire your Raspberry correctly to the SSD 1306
   
3. Add the support for Azure API
   
4. Add nuget package for OLED ssd1306 
   
5. Write the code for handle the appointment

Creation of new Windows IoT project

Create new Windows Universal Platform Project and add the behavior for IoT

The project in github is made with caliburn micro. See the reference on official caliburn micro site 

Wire Raspberry and ssd1306

Wire your board using this schema

https://ms-iot.github.io/content/en-US/win10/samples/SPIDisplay.htm

Add nuget package

Add nuget package for handle ssd1306 device

https://www.nuget.org/packages/WindowsIot-SPiDisplay-SSD1306/

Write real code for handle your appointment

This is the main part of the IoT application

for download the full code from github

for my code (i've included Caliburn micro in the project in the github repo) you have to disable the flag "compile with .net native tool chain