1. Smart Knob
Designed by : Yuan Wang, Seungeun Lee, Soline Aubert 1

2. 01
Introduction

3. What is Smart Knob?
Today’s weather is rainy.
Don’t forget bring your umbrella:)
Smart Knob is a device which will provide you weather information everytime you touch it

4. Global Architecture

5. 02
End Point

6. Raspberry Pi: Composition

7. Raspberry Pi: Function
Sending the date and time to cloud
1)When user touches the sensor, Raspberry Pi recognizes it
2)Raspberry Pi sends the message which has the date and time information to cloud

8. Raspberry Pi: Function
Telling the weather
1)Raspberry Pi gets the weather message from cloud
2)RGB LED is turned on and change the color
3)Also, it give tips according to the weather conditions

9. Application Weather Condition Temperature Current Location Humidity
Wind Speed
Weather Condition
Humidity
Tips about today’s weather
We use a location third party API to locate your phone’s current location and according to longitude and latitude, we can get the weather information by openweathermap API.

10. Enable/Disable Deceive
Application
You can set up the time when you prefer to leave home every day, which let smart knob become your life assistant to help you have a regular life.
Leaving Time
You can set up the time when smart knob is on automatically every day. You can choose 1 hour, 2 hours, 3 hours or 4 hours earlier before your leaving time.
Turning on Time
If you feel vocal message is annoying sometimes, you can turn it off. Then you won’t get vocal tips anymore when you touch it again.
Disable Vocal Message
You can completely control smart knob device by application without any operation to the device itself.
Enable/Disable Deceive

11. Application Weekly Actual Leaving Time
In the chart page, it will show users’ weekly leaving time(touching smart knob time) and the comparison with ideal leaving time which users set on the phone.
Today’s leaving time is also shown in the screen.
Smart knob app will count the number of your late, and shows a relative alert about your terrible habits in the past week.

12. Application Web App LocalStorage Google Chart Materialize Shift menu
Side Navigation
Shift menu
Application
Based on HTML5. A web application or web app is a client–server computer program in which the client runs in a web browser. It is cross-platform and be used both in Android phone and ios phone.
Based on HTML5. With localStorage, web applications can store data locally within the user's browser.
Google Chart
Be used to implement the weekly actual leaving time chart.
Materialize
Modern responsive CSS framework based on Material Design by Google.
Web App
LocalStorage

13. 03
Cloud

14. Connectivity: with Raspberry Pi
Upstream (from RPi to AWS) : Raspberry Pi communicate over MQTT using JSON format. This allow to pass information to AWS and trigger actions on AWS side.
Downstream (from AWS to RPi) : AWS sends data to RPi over MQTT as well using AWS IoT topics.
Raspberry Pi is registered as a thing in AWS IoT which grant it access to topics and other AWS services.

15. Connectivity: with Application
Initial plan:
App uses RPC (Remote Procedure Call) over HTTP to AWS Lambda service.
This way our pool of lambda functions can be considered as a backend for our app as it allows to :
Get or update data from database
Pass data to Raspberry Pi

16. Cloud: Overview Dynamo DB Lambda IoT IAM CloudWatch
Store all data about the service
NoSQL, JSON format
Lambda
Core of the system
Interact with all services involved
Process data and actions
IoT
Manage RPi credentials
Communicative interface between RPi and Lambda
IAM
Manage credentials for third parties
Manage policies of access between AWS Services
CloudWatch
Set up scheduled event

17. Cloud: Dynamo DB SystemState timeData
Contains the state of the system for one user:
Settings entered by user through application
Latest temperature measured (by a call to OpenWeatherMap API)
Contains all the timestamps sent by RPi.
Those data are used to build the Chart View on the app and we also thought it could be used to do a smart service disable
Those data are mostly used by Lambda functions either to send the right action to RPi or to be processed and sent back to the app.
(automatically disabling the service if the sensor is pressed several times in a short time or when it’s not pressed for a very long time)

18. Cloud: Lambda Function Name Triggered by Interact with Goal
pullChartData
App (HTTP request)
Dynamo DB
Process timestamps in timeData to send back weekly schedules
handleSettingChanges
Update setting(s) value in database when a change is made by user
getWeatherInfoOnTouch
AWS IoT (when RPi publishes a timestamp)
Dynamo DB, OpenWeatherMap API, AWS IoT
Get weather information, simplify it to a single action and send it to RPi
getWeatherInfoOnTime
AWS CloudWatch (scheduled event)
handleServiceState
Dynamo DB, AWS IoT
Update the service state (enable or disable) and pass the new value to RPi

19. 04
Demo

20. Scenario 1: Standard Use
Elly

21. Scenario 1: Standard Use

22. Scenario 2: Changing to mute mode
Soline

23. Scenario 2: Changing to mute mode

24. Scenario 3: Turning off the service
Soline

25. Scenario 3: Turning off the service

26. Scenario 4: Confirming the chart
Jane

27. Scenario 4: Confirming the chart

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