1. KnightHome Sponsored by Leidos
Group 5
Jeffrey Benoit, C.E.
D’Voran McIntosh, C.E.
Roneal Valmonte, E.E.
Zack Zapasnik, C.E.

2. Motivation & Goals
Original motivation for project came from the idea to be able to control and monitor the usage of electricity in your home from anywhere
As we solidified our ideas, we also wanted to incorporate home automation, such as being able to schedule when your appliances would be powered on or off
The goal for this project is to give the user the means to control and monitor the usage of electricity of different appliances via an intuitive web/mobile application

3. Objectives Four major devices of project:
Smart Outlet
Wall Switch
HVAC Controller
Powerlock
Our objectives for this project are as follows:
Create products that are compact
Products should not draw a significant amount of energy
Simple and intuitive designs
Inexpensive components that do not require maintenance
Easy to install and use
Modularity

4. STM32 ARM Cortex M3 MCU 120 MHz 1MB Flash Memory
Micro-USB/Wifi - Debug/Program
Surface mountable
LED for status
80mA w/ 5V input
24 Total Pins

5. Broadcom BCM43362 Wi-Fi chip PO
Integrated ARM Cortex-M3 CPU
Single-band 2.4Ghz IEEE b/g/n
WPA2 Support

8. 2-Channel/1-Channel Relay
Powered via MCU Vin
Connects to MCU GPIO Pins
2 Channel for Wall Outlet/HVAC
1 Channel for Powerlock/Wall Switch

9. Non-Invasive Current Sensor
Measures power through live AC wire without interference
Requires a dropdown circuit in order to interact with MCU
Calculates RMS Current using I*V / number of loops in inductor
Dropdown Circuit
45kΩ Voltage Divider
75Ω Burden Resistor
10µF capacitor for noise

10. Temperature Sensor Low voltage temperature sensor
Produces voltage output proportional to Celsius temperature
Easily convert voltage to temperature using scale 10 mV/ °C
Accuracy of ± 1 °C

11. HVAC Controller Specs & Requirements
Feature
Value
Input Source
120V AC
Display
LCD Screen
Sensors
Temperature, Power
Replace existing HVAC Thermostat
Accurately detect temperature
Display temperature on LCD screen
Operate the HVAC System
Communicate wirelessly with the application

12. HVAC Controller Components
MCU
2-Channel Relay
3 Push Buttons
16x2 LCD Screen
Current Sensor
Temperature Sensor

13. HVAC Controller Block Diagram

16. Wall Switch Specs & Requirements
Feature
Value
Input Voltage
120 VAC
Input Frequency
60 Hz
Connection
Neutral Wire
Max Incandescent Load
60 W
Allow for an input of 120 VAC
Connect to existing neutral wire for use as a power supply
Turn the lighting source on or off
Interface wirelessly with the application

17. Wall Switch Components
MCU
Push Button
1-Channel Relay
Current Sensor

18. Wall Switch Block Diagram
Wifi Signal
MCU
Energy Meter IC
Relay
Output to Light

21. Wall Outlet Specs & Requirements
Feature
Value
Input Voltage
120 VAC
Input Current
15 A
Input Frequency
60 Hz
Connection
Type B Wall Outlet
Allow for an input of 120 VAC
Connect to a wall outlet to use as a power supply
Halt or allow the flow of electricity to any appliances connected
Communicate wirelessly with the application

22. Smart Outlet Components
MCU
2- Channel Relay
Current Sensor
2 Plug Outlet

23. Smart Outlet Block Diagram

26. Powerlock Specs & Requirements
Feature
Value
Input Voltage
12 VDC/5VDC
Max Current
2 A
Power supply mode
Linear
Electrike Strike Type
Fail-secure
Operate with DC power supply
Communicate wirelessly with the application
Unlock the strike when electric current is applied
Power Electric Strike and MCU with same power supply

27. Powerlock Components MCU 1 Channel Relay
Electric Strike w/ Fail secure
12V Battery Power Supply
LM7805 Linear Regulator

28. Powerlock Block Diagram / Basic Flowchart

31. Software Design Overview
Our infrastructure will run on the Internet within rented cloud servers
All connected devices in the home are controllable from anywhere in the world over the Internet
A cloud-hosted infrastructure gives certain advantages, like cheaper and easier installations (for clients), easier integration (with future devices), and easier upgrades
A lot of in-home solutions require a base station, which is more expensive than a cloud-hosted infrastructure automated devices connect to.
Many automated products don’t yet work over the Internet, which isn’t very convenient if you, for example, left a light on that’s wasting electricity or left a door unlocked that should have been locked.
Cloud hosted devices are much easier to install for non-technical users. Since there’s no base station they simply link with a mobile device to the cloud infrastructure.
Allows for easier integration with new future devices, since there’s no base station
Upgrades are also easier since the deployment is under our control. This is especially better if there’s any security vulnerabilities (which is becoming more common these days)

32. Software: App Design
Apps developed in AngularJS (a client-side MVC framework that assists with organizing user interfaces into modules)
PhoneGap used to build binaries compatible with both Android + iOS simultaneously
App Abilities:
Manage Account
Manage Devices
Group Devices into “Tasks”
Create Schedules for Tasks
Energy Management Tracking

33. Software: API Design Apps communicate with our JSON API over HTTPS
The API is designed to run on the NodeJS runtime using the ExpressJS web framework library
ExpressJS provides a routing API such that every route can be divided into its own route module
Every in-app route one-on-one matches its API route, making it easier and more organized to build and maintain the app

34. Software: Database
We are using MongoDB, a SQL-less database structure that organizes most relational data within documents rather than across tables
Each major in-app functionality has its own document data model that contains all the necessary data needed to perform the desired functionality

35. Microcontroller Software Design
Particle Build web IDE
C++
Procedural
TCP Socket connection
Shared main phase
Separate HVAC

36. Microcontroller Flowchart
Startup
Startup
Connect
Set
Register
Main Loop
Check
Read/Update
Measure
Send

37. Distribution of Work Microcontroller Programming - Jeffrey Benoit
Hardware - D’Voran McIntosh & Roneal Valmonte
Web/Mobile Application - Zachary Zapasnik

38. DEMO

39. Questions?