1. Senior Design Group #5 (Summer 2012)
2012: A Home Odyssey
Senior Design Group #5 (Summer 2012)
Members:
Kyle D'arcangelis
John Edison
Heston Posner
Jimmy Wong

2. Overview Home Automation System
Wireless Communication between Subsystems
Android-based Application Control
Lighting, HVAC, Television

3. Project Goals and Objectives
Reduce energy consumption
Reduce cost
Ease of Use
Reliable
Compact
Integration of Google App Engine with user interface and hardware

4. Overall Project Block Diagram

5. Hardware Specifications and Requirements
TI MSP430G2553 Value Line MCU
TI CC1100 RF Transceiver
TI LM3S8962 ARM Cortex-M3 MCU
3.3V for all digital logic circuitry
925 MHz wireless communication for up to 100m
2 layer printed circuit boards

6. Microcontroller Comparison
Model
Memory
Language
Experience
Price
MSP 430G2553
16 kB Flash C
Yes
$1.00
ATmega 328p-pu
32 kB Flash
C++ No
$2.50
ATMEL ATmega 328P-PU
MSP430G2553

7. TI MSP 430 G2553 Compatibility Low Cost Low Energy Comsumption
Dual Inline Packaging (DIP)
PWM pins for IR Remote

8. Software Specifications and Requirements
Android OS 2.2 SDK
Google App Engine SDK
Touch Interface
High replication data storage

9. Lighting Subsystem MSP430G2553 Microcontroller TI CC1100 RF Module
DS1803DIL16 Digital Potentiometer
4x4 LED Clusters

10. Lighting Subsystem

11. Lighting Subsystem

12. Lighting Subsystem LED Cluster

13. HVAC Subsystem MSP430G2553 Microcontroller
TI TMP 100 Temperature Sensor
TI CC1100 RF Module
LED Indicators

14. HVAC Subsystem

15. HVAC Subsystem

16. Television Subsystem Infrared Remote Control Transmitter
Receives commands from the Stellaris base station
Tasks
Power on/off
Channel up/down
Volume up/down
Channel Selection

17. Television Subsystem Components
TI MSP430G2553
Communicates with the RF transceiver using I^2C
TI CC1100 RF Module
Receives commands over a 925 MHz signal.
Forwards commands to the Microcontroller.
IR LED
Transmits the infrared packets.

18. Hardware Block Diagram

19. Television IR Remote Sony SIRC protocol 38 kHz carrier wave
12 bit data stream
7 command bits & 5 address bits
Low Power mode until interrupt is received
Transmission Example:
SIRC
Start bit; carrier on for 2.4 ms
Logical "1" is a 1.2 ms burst of the 38 kHz carrier followed by a 0.6 ms idle
Logical "0" is a 0.6 ms burst of the 38 kHz carrier followed by a 0.6 ms idle

20. Television Subsystem Schematic

21. Design Approach Master/Slave topology for hardware
Client/Server architecture for software

22. Google App Engine vs MySQL instance
Non-relational database structure
Relational database structure
Inherently a distributed architecture (Data replication is automatically handled)
Must manually configure a distributed architecture
No join operations are available
Join operations are available
Automatically creates an instance of the database as an application is instantiated on the server
Must be hosted on a server for remote access

23. Why we chose Google App Engine
No need for relationships between tables
No join operations will be needed for the queries of our application
Simplicity of uploading new versions of the server application via an Eclipse plugin
Central administrator console
10 server applications allowed for a single Google account (Allows for plenty of testing)
Enough resources to allow for a fully operational application

24. Software Design: User and Admin Privileges

25. Software Design: Database Entities
<Insert John's class diagram here>

26. UI Design: Login Screen
Acts as the initial screen
of the application (through
AndroidManifest.xml)
MUST have a Google
account to use the
application

27. UI Design: Main Menu Utilizes the "simple_list_item1" menu layout
When a menu item is
selected, the corresponding
class, containing the .xml
layout load and the
functionalities, will run

28. UI Design: Input Provider Interface
Allows the user to view
the current provider and
enter in a new provider
Current provider textview
displays the company name
and the residential rates
To enter in a new provider,
the user would have to enter
the name and the rates

29. UI Design: Input Wattages Interface
Input wattages for specific
devices controlled by a
particular subsystem
Android Spinner objects
will be used to select
between different fixtures
(For Dimmer and HVAC)
Textfields used for wattage
input

30. UI Design: Current Wattages Interface
Textview used to display
the wattages of the
selected fixture
Spinners will be used to
select a specific fixture
It will always display the
TV wattage (Due to only
1 television set will be
controlled)

31. UI Design: Calculate Usage Interface
Allows the user to calculate
the monetary cost of
the electricity usage
according to a specific date
or month
Utilizes a DatePicker
object to choose thedate
Utilizes a Spinner object to
choose the month

32. UI Design: Dimmer Control Interface
Allows the user to control
the brightness level of
lighting fixtures in 3 rooms:
Living room, bedroom, and
the kitchen
Checkboxes used to select
lighting fixtures
SeekBar object used to
choose the brightness level
Button used to set light level

33. UI Design: HVAC Control Interface

34. UI Design: TV Control Interface