Home Appliance Control System
Design Specification: Phase 1
10/12/2006
Team 4:
Arjun Sambamoorthy
Anuradha Dhawan
Chandan Mahalingappa
Karthikkumar Annamalai
Praabhu Kannappan
TABLE OF CONTENTS
1. INTRODUCTION
1.1 Purpose
1.2 Scope
1.3 Assumption
1.4 Appliances and Functions
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2. USE CASE DIAGRAM
2.1 Introduction
2.2 HACS Use Case Diagram
2.3 Explanation of Use Case Diagram
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3. SEQUENCE DIAGRAM
3.1 Introduction
3.2 Sequence Diagram for Login
3.3 Sequence Diagram for Microwave
3.4 Sequence Diagram for Electric Stove
3.5 Sequence Diagram for TV/VCR
3.6 Sequence Diagram for Add/Remove Device
3.7 Sequence Diagram for Fire Alarm
3.8 Sequence Diagram for Home Security
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4. CRC CARDS
4.1 Introduction
4.2 CRC Card for Login
4.3 CRC Card for HACS
4.4 CRC Card for Microwave
4.5 CRC Card for TV/VCR
4.6 CRC Card for Home Security
4.7 CRC Card for Fire Alarm
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5. CLASS DIAGRAM
5.1 Introduction
5.2 Class Diagram for HACS
5.3 Class Diagram Description
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1. INTRODUCTION
1.1. Purpose
HACS is a system controlled by a remote system such as mobile phone or palmtop
and at the same time controls, monitors and co-ordinates home appliances
microwave, TV/VCR, Bath tub controller, home security, Air conditioner etc.The
document furnishes the detailed design with all the UML diagrams. It encompasses
CRC cards, Use Case Diagrams, Sequence Diagrams and Class Diagrams for home
appliance control system (HACS).
1.2. Scope
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The project focuses on five types of home appliances—Microwave, Electric
Stove, TV/VCR, Home Security System and Fire Alarm.
The user is allowed to add/remove device.
The system is composed of HACS controller and individual devices.
The central controller handles communication between appliances through
hardware interface and interaction with user interfaces.
The system allows multiple users to login at the same time.
1.3. Assumption
The HACS model is constrained by the following assumptions.
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This project will provide only a virtual simulation of the HACS system
The hardware interface handles proper communication between HACS controller
and the respective devices. The implementation of this hardware is beyond scope.
New devices can be added or existing devices can be removed with no hiccups.
There is a dedicated controller (link) for the HACS interface.
1.4. Appliances and functions
1.4.1. Microwave
The functions for microwave are,
 Turn on the device
 Turn off the device
 Setting the temperature
 Setting the timer
 Setting the clock
 Scheduling the timer
1.4.2. Electric stove
The functions for electric stove are,
 Setting the temperature
 Turn off the stove
 Turn on the stove
1.4.3. TV / VCR
The functions for TV/VCR are,
 Turn off the device
 Turn on the device
 Setting the Timer
1.4.4. Home security system
The functions for Home Security are,
 Notify the Police department in case of breakage
 Notify the User in case of breakage
 Monitor the hardware for signals
1.4.5. Fire alarm
The functions for Fire Alarm system are,
 Notify the fire department in case of fire
 Notify the user in case of fire
 Monitor the hardware for signals
2. USE CASE DIAGRAM
2.1. Introduction
Use case diagram shows a set of use cases and actors (a special kind of
class) and their relationships. You apply use case diagrams to illustrate the static
view of a system. Use case diagrams are especially important in organizing and
modeling the behaviors of a system.
2.2. HACS use case diagram:
Figure 1.1 shows an overall view of the HACS system.
add/remove devices
<<include>>
microwave options
<<include>>
Home Owner
TV,VCR options
<<include>>
<<include>>
Hard Ware
Fire Alarm Monitoring
<<include>>
login
<<include>>
<<include>>
Electric stove options
Home Security system
options
Fire Dept
police dept
Figure 1.1 HACS System Use case diagram
2.3. Explanation of use case diagrams
 Login:
The login will get the user name and the password for the HACS system.
 Add/remove devices:
After logging into the HACS system the user can add/remove any number
of devices.
 Microwave options:
The microwave options enable a user to set values to microwave, like set
the temperature to heat a food stuff etc.
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TV/VCR options:
The TV/VCR options enable a user to set values to the TV, like when the
television should be turned off.
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Electric Stove options:
The electric stove options enable a user to set values to the electric stove,
like what temperature should be maintained.
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Home Security options:
The home security options enable a user to either turn on or turn off the
home security device.
3. SEQUENCE DIAGRAM
3.1. Introduction
A sequence diagram is an interaction diagram that emphasizes the time ordering of
messages. A sequence diagram shows a set of roles and the messages sent and
received by the instances playing the roles. You use sequence diagrams to illustrate
the dynamic view of a system.
3.2. Sequence diagram for login
Figure 1.2 shows the sequence diagram for login
:Login
:HACS s/m
: Home Owner
1: enter usrname & passwd
2: send username & passwd
3: authenticate
4: Ack
5: access
Figure 1.2 Sequence diagram for login
Flow of events:
 The user should enter the user name and the password to log into the HACS
system.
 The user name and the password will be sent to the HACS system.
 The HACS system will authenticate whether the user is a valid user or not.
 Once the HACS system confirms that the user is a valid user it acknowledges the
user.
 Now the user can access the HACS system.
3.3. Sequence diagram for microwave
Figure 1.3 shows the sequence diagram for microwave
HACS s/m
Micro wave
: Home Owner
1: select microwave
2: check status
3: return status
4: display status
5: display options
6: select options : turn on/off/timer/clock/schedule
7: enter value turn on/off/timer/clock/schedule
8: set value
9: update
10: ack
11: display result
Figure 1.3 Sequence diagram for microwave
Flow of events:
 The user selects the microwave device.
 The HACS system will check the status of the appliance
 The Microwave responds back to the HACS system with the status.
 The HACS system will now display the status of the device
 The HACS system will display the menu options that the user can select.
 The user selects the option that he wants to change.
 The user then enters the value for the selected option.
 The HACS system will set the value to the microwave.
 The microwave will update the values set by the user
 The microwave acknowledges the HACS system after updating the values.
 The HACS system would display the result.
3.4. Sequence diagram for Electric Stove
Figure 1.4 shows the sequence diagram for electric stove
:HACS s/m
: Home Owner
:Electric
stove
1: select electric stove
2: check status
3: return status
4: Display status
5: Display options
6: select options : turn on/off/temperature
7: enter value turn on/off/temperature
8: set value
9: update value
10: ack
11: display result
Figure 1.4 Sequence diagram for electric stove
Flow of events:
 The user selects the electric stove device.
 The HACS system will check the status of the appliance
 The electric stove responds back to the HACS system with the status.
 The HACS system will now display the status of the device
 The HACS system will display the menu options that the user can select.
 The user selects the option that he wants to change.
 The user then enters the value for the selected option.
 The HACS system will set the value to the electric stove.
 The electric stove will update the values set by the user
 The electric stove acknowledges the HACS system after updating the
values.
 The HACS system would display the result.
3.5. Sequence diagram for TV/VCR
Figure 1.5 shows the sequence diagram for TV/VCR
:HACS s/m
:TV/VCR
: Home Owner
1: Select TV/VCR
2: Check status
3: Return Status
4: Display Status and menu
5: Select Turn on/off/timer
6: Set Values
7: Update
8: ACK
9: Display result
Figure 1.5 Sequence diagram for TV/VCR
Flow of events:
 The user selects the TV/VCR device.
 The HACS system will check the status of the appliance
 The electric stove responds back to the HACS system with the status.
 The HACS system will now display the status and menu options of the
device.
 The user selects the option that he wants to change.
 The HACS system will set the value to the electric stove.
 The electric stove will update the values set by the user
 The electric stove acknowledges the HACS system after updating the
values.
 The HACS system would display the result.
3.6. Sequence diagram for Add/Remove devices
Figure 1.5 shows the sequence diagram for Add/Remove devices
:HACS s/m
: Home Owner
1: request to add/remove device
2: checks possiblity
3: add/remove device
: Hard Ware
4: Notify hardware
5: Update
6: Return status
7: updates
8: change menu options
9: display result
Figure 1.6 Sequence diagram for Add/Remove devices
Flow of events:
 The user selects the Add/remove device option
 The HACS system will check the possibility to add/remove the device.
 The HACS system will now add/remove the device.
 The HACS system will notify the Hardware about the changes made.
 The hardware updates the addition or removal of the device.
 The hardware returns the status to the HACS system.
 The HACS system will update the changes made.
 The HACS system will change the menu options
 The HACS system will now display the result to the user.
3.7. Sequence diagram for fire alarm
Figure 1.6 shows the sequence diagram for fire alarm
:HACS s/m
: Fire Alarm
: Hard Ware
1: Monitor
: Fire Dept
2: Return Signal
: Home Owner
3: Notify Firedept
4: Notify HACS
5: Display warning
Figure 1.6 Sequence diagram for Add/Remove devices
Flow of events:
 The Fire alarm will ask the hardware to monitor for fire.
 The hardware returns a signal to the fire alarm in case of fire.
 The Fire alarm will notify the fire department.
 The fire alarm will notify the HACS system.
 The HACS system will display the warning message to the user.
3.8. Sequence diagram for home security system
Figure 1.6 shows the sequence diagram for fire alarm
:HACS s/m
: Home Owner
: Home
Security
1: select Home Security
2: Check Status
3: Return Status
4: Display status
5: Select turn on/off
6: Set Value
: Hard Ware
7: Update
: police dept
8: Monitor
9: Return Signal
10: Notify Police
11: Notify Warning
12: Display warning
Figure 1.7 Sequence diagram for Home Security system
Flow of events:
 The user selects the Home Security device.
 The HACS system will check the status of the appliance
 The electric stove responds back to the HACS system with the status.
 The HACS system will now display the status of the device
 The user then enters the value for the selected option.
 The HACS system will set the value to the electric stove.
 The home security will update the values set by the user
 If the set value is ‘on’ then the home security system will ask the hardware
to monitor.
 The hardware will return a signal to the home security in case of burglary.
 The home security system will notify the police.
 The home security system will notify the HACS system
 The HACS system will display the warning message to the user.
4. CRC CARDS
4.1. Introduction
The Class Responsibility Collaboration Cards gives the responsibilities of each and every
class that are included and their collaboration with the other classes that are available in
the system.
4.2. Login
Login
Responsibilities
Get the username and
password from the user
Send Username and
Password to system
Figure 1.8 CRC for login
Collaboration
HACS
4.3. HACS
HACS
Responsibilities
Collaboration
Authenticates
username/password
Helps the user to select the
appliance by displaying the
menu
Check the status
Display the Status
Helps the user to add/remove
device
Interacts with appliances
Appliance
Figure 1.9 CRC for HACS
4.4. Microwave
Microwave
Responsibilities
Interacts with HACS
Set the clock, schedule,
temperature and timer values
Start cooking at the
scheduled time
Inform the HACS when
temperature crosses
threshold value
Figure 1.10 CRC for Microwave
Collaboration
HACS
4.5. TV / VCR
TV/VCR
Responsibilities
Collaboration
HACS
Set the parameter for time
Return status to HACS
Interacts with HACS
Figure 1.11 CRC for TV/VCR
4.6. Home security system
Home Security System
Responsibilities
Return status to HACS
Interacts with HACS
Ask the hardware to monitor
for burglary
Receive signal from
Hardware
Notify police and user in case
of burglary
Figure 1.12 CRC for Home Security System
Collaboration
HACS
4.7. Fire alarm
Fire Alarm
Responsibilities
Interacts with HACS
Ask the hardware to monitor
for fire
Receive signal from the
hardware
Notify fire service and user on
fire
Figure 1.13 CRC for Microwave
Collaboration
HACS
5. CLASS DIAGRAM
5.1. Introduction
Class diagram shows a set of classes, interfaces, and collaborations and their
relationships. These diagrams are the most common diagram found in modeling objectoriented systems. Class diagrams address the static design view of a system. Class
diagrams that include active classes address the static process view of a system.
Component diagrams are variants of class diagrams.
5.2. Class Diagram for HACS
Figure 1.14 shows the class diagram for HACS
Figure 1.14 Class Diagram for HACS
5.3. Class Diagram description
Login
Figure 1.15 Class for Login
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The login class has attributes username and password
enter username() – Gets username from user
enter passwd() – Gets password from user
HACS S/m
Figure 1.15 Class for HACS s/m
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Has attributes Appliance Name, Username and password
displayMenu() – Displays the menu to the user on the PDA/Mobile
selectDevice() – The user is allowed to select a particular device he wants to
operate.
add/removeDevice() – User is allowed to add a new device or remove the existing
device.
authenticate() – this method authenticates username and password entered by
user.
createNewUser() – A user can signup to use the HACS system
changePasswd() – User is allowed to change the existing password.
Appliance
Figure 1.15 Class for Appliance
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Has attributes device name and status
turnOn() – This is an abstract method, implementation is done in the subclass.
turnoff() – This is an abstract method, implementation is done in the subclass.
checkStatus() – It will check the status of every appliance .
displayStatus() – Displays the status checked to the user.
Electric Stove:
Figure 1.15 Class for Electric Stove
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Has the attribute temperature.
setTemperature() – Sets the temperature for cooking
turnOn() – turns on the device.
turnoff() – turns off the device.
Microwave:
Figure 1.15 Class for Microwave
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Has the attributes timer, clock and temperature.
setTimer() – Sets the timer.
setClock() – Sets the clock for cooking.
setTemperature() – Sets the temperature for heating.
setSchedule() – schedules the time for cooking.
turnOn() – turns on the device.
TurnOff() – turns off the device.
TV/VCR:
Figure 1.15 Class for TV/VCR
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Has the attribute timer.
setTimer() – Sets the time for turning on or turning off TV/VCR.
turnOn() – turns on TV/VCR.
turnOff() – turns off TV/VCR.
Interface Inotify:
Figure 1.15 Interface Class for Inotify
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Has the attributes signal, deptName and deptPhoneNo.
Abstract methods specified here are,
1. notifyUser()
2. monitor()
3. notifyDepartment()
Home Security:
Figure 1.15 Class for Home Security
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notifyDepartment() – It notifies the police department in case of breakage.
monitor() – will request the hardware to monitor.
receiveSignal() – receives the signal for the hardware.
notifyUser() – notifies the user in case of breakage.
turnOn() – turns on the device.
turnOff() – turns off the device.
Fire Alarm:
Figure 1.15 Class for Fire Alarm
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monitor() – will request the hardware to monitor.
receiveSignal() – receives the signal for the hardware
notifyDepartment() – It notifies the police department in case of breakage.
notifyUser() – notifies the user in case of breakage.
turnOn() – turns on the device.
turnOff() – turns off the device.