A Cell Phone-Based Remote Home
Control System
Adam Mohling – CprE
[email protected]
Issa Drame – EE
[email protected]
Arturo Palau – EE
[email protected]
Chau Nguyen – EE
[email protected]
Advisor: Ahmed E. Kamal, Professor
[email protected]
1
Client: ECpE Department
May0613 - A Cell Phone-Based
Remote Home Control System
Agenda
Problem statement
 System overview
 System components
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–
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2
Technology considerations
Device operations
Summary and conclusions
Questions
May0613 - A Cell Phone-Based
Remote Home Control System
Problem Statement
Design a system that allows users,
upon authentication, to remotely
control and monitor multiple home
appliances using a cell phonebased interface.
3
May0613 - A Cell Phone-Based
Remote Home Control System
Project in Action – Entire System
Controlled Devices…
Lamp
4
Fan
Thermostat
May0613 - A Cell Phone-Based
Remote Home Control System
Project in Action – Cellular Phone
Communication
Controlled Devices…
Lamp
5
Fan
Thermostat
May0613 - A Cell Phone-Based
Remote Home Control System
Cellular Phone Communication
Technologies Considered
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Tone Decoding (DTMF) Features
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Text Messaging (SMS) Features
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High Compatibility with all cell phone models
Limited user interaction
More prone to user error (uneditable)
Inefficient, time consuming
Additional hardware required (convert sound to binary)
Data transmitted in binary form (ASCII)
Message can be edited prior to sending
May0613 - A Cell Phone-Based
Remote Home Control System
Cellular Phone Communication
Technology Selected: Text Messaging
Reasons for Selection:
 Allows user to verify and edit the message before
sending to ensure the command issued is the
command requested
 Data is transmitted in binary, requires less hardware
to manipulate (as opposed to DTMF)
 Most commonly used in M2M technology
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May0613 - A Cell Phone-Based
Remote Home Control System
Cellular Phone Communication
Text Message Implementation

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Users will be provided with a list of pre-defined
commands that can be stored into the cellular phone
Users will then have to enter or issue the commands
from the cellular phone defined by the command list
Example – “command : PASSWORD”
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May0613 - A Cell Phone-Based
Remote Home Control System
Project in Action – Cellular Module
Text
Messages
9
Controlled Devices…
Lamp
Fan
Thermostat
May0613 - A Cell Phone-Based
Remote Home Control System
Cellular Modules
Model
EE54
Edge
GM47
GM28
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Type
Connection
type
Programming
Additional features
GSM /
GPRS
USB 2.0 Low
insertion force
system
connector
AT commands
(GSM07.07
and 07.05)
TCP/IP protocol
stack. PPP protocol
GSM /
GPRS
60 pin boardon-board
including RS232
for AT + 2
general purpose
Serial interfaces
AT
+proprietary
commands
AT access to TCP/IP
stack UDP
Control via AT
commands
AT access to TCP/IP
stack UDP UCS2 16
bit data supported
GSM /
GPRS
RS232 DB-9
connection
Kit
SIM
Required
1.8/3V on
board SIM
card reader
Required
3/5V SIM
reader with
SIM
detection
Not
Required
3/5V SIM
reader with
SIM
detection
May0613 - A Cell Phone-Based
Remote Home Control System
Cellular Modules
Module Selected: GM28
Reasons for Selection:
 RS232 DB9 connector
 No kit necessary for interface
 Located coding examples
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May0613 - A Cell Phone-Based
Remote Home Control System
Project in Action - Microcontroller
Lamp
Text
Messages
12
Controlled Devices…
GM28
Fan
Thermostat
May0613 - A Cell Phone-Based
Remote Home Control System
Microcontrollers
Starter Kit
STK200 Starter Kit
STK300 Starter Kit
Freescale Starter Kit
MC68HC11E9
8051 Starter Kit Philips
XA/RD/66x
Microcontroller
AT90S8515**(8K bytes
Flash)
ATmega128**(128KB Flash;
4KB EEPROM; 4KB SRAM)
MC68HC11E9 (12KB
Flash/EPROM; 512B RAM;
512B EEPROM)
XA-G49 (64KB Flash; 2KB
RAM)
Cable/Connection
ISP and RS232
ISP and RS232; opt. USB
PC COM port
RS232
Power Consumption
9-15VDC or 7-12VAC
9-15VDC or 7-12VAC
7-18VDC
9-15V AC or DC
I/O
64-pins
66-pins
38 pins
32 pins
Sockets for various
microcontrollers
Vcc and Ground for powering
external circuitry
3"x1.5" Solderless
Breadboard
40-pin DIP
Vcc and Ground for
external circuitry
Include daughter board
32Kbytes external RAM
44-pin PLCC sockets
Brownout (2.9V or 4.5V
level)
Brownout (2.9V or 4.5V level)
Buffalo Monitor utility for
debug and test program
switches and 10-way Bar
LED
Application Builder
STK300 Application Builder
AXIDE
Application Builder
AVR Studio 3 and 4
AVR ISP (C-complier)
free Assembler, C compiler
C-compiler Demos
AVREdit and AVRGCC
AVR and IAR Studio
Highlights
Software
Price
13
$66
WINISP and Flash Magic
Programming Tools
$85
$99
$94.80
May0613 - A Cell Phone-Based
Remote Home Control System
Microcontroller
Microcontroller Selected: STK300 Starter Kit
Reasons for Selection:
 Allows large-scaled projects (ATmega128)
 Interchangeable microcontroller design
 Sufficient number of I/O pins
 Vcc and Gnd pins can power external circuitry
 Application Builder, AVR Studio, and programmable
in C Language
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May0613 - A Cell Phone-Based
Remote Home Control System
Programming Languages Considered
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All the software developed for this project will be loaded into the
memory of the STK300 microcontroller.
The language must be supported by the STK300’s compiler
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The STK300 compiler supports C and Assembly
Java and C++ considered because code can be converted to C
Assembly
C++
C
Java
May0613 - A Cell Phone-Based
Remote Home Control System
Development Languages
Development Language Considered
Assembly Language Features:
 Low level language (greater device control)
 Less memory required
 Not many development resources/libraries available
 Team out of practice in Assembly language
programming
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May0613 - A Cell Phone-Based
Remote Home Control System
Development Languages
Development Language Considered
JAVA Language Features:
 Many GSM programming resources available
 Object oriented language (modular coding)
 Large memory requirement
 Poor response time
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May0613 - A Cell Phone-Based
Remote Home Control System
Development Languages
Development Language Considered
C++ Language Features:
 All team members have knowledge of C++
 Object oriented language (modular coding)
 Not many development resources / libraries
available
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May0613 - A Cell Phone-Based
Remote Home Control System
Development Languages
Development Language Considered
C Language Features:
 Universally reliable language
 Many programming resources available
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Serial port libraries
GSM libraries
Example code and project resources online
Team will need to identify differences between C and
C++
May0613 - A Cell Phone-Based
Remote Home Control System
Development Languages
Development Language Selected: C
Programming Language
Reasons for Selection:
 Vast amount of online resources
 Ease of development
 Team members have experience coding C
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May0613 - A Cell Phone-Based
Remote Home Control System
Software Development Environment
The code for this project will be developed in a
more user friendly environment than AVR
Studio (provided with the STK300)
Possible Solutions:
 Eclipse v3.1
 MS Visual Studio .NET 2003
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May0613 - A Cell Phone-Based
Remote Home Control System
Software Development Environment

Eclipse v3.1
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Free, but requires some setup for team
MS Visual Studio .NET 2003
–
Free through MSDNAA (available to all ECE)
Both are similar in their advantages. Since the
.c files will be copied into the STK300’s
compiler, decision was made to go with
Visual Studio .NET
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May0613 - A Cell Phone-Based
Remote Home Control System
Project in Action – Controlled Devices
Lamp
STK300
Text
Messages
23
Controlled Devices…
GM28
Fan
Thermostat
May0613 - A Cell Phone-Based
Remote Home Control System
Controlled Devices
The following devices will be controlled by the
microcontroller:
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Fan
Light
Digital thermostat
May0613 - A Cell Phone-Based
Remote Home Control System
Controlled Devices - Fan
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May0613 - A Cell Phone-Based
Remote Home Control System
Controlled Devices - Light
STK300
port B, bit 0
STK300
port B bit 1
Control
relay
Manual/Remote
select
Power from
120VAC
outlet
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Light Switch
May0613 - A Cell Phone-Based
Remote Home Control System
Controlled Device Status Detection
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May0613 - A Cell Phone-Based
Remote Home Control System
Controlled Device - Digital
Thermostat
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May0613 - A Cell Phone-Based
Remote Home Control System
Summary
Experiences
Technical Experiences:
– GSM modules
– Microcontroller
– Control circuits synthesis
Personal Experiences:
– Time management
– Communication
– Accountability
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May0613 - A Cell Phone-Based
Remote Home Control System
Conclusions
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Lessons Learned
Functioning in a team environment
Should follow assignment criteria closely
Amount of detailed documents goes in a
professional project
May0613 - A Cell Phone-Based
Remote Home Control System
Acknowledgements
Special thanks to Sony Ericsson for providing
the team’s GM28 cellular module
Special thanks to Prof Kamal for his continued
support to the team
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May0613 - A Cell Phone-Based
Remote Home Control System
Questions?
Lamp
GM28
STK300
Text
Messages
32
Controlled Devices…
Any device with an
electrical interface
Fan
Thermostat
May0613 - A Cell Phone-Based
Remote Home Control System
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A Cell Phone-Based Remote Home Control System