The main idea behind this proposal is to provide an ease off access to the user by providing full control over his/her entire home. Due to modern city life we never find time to check any of our electric appliances, switches, thermostats, air conditioners and so on, whether they are regularly switched off when not in use. This results in Energy wastage, security risk, and eventually leads to stress. In our method we suggest an ease off method by using an Android phone with minimal power specifications

ET, Santosh

R, Satish Kumar

V, Vidhya

English

Gyandhara International Academic Publication (GIAP): Journals

International Journal of Student Research in Technology & Management 
Vol 1(1), pg 12-17 
 
www.giapjournals.com Page 12 
 
ANDROID-ARM BASED SWITCH CONTROL USING SMART PHONE
 
1Santosh ET, 2Vidhya V, 3Satish Kumar R 
Department of Electronics & Telecommunication Engineering 
Rajiv Gandhi College of Engineering, Chennai, India 
1etsant.18@gmail.com, 2vidhu2992@gmail.com, 3satzkumr7@yahoo.com 
 
Abstract 
The main idea behind this proposal is to provide an ease off access to the user by providing full 
control over his/her entire home. Due to modern city life we never find time to check any of our electric 
appliances, switches, thermostats, air conditioners and so on, whether they are regularly switched off 
when not in use. We are not even aware whether our doors are locked, before we leave to work. This 
results in Energy wastage, security risk, and eventually leads to stress. 
In our method we suggest an all in one method to control our appliances by using a simple 
android mobile phone. Though there are many home automation techniques which are operated in 
considerably high power and carrying a remote is necessary. We suggest an ease off method by using 
an Android phone with minimal power specifications. 
The main purpose of this concept is to conserve energy just by means of using his/her Android 
Smart phone and to provide an easy access in the process to the user. 
 
I. INTRODUCTION: 
A typical ARM (Advanced RISC Machine) processor is one which controls its hardware peripherals using 
programming techniques. The programming concept is based on reduced instruction set computing 
(RISC), by means of which the hardware can be controlled by user program. 
We thought of giving the ARM processor an ANDROID operating system controlled instruction 
sets, due to its Open source license agreement. The main advantage of an android is that every hardware 
peripherals can be individually programmed according to the user. 
By developing an android application, it can be installed in the smart phone and the user interface 
generates certain codes which can be fed into the ARM processor. If this ARM processor is connected to 
the main circuit board, then the user can control all his appliances, through 2G/3G data connections. 
II. ARM PROCESSOR: 
A typical The ARM7TDMI-S is a general purpose 32-bit microprocessor, which offers high performance 
and very low power consumption. The ARM architecture is based on Reduced Instruction Set Computer 
(RISC) principles, and the instruction set and related decode mechanism are much simpler than those of 
micro programmed Complex Instruction Set Computers. This simplicity results in a high instruction 
throughput and impressive real-time interrupt response from a small and cost-effective processor core. 
International Journal of Student Research in Technology & Management 
Vol 1(1), pg 12-17 
 
www.giapjournals.com Page 13 
 
Pipeline techniques are employed so that all parts of the processing and memory systems can 
operate continuously. Typically, while one instruction is being executed, its successor is being decoded, 
and a third instruction is being fetched from memory. 
The ARM7TDMI-S processor also employs a unique architectural strategy known as THUMB, 
which makes it ideally suited to high-volume applications with memory restrictions, or applications 
where code density is an issue. 
ARM7TDMI-S can be operated in two modes 
•  The standard 32-bit ARM instruction set. 
•  A 16-bit THUMB instruction set.  
Depending upon the user need either mode can be used. In our proposal it is operated in 32 bit mode. 
III. BLOCK DIAGRAM: 
 
 
 
Fig 1.1 LPC2148 Architecture 
 
Fig 1.1 shows the general block diagram of ARM&TDMI-S processor. Here for our purpose we use LPC 
2148 NXP IC for controlling the relay circuits and switches. 
 
www.giapj
 
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International Journal of Student Research in Technology & Management 
Vol 1(1), pg 12-17 
 
www.giapjournals.com Page 15 
 
VI. METHODOLOGY: 
STAGE I: 
The ARM processor is placed in the main circuit board. Each of its Chip-select pins is connected to the 
circuits of the appliances via the relay circuits provided by us. The ARM processor is programmed in 
embedded C programming language and the code is burnt using KIEL MICROVISION software. For this 
purpose GPIO pins are used. These pins tracks the appliances condition whether it is ON or OFF. 
STAGE II: 
The next step is developing an Android application. The application interface consists of an android app 
which contains toggle switches and denoting the corresponding appliance or relay. 
An application is developed in Android platform using ECLIPSE IDE development software / ADOBE 
FLASH BUILDER. The source code is written and the interface file .apk is generated and installed in 
user’s android mobile. 
STAGE III:  
On the other side the ARM processor is connected through Ethernet connection via RJ45 cable IEEE 
802.3. This ensures the ARM processor is in data connection as the data pins are connected to the relay 
circuits of appliances. The IP of user’s mobile phone is configured according to the IP of ARM processor. 
When the user opens the applications and begins to interact with the toggle switch provided, the 
underlying code is debugged by the ARM processor and the corresponding appliance is controlled. Every 
code is unique and it is matched  
Since the ARM processor is operated at 3.3V,  and can be made to operate in INTERUPT mode, less 
power is consumed. The main advantage is that the user can control his/her appliance anywhere 
irrespective of distance since it uses standalone connection using 3G and Ethernet IEEE 802.3. 
LOGIC DIAGRAM: 
The below mentioned diagram shows the logic connection of how everything is connected. The main 
advantage is that it can also be done using ZIGBEE module in the case of user doesn’t use Ethernet 
connection. 
 
International Journal of Student Research in Technology & Management 
Vol 1(1), pg 12-17 
 
www.giapjournals.com Page 16 
 
 
 
VII. FUTURE ENHANCEMENTS: 
The Proposed methodology can be enhanced by porting the ANDROID OS in ARM processor. And it can 
perform more enhanced tasks like notifying the user about any danger. 
It can be implemented in retail shops and universities and any other public sectors where one can 
easily check up their appliances. 
VIII. CONCLUSION: 
Thus the traditional method of controlling relays through GSM module by typing message and receiving 
message through SMS can besmartly changed by our proposal, where user can control just by using a 
simple application. 
IX. CURRENT WORK PROGRESS:  
Currently we are working keenly in developing an Android app. This is the main task for us since the app 
should generate different codes for each toggle switch interface. 
 ARM processor porting will be completed before 25 and the project is expected by us to get 
completed by 1st of March 2013. 
 
 
 
International Journal of Student Research in Technology & Management 
Vol 1(1), pg 12-17 
 
www.giapjournals.com Page 17 
 
 
REFERENCES:  
1. Vance, Ashlee (27 July 2011). "Steve Perlman's Wireless Fix". Bloomberg Businessweek. 
Bloomberg.Retrieved 3 November 2012. 
2. "UI Overview | Android Developers". Developer.android.com. Retrieved 2012-09-15. 
3. "ARM Cores Climb Into 3G Territory" by Mark Hachman, 2002. 
 
 
 


ANDROID - ARM BASED SWITCH CONTROL USING SMART PHONE

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