SMS-Controlled Door Lock

With Image Capture using Android Phone

A Design Project

Presented to the

Faculty of

The Electrical/Electronics and Communications

Engineering Department of the

University of San Carlos

Cebu City, Philippines

In Partial Fulfillment

Of the Requirements for the Degree

Bachelor of Science in Electronics

Engineering

By

Filomeno, Gil Maica Marie V.

Ledon, Michelle P.

Lenares, Prima Socorro L.

Baltazar Raffiñan, M. Eng

Adviser

Adrian Villarin, ECE

Co-Adviser

March 2014

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v

Abstract

In this study, a door lock prototype system was designed which can be remotely accessed

by mobile devices through SMS. The aim of this study is to help homeowners monitor

their houses if there is a person at the doorstep and will alert the owner if there is a forced

entry. The prototype system was composed of the Arduino Mega ADK as the

microcontroller, Android phone as the transceiver which sends and receives the SMS

commands, Solenoid lock as the lock and Opto interrupter as the sensor for the intruder.

An Android application was built in which if all the components are integrated, the

system will function according to the commands requested by the homeowner where it

capture images of force entry person then sends it through MMS and notifies the

homeowner of the state of the lock after sending the lock command. The system’s

performance is analyzed by accessing the system, first sending commands and triggering

the doorbell and the alarm on the system at different places with different signal strength

in order to test how fast the system will respond. Data will be collected from the success

and failure of attempts by sending commands and receiving SMS and MMS.

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Approval Sheet

This Design Project entitled “SMS Controlled Door Lock With Image Capture Using Android Phone”, prepared and submitted by Filomeno, Gil Maica Marie V., Ledon, Michelle P. and Lenares, Prima Socorro L., in partial fulfillment of the requirements for the degree of Bachelor of Science in Electronics Engineering has been examined and is recommended for acceptance for Final Defense.

THESIS PROJECT COMMITTEE

Albert Bañacia, M’Eng. Chairman

Sheila Mae E. Jungco, ECE Jerome M. Puza, ECE Member Member

Balatzar Raffiñan, M’Eng. Adrian D. Villarin, ECE Adviser Adviser

PANEL OF ORAL EXAMINERSApproved by Thesis Project Committee with a grade of PASSED.

Albert Bañacia, M’Eng. Chairman

Sheila Mae E. Jungco, ECE Jerome M. Puza, ECE Member Member

Baltazar Raffiñan,M’Eng. Adrian D. Villarin, ECE Adviser Adviser

Accepted in partial fulfillment of the requirements for the degree of Bachelor of Science in Electronics Engineering.

March 5, 2014 Isabelo A. Rabuya, MSEEDate of Project Oral Defense Chairman, EE/ECE Department

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ACKNOWLEDGEMENT

Thesis Project is one of the most challenging courses of a college student. It needs team work, faith, trust and dedication in committing this task. This wouldn’t have been made possible without these people who have extended their help in making this project into a reality. We, therefore, would like to extend our profound gratitude to the following:

OUR BELOVED GOD THE FATHER, who is there guiding us in all the trials, for the good health, for enlightening our minds and giving us faith to accomplish this project.

ENGR. BALTAZAR RAFFIÑAN and ENGR. ADRIAN VILLARIN, our supportive advisers, who sincerely share to us the knowledge they knew and guiding and supervise in making this project.

ENGR. ALBERT BAÑACIA, ENGR. SHEILA MAE JUNGCO, AND ENGR. JEROME PUZA, our beloved panelists, who is there to critic our design and also share to us the ideas that may be helpful in obtaining this project.

EE/ECE FACULTY MEMBERS, who teach us the knowledge that is applicable in this project; they also inspire, encourage and instilled to us a positive attitude.

ANALOG DEVICES LABORATORY, SPECIAL APPLICATION LABORATORY AND CBELS, for the accommodation in making this project and allowing us to borrow and use the materials that is needed in making this project.

MINIONS and FRIENDS, who extend their help in finishing this project and for the joy and struggles we share.

OUR BELOVED PARENTS, for the financial support, inspiration to accomplish

this project and always there cheering.

Table of Contents

iii

Title Page i

Abstract ii

Approval Sheet iii

Acknowledgement iv

Tables of Contents v

List of Figures and Tables vi

Chapter 1 The Problem and Its Settings 1

1.1 Introduction1.2 Statement of the Problem1.3 Significance of the Study1.4 Scope and Limitations1.5 Definition of Terms

Chapter 2 Review of Related Literature 5

2.1 Remote Door Lock Project

2.2 Automatic Door Lock System

2.3 Security Intrusion Alert Method and Device

to Communicate via SMS

2.4 Design and Implementation of Home Security System Based

on Laser Trip Alarm with Webcam and GPRS Module Interface

2.5 SMS based Remote Control System

2.6 Wireless Sensor Network-Based Appliance Monitoring Using

STM32 Microcontroller and XBee Module via Android App (MAP)

Chapter 3 Methodology 9

iv

1.1 Project Flow1.2 Software Implementation1.3 Hardware Tools1.4 Hardware Implementation1.5 Testing1.6 Halfway Deliverables

Chapter 4 Results and Discussions

4.1 4.2 4.3 4.4 4.5

Chapter 5 Conclusions, and Recommendations

5.1 Conclusions 5.2 Recommendations

Bibliography

Appendices

Appendix A – Gantt Chart

Appendix B – Bill of Materials

Appendix C – Schematic Diagram and Layouts

Appendix D – Module Schematics

Appendix E – Datasheets

Appendix F – Microcontroller Unit Code

Appendix G – ‘Default.php’ Page Code

Appendix H – ‘Acceleration.php’ Page Code

Curriculum Vitae

List of Tables and Figures

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Figures

Figure No. Name of Figure Page 3.1 Project Flow Chart

3.3.1 System Flow3.3.2 Intruder Alarm Flow Chart3.3.3 Command Received Flow Chart3.3.4 Doorbell Flow Chart

3.5 System Block Diagram

Tables

Table No. Name of the Table Page

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Chapter 1

The Problem and Its Settings

1.1 Introduction

The security of every home is a matter of great concern to everybody. Everyone

have a lot of things going on their everyday life. Each of them is busy with their own

life, problem, responsibilities, work, school and so on. Some are even busy that they tend

to forget the security threats that come to their premises. On average, in Manila, the

indices of people worrying about house break-ins and problems with property crimes are

about 69 percent from the year 2012 [1].

Security threats may come at a time when everyone least expect it, especially if

they forget the safety measures done when they leave their homes unattended.

There are solutions to decrease the worries and occurrences of the said crimes.

One method is to remotely monitor the property with the use of 2G technologies.  2G

technologies enable the various mobile phone networks to provide the services such as

text messages and MMS (multimedia messages) [2]. With the use of this technology, it

will help provide real-time communication with the system and the user, where the user

can remotely control the system using SMS and monitor the area by capturing an image

and send it to the user’s phone using MMS.

1.2 Statement of the Problem

Leaving a house unattended poses a great risk to its security, exposing it to

threats. But from time to time people leave their homes because of their daily routines.

Most locks today are not remotely accessible owners will have to go back to their homes

just to check it out, which will take time.

Also leaving a house unattended means leaving its owners unaware of people who

come and go.

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This study aims to develop a door lock system that can be remotely accessed from

a mobile device, which can help monitor if there is a person at the door and can alert the

owner if there is a forced entry. The objectives of this study are:

i) To design a door lock that is remotely accessible through SMS.

ii) To design a door lock that will lock, unlock and take pictures using the Android

phone’s built-in camera if the user commands.

iii) To design a door lock that can alert the owner by means of capturing an image

and sends via MMS when there is an intrusion on the said door lock.

iv) To make use of the Android operated Smartphone as the GSM Module that will

interface with the microcontroller.

1.3 Significance of the Study

The project is designed to improve monitoring and security of households. This

project allows homeowners to be more vigilant of the events that may occur. The project

will provide homeowners peace of mind, safety and ease through the use of technology.

They also have easy access and less time consumed on following up with their home

security. They can access and monitor their front door locks remotely through the use of a

mobile device via SMS and can take pictures of the person who is currently at their

doorstep.

This project will also be useful for a private owned home/house that cannot afford

to hire security personnel, people who are always in a hurry and in the midst of an

emergency. In general, the people who are concerned about the security of their property

will benefit from this project because of the remote accessibility of the door lock and

image capturing feature.

The outcome of this project study may also be used as reference by the ECE/EE

students in their future studies concerning home automation and security using wireless

technology.

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1.4 Scope and Limitations

The study will focus on designing a door lock system that can be accessed

remotely through a cellular phone.

The door lock system will consist of the following: microcontroller, an Android

operated Smartphone, door lock circuit, doorbell and the users’ mobile phone. An

Arduino Mega ADK board will be used as the microcontroller which is only compatible

for Android phone versions 2.3 and above. This board will be programmed using C or C+

+ programming language and a Java programming language for the Android phone.

The Android Phone, which is connected with the microcontroller, will receive the

commands from the users through a mobile phone, which are to LOCK, UNLOCK and

TAKE A PICTURE. The Android phone will be used to capture an image and send it

using MMS to the users’ phone. Only one image will be captured in every command

“TAKE A PICTURE” and when an intrusion occurs. The captured image will be limited

to the viewing angle or position of the Android operated phone’s camera. The captured

image will be stored in the Android operated phone’s SD card where the size will depend

upon the users’ choice.

The Android Phone should have a regular load balance in order to perform

transactions like sending SMS and MMS to the user’s phone. This study will use any

network as the Subscriber Identity Module (SIM) for the Android Phone.

The door lock circuit will consist of the following: electromagnetic lock, relay

circuit and intruder alarm circuit. The system will alert the registered numbers if there is

an intrusion on the said door lock by immediately sending an SMS and MMS to the

designated numbers when the intruder alarm is triggered. The default state of the door

lock will be LOCKED unless triggered and will remain on that state until another

command is receive. In emergency situations with no supply of electricity, a key will still

be used to manually open the door.

The system will be programmed to only accept the commands from the registered

numbers of the system. The system will authorize at most of 2 registered numbers. The

user can monitor the door if ever there is someone in front of it by taking a picture. It can

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monitor the door lock if ever the user wants to know its current state (locked or

unlocked).

This study is limited to one door lock only and to areas that have network

coverage.

1.5 Definition of Terms

Short Messaging Service (SMS) - it is a system that enables cellular phone to send and

receive text messages.

Multimedia Messaging Service (MMS) - is a standard way to send messages that

include multimedia content to and from mobile phones.

Arduino ADK- a type of microcontroller that has already a (universal serial bus) USB

interface and can be connected to Android phones.

Android (Operating System) – is a Linux-based operating system for mobile phones.

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Chapter 2

Review of Related Literature

In this chapter, different studies that are related to the proposed study will be

presented. The following are the summary of each different study. It has its advantages,

disadvantages and differences between the different study and the proposed study.

2.1 Remote Door Lock Project

The study [3], designed and implemented a remote door lock that helps users in

two ways; first is to check the status of the lock to make sure the user locked the door

when in a remote area and allow user to remotely lock or unlock the door with a text

message sent to the system from the user’s phone. Second is when someone rings the

user’s doorbell and a camera will take the picture of the person at the door and sends an

MMS to the user’s phone. The user will then reply to the MMS sent with a text message

to allow or deny them an access. The system has several components, the server, an

Ionics Plug Stratus Computer, which interacts wirelessly with the microcontroller,

wireless camera and the client’s phone. The microcontroller used is an Arduino PRO that

is connected to the door lock mechanism.

This study is similar to the proposed study since it uses the GSM Technology to

control the lock, however, the way of communication between the system and the user’s

phone is through the server or the plug computer, which uses the internet in sending text

messages and picture messages to the user’s phone, which also receives the messages

from the user’s phone. This actually limits their study for homes that have internet

connection.

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2.2 Automatic Door Lock System

From the study [4], the proponents designed an Automatic Door Lock System for

teachers or lecturers. The purpose of the study is to secure the lecture rooms from thieves.

The study uses MC68HC11A1 as the microcontroller and Sony Ericsson K700i as

the system receiver which supports AT-Commands. There are many ways of AT-

Commands that suites to the user’s needs, user can check the phone number, read and

send text message, delete message, check the service center number, select phone

memory and many more. The door was designed based on the electromagnetic principle

which will open when the right code is received by triggering the relay to normally open.

The proposed study is similar to the study that uses electromagnetic principle for

the door. However, the controller that will be used in the proposed study is Arduino

Mega ADK. The disadvantage is that it can only unlock the door and there is no charging

point for the phone.

2.3 Security Intrusion Alert Method and Device to Communicate via

SMS

From the study [5], the purpose of the invention is to provide a security device

which gives immediate notification to multiple persons at the moment the intrusion

occurs.

The study uses remote sensors in a remote array depending on the application

(Alarm Signal Sensor, Vibration Sensor, Electromagnetic Sensor, Infrared Sensor,

Optical Sensor), which activates a Global Service Module (GSM) to send one or more

SMS (Short Message Service) messages to the recipients at the time of intrusion, a PIC

Micro-Controller that can handle 'C' Language application of approximately 50,000 C

statements or 1MB, and a GSM module.

The PIC Micro controller is then connected to an actuator. In order to activate the

GSM Module a relay is activated from the PIC Micro controller.

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The study is similar to the proposed study since it also deals with security. It

notifies multiple people when there is someone at the property but to those numbers who

are registered in the system only.

2.4 Design and Implementation of Home Security System Based on

Laser Trip Alarm with Webcam and GPRS Module Interface

From the study [6], the proponents design and implement a home security using

laser trip alarm. The purpose of the study is to send intruder’s image to the homeowners

whenever there is intrusion.

The study uses GPRS technology in sending MMS to the homeowners if there is

an intrusion. MMS is used to send image captured to the users, its feature has a

multimedia message size limited to 300 kilobytes and data packet capability of 38.4kbps.

Arduino controller named Gizduino v3.0 is used as a controller of the system. The laser

alarm system is used to notify owners that there is an intrusion, the main component are

LDR and laser pointer. Sending MMS to the user’s mobile phone is done by integrating

MMS AT command to Arduino.

The proposed study is similar to the study that uses MMS in sending image

capture to the user’s mobile phone. Instead of using an external web camera, an android

phone with a built-in camera will be used to capture image.

2.5 SMS based Remote Control System

The study from [7] designed a control system that is implemented through a

microcontroller-based control module that receives commands and instructions from a

cellular phone over the GSM module. The system can control up to 16 electrical devices

that can switch on or off the devices at home remotely. The mobile phone is integrated

with the microcontroller PIC16F873A which receives an SMS message from the user’s

mobile phone and sends a command to the controller to control whether to turn ON or

OFF the output. The mobile phone also sends status reporting to the user regarding the

electrical appliance.

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The study is similar to the proposed study that can control a device through SMS.

It is a home automation that can control up to 16 electrical devices unlike the proposed

study which will only control the front door. They also differ in the microcontroller used

and can monitor the status of the devices compared to the proposed study wherein

monitoring the status of the lock will not be included.

2.6 Wireless Sensor Network-Based Appliance Monitoring Using

STM32 Microcontroller and XBee Module via Android App Mobile

Access Panel (MAP)

The study [8], designed a wireless sensor-network based appliance monitoring.

The purpose of the study is to control and monitor the status of the home appliances.

The study uses, GSM module as an interface between the controller and the user’s

mobile phone. Android App (MAP) is used in monitoring and controlling the status of

home appliances. STM32VLDISCOVERY is used as the controller of the system and

will be used to convert signal to ASCII codes. In making the Android App, Java language

is used.

The difference between this study and the proposed study is that the proposed

study uses Android App to register the phone numbers of the people that will have access

to the house.

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Chapter 3

Methodology

This study is a design demonstration research of a remotely accessible door lock

system. Project construction consisted of: (1) Hardware design and implementation of a

microcontroller connected to intruder alarm system, doorbell and door lock driver. (2)

Coding of the program the microcontroller unit for triggering the doorbell and the

intruder alarm; and for controlling the state of the solenoid lock. (3) Making an

application on android phone for the command of the user. This chapter will present the

materials and methods that were used in the construction, testing and evaluation of the

system in the study.

3.1 Project Flow

The implementation of the lock system proceeds as follows:

Figure 3.1 Project Flow Chart

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Figure 3.1 shows the overview of the entire system of the study where the door lock

system and a user’s phone can remotely communicate with each other.

The door lock system consists of the MCU, a doorbell, door lock circuit, intruder

alarm circuit, android phone and a user’s phone. The MCU is wired with the doorbell,

intruder alarm circuit and door lock circuit. A USB connection is needed between the

MCU and the Android phone. The MCU receives a triggering signal from the doorbell to

send an SMS to the user notifying a visitor at the user’s house. The Android phone serves

as the GSM module, a medium in order for the user’s phone and the microcontroller to

communicate remotely through SMS. It is also used for taking pictures if the user

commands and when an intrusion is detected. The door lock circuit is composed of a

solenoid lock and a driver circuit for automatic locking and unlocking of the lock and an

opto- interrupter sensor for the intruder alarm circuit.

3.2 Software Tools

3.2.1 Eclipse and Android SDK

Eclipse is a multi-language Integrated development environment (IDE)

comprising a base workspace and an extensible plug-in system for customizing the

environment. It is written mostly in Java and it is the official integrated development

environment (IDE) supported by Android SDK using the Android Development Tools

(ADT) Plug-in. The Android software development kit (SDK) which is developed by

Google includes a comprehensive set of development tools. This includes a debugger,

libraries, a handset emulator based on QEMU, documentation, sample code, and tutorials.

The two go hand in hand in configuring and making applications for Android phones

with the help of Java Development Kit (JDK) for proper functionality. Through

downloading the adt-bundle-windows-x86_64-20130917 which is compatible for 64-bit

system, the necessary API’s needed by the system were downloaded through the SDK

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Manager. The API used was based on the version of the Android Phone we were using,

which is API level 16 since the phone has an OS version of 4.1.2 where it belongs to.

3.2.2 Arduino IDE 1.0.4

Arduino IDE 1.0.4 will be the integrated development environment (IDE) that

will be used in this study. The Arduino IDE is intended for the Arduino Boards. It is a

cross-platform application written in Java which is capable of compiling and uploading

programs to the board with a single click. It will enable the proponents to develop and

compile the necessary codes written in C or C++ programming language. In order for the

Android Phone to communicate with the microcontroller, the ADK Reference Package

was downloaded and extracted to install the two necessary libraries which are the

AndroidAccessory and USB_HOST_Shield and put it in the

<arduino_folder_root>/library directory. It has two important methods for coding, first is

the setup method which only runs once at the beginning of the code execution, this is

where initializing routines are placed and second is the loop method, which runs in an

endless loop until the board is reset, this is where the program logic are implemented.

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3.3 Software Implementation

3.3.1 System Flow

Figure 3.3.1 System FlowIn Figure 3.3.1, it shows the system flow of the proposed project. After starting

the system, it will check if one of the actions is present: Alarm was tripped, Door bell

was pressed or Command was received, then the system will respond according to the

action present at the moment. If, however, two or more actions are present, it will first

check and take action first when Alarm was tripped, second, when Doorbell is pressed

and third when a command was received. After the system has properly completed its

responses, it will loop back to checking the system again if one of the actions is present.

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3.3.2 Intruder Alarm, Command Received & Doorbell Flow Chart

Figure 3.3.2 Intruder Alarm Flow Chart

Figure 3.3.3 Command Received Flow Chart

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Figure 3.3.4 Doorbell Flow Chart

Figures 3.3.2, 3.3.3, & 3.3.4 above, show the corresponding process taken when a

certain action is detected or checked.

For the Intruder Alarm Flow Chart, the system will be initialized first, thus every

component and circuits are set to its default state. It will then check if the Door lock

alarm was activated. If it was triggered, the microcontroller sends a CAPTURE IMAGE

command to the Android Phone. The phone will take one picture as triggered by the

microcontroller. The microcontroller will then send INTRUDER command to the

Android phone, which will send the captured image to the users’ registered numbers

along with an intruder alert message.

For the Command Received Flow Chart, it will ask if there is a received

command from the user. When there is no received command, the system will still be on

its default state. If there is a received message, it will check what mode or command is it

in. For LOCK mode, the microcontroller will output a “0” or a low voltage to the door

lock circuit which will make the electromagnetic lock locked. For UNLOCK mode, the

microcontroller will output “1” or high voltage to the door lock circuit which will make

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the electromagnetic lock unlocked. For the TAKE PICTURE mode, the microcontroller

will send a CAPTURE IMAGE command to the android phone. It will then send

VISITOR command, which will send the captured image to the user’s phone with a

visitor alert message.

In Figure 3.3.4, the system starts with the initialization of all the components that

composes the system. If the doorbell is activated, the microcontroller will process the

command from the doorbell to the Android phone and then sends an SMS to the user that

there is someone at the door. If the user receives the SMS then he/she will then decide to

take a picture of the person who is at the doorstep or not. If the user decides to take a

picture then the microcontroller will send a command to the Android phone to capture the

image and process the image captured from the Android phone and sends it to the user.

3.4 Hardware Integration

The door lock system consists of the microcontroller, the doorbell, the android

phone, the door lock circuit, the intruder alarm circuit and the power supply. Only this

part of the system has the hardware input and output function in order to be sent to the

user phone.

3.4.1 Arduino Mega ADK

The Arduino Mega ADK microcontroller board is based on the ATmega2560. It

has a Universal Serial Bus (USB) host interface to connect with Android based phones,

based on the MAX3421e IC. It has 54 digital input/output pins (of which 15 can be used

as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal

oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It can be

powered through a USB cable, an AC-to-DC adapter or a battery [9].

The Arduino Mega ADK was used as the main microcontroller of the door lock

system since it is compatible and specifically used for smart phone with Android OS

version from 3.1 and later with the use of the USB library which is also back ported on

OS version 2.3.4 and 2.3.3. It communicates to USB devices through the USB Host Chip

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included in the board with the use of the three libraries MAX3421e, Usb and Android

Accessory. The MAX3421e handles the USB Host Chip, the Usb handles the USB

communication and the Android Accessory handles the checking if the device connecting

is one of the available accessory-enabled phones. In order for the microcontroller and the

Android phone to communicate with each other it should be assured that the two passed

back and forth product and Vendor ID’s that supports accessory mode which you can see

when you connect the two devices, for the two to communicate the Vendor ID must be

from Google which is 0x18D1 and the Product ID must either be 0x2D00 or 0x2D01 to

established connection to communicate. This microcontroller acts as the USB Host which

controls all the commands of the system.

3.4.2 Android Phone

An Android phone was used as the system transceiver and GSM module

interfaced with the microcontroller. It has an open source Linux-based operating system

in which applications are developed through Java language using the Eclipse IDE and the

Android SDK which provides the API libraries and developer tools necessary to build,

test and debug apps for Android. It is the one responsible for the sending and receiving of

the SMS and MMS to the user’s phone if ever the commands are executed.

LG Optimus V (E612) with an OS version of 4.1.2 and an API level 16 was used

as the android phone in the system which is connected to the microcontroller through a

USB cable. The phone was used since it is compatible to the microcontroller because of

its Vendor and Product ID that corresponds to the supported ID’s which are 0x18D1 and

0x2D01 respectively. The phone gets its power from the microcontroller. This phone acts

as an Accessory to the microcontroller since it is not capable of functioning as a Host.

3.4.3 Lock Driver Circuit

The Lock driver circuit was used as the driving circuit for the solenoid lock. It is

composed of a 2N2222 NPN transistor, MTP3925 P-MOSFET and diodes. The diode

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was used to protect the transistor from back emf generated by the relay coil at transient

points. The 2n2222 is a NPN bipolar junction transistor, it suits for small relays. When

the input is 1 the state of the solenoid lock is lock, and when 0 the state of the solenoid is

unlock. The input supply is taken from pin5 (analog input) of the MCU.

3.4.4 Intruder Alarm Circuit

Opto-interrupter was used as the sensor to detect when there is intrusion, whenever there is an object blocking the sensor, the voltage of collector-emitter is high and low when there is no object block. An inverter is used to light the led when there is intrusion and off when it is not trip. Pin6 is connected to the circuit as an input pin from the MCU and pin5 as the output pin to the MCU. The circuit schematic and layout can be found at the Appendix C.

3.4.4 Electromagnetic Lock

A lock-style solenoid lock 12VDC was used as the door lock of the system. It

consist an electromagnet and an armature plate. It uses the concept of electromagnetism,

when the lock is applied 12V it instantly opens and locks when power is cut. It has a

driver circuit to control its state. The study belongs to a fail secure type of electric

locking devices. Fail secure locking device remains locked when power is lost.

3.4.5 Power Supply

The power supply that was used is an external power source of 12VDC output of an AC-DC converter from the 220V AC supply. It was used to drive the solenoid lock and to power the arduino Mega ADK. The 5V supply is used in triggering the doorbell and for the intruder circuit will be taken from the output voltage of the Arduino Mega ADK. The output voltage (5V) of the arduino was used as the input voltage of the driver circuit.

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3.5 Hardware Implementation

The overview of the system is presented below:

Figure 3.5 System Block Diagram

Figure 3.5 shows the overview of the entire system of the proposed study where

the door lock system and a user’s phone can remotely communicate with each other.

The door lock system consists of the MCU, a doorbell, door lock circuit, android

phone and a user’s phone. The MCU is wired with the doorbell and the door lock circuit.

A USB connection is needed between the MCU and the Android phone. The MCU

receives a triggering signal from the doorbell to send an SMS to the user notifying a

visitor at the user’s house. The Android phone serves as the GSM module, a medium in

order for the user’s phone and the microcontroller to communicate remotely. The

Android phone is also used for taking pictures if the user commands and when an

intrusion is detected. The door lock circuit which is composed of an electromagnetic lock

and a relay circuit for automatic locking and unlocking and for the intruder alarm.

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3.6 Coding of the Arduino Mega ADK and the Android App

The Arduino Mega ADK was programmed for controlling the lock, the intruder

alarm circuit, the doorbell and the Android Phone. It was programmed using Arduino

1.0.4 IDE for the configuration of the commands. First thing to do is to make the

microcontroller and Android Phone recognized each other by connecting them together

through USB connection. For the Arduino coding, some descriptive strings are added that

contains the initialization of an AndroidAccessory object, the important parameters are

Manufacturer, Model and Version these parameters should coincide with the parameters

declared in eclipse for building the app. In the setup routine, an active state of the object

with the powerOn method should be set always since it is in this part that the Arduino

checks if there is an Accessory connected to it. When connection is established, the serial

monitor will print the lines below:

Figure 3.7 Serial Monitor output of the Arduino application

recognizing the Android Phone.

Once the lines below are achieved, the two devices now recognized each other.

For the two devices to communicate there is a self-defined protocol to be defined since

messages are sent and received via byte-streams in Android App this is done by reading

the input-and output stream of a special file. The message to be sent and received is

composed of 3 bytes which are the command byte which defines what kind of message to

be transmitted, the target byte which will define the actual target for that command and

the value byte which defines the actual value to be transmitted to or from the target.

These bytes should be declared in both the Arduino and Eclipse.

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Figure 3.8 Microcontroller Unit Program Flow

For the Android part, there are steps to follow for the Android Phone to

communicate to the microcontroller. First is to specify the intent filter for the USB

Accessory. Second is to declare the corresponding resource file that specifies the USB

accessories, the declaration should be the same as that of the microcontroller. Third is to

obtain permission to communicate with the accessory connected. Fourth is to register

broadcast receiver in the onCreate() method. Fifth is to use the UsbManager to obtain a

file descriptor to set up the input and output streams to read and write data to descriptor

and last is to terminate communication to the accessory when it is done communicating

or if t is detached by closing the file descriptor by calling close().

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Baud Rate Communication Configuration

Define the Different Variable Declarations and

the Pin Constants to be controlled

Read the Received Data into the Byte Array and Sends Data to Android

depending on the Command

Executes the commands received

and sent

Figure 3.9 Android Activity Lifecycle

The development of the Android App is composed of three classes which are the

MainActivity.java, IncomingSms.java and the CameraPreview.java. The Main

Activity.java is the class where the code for communicating the Android Phone, the App

and microcontroller were established. The IncomingSms.java is the class responsible for

receiving the incoming and sending the outgoing SMS and the CameraPreview.java is the

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class responsible for the previewing of the Camera to be displayed on the screen of the

Android phone.

3.7 Testing

Preliminary test on the individual components or parts will be conducted first on

the project. Individual testing on the door lock circuit, the microcontroller with the

Android phone when the user sends commands, if the system will respond after being

triggered by the doorbell and if the Android phone captures an image after receiving a

command from the controller. Preliminary tests will be done before integrating the

system.

After system integration, the prototype of the project will be tested. During the

prototype testing, the proponents will try and access the system by first sending

commands and triggering the doorbell and the alarm on the system at different places,

different places with different signal strength in order to test how fast the system will

respond. Data will be collected from the success and failure of attempts by sending

commands and receiving SMS and MMS.

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Chapter 4

Results and Discussions

This study aimed to developed a remotely door lock system where users can

remotely access the door and monitor the state of the door. The system was tested

according to its performance, reliability and based on different factors. This chapter

presents the different findings and our analysis based on the outcome of different trials.

Table of the results are shown and observed trends are discussed.

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Chapter 5

Conclusions and Recommendations

5.1 Conclusions

An SMS controlled Door Lock with image capture using Android Phone was

designed to monitor the front door of the house when homeowners are not around. The

researchers were able to build a prototype system which is composed of an Arduino

Mega ADK microcontroller, Solenoid Lock and its driver circuit, an intruder alarm

circuit with an Opto Interrupter as the sensor and the Android Application from an

Android Phone which acts as the transceiver of the system that receives the commands

from the homeowner.

The researchers were able to design and build the circuits used in the system and

the Android Application. The intruder alarm circuit operates when the Opto- interrupter

is triggered through the homeowner’s command of the system to activate the intruder

circuit that allows it to take picture instantly and stores it in the memory card of the

phone.

All in all, the researchers were able to monitor and control wirelessly the front

doorlock of the house through SMS. Out from the tests that were made, the delay, failure

and success of the sending and receiving of SMS vary according to the signal strength of

the Android Phone. The Door Lock Prototype was implemented and able to accomplish

the objectives stated in this project except for sending the captured image through MMS

because of the fact that Google did not include MMS API support for android 4.0 and

above.

5.2 Recommendations

After a thorough analysis of the data, the following recommendations have been made:

The system should have a back-up power supply to prevent outrage of power when sudden power failure occurs.

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The Solenoid Lock should be replaced with an electromagnetic lock that can be accessed by a key so that the homeowner can use the key when there is outage of power.

The App made must be developed more so that it can be accessed through registered numbers only specified in the App and can reply to the registered numbers when commands are executed not just to the number who sent the commands.

25

Bibliography

[1] [ONLINE] http://www.numbeo.com/crime/city_result.jsp?country=Philippines&city=Manila

[2] [ONLINE] https://en.wikipedia.org/wiki/2G

[3] Scott Velivis, Rob Lee-Own, Max Sobell, Vincent Lin “Remote Door Lock Project,” Stevens Institute of Technology, May 2010.

[4] Mohd Helmi Alysyukran Bin Abd Malik “Automatic Door Lock System,” Universiti Teknologi Malaysia, April 2008.

[5] Sikarwar, Shailendra S.,”Security Intrusion Alert Method and Device to Communicate via SMS,” International Journal of Wireless Communication (Bioinfo), 2011.

[6] Johndon-Edd Magallanes, Sean MichaelRuiz, Cris Encallado, Kristian Niño Capoy “Design and Implementation of Home Security System Based on Laser Trip Alarm with Webcam and GPRS Module Interface,” University of San Carlos, March 2013.

[7] Chauhan, Singh, Agrawal, Kapoor, Sharma, “SMS based Remote Control System,” IJCSMS International Journal of Computer Science and Management Studies, vol. 11, Issue 02, Aug 2011.

[8] Raymart Aurora, Joseph Eulen Caballo, Dexter Paalisbo, Wuven Sabala “Wireless Sensor Network-Based Appliance Monitoring Using STM32 Microcontroller and XBee Module via Android App Mobile Access Panel (MAP),” University of San Carlos, March 2013.

[9] [ONLINE] http://arduino.cc/en/Main/ArduinoBoardADK

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APPENDICES

27

Appendix A

Gantt Chart

28

Appendix B

Bill of Materials

Items Price (Php) Quantity Total Cost Arduino Mega ADK 3500 1 3500

Android Phone 1Solenoid Lock 1

Pre-synthesized PCB 100 1 100Power Splitter Adapter Cable 80 1 80

PrintingLoad ----- ----- 104

Skid Protector 59.75 1 59.75Screw 1.5 10 15

1N4001 1 4 42N2222 8 1 8

RESISTOR .50 10OPTO-INTERRUPTER 45 1 45

MTP2955 95 1 95Shipping & Delivery Miscellaneous 50

Total Amount:

29

Appendix C

Schematic Diagram and Layouts

Door Lock driver circuit and Push button

30

Intruder Alarm Circuit

31

32

Curriculum VitaeName Gil Maica Marie V.

Filomeno

Nickname gil, maica

Address Lapu-Lapu City, Cebu, Philippines

Contact Number

09339681059

Email Address gil.filomeno@yahoo.com

Pick-up Lines My love for you is like a concave up function because it is always increasing.

Personal Background

Date of Birth December 18, 1992

Gender Female

Nationality Filipino

Educational Background

College Education

University of San Carlos – Talamban Campus, Batch 2014

Bachelor of Science in Electronics Engineer

Secondary Education

Saint Alphonsus Catholic School, Batch 2009

Primary Education

Lapu-Lapu City Central Elementary School, Batch 2005

Curriculum Vitae

33

Curriculum VitaeName Michelle P. Ledon

Nickname mich, michelle

Address Mahayahay, Lapu-Lapu City, Philippines

Contact Number

09327812230

Email Address ledon29@yahoo.com

Pick-up Lines Let's convert our potential energy to kinetic energy.

Personal Background

Date of Birth July 29, 1992

Gender Female

Nationality Filipino

Educational Background

College Education

University of San Carlos – Talamban Campus, Batch 2014

Bachelor of Science in Electronics Engineer

Secondary Education

Asian Learning Center, Batch 2009 Primary Education

Asian learning Center, Batch 2005

Name Prima Socorro L. Lenares

Nickname prima, primz, prim2x

Address Poblacion, Dalaguete, Cebu, Philippines

Contact Number

09336923705

Email Address Primalenares_14@yahoo.com

Pick-up Lines You're hotter than a Bunsen burner set to full power!

Personal Background

Date of Birth April 14, 1993

Gender Female

Nationality Filipino

Educational Background

College Education

University of San Carlos – Talamban Campus, Batch 2014

Bachelor of Science in Electronics Engineer

Secondary Education

St. Mary’s Academy of Dalaguete, Batch 2009

Primary Education

Dalaguete Central Elementary School, Batch 2005

34