Project on Design of Automated Door Locking System using Bluetooth

This project report details the design and implementation of an automated door locking system. The system utilizes Bluetooth technology (HC-05) and an ATmega16 microcontroller to provide secure and automated door access. The project outlines the objectives, including creating a compact design, using readily available electronic components, and ensuring compatibility with Android devices. The author, acting as the chief electronics engineer, details their responsibilities, including proposing the system design, integrating electronic components, and interpreting data. The report also addresses challenges encountered, such as selecting the appropriate Bluetooth module (initially using ESP8266 before switching to HC-05) and setting the correct data transmission rate (9600kbps), and the solutions implemented. The system's functionality is explained through a block diagram, highlighting the roles of the microcontroller, Android phone, Bluetooth module, power supply, and LEDs. The author emphasizes the importance of collaborative work and their contributions to the project's success. Desklib provides access to similar projects and solved assignments for students seeking assistance.

CE 2.1 Project Information
Name of the project: Designing of Automated Door Locking System
Location of the project: Please fill
Project Duration: Please fill
Organization: Please fill
Role and Designation during the time: Chief Electronics Engineer
CE 2.2 Project Background
CE 2.2.1 Characteristics of the project
The automated door locking system helps to lock as well as unlock the door
automatically. There had been several control systems that are utilized for the proper
prevention of access to any type of unauthorized user. During this project, I have utilized
various electronics parts for the purpose of building the integrated security system for any
building after the utilization of Microcontroller as well as Bluetooth technology. I made thus
automated door locking system in extremely lower cost in comparison to the other available
security systems. My main motive was to make the system that would provide constant
service with registered passwords to lock and unlock the door. I have used two methods in
this system. In the first method, the user have to enter the password for door locking and in
the second method, this user would again enter password for unlocking that door. As a result,
in the project, I have delivered the design of the automated door locking system by using
Bluetooth device of HC-05.

CE 2.2.2 Objectives developed for the project
I have developed the design of automated door locking system for locking as well as
unlocking the doors. I took the decision to use Bluetooth technology and microcontroller
technology for making the system more safe and secured. I selected GSM technology for
making the system automated. I even ensured that this door locking system could be used
with all versions of android devices. Hence, to complete the project with utmost efficiency as
well as priority, some of the important objectives were developed by me.
 To provide a complete and compact design for the Automated Door Locking System.
 To use several electronic parts that are available easily and hence build the integrated
security system for any building.
 To utilize Microcontroller technology and Bluetooth devices for the integration
purpose.
 To provide services at extremely lower costs in comparison to the other expensive
systems.
 To make the system supported by every version of android device and also provide a
user-friendly environment to the users.
 To compare and contrast the experimental results with the desired results.
CE 2.2.3 My area of work
Being an electronics engineer, it was quite easier for me to provide the design of the
automated door locking system and hence I was selected as the chief electronics engineer. I
had proper idea of data interpretation and thus the ASCII characters that are sent by the
android phones by proper means of my developed application. Since, I had been a part of
several important electronics projects, I had a basic idea of these types of systems. I even had
the ideas of Android SDK to develop the android application. Hence, since I had proper

Head of the
Department
Project Supervisor
Chief Electronics
Engineer (Me)
Team Member Team Member
knowledge of android application and automatic systems, I was recruited as the chief
electronics engineer.
CE 2.2.4 Project Group
Figure 1: People involved in the project
CE 2.2.5 My responsibilities throughout the project
During the accomplishment of this project, I had various responsibilities. My most
noteworthy responsibility was to propose a proper design for the automated door locking
system. My other responsibility was to use the several electronics parts and even to build the
integrated security systems. I was also assigned for the work to use the microcontroller
technology and Bluetooth device for integrating the security systems. The other
responsibilities that I had in this project was to interpret the data as well as ASCII characters.
For developing the application, I even connected the microcontroller for configuring at the
same baud rate. I also ensured that there is a proper functionality of all the system blocks.

CE 2.3 Distinctive Activity
CE 2.3.1 Comprehending the Theory of Project
The automated door locking system is one of the major and the most significant
features on the various types of buildings. These systems have become extremely popular for
the development of the elective and efficient electronic devices for providing security. I have
used the android door locking system for both indoor and outdoor key lock systems.
Figure 2: Block Diagram of Automated Door Locking System
For displaying the messages, I have used LCD module and the systems comprise of
the lesser manual operations for maintaining the reliability and flexibility within the system. I
have selected the Atmega16 microcontroller for the programming purpose. The
microcontroller could perform the simpler math operations for the purpose of monitoring the
digital inputs. I also have used the Bluetooth device of HC-05 with 6 pins, namely Vcc, GND,
TX, RX, Key and LED. I pre-programmed it as the slave and made it master for checking the
pin configuration. I set the default rate of data transmission as 9600 kbps and selected the
range as 30m.
CE 2.3.2 Engineering knowledge and skills applied in the project
To execute this project, I have applied my understanding of digital system designing
for this project. For making the door locking system automated, I have used Android, since it

has user interface on the basis of direct manipulation for being used in the touchscreen
mobile device. As I had the idea of stepper motor properly, I selected this electromechanical
device for converting the electrical power to mechanical power. I even have used my
acquaintance of this motor as it needs 24 electricity pulses for moving the 24 steps and make
one completed revolution. I have even applied my familiarity of this Bluetooth device of HC
-05 and the microcontroller of ATmega16 and thus execution of the project was much easier.
CE 2.3.3 Accomplishment and Task Performed
I have completed my tasks by ensuring that each and every system block is
functioning proper in the system.
Serial No. System Block Functions
1. Microcontroller As the data processing center
2. Android Phone As the data inputs.
3. Bluetooth Module HC -05 As the data receiver
4. Battery of 5V As the power supply
5. Light Emitting Diodes As the main indicator
Table 1: Functions of System Blocks
I have interpreted the data that is sent by the android phone. In the beginning of the
project, I configured the Bluetooth module of HC-05 by the default baud rate of 9600 after
connecting it to the microcontroller by configuring it at the same baud rate. I selected this
microcontroller of ATmega16, since it can understand the ASCII format. Moreover, it
comprised of the analog to digital converter, serial communication port, high speed timer and
interrupt capabilities. I even developed the android application by using the Android SDK,
where the Android is the mobile OS on the basis of Linux kernel. There is user interface on

the basis of direct manipulation that is being utilized for the touchscreen mobile devices. I
made the project on the basis of Android platform that is Free Open Source Software.
CE 2.3.4 Identified issues and their solutions
2.3.4.1 Issues
The most important concern that I have confronted in this project was during selecting
the Bluetooth module. I had previously selected the version of ESP8266 Arduino compatible
serial ESP-01. This was providing erroneous results to this project and the door locking
system was not working properly. The second issue that I had faced here was setting the rate
of data transmission. I had selected the data rate of 8000 kbps and hence got the result that
was not expected in this project. These issues were bringing major delays in the project.
2.3.4.2 Solutions
For the first problem of selection of Bluetooth module, I gave the solution of HC- 05
version. Since, this module was easier to use the Bluetooth SPP or Serial Port Protocol for
designing the transparent wireless serial connection setup. I easily connected this module
with V2.0+EDR at 3mbps. For the next issue, I understood that higher data rate transmission
would be required in the project and thus gave the idea of using 9600kbps. These solutions
helped in resolving the issues properly.
CE 2.3.5 Plan to produce creative and innovative work
To execute this particular project of Designing of Automated Door Locking System, I
had to make a distinct plan for producing excellent designs as well as works. Being one of the
electronics engineer by profession, it was my core duty to make the design for this door
locking system with appropriate efficiency and accurateness.

CE 2.3.6 Collaborative Work
I provided suggestions to my team for working altogether for the reason that it
becomes stress-free for each of us to make the project successful. I then distributed the
various tasks equally within my other members of the team and undertook daily work follow
ups.
CE 2.4 Project Review
CE 2.4.1 Project Overview
The key purpose of this project was proposing a suitable design for automated door
locking system. For this particular purpose, I had to use my information of Bluetooth module
of HC-05 as well as microcontroller technology of ATmega16 to integrate the design.
CE 2.4.2 My Contribution to work
I was assigned as the chief electronics engineer in this detailed project of Designing of
Automated Door Locking System. My chief contribution was proposing the accurate design
for this project and also solving the several issues faced by us.