OTP BASED SMART LOCK SYSTEM USING GSM MODULE

The OTP (One Time Password) based smart lock system utilizes an Arduino microcontroller along with a GSM (Global System for Mobile Communications) module to provide secure access control. This system allows users to unlock a door or access a secure location by sending a unique OTP via SMS (Short Message Service) from their registered mobile phone number. The Arduino, connected to the GSM module, verifies the received OTP and controls the locking mechanism accordingly. This project combines elements of IoT (Internet of Things) and home automation to create a convenient and secure solution for controlling access to physical spaces remotely.

1. NATIONAL INSTITUTE OF TECHNOLOGY, HAMIRPUR OTP Based Smart Wireless Locking System using Arduino MAJOR PROJECT Mentor- Dr. Mahesh Angira (Assistant Professor, Department of Electronics And Communication) Group:- Kethavath Srinu (20BEC110) Rishab Kumar (20BEC093) Suryansh (20BEC091) Sohal Angiras (20DEC013)

2. CONTENTS ABSTRACT INTORDUCTION EXISTING METHOD PROPOSED METHOD  COMPONENTS REQUIRED BLOCK DIAGRAM CIRCUIT DIAGRAM  WORKING  ADVANTAGE APPLICATION FUTURE SCOPE REFERNCE

3. Security is the most concern for anyone nowadays. As the most natural way physical key is widely used to lock or unlock the door. Different locks have different keys so it is burden to carry ,sometimes it may be stolen, misplaced and lost. The purpose of the proposed system is to provide extra security that can be used in homes and services. The proposed system is OTP based smart wireless lock system using Arduino Uno. If the user generate correct password OTP is sent on the user's device via GSM. If the entered OTP is matched , then the system will be unlocked and required task can be initiated. If either of the password or OTP is wrong , then the access is denied. The proposed system provides low-cost service and high security compared to the available security systems. ABSTRACT

4. The main aim for providing locks for our home, school, office etc. is for security of our lives and property. With the advancement of technology and increase the use of IOT automatic door lock system has become a standard feature on many different types of buildings and homes. And they are become popular every day to develop electronic devices which provide security. Home security has been a major issue because of the increase in crime rate and everyday wants to take proper action to prevent unauthorized user so we propose an OTP based smart wireless lock system to enhance the security of digital door- locks. INTRODUCTION

5. The electronic wireless locking system is not that safe because you might forget your password, or it might be hacked by others, while entering the password on your device. A key-based locking system has now become outdated because if your key is lost or stolen, it creates a huge problem. Carrying a large number of keys is a burden and it can be stolen, misplaced or lost. So, we can make a smart lock that has the capability to remove all these security problems. EXISTING METHOD

6. Our goal is to design a solution for secure access control that can replace physical keys for accessing door. We propose a solution using OTP based on smart phones providing wireless and automatic unlocking via Bluetooth. The design will allow easy implementation and the device will work autonomously. This will enhance the security and will eliminate the need of carrying physical keys. PROPOSED METHOD

7. COMPONENETS REQUIRED Arduino Uno Sim 800L GSM Module 16X2 LCD Display with I2C J umper wires 4X4 Keypad Servo motor LED 9V Battery Buzzer 5V Relay Module

8. BLOCK DIAGRAM ARDUINO  UNO Servo motor Power supply LED Android  Mobile GSM

9. WORKING Write a program for controlling a servo motor using an Arduino Uno, including the servo library.  Create an Android app using MIT App Inventor for locking and unlocking a door remotely.  Connect all necessary components, including the Arduino Uno, servo motor, and power supply.  Connect the components according to the circuit diagram.  Open the MIT App Inventor app on your smartphone and enable GSM.  Pair the smartphone with the GSM module. Once paired, confirm the connection on the app.  Send the device ID from the app to the Arduino Uno for verification.  If the device ID matches, generate and send an OTP (One Time Password) to the app.  Display the OTP on the app for user verification.  Upon successful verification, allow the user to control the servo motor to lock or unlock the door.

10. Library Incorporation and Variable Declaration:       Incorporate the servo library for controlling servo motors.        Declare variables for password generation, storing passwords, OTP, and LED pin numbers.  Setup for GSM Communication:  Set up serial communication and define the Baud rate for Bluetooth. Configure the servo pin using servo attach ( PWM_pin_number ).  Define pin mode as output for the LED.   Loop for Bluetooth Data Handling:  Create a loop to continuously check for incoming data from Bluetooth.  Use an if() statement to check the device ID.  If the device ID matches, call the otp  () function to generate an OTP.  OTP Generation and Verification:  Implement the otp  () function to generate an OTP.  Create a check() function to verify the correctness of the OTP.  If the OTP is correct, activate the servo to unlock the door.

11. Now, you can tap on the lock icon to unlock your Smart Lock. If everything is ok then servo moves unlocking mechanism and onboard LED of Arduino lights up indicating successful unlock. We have used servo because of its high torque, and also because we can control the angle of its movement that helps in unlocking mechanism of lock. CONTD.. Development Using MIT App Inventor: ​  Utilize MIT App Inventor, an online platform for creating mobile applications.​  Drag and drop components to design the application interface. ​ Use visual blocks language to program the application behavior, such as sending device IDs and receiving OTPs.

12. Pros This smart lock can be easily used, it is highly safer because every time you             unlock it a new OTP will be generated. This smart lock is not very costly so it can be availed by every common                       person. This smart lock can easily replace the electronic lock system in future                       because it is highly secured.

13. Security . Does not allow unknown people. Used for Anti-thefting strategy. Reduces the efficiency of the cost. Simple and easy implementations. Less power Consumptions. FEATURES

14. Smart phone can be lost. Bluetooth module maybe connected to another device. LIMITATIONS

15. Control of doors and windows shutters Faster operation and efficient Security System This project can be used in Industries, Home, office and Shops It can be used for garage doors and gates. By using smart app, disabled or elderly people can control lock as well as appliances anywhere inside house. APPLICATIONS

16. Many times, we forgot to carry the key of our home. Or sometimes we come out of our home and door latch closes by mistake. In these cases, it is really difficult to get inside the house. The main proposal for this project is to increase the extra security to the people .This project will help in keyless entry and at the same time will be more secure. This idea will minimize the overall cost by the use of  global system for mobile communication . CONCLUSION

17. Extensions within the app cloud   Alarm beeping instant alert Camera with built-in SD card and  fingerprint sensor FUTURE SCOPE

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