Knock Detecting Door Unlock System using IOT

This paper presents the design and implementation of a Knock Detecting Door Lock System, aimed at enhancing security by eliminating traditional lock and key mechanisms. The proposed system utilizes an ESP32-based setup to detect specific knocking patterns, ensuring that only authorized individuals can unlock the door. The system addresses common security issues associated with key duplication and passcode vulnerabilities by relying on a personalized knocking sequence. Key features include the ability to set, and update knocking patterns, detect discrepancies, and maintain a balance between security and convenience. The hardware components include an ESP32, piezo sensors, and a servo motor, while the software is developed using the Arduino IDE. It can also incorporate two-factor authentication by generating a One-Time Password (OTP) when a valid knocking pattern is recognized. The OTP is sent to the user’s mobile device as an additional verification step before access is granted. By integrating the knock-based mechanism with the OTP feature, this system offers a robust, user-friendly solution that addresses both analog and digital security needs. The system’s innovative approach offers a cost-effective, efficient, and secure solution for modern door locking needs, with potential applications in various settings, including residential and commercial properties.