Smart Security Door System Using Raspberry PI And HMI

Security and efficient access management have become essential requirements in residential, commercial, and industrial settings.This paper proposes a Smart Security Door System developed using a Raspberry Pi and a Human-Machine Interface (HMI) to provide automated and controlled access.The system combines a Passive Infrared (PIR) sensor, touchscreenbased HMI, password authentication mechanism, servo motor, and buzzer within an integrated embedded platform.When the PIR sensor detects the presence of a person, the HMI is activated to allow password entry.The Raspberry Pi processes and verifies the authentication credentials, and upon successful verification, the door is unlocked through the operation of a servo motor.If multiple incorrect password attempts are made, the system activates a buzzer to alert users about a potential unauthorized access attempt.The developed prototype was tested under various operating conditions to evaluate its overall performance.Experimental observations showed dependable motion sensing, quick authentication, and effective door control while maintaining a relatively low implementation cost.The proposed system offers a practical, user-friendly, and scalable approach for applications such as smart homes, offices, laboratories, and other areas requiring controlled access.It also demonstrates the potential of Raspberry Pi-based embedded systems in developing intelligent and reliable security solutions.