IoT Based Home Security System

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&nbsp;Internet of Things (IoT)-enabled intelligent systems are proliferating rapidly, providing the capability to connect virtually any device to the Internet. Consequently, this concept can be effectively utilized in home security applications. In this paper, we have introduced an IoT-enabled system designed to send security alerts to users via email upon detecting human intrusion. The system comprises a PIR sensor, Pi camera, Raspberry Pi-3, and an Internet connection. There are two operational modes in the proposed security system. In the first mode, movement by an intruder is detected, and simultaneously, every time someone rings the doorbell, the Pi camera captures an image. The system then accesses a stored database to ascertain whether the individual is recognized. If the person is unfamiliar, the user receives an email notification, including the captured image of the individual. On the other hand, if the person is recognized, the system stores the captured image. In the second mode, when someone exhibits suspicious behaviour in front of the door, the system sends an alert email to the user, prompting them to activate the security alert system installed at the entrance. For face detection, we employ the Haar cascade technique. Face recognition involves two steps: feature extraction and classification. In the feature extraction phase, we compare various algorithms, and a comparative study of these provides a methodology that achieves 99.56% accuracy, outperforming other existing models. The developed system leverages the IoT platform to fortify security against intruders, thereby fostering a safe and secure environment.<br>