Recently, security has become a critical need for any home or building. The Internet of Things (IoT) provides much convenience to people’s homes. In the past, most doors opened using traditional methods, such as keys, access cards, or passwords. However, it led to troubling accidents and problems such as losing the access card or the key. This project developed a facial recognition system based on (IoT) technologies to overcome these problems. The proposed study aims to build a real-time face recognition model using Raspberry Pi 4. The system achieves heightened security by sending a notification to the user’s mobile when an unauthorized person tries to access the building.