IoT (Internet of Things) technology, the core technology of the 4^th industrial revolution, is currently being applied to various fields. Among them, the most basic application is the security system. The security system automatically detects a moving object or person approaching a restricted area, and if the object or person moves, it can immediately take a picture and store it. By taking a picture and storing it, you can recognize what the moving object is and who it is if it is a person. You can open the door by checking who it is, and you can also find out what time someone came. In this paper, we propose a smart home security system based on Raspberry Pi 4.

IoT, Raspberry pi 4, camera, PIR sensor, smart home, security

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