This document describes an IOT based home visitor monitoring system using a Raspberry Pi. The system uses a Raspberry Pi single board with Wi-Fi connectivity. A camera detects faces at the door and captures images, which are processed using local binary pattern histograms for face recognition. If an unrecognized face is detected, a video is captured and streamed to a webpage using RTSP protocol. This allows remote users to view the live video stream through a web browser on their android mobile phones. The system aims to provide a low-cost and effective home security and surveillance solution using Raspberry Pi and IOT technologies.