  Internet of Things (IoT) has emerged with a motive to automate the human
life. It can be visualized as a network of connected things which is capable of
providing intelligent services. This paper presents an IoT based security
surveillance system in buildings using Raspberry Pi Single Board Computer (SBC)
and NodeMCU (WiFi/IoT module). This system comprises of wireless sensor nodes
and a controller section for surveillance. Intrusion detection with face
detection and recognition, fire detection, remote user alerts, live video
streaming and portability are the prime features of the system. The use of face
recognition feature in intrusion detection makes the system more efficient by
identifying the known and unknown person in restricted areas. WiFi module
processes the sensor based events and sends the sensor status to controller
section. Upon receiving the event notification, the controller enables the
camera for capturing the event, alerts the user via email, phone call and Short
Message Service (SMS) and places the live video of event on webpage. The use of
WiFi module makes the node compact, cost effective and easy to use. The biggest
advantage of the system is that the user can seek surveillance from anywhere in
the world and can respond according to the situations.
