Integration of multi-sensor system for IoT-based smart home application

Abstract

The use of the Internet of Things (IoT) is growing rapidly in recent years, including a smart home system. One of the biggest challenges of a smart home system is to integrate various sensors into one system that works simultaneously. In this paper, we propose a centralized architecture to connect and manage data from different types of sensor systems as it allows for more cost-efficient implementation. We employ various sensors based on key features needed to monitor house status which are flame sensors, gas sensors, temperature sensors, and magnetic switches. Those sensor systems are centrally integrated to a main controller which consists of Arduino Mega and Node MCU. This controller is responsible to manage sensor scanning and feed the data into a server, which can then be accessed by the user via a web-based application. Additionally, the user can get a push notification if the system detects dangerous conditions in the house, like overheating, leaked gas, fire, or theft. We created a smart home prototype to test our proposed architecture. We verify the system by running several scenarios of house status and measuring delay from the time when a user send a command until the corresponding task is finished. The result shows that our approach is able to simultaneously manage thirteen sensors with the average delay of 6.31s.