A Novel IoT-Enabled System for Real-Time Monitoring Home Appliances Using Petri Nets

Correct use of home appliances is intended to avoid property damage and life unsafety. Also, serious fire accidents can affect the safety of one's neighborhood. Therefore, this study uses the Internet of Things (IoT) platform to build an intelligent system that aims to detect the temperature rise of home appliances. It is employed to monitor the usage states of home appliances in real time. Hereby, the microcontroller, node microcontrol unit (NodeMCU-32S), is used to develop an IoT platform combined with sensors for measuring ac voltage, current, and ambient temperature so that the electrical power and temperature rise of load (e.g., electric motor) can be detected. Meanwhile, the smart measurement system is integrated with mobile devices to upload the detected datasets to the Google cloud database system. Moreover, the verification of feasibility and soundness of a system model is performed by using the Petri net tool, WoPeD, for the purpose of eliminating the improper states to optimize the system performance. Finally, the experimental results show that the proposed IoT-enabled system has a promising precision of 94.17% and a recall of 92.26%, which obviously outperforms other existing state-of-the-art systems.