Cost-Effective Electrical Power Control and Monitoring System  Using Hybrid Sensing Architecture over LoRaWAN

Jagraphon  Obma; Wittaya Wipratoom; Natpapha Chansom; Sitthisak Audomsi; Paanthong Sroymuk

doi:10.55674/ias.v15i1.265762

Authors

Jagraphon Obma Department of Computer Engineering, Faculty of Engineering, Rajamangala University of Technology ISAN Khonkaen Campus, Khonkaen, Thailand https://orcid.org/0000-0001-8984-2287
Wittaya Wipratoom Department of Computer Engineering, Faculty of Engineering, Rajamangala University of Technology ISAN Khonkaen Campus, Thailand
Natpapha Chansom Department of Mechatronics Engineering, Faculty of Engineering, Rajamangala University of Technology ISAN Khonkaen Campus, Thailand
Sitthisak Audomsi Department of Electrical Engineering, Faculty of Engineering, Mahasarakham University, Thailand
Paanthong Sroymuk Department of Mechatronics Engineering, Faculty of Engineering, Rajamangala University of Technology ISAN Khonkaen Campus, Thailand

DOI:

https://doi.org/10.55674/ias.v15i1.265762

Keywords:

Power Electricity, Control and Monitoring System, LoRaWan Technology, Internet of Things

Abstract

This research aims to a cost-effective electrical power control and monitoring system using hybrid sensing Architecture over LoRaWAN. The system employs a power measurement module (Pzem004t) to monitor the building's power consumption and a current sensor (ACS712-30A) to measure the electrical current of the equipment in use. The collected data is transmitted to an Arduino UNO R3 microcontroller, which is connected to an ESP32 microcontroller responsible for controlling the RFM95w module. Through the LoRa protocol, the system sends data to the CAT LoRa IoT gateway, enabling data visualization and control through a web application.In the experimental phase, the system effectively measures the energy consumption of electrical appliances and automatically responds when power consumption exceeds the specified limit. The system accurately displays total electric power consumption, power factor, total electricity cost, and voltage. Additionally, the system records the current values every minute. The experimental results demonstrated that the system operates effectively over a transmission distance of 5 km via the CAT LoRaWAN gateway. The measurement accuracy, when compared to a reference standard, showed an average discrepancy (error rate) of approximately 5.643%. In terms of control performance, the average response time (latency) for appliance shutdown commands was found to be in the range of 38.50 − 51.33 seconds, primarily due to the LoRaWAN Class A communication protocol limitations. However, it should be noted that the ACS712-30A sensor for each sub-load may have varying tolerance levels for the load's current, and transmitting the electrical control value may take more than one minute in certain cases.

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