Application of LoRaWAN-based System for Electric Energy Monitoring and Data Acquisition in a Smart Building
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Abstract
The Internet of Things (IoT) sensors based on low-power wide-area network technologies have been emerged suitable for the implementation of instruments and measurement systems on a conventional electric meter to develop additional smart meters for distribution transformers, smart factories, and smart buildings. LoRaWAN (Long Range Wide Area Network) can be one of the key promising LPWAN technology as a suitable IoT network connectivity for smart electric metering that offer long-range connectivity, unlicensed frequency, and low cost of deployment. This work presents a smart energy meter based on LoRaWAN to monitor and manage the energy consumption in a smart building. It was conducted by using several LoRa sensor nodes (Energy meter with LoRa module) placed in different floors with a single multichannel LoRaWAN gateway. To evaluate the performance of the proposed system, received signal strength indicator (RSSI), signal-to-noise ratio (SNR) and packet delivery ratio (PDR) were measured and calculated. An average RSSI levels of –110 to –33 decibel-milliwatts were obtained from the same floor and the farthest floor of the sensor node with respect to the gateway, meanwhile the highest SNR is 12.08 decibel and the lowest SNR is –5.28 decibel. The measured results show that a single 8-Ch gateway can cover the 8-floor building with more 80% packet delivery ratio. Actual performance and network coverage using LoRaWAN exceeds expectation for all test locations. It is through the analysis of the RSSI, SNR and PDR for LoRaWAN network performance metrics, therefore, applying monitors and manages that increase the robustness and reliability of the smart energy monitoring system.
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