The relation of LoRaWAN efficiency with energy consumption of sensor node

Abstract

This paper presents the study of the various factors of LoRaWAN or LPWAN (Low power wide area network), that affect energy consumption compared to the efficiency of sensor nodes such as the transmitting and receiving data, the distance of transmission, and stability. The experiment efficiency of sensor node system by focuses on two parts. The first part, considered the node’s communication. We connected sensor node 3 nodes with LoRa base station and operating communication test for 7 days using the sensor node, which purpose to measurement and monitor of soil moisture, temperature, and humidity. Then setting and varying 3 communication parameters namely such as SF (spreading factor), CR (coding rate), d (distance). When any variable is adjusted, other variable is remaining constant. Finally, energy consumption was analyzed with each of variable to determine the suitability for different environments. When SF is high the power consumption is high, which is the highest SF value is 11. When the CR is low the power consumption is high, the lowest CR is 4/8. The second part, we measuring factor of packet’s communication, which is following to the LoRa protocol standard. Which the power consumption 73.29 mW/H. From experiment test, the soil moisture sensor nodes have a battery node’s lifetime is 6 days and 3 hours. in addition, maximum distance to communication of the soil moisture sensor node is 226m, with RSSI -116 dBm.