engleski

RSSI Performance of Maturity Sensor Based on LoRaWAN Network

This paper aims to evaluate the quality of wireless communication via LoRa protocol in maturity sensors BDM-1 of the author's design. The object of the study is the characteristics of continuity of a given measurement interval and the power of the data transmission signal. Experimental studies with immersion of a maturity sensor in a concrete sample and monitoring of its hardening temperature for 16 days were conducted. From 11 days of curing, the concrete sample was transported and held at different distances from the base station, divisible by a 30 m interval, in order to measure the signal strength of the data transmission. For this experiment, two trajectories for transporting the concrete sample in an urban environment were determined – with and without obstacles. The results of the monitoring confirmed the variability of the measurement intervals, as well as determined the signal strength at different distances and the signal range. Analysis of these results allowed expressing the relationship between the signal strength and distance for the maturity sensor BDM- 1, applicable in practice on construction sites.

LoRa ; IoT ; RSSI ; maturity sensor ; signal strength ; obstruction

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