Avaliação de desempenho do sensor de baixo custo AM2302 para monitoramento climático na Amazônia

Abstract

Environmental monitoring is essential for understanding climate variations and their impacts, requiring reliable and affordable sensors for data collection. Therefore, the objective of this study was to validate the consistency of environmental data obtained by a low-cost sensor, comparing them with information from reference systems. In this study, air temperature (ºC) and relative humidity (%) data found throughout 2023 from the low-cost AM2302 sensor used in the monitoring kit of the Pilot Network for Innovation in Air Quality Monitoring in the Western Region of Pará – Air Caretakers, from the National Environmental Data Organization System (SONDA) and data from the National Institute of Meteorology (INMET) were used. To evaluate the relationship between adverse variations in different locations, the Simple Linear Regression statistical technique was applied. The results showed some variations in relation to the reference sensors (INMET and SONDA); however, the AM2302 follows the general trend of environmental variations over time. Seasonal analysis confirmed its ability to capture climate patterns, such as falling temperatures and rising humidity during the rainy season. Statistical analyses indicated significant correlations (<0.05), especially for temperature, while humidity showed greater influence from external factors. Despite its limitations, the AM2302 demonstrates potential for low-cost environmental monitoring. Given the lack of official railway stations in the region, the study highlights the importance of strategies to minimize discrepancies and improve the use of these sensors in indirect research.