Uso de sensores de baixo custo, anexos a coletes, para medir parâmetros de qualidade do ar, enviando dados para a nuvem monografia apresentada ao instituto federal

Abstract

This work proposes the development of a low-cost prototype for monitoring air quality in urban environments, using sensors attached to a vest. The device is capable of simultaneously measuring the concentration of polluting gases (NH₃, CO₂, NO₂), meteorological variables (temperature, pressure, and humidity), and geographic coordinates, sending the collected data to the cloud in real-time. For this purpose, the ESP8266 NodeMCU WiFi module, the MICS-6814 gas sensor, the BME680 environmental sensor, and the NEO-6M V2 GPS module were used. The prototype was tested in different urban conditions, demonstrating the ability to identify significant variations in pollutant concentrations in areas with different traffic levels. The results indicate that the device can be an effective tool for environmental monitoring, providing crucial data for the implementation of public health policies and urban planning. However, limitations related to sensor calibration and body heat interference were identified, suggesting the need for future adjustments to improve the system's accuracy and reliability.