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This research presents the development of an air pollution meter using the MQ135 gas sensor and NodeMCU ESP8266 microcontroller. The sensor measures the concentration of harmful gases such as carbon dioxide, ammonia, and nitrogen oxides in the air, and sends the readings to the microcontroller. Using programming code, the raw readings from the sensor are converted to parts per million (PPM) values, which are more meaningful for air quality monitoring. The NodeMCU ESP8266 connects to a ThingSpeak server through Wi-Fi to transmit the PPM values in real-time. The server stores and displays the data on a graphical dashboard, allowing users to monitor air pollution levels in their vicinity. The project demonstrates the feasibility of low-cost and efficient air quality monitoring using readily available hardware and software tools. The results of the experiments show that the developed air pollution meter can provide accurate and reliable measurements of various air pollutants, thus contributing to environmental sustainability and public health.
Kaushalya Thopate (Mon,) studied this question.