Influence of Ventilation and Enclosure on Multi-Parameter Indoor Environmental Conditions: A BME680-Based IoT Study at Government Degree College, Rajendranagar

This study demonstrates that ventilation, enclosure and temporal variation produced distinct BME680 environmental-response patterns at Government Degree College, Rajendranagar. Temperature was influenced mainly by seasonal and diurnal changes, whereas relative humidity and atmospheric pressure showed comparatively limited spatial differentiation. The most consistent location-dependent response was observed for BME680 gas resistance, which followed the order Open Corridor > Open Room > Closed Room. The lower resistance in the more enclosed environment is consistent with a stronger MOX response to reducing gases and VOC-related mixtures under restricted air exchange. Because the BME680 gas element is non-selective and affected by environmental and sensor-operating conditions, gas resistance should be interpreted as a semi-quantitative indicator of relative VOC-related variability rather than as a direct VOC or TVOC concentration. Integration of BME680 sensing with ESP32, Wi-Fi and cloud visualization provides a practical low-cost framework for spatiotemporal indoor environmental surveillance and ventilation awareness. The approach supports sustainable-campus management and provides enabling alignment with SDGs 3, 4, 9, 11, 12 and 13. Future studies should incorporate reference VOC measurements, occupancy information, air-exchange measurements and longer-term monitoring to strengthen quantitative interpretation.  

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