AirLog: Personal Air Quality Monitor for Respiratory Health
Built by abdurrahmaanhasan0208
AirLog is a portable air quality monitor that tracks the four biggest indoor respiratory triggers; particulate matter (PM2.5/PM10), volatile organic compounds, CO2, and humidity and correlates them with user-reported symptoms on a phone app. It’s aimed at people with asthma, allergies, or unexplained respiratory issues who want to find out what’s actually triggering them. The device uses an ESP32 with Sensirion SPS30, SGP40, and SCD41 sensors in a 3D-printed enclosure with an active sampling fan. Data streams over BLE to a phone dashboard that logs exposure, flags spikes, and lets users tag symptoms for later correlation analysis. As a chemical engineering student, I’m focused on what most builds skip: sampling chamber design for proper airflow, cross-sensitivity correction between humidity and the VOC sensor, and converting raw readings into a meaningful exposure-based health index rather than just displaying numbers.