The Air Quality Monitor is a compact, ESP32-C3–based device designed to track and display key indoor environmental metrics in real time. At its core, it integrates the Sensirion SEN54 for particulate matter (PM1.0, PM2.5, PM4.0, PM10) and VOC index, alongside the SCD40 for precise CO₂, temperature, and humidity readings. A crisp 3.71" e-paper screen provides always-on, low-power visualization of air quality trends, making the data both easy to interpret and unobtrusive in any room.

Beyond the hardware, the project reflects a broader vision: enabling individuals to take control of their indoor environment through accessible, reliable sensing. With firmware built on the ESP32-S3, the platform supports flexible development in both Arduino and ESP-IDF, making it hackable and extendable for makers while robust enough for everyday use. Long-term, this monitor serves as the foundation for a connected ecosystem of health-centric IoT devices, combining practical engineering with sleek design and a focus on improving wellbeing in modern living spaces.

You can find the software and all other related files at the links below

(Note: the e-Paper display and SEN54 are external components that connect to the PCB)