This project builds a real-time air quality monitoring system using an ESP32 microcontroller paired with environmental sensors. The monitor displays particulate matter (PM2.5, PM10), temperature, and humidity readings on a local display or sends data to a cloud service for remote tracking.
The guide includes a complete parts list, wiring diagram, and step-by-step assembly instructions. Firmware code handles sensor communication, data processing, and display updates. Builders will learn how to integrate multiple sensors with the ESP32, configure WiFi connectivity, and create a functional environmental monitoring device.
Wiring diagram
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