# AQI Monitor

Day 59 of the 100 Days 100 IoT Projects collection. Board: ESP32.

MQ135, MQ7, and a PM2.5 sensor feed an ESP32 air-quality dashboard built with Flask. Know exactly what you are breathing.

## How it works

Three different sensors — MQ135 and MQ7 for gases plus a PM2.5 particulate sensor — feed the ESP32 a full picture of the air. A Flask dashboard combines them into one air-quality view, so you see gases and particles side by side instead of guessing from a single number.

## What you'll learn

- Multi-pollutant sensing
- AQI computation
- Particulate matter sensing
- Composite environmental dashboards

Full project (code, wiring diagram, Wokwi simulation): https://github.com/kritishmohapatra/100_Days_100_IoT_Projects/tree/main/AQI_ESP

Summary by SkillShop. Code and diagrams belong to the original repo.