Build a Real-Time CO2 & Air Quality Monitor with Arduino Uno – Smart Home Hub Kit

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

This kit transforms raw sensor data into a meaningful, at-a-glance air quality score right on your desk. You’ll combine an infrared CO₂ sensor, a broad-spectrum gas sensor, and a precision temperature/humidity module to build a monitoring station that doesn’t just display numbers—it tells you whether the air you're breathing is healthy, and what to do about it.

What You'll Build

A self-contained desktop air quality hub that continuously reads CO₂ levels from the MH-Z19B, VOCs and smoke from the MQ-135, and ambient temperature/humidity from the DHT22. The Arduino Uno fuses these inputs into a single, intuitive air quality score shown on a 1.8-inch color TFT alongside icons and plain-language recommendations like “Ventilate Now” or “Ideal Air”. By the end, you’ll have a calibrated, deployable device ready to monitor your classroom, bedroom, or makerspace.

What You'll Learn

• Calibrate and read an infrared CO₂ sensor (MH-Z19B) over UART serial communication
• Read and compensate an analog MQ-135 gas sensor with temperature/humidity cross-sensitivity correction
• Design a composite air quality index algorithm that merges multiple sensor readings into a health-relevant score
• Render dynamic graphics, text, and icons on a TFT display using the ST7735 library

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

CBSE Class 11–12 students exploring environmental sensing, B.Tech ECE/EEE students working on smart home prototypes, and Smart India Hackathon teams tackling air quality challenges will all find this kit immediately useful. It also fits ATL Tinkering Lab modules and hobby clubs at IITs, NITs, VIT, and BITS where sensor fusion and display integration are core learning goals.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We’ve spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.