Automate Meeting Room Air Quality with Arduino Uno, DHT22 & CO2 Sensor Relay 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.

Stale meeting room air kills focus. With this kit, you’ll build a wall-mounted monitor that reads CO₂, temperature, and humidity, then automatically triggers a fan and humidifier when conditions cross user-defined thresholds. It borrows the precision of mushroom fruiting environment controllers—where growers keep CO₂ under 800 ppm and humidity above 85%—and repurposes it for everyday indoor climate automation.

What You'll Build

You’ll assemble a full ventilation control unit. An Arduino Uno reads the DHT22 for temperature/humidity and the MH-Z19B for CO₂ ppm. A 0.96-inch OLED displays live readings. When the air gets too stuffy (high CO₂ or low humidity), the relay modules switch on a fan and a humidifier—both can be plugged into standard 5V or mains appliances via the relays. The trigger point matches the “mushroom fruiting” sweet spot, giving you a perfect lab for experiments in smart agriculture or simply a responsive meeting room air guardian.

What You'll Learn

• Reading digital sensors (DHT22, MH-Z19B) over I²C and serial protocols
• Programming Arduino to implement multi-threshold logic for automatic relay switching
• Driving 5V relay modules safely with flyback diodes and capacitive noise filtering
• Displaying real-time environmental data on an OLED and calibrating CO₂ baselines

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

CBSE Class 11–12 students exploring embedded systems and IoT will find a ready-made project for physics or computer science practicals. B.Tech ECE/EEE undergraduates can use it to prototype environmental control for Smart India Hackathon challenges. ATL Tinkering Labs and agriculture-focused clubs will appreciate the direct link to precision mushroom farming—the same relay logic applies to greenhouse automation.

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.