Arduino Uno Meeting Room Air Quality Monitor Kit: CO2, Temperature, and Automatic Fan Control

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

Imagine walking into a meeting room that adjusts its ventilation automatically based on real-time CO2 levels and temperature. This kit lets you build that exact system — an Arduino-based monitor that reads CO2 from an MH-Z19B, temperature and humidity from a DHT22, displays values on an LCD, and triggers a relay to run an exhaust fan whenever air quality drops. It’s a practical solution for offices, schools, and any shared space in India where stale air kills productivity and makes discussions feel sluggish.

What You'll Build

You’ll assemble a standalone air quality monitor that displays CO2 concentration, temperature, and humidity on a 16x2 LCD screen. Once the CO2 exceeds a set threshold (say 1000 ppm) or the room gets too warm, the relay activates, turning on a connected exhaust fan. The system refreshes readings continuously, giving you a data-driven way to keep meeting rooms comfortable without relying on guesswork. You’ll end up with a working prototype ready to mount on a wall and demonstrate to colleagues, teachers, or hackathon judges.

What You'll Learn

• Interfacing the MH-Z19B NDIR CO2 sensor using UART and reading real-time CO2 data
• Reading DHT22 digital temperature and humidity sensor with Arduino libraries
• Controlling a 5V relay module to switch an AC exhaust fan — with flyback diode protection
• Displaying multiple sensor readings on a 16x2 LCD via I2C backpack for minimal wiring

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately