Office CO2 Tracker Pro Kit with Arduino Uno + DHT22
Breathe Easy at Work: Office CO2 Tracker Kit with Arduino Uno & Traffic Light Alert
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Your office might be making you drowsy—not because of a heavy lunch, but because CO₂ levels have crossed 1000 ppm. This kit helps you build a desktop air quality monitor that tracks CO₂, temperature, and humidity, and activates traffic-light LEDs to tell you exactly when to open a window. No more guessing, just healthier, sharper afternoons.
What You'll Build
A compact, battery-powered monitor that displays real-time CO₂ concentration, temperature, and humidity on a bright OLED screen. Green means fresh air, yellow warns you to ventilate soon, and red signals that it is time to act. Place it on your desk, in a classroom, or anywhere you need to know if the air is doing its job.
What You'll Learn
- Connect and calibrate an MH-Z19B NDIR CO₂ sensor to an Arduino Uno.
- Read temperature and humidity from a DHT22 sensor accurately.
- Display multiple sensor readings on a 0.96-inch OLED using I²C communication.
- Program traffic-light logic with custom thresholds to create a visual ventilation alert system.
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| MH-Z19B CO2 | 1 |
| DHT22 | 1 |
| 0.96in OLED | 1 |
| 5mm Red LED | 2 |
| 5mm Yellow LED | 2 |
| 5mm Green LED | 2 |
| 10kΩ Resistors | 5 |
| 220Ω Resistors | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 25 |
| 9V Battery Snap | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Suitable for young makers (10+) with adult guidance, CBSE Class 11–12 students exploring sensor-based projects, B.Tech ECE/EEE students preparing for internships or Smart India Hackathon, and working professionals curious about indoor air quality. ATL Tinkering Labs will also find it a ready-made activity to teach environmental science and coding.
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.
What if I get stuck during the build?
Scan the QR code on the box to access the AI companion. It’s trained on this exact project and can walk you through wiring, code, and calibration. For extra help, reach us via WhatsApp — we answer within the hour.
How does the traffic light LED alert system work?
The Arduino reads CO₂ concentration from the MH-Z19B sensor. Below 800 ppm the green LED glows, 800–1200 ppm triggers yellow, and above 1200 ppm lights the red LED. You can adjust these thresholds in the code for your own comfort.
Can I power it without a laptop?
Yes, the kit includes a 9V battery snap. Once you upload the code via USB, the tracker runs independently from a standard 9V battery, making it portable and desk-friendly.
Is this kit useful for a school science exhibition?
Absolutely. The real-time display and LED alerts make invisible CO₂ levels tangible. It demonstrates environmental sensing, programming, and health awareness — exactly what CBSE and ATL exhibitions look for.
Workplace Air — MH-Z19B CO2 and DHT22 on OLED. Traffic light LEDs show ventilation need.
What's in this kit
- Arduino Uno R3
- MH-Z19B CO2
- DHT22
- 0.96in OLED
- 5mm Red LED x2
- 5mm Yellow LED x2
- 5mm Green LED x2
- 10kΩ Resistors x5
- 220Ω Resistors x5
- 400-pt Breadboard
- M-M Wires x25
- 9V Battery Snap
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items