Classroom CO2 Monitor Kit with ESP32 + DHT22
Classroom CO2 Monitor Kit: Air Quality Monitoring with ESP32-C6, DHT22, and Matter
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 lets you build a classroom air quality monitor that tracks CO2, temperature, and humidity. The ESP32-C6 acts as a tiny Matter hub, exposing sensor data to any Matter-compatible smart home system—ideal for monitoring ventilation in schools, maker spaces, or home offices. Once assembled, the OLED display shows real-time readings, and the device can be integrated into Apple Home, Google Home, or other Matter ecosystems.
What You'll Build
A compact, wall-mountable monitor that continuously measures CO2 concentration, temperature, and humidity. It displays values on a 0.96-inch OLED screen and broadcasts them as Matter sensor accessories. You’ll have a functional tool for checking classroom ventilation—critical for maintaining focus and health—or for broader smart home air quality tracking.
What You'll Learn
- How to solder surface-mount and through-hole components on a prototyping board
- Reading sensor data from DHT22 (digital) and MH-Z19B (UART) with an ESP32-C6
- Configuring the ESP32-C6 as a Matter accessory device and pairing it with a Matter hub
- Programming an OLED display using I2C to show real-time environmental data
Kit Contents
| Component | Quantity |
|---|---|
| ESP32-C6 Dev Board | 1 |
| DHT22 | 1 |
| MH-Z19B CO2 | 1 |
| 0.96in OLED | 1 |
| LM2596 Buck Converter | 1 |
| 4.7kΩ Resistors | 5 |
| 100nF Caps | 5 |
| ABS Enclosure Box | 1 |
| PCB Prototype Board | 2 |
| 5V 2A PSU | 1 |
| Soldering Iron | 1 |
| Solder Wire | 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
This kit is designed for senior school students (Class 11-12, CBSE/ICSE), B.Tech ECE/EEE undergraduates exploring IoT, and participants of Smart India Hackathon or ATL Tinkering Labs focusing on health and sustainability. It gives a full-stack learning experience—from soldering and hardware integration to modern Matter smart home protocols—skills directly applicable to real-world embedded systems.
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 an AI companion trained on this exact project, or reach out on WhatsApp for backup support.
Does this kit require a Matter-compatible smart home hub?
Yes, to use the Matter accessory feature you need a Matter controller like Apple HomePod, Google Nest Hub, or an ESP32-based Matter hub. The OLED display works independently for local monitoring.
Is the MH-Z19B CO2 sensor pre-calibrated?
The sensor comes with factory calibration; it takes a few minutes to stabilize and deliver accurate readings.
Can I deploy multiple kits across classrooms and view data centrally?
Each monitor exposes its data via Matter, which a home hub can aggregate. For custom central dashboards, you can extend the ESP32 firmware to send data via Wi-Fi or MQTT.
School Ventilation — ESP32-C6 exposes temperature, humidity and CO2 as Matter sensor accessories. Tiny hub for whole home.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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