Classroom CO2 Monitor Kit with Arduino Mega + DHT22
Classroom CO2 Monitor Kit with Arduino Mega + DHT22 – Precision Climate Control for Smart Agriculture Projects
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 your bench into a working model of a poultry shed's environmental controller. You'll wire multiple sensors to an Arduino Mega, read CO2, temperature, humidity and ambient light levels, then use relays to activate ventilation fans, heaters and lighting exactly as a real flock management system would, all governed by an RTC-based age schedule. Ideal for agriculture engineering students, Smart India Hackathon teams and university IoT labs exploring precision farming.
What You'll Build
A fully self-contained climate monitoring and actuation station. The 0.96-inch OLED displays live sensor values, the MicroSD module logs historical data, and the four-channel relay module drives external loads—simulating fan, heater and light control. The DS3231 RTC allows you to program different temperature and CO2 thresholds for different times of day or flock ages, mimicking real-world poultry farm automation.
What You'll Learn
- Calibrate and read high-accuracy CO2 concentration using the MH-Z19B NDIR sensor over UART
- Interface dual DHT22 sensors for redundant temperature and humidity monitoring
- Implement I2C communication for the BH1750 lux sensor and OLED display
- Design relay logic with time-based scheduling using the DS3231 RTC and Arduino Mega
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| DHT22 | 2 |
| MH-Z19B CO2 | 1 |
| BH1750 | 1 |
| DS3231 RTC | 1 |
| 4-ch Relay Module | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 10kΩ Resistors | 10 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| 12V Adapter | 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
B.Tech Agriculture Engineering and ECE students building final-year projects on precision livestock farming. Smart India Hackathon teams prototyping climate-smart poultry solutions. CBSE Class 12 students with electronics elective and ATL Tinkering Labs looking for a high-complexity sensor integration challenge. University labs at IIT, NIT, VIT and BITS running IoT in agriculture workshops.
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 inside the box to chat with the AI companion, which has full knowledge of wiring, code and calibration steps. You can also send a photo on WhatsApp for human guidance if needed.
Can this system be used in a real poultry shed?
The onboard sensors and relays are suitable for small-scale prototypes. For a production environment, you would need to add higher-rated contactors and industrial enclosures, but the core logic and sensor array remain directly applicable.
Does it include the Arduino code?
Yes, the AI companion provides modular, well-commented code for reading all sensors, writing to SD, updating the OLED, and controlling relays based on the RTC schedule. You can adapt it easily.
What if a sensor is damaged during soldering?
We include two PCB prototype boards and clear thermal guidelines. If a component arrives faulty or gets damaged within 7 days, we'll ship a free replacement inside India.
School Ventilation — Temperature, humidity, CO2 and lux all monitored. Relays control ventilation fan, heater and lighting per flock age schedule.
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