Office Occupancy Tracker Kit with ESP32 + Sensor
Build an Intelligent Office Ventilation System with the ESP32 Occupancy Tracker 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.
Imagine your office automatically adjusting fresh air intake when CO2 levels rise or occupancy increases—without any manual intervention. This advanced kit enables you to build a WiFi-connected monitor that triggers an Energy Recovery Ventilator (ERV) and logs air quality trends, tailored for the modern Indian workspace where energy efficiency and occupant comfort matter.
What You'll Build
A real-time occupancy and air quality monitoring system with an OLED display, microSD card logging, and relay control for ventilation. The device uses two PIR sensors to detect room occupancy, an MH-Z19B to measure CO2 concentration, and an MQ-135 for general air quality. When thresholds are crossed, a 4-channel relay activates an ERV fan. Timestamped data from the DS3231 RTC is stored on the SD card, letting you analyse patterns and optimise ventilation schedules.
What You'll Learn
- Wiring and calibrating electrochemical CO₂ and gas sensors (MH-Z19B, MQ-135)
- Programming ESP32 for multi-sensor fusion and threshold-based relay actuation
- Interfacing I2C OLED and SPI microSD modules for real-time display and local data logging
- Designing a practical IoT ventilation control system that reduces energy costs in offices
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| HC-SR501 PIR | 2 |
| MH-Z19B CO2 Sensor | 1 |
| MQ-135 Gas Sensor | 1 |
| 4-ch Relay Module | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| LM2596 Buck Converter | 1 |
| 100nF Caps | 10 |
| 10kΩ Resistors | 10 |
| PCB Prototype Board | 2 |
| Enclosure Box | 1 |
| 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
Ideal for B.Tech ECE/EEE final-year project students, IoT professionals, and smart-office consultants who want a integrated solution for air quality monitoring. Also fits Smart India Hackathon hardware tracks, ATL Tinkering Lab mentors guiding advanced builds, and DIY makers designing automation for co-working spaces.
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 included in the box to chat with the AI companion specifically trained on this kit. You can also message us on WhatsApp for direct human help.
Do I need prior experience with ESP32 and sensors?
Yes, this kit assumes familiarity with Arduino IDE, basic breadboard wiring, and sensor calibration. The AI companion provides detailed step-by-step guidance, but foundational electronics knowledge is recommended.
Can the kit control a real ERV in my office?
Absolutely. The 4-channel relay can switch a 230V AC fan or an ERV unit safely. We advise consulting an electrician for the mains wiring portion.
Where is the air quality data stored?
Timestamped sensor readings (CO2, air quality index, occupancy) are logged directly to the microSD card in CSV format. You can later push data to the cloud via the ESP32's WiFi if you wish to extend the project.
Office — PIR occupancy + MH-Z19B CO2 + MQ-135 air quality auto-trigger relay-controlled ERV ventilation and log air quality trends.
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