Office Occupancy Tracker Kit – Automate HVAC Pre-Conditioning with ESP32, PIR, and CO2 Sensor

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

Empty meeting rooms and unused cabins still run air conditioning for hours. This kit lets you build a compact ESP32 device that learns occupancy patterns from motion and CO2 levels, then activates a relay to pre-condition HVAC only when a room is about to be used — slashing energy waste in offices, schools, or any shared space.

What You'll Build

You assemble a wall-mounted or desk-placed sensor node. It reads PIR motion, CO2 concentration (via MQ135 as a proxy), and ambient temperature/humidity. The ESP32 runs a simple logic to decide whether the room is occupied or about to be occupied, and accordingly toggles a relay that represents an HVAC control signal. The prototype is a fully functional demonstration of predictive climate control for energy‑conscious buildings.

What You'll Learn

• Interface HC-SR501 PIR, MQ135 CO2 proxy, and DHT22 with ESP32 and read real-time data
• Write occupancy detection code that fuses motion, CO2 rise rates, and temperature patterns
• Control a 5V relay to simulate turning an HVAC contactor on or off
• Understand the energy‑saving principle of pre-conditioning: conditioning only when occupancy is predicted, not continuously

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This beginner kit fits CBSE Class 11–12 students exploring IoT-based physics or computer science projects, ATL Tinkering Lab teams prototyping energy‑saving devices, and first‑year B.Tech ECE/EEE students who need a hands‑on ESP32 sensor‑actuator assignment. Smart India Hackathon participants will also find it a fast starting point for occupancy‑driven automation prototypes.

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.