ESP32 Occupancy Prediction HVAC Kit – Build Your Own Energy-Saving Smart Node

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

Picture a classroom or office where the AC turns on only when the room is about to fill up—cutting waste without anyone touching a switch. This kit lets you assemble a node that reads PIR motion and CO₂ patterns, then uses a simple prediction logic to toggle a relay controlling an HVAC unit. It’s a hands-on introduction to energy-aware IoT, perfect for school projects, hackathons, or experimenting with smart building ideas.

What You'll Build

You’ll wire an ESP32 to a PIR sensor, a MQ135 air-quality sensor, and a DHT22 for temperature/humidity context, then program it to detect occupancy trends. The device predicts when a room will be occupied based on rising CO₂ and recent motion, and activates a 5V relay to start the HVAC just in time. The result is a compact, wall-mountable prototype that demonstrates how predictive automation can slash energy bills.

What You'll Learn

• Interface multiple sensors (PIR, MQ135, DHT22) with the ESP32 via GPIO and ADC
• Calibrate the MQ135 CO₂ proxy reading and interpret air-quality changes
• Implement a basic occupancy prediction algorithm (moving average, threshold logic)
• Control a 5V relay to switch an external load like a fan or AC signal line

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This is built for CBSE Class 11–12 students tackling physics or computer science projects, first-year B.Tech ECE/EEE learners exploring IoT, and ATL Tinkering Lab enthusiasts who want a real-world energy challenge. It’s also a solid choice for Smart India Hackathon prototypes where sensor-based automation meets sustainability.

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.