Predictive HVAC Pre-Cooling Controller Kit with ESP32 + DHT22
Predictive HVAC Pre-Cooling Controller Kit – ESP32 Learns Your Routine, Cools Before You Arrive
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Walk into a room that is already at the perfect temperature—without running the air conditioner all day. This advanced home automation kit puts an ESP32 at the core of a self-learning system. It logs temperature, humidity, and motion over days, builds an occupancy model, and activates relays to pre-cool your space exactly when needed, not a minute sooner.
What You'll Build
A complete predictive HVAC controller that uses three DS18B20 probes to monitor multiple zones, a DHT22 for humidity, PIR sensors for occupancy, and a microSD card for data logging. The ESP32 analyzes your patterns and triggers a 4-channel relay to cool only occupied areas, slashing energy waste while keeping comfort high.
What You'll Learn
- Implement on-device time-series prediction on ESP32 using collected sensor data
- Interface multiple digital sensors (DS18B20 one‑wire, DHT22, HC‑SR501) with a single microcontroller
- Design relay‑driven HVAC zone control with fail‑safe logic
- Log sensor history to microSD and display real‑time status on a 0.96‑inch OLED
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| DS18B20 Probe | 3 |
| HC-SR501 PIR | 2 |
| DHT22 | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 4-ch Relay Module | 1 |
| LM2596 Buck Converter | 1 |
| 0.96in OLED | 1 |
| 100nF Caps | 10 |
| 4.7kΩ Resistors | 5 |
| 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
Engineers and serious hobbyists tackling final‑year B.Tech ECE/EEE projects, Smart India Hackathon prototypes, or home lab automation. If you are at an IIT, NIT, VIT, or BITS campus and want a ready‑to‑assemble solution for occupancy‑based cooling, this kit gives you the hardware and the AI support to move fast—no need to hunt for reliable sensors or debug wiring for weeks.
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 launch your AI companion, which has been fed every step of this specific project. If you prefer a human, we're on WhatsApp with the same deep knowledge of the kit.
Do I need prior experience with AC wiring?
The relay module switches low‑voltage control signals. We provide clear schematics for all connections. If you plan to interface with a high‑voltage compressor or mains‑powered unit, have a qualified electrician verify your installation.
Will the prediction work without an internet connection?
Yes, the learning algorithm runs entirely on the ESP32 using logged data stored on the microSD card. No cloud or Wi‑Fi is required for normal operation after initial programming.
Can I adapt this for a split AC that uses an infrared remote?
You can. The relay outputs can be replaced with an IR LED (not included) connected to the ESP32. The companion guide covers the logic changes needed to send IR commands instead of relay pulses.
Learns daily schedule and pre-cools before arrival using occupancy history. DS18B20 + HC-SR501 + relay control.
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.
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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