Self-Learning Thermostat Kit with ESP32 + DHT22
Self-Learning Thermostat Kit with ESP32 & DHT22 — Your Boiler Learns When You’re Home
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Cold mornings and empty rooms shouldn’t trigger your boiler. This kit lets an ESP32 observe your household’s comings and goings over a week, then automatically fire the boiler only when and where warmth is needed — delivering comfort and genuine energy savings. Ideal for hill-station homes, farmhouses, or city apartments where heating schedules are unpredictable.
What You’ll Build
A standalone dual-zone thermostat that uses two DHT22 temperature/humidity sensors and two PIR motion sensors to track room occupancy. The ESP32 logs every movement and temperature reading to a microSD card with precise DS3231 RTC timestamps. After a learning period, the kit generates a weekly heating schedule on-device and drives a 4-channel relay to control your boiler — all live-monitored on a 0.96-inch OLED display. No cloud, no monthly fees.
What You’ll Learn
- Implementing occupancy pattern detection with PIR sensors and storing time-series data using a DS3231 RTC and microSD module
- Building a predictive heating schedule on ESP32 using simple on-edge algorithms — no internet or cloud required
- Interfacing multiple I2C (OLED, RTC, microSD) and one-wire (DHT22) devices without bus conflicts
- Designing a safe, relay-driven boiler control circuit with an LM2596 buck converter for reliable 3.3V/5V power from a 12V adapter
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| DHT22 | 2 |
| HC-SR501 PIR | 2 |
| 4-ch Relay Module | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| LM2596 Buck Converter | 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
Advanced makers and engineering graduates tackling real home automation challenges. B.Tech ECE/EEE final-year students building capstone IoT projects, Smart India Hackathon teams focused on energy efficiency, and professionals designing custom heating controllers for holiday homes in Shimla, Ladakh, or Coorg. If you’re comfortable soldering and reading schematics, this kit gives you a production‑grade learning thermostat without reinventing the wheel.
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 to chat with the AI companion trained on this kit; it understands every connection and code line. For more complex issues, we reply on WhatsApp within hours.
Can this thermostat control a 230V AC boiler safely?
Yes, the included 4-channel relay module is rated for 250V AC up to 10A, matching most domestic boiler circuits. The power-side uses a 12V adapter and buck converter for isolation — always have a licensed electrician check your final wiring.
Does the learning algorithm need internet access?
No. The ESP32 runs a lightweight pattern-detection routine on-device using PIR events and RTC timestamps stored on the microSD card. It builds and refines a weekly schedule offline, so your data never leaves the house.
I’m new to soldering — is this kit still for me?
This is an advanced project; you’ll be soldering headers, sensors, and relay terminals. The included 25W iron and solder are enough for the entire board, and the AI companion provides clear joint-by-joint images. If you’ve never soldered before, consider pairing this with our Beginner Soldering Kit first.
Records occupancy patterns over a week and learns a heating schedule. Controls boiler relay based on prediction + DHT22.
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