Server Room Temperature Monitor Pro Kit with ESP32 + Relay
ESP32 Server Room Temperature Monitor & Relay Control Kit — MQTT Enabled
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Keep your server rack from overheating while you’re away. This kit lets you build an ESP32-powered monitor that measures temperature and humidity, then drives relays to switch fans, AC units, and indicator lights — all from a single MQTT dashboard on your phone or laptop. Whether it's a home lab, school server room, or a small data centre, you’ll have real-time climate control without manual intervention.
What You'll Build
A self-contained monitoring node that reports DHT22 readings to an MQTT broker and reacts to commands. Mount it in a server cabinet to auto-start cooling fans when temperature crosses a threshold, toggle AC relays, or lock a server room door — all controllable from any MQTT client like Node-RED, Home Assistant, or a custom app. The OLED display shows live readings and relay status locally.
What You'll Learn
- Program an ESP32 in the Arduino IDE to read precise temperature and humidity data from a DHT22 sensor
- Publish sensor readings and subscribe to control topics via MQTT, enabling two-way communication with a broker
- Drive a 4-channel relay module safely to switch AC fans, air conditioners, and electromagnetic locks
- Implement hardware protection using flyback diodes and decoupling capacitors to shield the microcontroller from relay surges
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| 4-ch Relay Module | 1 |
| DHT22 | 1 |
| 0.96in OLED | 1 |
| 1N4007 Diode | 5 |
| 4.7kΩ Resistors | 5 |
| 100nF Caps | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| Micro USB Cable | 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 Class 11–12 students exploring IoT as part of their electronics curriculum, first-year B.Tech ECE/EEE students building a mini-project, and participants of the Smart India Hackathon who need a reliable server room monitoring solution. Also suited for ATL Tinkering Lab mentors teaching MQTT and industrial automation, as well as NIT/VIT/BITS makers assembling a home server environment.
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 on the box to chat with the AI companion, which knows every wire and line of code for this kit. If you need a human, our WhatsApp support line is staffed by engineers who worked on the project.
Can I control AC mains appliances safely with this kit?
Yes, the 4-channel relay module handles 250V 10A loads, and we include 1N4007 flyback diodes and decoupling capacitors to protect the ESP32. Always follow the wiring diagram in the included build guide.
Do I need a physical MQTT broker, or can I use a cloud service?
You can use any MQTT broker — a local Raspberry Pi running Mosquitto, or a free cloud broker like HiveMQ Cloud or Adafruit IO. The ESP32 code is pre-configured to connect via Wi-Fi, and you change the broker address in one line.
What if I want to add more sensors or relays later?
The ESP32 has plenty of spare GPIOs. The breadboard and extra wires make expanding easy. Our AI companion can help you modify the code to add, for example, a flame sensor or extra temperature points.
Data Centre — ESP32 MQTT controls lights, fan, AC relay and lock from any MQTT client app.
What's in this kit
- ESP32 Dev Board
- 4-ch Relay Module
- DHT22
- 0.96in OLED
- 1N4007 Diode x5
- 4.7kΩ Resistors x5
- 100nF Caps x5
- 400-pt Breadboard
- M-M Wires x20
- Micro USB Cable
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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