Server Room Temperature Monitor Pro Kit with Raspberry Pi 4 + DHT22
Build a Server Room Temperature Monitor and Relay Controller with Raspberry Pi 4
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
In a data centre or server room, overheating silently destroys hardware and causes unexpected outages. This kit turns a Raspberry Pi 4 into a complete environment watchdog — it reads temperature and humidity from a DHT22 sensor, plots live charts in a Node-RED dashboard, and switches cooling equipment via a 4-channel relay, all accessible from your phone over local WiFi. It’s the same approach used by IT teams to monitor racks, now in a learn-by-building format.
What You'll Build
A browser-based dashboard that displays real-time temperature and humidity gauges, scrollable history graphs, and relay status indicators. You can manually toggle each relay or let automatic rules kick in when temperature crosses a threshold. The DHT22 mounts inside a cabinet or near server intakes, and the relay module controls fans, blowers, or even an AC contactor. The entire interface is optimized for phone screens, so you can check conditions from anywhere on the same network — ideal for small data centres, server closets, or even a home lab rack.
What You'll Learn
- Flashing Raspberry Pi OS and installing Node-RED from scratch
- Wiring and calibrating the DHT22 digital temperature/humidity sensor
- Integrating a 4-channel relay module to safely switch high-power cooling loads
- Designing a responsive dashboard UI that updates live on any smartphone browser
Kit Contents
| Component | Quantity |
|---|---|
| Raspberry Pi 4 Model B 2GB | x1 |
| DHT22 | x1 |
| 4-ch Relay Module | x1 |
| 1N4007 Diode | x5 |
| 4.7kΩ Resistors | x5 |
| 40-pin GPIO Header | x1 |
| M-F Wires | x20 |
| MicroSD Card 32GB | x1 |
| USB-C PSU | x1 |
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
Engineering students building Smart India Hackathon prototypes, B.Tech ECE/EEE lab projects, and Atal Tinkering Lab mentors will find real industrial application here. It’s also perfect for IT graduates setting up home server racks or M.Tech researchers needing a quick, reliable monitoring node for test environments.
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 start a chat with the AI build companion. It knows every wire and Node-RED node for this kit. If you still need help, our engineers are available on WhatsApp.
Can I access the dashboard from outside my local network?
The project is designed for local WiFi, but you can later set up port forwarding on your router or use a secure tunnel service. The core learning covers all the skills needed to add remote access.
Does the relay module directly control server fans?
Yes, the 4-channel relay can switch 230V AC loads up to 10A, which is adequate for most cooling fans or blowers. Always get help from a qualified electrician if you are new to mains wiring.
Is this suitable for a CBSE Class 12 project?
Absolutely. It demonstrates IoT, data logging, and automation — topics that align closely with the CBSE Computer Science and Physics curricula and stand out at school exhibitions.
Data Centre — Pi 4 Node-RED dashboard controls GPIO relays and reads DHT22. Accessible from phone on local WiFi.
What's in this kit
Other projects you can build
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