“The Server Room Is What Temperature?!”

A custom-built temperature and humidity sensor with Wi-Fi, a full-color LCD display, and a built-in web interface. Designed for real-time monitoring in server rooms, labs, or anywhere environmental data matters.

“Accurate temperature tracking helps prevent overheating that can physically damage internal components or lead to degraded functionality.”

“Temperature is often quoted as the most important environmental factor affecting disk drive reliability.”

A smarter take on a classic DIY sensor:

Plenty of temperature and humidity sensors exist, but this one was built with real-world usability in mind.

My custom-built sensor unit combines wireless connectivity, live web reporting, and a full-color LCD display for quick, at-a-glance environmental monitoring. Designed for spaces like server rooms, workshops, or greenhouse environments, it doesn’t just log data — it makes it easy to access and act on it.

What sets this apart?

  • Full-Color LCD Display
    The built-in display shows temperature, humidity, IP address, and a customizable device name — all in real time.
  • Wi-Fi Connectivity
    Once connected to your wireless network, the unit continuously updates it’s sensor data via it’s web host.
  • Built-in Web Interface
    No cloud dependencies. Administrators can log directly into the device’s local web server via the unit’s IP address to check live environmental stats—no need to SSH or plug in a cable.

Under the hood

The main components in this project are a NodeMCU (ESP8266) microcontroller, and an inexpensive DHT22 sensor for both temperature and humidity readings. All code and build instructions are available on GitHub.