DIY 3D-Printed Mini Weather Station 🌦

DIY 3D-Printed Mini Weather Station using Wemos D1 Mini

Monitoring your room’s temperature and humidity doesn’t have to be boring — or expensive. With a bit of 3D printing and some simple electronics, you can create your own portable weather station that looks great on your desk and runs on a rechargeable battery.

This DIY weather station is built around the Wemos D1 Mini (ESP8266) and displays live readings from a DHT11 sensor on a 0.96" OLED display. A compact 3D-printed case (base + top cover) makes it look like a professional gadget.

🧰 Components Required

3D Printed Parts

• 🖤 Base Part (with slots for Wemos Mini, battery, TP4056, OLED)
• ⚪ Top Cover Part (with a slot for DHT11 sensor)

Electronics

• 1 × Wemos D1 Mini (ESP8266)
• 1 × DHT11 Temperature + Humidity Sensor
• 1 × 0.96-inch OLED Display (I2C)
• 1 × Li-ion Battery
• 1 × TP4056 Charging Module
• Jumper wires (female) for connections
• Screws + screwdriver

📂 Download 3D Print Files

This project needs two 3D printed parts:

• 🖤 Base Part
• ⚪ Top Cover
• 📥 Looking for the STL files?Drop me a quick DM on Instagram @electro__dude and I’ll send you the download link right away! or click here

⚠️ Print Tips:

• Print the base in black PLA/ABS (for strength).
• Print the cover in white PLA (for a clean, minimal look).
• 🛠️ Step-by-Step Assembly

Step 1: Placing the Wemos D1 Mini 🧠

Take the 3D-printed base and insert the Wemos D1 Mini into its dedicated slot.

Make sure it sits firmly and that the USB port is accessible for programming later.

This board is the “brain” of the weather statio

Step 2: Adding the OLED Display 📟

Take the 0.96-inch OLED and carefully insert it into the OLED slot on the base.

• Handle the display gently as the screen is fragile.
• Align it properly so it faces outward for clear visibility.

Step 3: Installing the Battery + TP4056 🔋

Now we’ll set up the power system.

Solder the battery wires to the TP4056 charging module:

• Battery + → TP4056 B+
• Battery – → TP4056 B-

Insert both the battery and TP4056 into their dedicated slots inside the base.

Make sure the TP4056’s micro-USB port is accessible for easy charging.

Step 4: Preparing the DHT11 Sensor

• The DHT11 sensor will be mounted on the top cover.
• Before placing it into the cover slot, solder female jumper wires to its pins (VCC, GND, Data).
• This makes it easy to connect later to the Wemos Mini.
• Once soldered, insert the DHT11 into the slot on the top cover, ensuring the sensor head is exposed for accurate readings.

Step 5: Circuit Connections 🔗

Now connect everything together as per the circuit diagram:

DHT11 → Wemos Mini

• VCC → 3.3V
• GND → GND
• Data → D4 (GPIO2)

OLED → Wemos Mini (I2C)

• VCC → 3.3V
• GND → GND
• SDA → D2 (GPIO4)
• SCL → D1 (GPIO5)

Battery → TP4056 → Wemos Mini 5V

Step 6: Programming the Wemos D1 Mini 💻

Connect your Wemos D1 Mini to your computer via USB.

Open Arduino IDE.

Install the required libraries:

• Adafruit Unified Sensor
• DHT sensor library
• Adafruit SSD1306 (for OLED)

Load the code from my GitHub (https://github.com/souravmahari/-DIY-3D-Printed-Mini-Weather-Station-/tree/main)

Select Wemos D1 Mini as the board and hit Upload.

After uploading, the OLED will display live temperature & humidity readings from the DHT11 sensor.

Step 7: Closing the Box 🔧

Finally, align the top cover with the base and fix it using screws.

Ensure all wires are neatly placed inside.

The DHT11 should be exposed through the cover slot for accurate sensing.

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Step 8: Power ON 🚀

Flip the switch (or connect via USB) and your Mini Weather Station comes alive!

The OLED will show temperature (°C) and humidity (%).

You can recharge it anytime using the TP4056 port.Step 8: Power ON 🚀Flip the switch (or connect via USB) and your Mini Weather Station comes alive!The OLED will show temperature (°C) and humidity (%).

🌍 Applications

• Monitor room temperature & humidity
• Use as a desktop gadget
• Portable battery-powered mini weather station
• Educational project for learning IoT & sensors

🔮 Future Work

This project can be upgraded in many exciting ways:

• 📶 Send weather data to a cloud server / mobile app
• 📊 Log readings over Wi-Fi for long-term monitoring
• 🎙️ Integrate with Alexa / Google Home to ask “What’s the room temperature?”
• ☀️ Add more sensors (BMP280 for pressure, LDR for light, etc.)

🎯 Conclusion

With just a few components, a 3D-printed enclosure, and some simple coding, you can build a miniature weather station that looks professional and works reliably. It’s a fun way to learn about IoT, sensors, and 3D design while making something practical for everyday use.

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🚀 Keep building, keep experimenting, and keep glowing.Your next great idea is just a print away. 💫