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ClimaPixel — Mini Weather Display

Language Hardware Sensor

ClimaPixel is a lightweight, real-time weather station powered by MicroPython. It reads temperature and humidity data from a DHT11 sensor and visualizes it on a 0.96-inch OLED display using custom-coded binary bitmap icons.

Features

  • Real-Time Monitoring: continuously updates temperature and humidity.
  • Custom Graphics: Features hand-coded binary bitmap icons for "Temperature" and "Humidity" (no external image libraries required).
  • Robust Error Handling: Includes try/except blocks to prevent crashes if the sensor disconnects.
  • Efficient Code: Uses bitwise operations to draw graphics, making it compatible with "Lite" versions of the SSD1306 library.

Hardware Required

  1. Microcontroller: ESP8266 (NodeMCU) or ESP32.
  2. Display: 0.96" I2C OLED (SSD1306 driver).
  3. Sensor: DHT11 Temperature & Humidity Sensor.
  4. Connecting Wires: Jumper cables.

Circuit Diagram & Pinout

Circuit Diagram

Based on the code configuration (main.py), connect your components as follows:

Component Pin Label Microcontroller Pin (GPIO)
OLED SDA GPIO 4 (D2 on NodeMCU)
OLED SCL GPIO 5 (D1 on NodeMCU)
OLED VCC 3.3V
OLED GND GND
DHT11 DATA GPIO 16 (D0 on NodeMCU)
DHT11 VCC 3.3V or 5V
DHT11 GND GND

Note: If you are using an ESP32, check your specific board pinout. You may need to change Pin(16) to a different GPIO if Pin 16 is restricted on your board.

How It Works

ClimaPixel — Mini Weather Display is a compact weather monitoring device that uses an ESP32/ESP8266 and a DHT11 sensor to measure temperature and humidity.
The collected data is displayed in real-time on an SSD1306 OLED screen along with graphical icons for better visual understanding.

Working Process:

  1. The DHT11 sensor measures ambient temperature and humidity.
  2. The ESP32/ESP8266 reads the sensor output in digital format.
  3. Data is processed and converted into Celsius (°C) and Relative Humidity (%).
  4. The OLED display continuously updates the readings on screen.
  5. Small icons (Thermometer & Humidity Drop) enhance UI clarity and aesthetics.

The system runs in a loop , constantly refreshing and displaying the latest weather information.

Future Enhancements

This project can be upgraded into a more advanced smart weather node.
Some recommended additions:

Feature Description
Wi-Fi Dashboard View sensor values live on a web server
MQTT IoT Integration Connect to Home Assistant, Blynk, ThinkSpeak, etc.
Data Logging Store readings in CSV/SD card for history/analysis
Fahrenheit Conversion Optional unit switching feature
Auto Screen Brightness Add LDR for dynamic brightness control
Battery Powered Convert into a portable wireless weather gadget
Deep Sleep Optimization Greatly improves battery life
Upgrade Sensor to DHT22 High accuracy & faster response
Temperature/Humidity Alerts Trigger buzzer/notification when limit crosses

With these upgrades, ClimaPixel can evolve into a fully functional IoT smart environment node.

Applications

Real-world use cases for ClimaPixel include:

  • Small home/room weather station
  • Desktop climate monitoring gadget
  • Greenhouse and smart agriculture monitoring
  • School/college IoT demonstration project
  • Server room humidity tracking
  • Air quality research and logging systems
  • Personal desk companion device
  • Pocket-sized portable environment tester

This project is ideal for students, hobbyists, and IoT developers looking to build compact weather hardware.

Author

Kritish Mohapatra
Third Year B.Tech, Electrical Engineering
Focused on IoT, Embedded Systems, and MicroPython Projects

⭐ If you like this project, give it a star on GitHub and follow for more IoT projects!