Hey everyone, I’m really excited to share my recent project where I integrated a CO2 sensor with an LED strip to visualize air quality in real-time. I’ve been experimenting with smart home technology for a while now, and this project has been a fun challenge!
I started with a D1 Mini microcontroller, paired with an SCD41 CO2 sensor and a BME680 for temperature and humidity readings. The LED strip, using WS2811 pixels, was the perfect addition to make the data visually accessible. My goal was to have the LEDs change color based on CO2 levels, providing a quick visual cue about the air quality.
The initial setup was smooth, with the sensors and LED strip communicating seamlessly through Home Assistant. However, I faced a bit of a hurdle when it came to mapping the CO2 levels to the LED colors. I wanted a gradient effect where green represented good air quality, yellow for moderate, and red for high levels. After some trial and error with the code, I managed to get it working perfectly!
One unexpected challenge was the physical arrangement of the LED strip. Since it’s a ring, I had to figure out how to use only a portion of it without cutting the strip. I ended up using a small piece of clear tape to secure the unused LEDs, making the setup look neat and professional.
Seeing the LEDs change colors in response to real-time CO2 levels was incredibly satisfying. It not only adds a cool tech element to my home but also serves a practical purpose by reminding me to open the windows when the air quality drops.
I’d love to hear if anyone else has tried similar projects or has tips for improving the visualization further. Maybe adding sound notifications or integrating it with other smart devices could take it to the next level!
Thanks for reading, and happy tinkering! 