Improve your office (or home) air with a DIY sensor and Home Assistant

The air we breathe at home or in the office is crucial for our well-being and productivity. Often, however, indoor air quality can be affected by factors such as excess carbon dioxide (CO2), which leads to drowsiness and difficulty concentrating. For a while, I looked for a solution to monitor the air in my home office, but commercial options were often expensive and not flexible enough to integrate with my Home Assistant setup.