Discover how to create a smart home system for optimal temperature and humidity control in this 30-minute conference talk. Learn from Martin Sonnenholzer's experience as he shares his approach to building a custom solution using Arduino boards and JavaScript. Explore the process of gathering data and controlling windows automatically, and gain insights on how to implement similar improvements in your own living space, regardless of ownership status. This presentation from the WeAreDevelopers World Congress 2018 offers practical knowledge for developers interested in home automation and IoT projects.