Build a Tool That’ll Tell You When to Open and Close the Windows

According to Adafruit Blog, an Instructables user named mattmk1 has designed a clever DIY device to solve a common problem: figuring out when to open and close your windows for optimal cooling. The tool uses an ESP32 microcontroller and a temperature sensor to monitor conditions inside and outside, then tells you when it's the right time to open a window — eliminating the guesswork from temperature management. It's a simple but practical project for anyone interested in electronics and home automation.

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