Tired of condensation wrecking your shed tools or greenhouse gear? I built a no-frills ESP32 + DHT22 node that wakes every 15 minutes, grabs temp/humidity data, beams it over Wi-Fi, and sleeps—running ...

The hardware setup shown below includes the Arduino Uno R4, a DHT11 sensor, and the built-in Wi-Fi for email alerts. The DHT11 is connected with VCC to 5V, GND to ground, and the data pin to Digital ...

The U.S. Department of Energy (DOE) has launched three RFID-based sensor projects as part of a $19 million investigation into identifying ways in which technology can make energy efficiency more ...

Now in its sixth year, the Cornell project team CU GeoData bridges engineering and earth sciences to design and deploy environmental sensors, including a sensor network across the Finger Lakes and a ...

Spring showers may bring flowers and sunlit afternoons, but they also bring moisture that creeps into walls, ceilings and ...