GND of the module is the common (0V) connection. The digital signal output to be detected (usually marked as DO in the module) is applied to D2 input of the Arduino. Analog output (marked as AO) from ...

Keeping track of things like the temperature, humidity ... enough to add in an internet connection so you could get an alert of text or email. You'll need an Arduino along with a bunch of various ...

The Anavi Thermometer Development board is fully compatible with the Arduino IDE ... with a built-in DHT22/AM2302 temperature and humidity sensor and has slots for a mini OLED display, waterproof ...