Arduino DHT22 sensor wiring

A DHT22 shares temperature and humidity readings over one data line. This breadboard layout powers the sensor from the Arduino Uno rails and routes its data output to D2. The pull-up resistor gives the data line its required idle state. The drawing is useful for assembling a basic monitoring project, where the corresponding sketch should use the same Arduino pin specified in the wiring. Before using the layout in a build or document, compare every label with the source requirements and update the drawing when parts, conditions, or materials change. The example is deliberately small so the essential relationships remain readable, easy to review with collaborators, and ready to extend with the details required for the actual project.