This is the famous DHT22 Humidity and temperature sensor module. It takes only 1 wire (digital) to communicate with the microcontroller. The sensor is calibrated and doesn’t require extra components so you can get right to measuring relative humidity and temperature.
Features:
- 3.3-6V Input
- 1-1.5mA measuring current
- 40-50 uA standby current
- Humidity from 0-100% RH
- -40 - 80 degrees C temperature range
- +-2% RH accuracy
- +-0.5 degrees C
Documents:
- Datasheet (DHT22)
- Example Code (Arduino) (Credit to Adafruit)