AM2302 DHT22 1-Wire Humidity and Temperature Sensor Arduino

The DHT22 is a popular 8-bit temperature and humidity sensor with digital interface that communicates via a single bus line called 1-wire (aka One-Wire).

This device has a wide range of applications: it can measure temperature from -40 ºC to 125ºC and air humidity from 0% to 100% RH. The system can be operated using a microcontroller or any development kit, eg Arduino UNO R3.

Specification:

Parameters

- Supply voltage: from 3.3 V to 6 V

- Communication: 1-Wire bus

- Average current consumption: 0.2 mA

Temperature

- Measuring range: -40 to 120 ° C

- Resolution: 8-bit (0.1 ° C)

- Accuracy: ± 0.5 ° C

- Response time: average 2 seconds

Humidity

- Measuring range: 0 - 100% RH

- Resolution: 8-bit (± 0.1% RH)

- Accuracy ± 2% RH *

- Response time: average 2 seconds