DHT22 Digital Temperature and Humidity Sensor

Module with temperature and humidity sensor with a digital interface, single-wired. Measuring range: temperature -40 to +80 °C, humidity 0-100% RH.

Description of product: Sensor of temperature and humidity DHT22 – module + cables

The module includes a popular sensor for measuring temperature and humidity. On the board are also, required for proper operation of the system: a resistor and a capacitor to filter the supply voltage. The sensor can be controlled using a microcontroller or any commissioning set, for example, Arduino. Before using, you need to see the documentation.

Pins are popular gold pin connectors (2.54 mm pitch) for connecting the sensor via wires or to directly attach to the breadboard. The set includes three colorful wires.

Connection example

The system contains passive components necessary for the proper operation of the sensor. The module is sufficient to connect via wires, to any microcontroller in the following way:

• VCC (+) – supply voltage from the range: 3 V to 5.5 V
• GND (–) – the ground of the system
• OUT– digital output connected to the input of the microcontroller

Parameters of the temperature and humidity sensor DHT22

• Sensor AM2302 (DHT22)
• Supply voltage: from 3.3 V to 5.5 V
• Average current consumption: 0.2 mA
• Does not require additional external components
• 3 x female-female wires – included
• Module dimensions: 44 x 16 x 10 mm
• Temperature
  • Measurement range: -40 to +80°C
  • Resolution: 8-bit (0.1 °C)
  • Accuracy: ± 0.5 °C
  • Response time: on average – 2 seconds
• Humidity:
  • Measuring range: 0 – 100 %RH
  • Resolution: 8-bit (±0,1 %RH)
  • Accuracy: ±2 %RH*
  • Response time: on average – 2 seconds

Details in the documentation.

*RH – relative humidity is expressed in percent. It is the ratio of actual humidity in the air to its maximum number that air can keep at a given temperature.