DHT22 Temperature and Humidity Sensor Plug-in

The DHT22 from Waveshare carries a factory calibrated AM2302 sensor for humidity and temperature with a digital single-wire interface. Compared with the DHT11, it has higher accuracy and a larger measuring range. The board has an XH2.54 connector, so self-crimped cables can also be connected. The required resistors are already mounted, so it can be connected directly to the microcontroller.

Recommended Accessories:

• Dupont Cable M-M 20cm 20 Pieces
• Shelly Plus AddOn

Features:

• Requires only one digital pin
• Proprietary single-wire protocol, not compatible with Dallas 1-Wire
• Query at most every 2 seconds
• PWR LED for the operating voltage
• Arduino library «DHT sensor library» in the Library Manager

Application Examples:

• Monitoring indoor climate
• Weather stations
• Humidity and temperature controllers

Documentation:

• Wiki Waveshare
• DHT11 and DHT22 with Arduino tutorial (Last Minute Engineers)
• DHT sensor library (GitHub)

Technical Data:

• Model: DHT22 AM2302, marking: AOSONG AM2302
• Operating voltage: 3.3 to 5.5 V
• Humidity measuring range: 0 to 99.9 % (2 to 5 % accuracy)
• Temperature measuring range: -40 °C to 80 °C (±0.5 °C accuracy)
• Resolution: 0.1 % rH / 0.1 °C
• Response time: approx. 2 s
• Connections: VCC, GND, DOUT
• On the Arduino UNO for example: VCC to 5V or 3.3V, DOUT to pin 2, GND to GND
• Dimensions: 40 × 15.4 × 10 mm
• Weight: 8 g

Scope of Delivery:

• 1× DHT22 temperature and humidity sensor plug-in
• 1× Cable XH2.54 to 3-pin female Dupont, 20 cm