DHT22 Temperature and Humidity Sensor

The DHT22 AM2302 is an inexpensive sensor for humidity and temperature with a digital single-wire interface. It is factory calibrated and has a high resolution. The required resistors are already mounted on the board, so it can be connected directly to the microcontroller.

Recommended Accessories:

• Dupont Cable M-F 20cm 20 Pieces

Features:

• Needs only one digital pin
• Its own single-wire protocol, not compatible with Dallas 1-Wire
• Read at most every 2 seconds
• Board with 4 mounting holes
• Arduino library «DHT sensor library» in the Library Manager

Application Examples:

• Monitoring indoor climate
• Weather stations
• Climate measurement in greenhouses

Documentation:

• DHT11 and DHT22 with Arduino tutorial (Last Minute Engineers)
• DHT sensors, comparison and wiring (Adafruit)
• DHT sensor library (GitHub)
• DHT22 AM2302 datasheet (PDF)

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
• Pins: DAT, VCC, GND
• Dimensions: 40 × 22.5 × 9.5 mm
• Weight: 7 g

Scope of Delivery:

• 1× DHT22 breakout board