.product-info-tutorial{margin-bottom:20px;}.product-tutorial-img-container{width:20%;}.product-tutorial-img-container img{margin:0;}version="1.0" standalone="yes"? The DHT22 is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). It's fairly simple to use, but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so when using our library, sensor readings can be up to 2 seconds old.Simply connect the first pin on the left to 3-5V power, the second pin to your data input pin and the rightmost pin to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin. We have an Adafruit Learning System guide with schematics, Arduino & CircuitPython code, datasheets and more!Compared to the DHT11, this sensor is more precise, more accurate and works in a bigger range of temperature/humidity, but its larger and more expensive.Comes with a 4.7K - 10K resistor, which you will want to use as a pullup from the data pin to VCC. Technical Details Low cost 3 to 5V power and I/O 2.5mA max current use during conversion (while requesting data) Good for 0-100% humidity readings with 2-5% accuracy Good for -40 to 80°C temperature readings ±0.5°C accuracy No more than 0.5 Hz sampling rate (once every 2 seconds) Body size 27mm x 59mm x 13.5mm (1.05" x 2.32" x 0.53") 4 pins, 0.1" spacing Weight (just the DHT22): 2.4g Adafruit Learning System guide has schematics, code, datasheets and more! Learn DHT11, DHT22 and AM2302 Sensors Basic temperature & humidity sensors DHT Humidity Sensing on Raspberry Pi or Beaglebone Black with GDocs Logging Humidity and Temperature Logging From Your Pi or Beaglebone Black to the Cloud! WiFi Weather Station Make a WiFi-connected weather station using Arduino & the CC3000 WiFi chip! Trinket Temperature & Humidity LCD Display Monitor temperature and humidity on an LCD display with this compact Trinket-based project SEE ALL GUIDES
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