Humidity + Temperature Sensor (DHT 22) - P00093


Quick Overview:       14974
The DHT22 is a basic, low-cost digital temperature and humidity sensor.


Technical Specifications
Reviews (9)

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). Its 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 through a 4.7k pull up resistor and the right most 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!

  • 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 80C temperature readings 0.5C accuracy
  • No more than 0.5 Hz sampling rate (once every 2 seconds)

9 Reviews for Humidity + Temperature Sensor (DHT 22)

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