====== AM2302 DHT22 Sensor ======

Small 3-wire **temperature and humidity** sensor

{{composants:am2302-dht22.jpg?300}}

===== Specifications =====

//(Source : [[https://learn.adafruit.com/dht/overview|Adafruit]])//

  *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 15.1mm x 25mm x 7.7mm
  *4 pins with 0.1" spacing



===== Usage =====

You can use the Adafruit DHT library.

{{composants:dht22wiring.jpg}}

<WRAP info>DHT22 and AM2302 often have a pullup already inside, but it doesn't hurt to add another one ! </WRAP>

===== Demo =====

Use the basic example from Adafruit library


===== Ressources =====

  *[[https://learn.adafruit.com/dht/overview|Adafruit]]