Table of Contents
AM2302 DHT22 Sensor
Small 3-wire temperature and humidity sensor
Specifications
(Source : 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.
DHT22 and AM2302 often have a pullup already inside, but it doesn't hurt to add another one !
Demo
Use the basic example from Adafruit library