The DHT22 Digital Temperature
and Humidity Sensor Module 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). Sensing
Module is 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. The Temp and Humidity sensor can measure
temperature from -40°C to 80°C and humidity from 0% to
100% with an accuracy of ±1°C and ±1%. So if you are looking to measure in
this range then this sensor might be the right choice for you.
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