☁️ DHT11, DHT22 and DHT21 sensors comparison

Daniil Zhuk
Today there are many sensors and modules that can be used to measure temperature and other indicators related to the maintenance of optimal human activity, as well as other things and organisms.

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☁️ DHT22 and Arduino – connection circuit

Daniil Zhuk
The vast majority of beginner projects on the Arduino are in one way or another connected with obtaining environmental data, such as weather stations. Usually, they use ultra-cheap low-flow DHT11, which normally measures the only temperature, and humidity only indirectly depends on the environment. 

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