Description

DHT22 Temperature and Humidity Sensor

What is DHT?

DHT-22 DHT 22 DHT22 Temperature and Humidity Sensor Module are a primary, low-cost digital temperature, and humidity sensor. The use of a humidity sensor and a thermistor to measure the nearby air. It spits out a digital signal on the data pin. This is very simple to use. The sensor requires careful timing to grab data. The drawback of this sensor. Every 2 seconds, you can new data. Sensor readings can be up to 2 seconds old.

How does it work?

The sensor  Connects the first pin on the left to 3-5V power, the second pin to your data input pin, and the right side pin to the ground. it uses a single wire to send data, it is not Dallas One Wire.  If you want multiple sensors, each one must have its own data pin.

Specifications:

1. High accuracy
2. Capacitive type
3. Full range temperature compensated
4. Relative humidity and temperature measurement
5. Measure digital signal
6. Outstanding long-term stability
7. Extra apparatus not needed
8. Long transmission distance
9. Low power use
10. Four pins packaged

dht22 pinout

Features:

Package Includes:

1 x DHT22 Digital Temperature and Humidity Sensor Module

DHT-22 DHT 22 DHT22 Digital Temperature and Humidity Sensor Module are a primary, low-cost digital temperature, and humidity sensor. The use of a humidity sensor and a thermistor to measure the nearby air. It spits out a digital signal on the data pin. This is very simple to use. The sensor requires careful timing to grab data. The drawback of this sensor. Every 2 seconds, you can new data. Sensor readings can be up to 2 seconds old.