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:

High accuracy
Capacitive type
Full range temperature compensated
Relative humidity and temperature measurement
Measure digital signal
Outstanding long-term stability
Extra apparatus not needed
Long transmission distance
Low power use
Four pins packaged

dht22 pinout

Features:

Measuring series	temperature -40-80 ℃; humidity 0; 99.9%RH
Measurement accuracy (25℃)	temperature: + 0.5; humidity: + 2%RH (10; 90%RH)
Resolution: temperature	0.1 ℃, humidity: 0.1%RH
reduction value: temperature	<1℃ / year; humidity: < 1%RH/ years
Sensor type: temperature	resistance type sensor
Response time: temperature	5S; humidity: 5S 1/e (63%)
Work within the scope	-40-80℃
Power source	DC3.3-5.5V
Shell material	PC plastic
Weight	1 gram
Color	White

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.