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.
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