DHT22 Humidity and Temperature Sensor

The DHT22 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).Simply connect the first pin on the left to 3-5V power, the second pin to your data input pin and the right most pin to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin.

Compared to the DHT11, this sensor is more precise, more accurate and works in a bigger range of temperature/humidity, but its larger and more expensive.

Comes with a 4.7K – 10K resistor, which you will want to use as a pullup from the data pin to VCC.

DHT22 also referred to as AM2302 capacitive humidity sensing digital temperature and humidity module is one that contains the compound that has been calibrated digital signal output of the temperature and humidity sensors. Application of a fanatical digital modules collection technology and therefore the temperature and humidity sensing technology, to make sure that the merchandise has high reliability and excellent long-term stability.

Product Particulars: DHT22 Humidity and Temperature sensor

Accuracy	humidity +/- 2 % RH (Max +/- 5 % RH) ,
Mannequin	DHT22
Sensor Size (millimetre)	small dimension 14 x 18 x 5.5 mm; massive dimension 22 x 28 x 5 mm
Humidity sensor	Polymer humidity capacitor
Temperature sensor	Thermistor
Provide voltage	3.3 to five.5V DC
Working vary	humidity 0 to-100 % RH , temperature – 40 to 80 deg Celsius
Output sign	digital sign by way of 1- wire bus
Decision or sensitivity	humidity 0.1% RH ; temperature 0.1 Celsius
Repeatability	humidity +/- 1% RH; temperature +/- 0.2 Celsius
Sensing interval	Common: 2 s

DHT22 additionally known as AM2302 capacitive humidity sensing digital temperature and humidity module is one which comprises the compound that has been calibrated digital sign output of the temperature and humidity sensors. Software of a fanatical digital modules assortment expertise and due to this fact the temperature and humidity sensing expertise, to make it possible for the merchandise has excessive reliability and glorious long-term stability.

The sensor features a capacitive sensor moist parts and high-precision temperature measurement units and linked with a high-performance 8-bit microcontroller. The product has the excellent high quality, quick response, sturdy anti-jamming functionality, and excessive value.

Commonplace single-bus interface, system integration fast and simple. Small dimension, low energy consumption, sign transmission distance as much as 20 meters, making it your best option of every kind of purposes and even essentially the most demanding purposes.

DHT22 has greater precision and will exchange the costly imported SHT10 temperature and humidity sensor.
It could possibly measure the setting temperature and humidity to fulfill the excessive demand. The product has excessive reliability and good stability. If it is used and mixed with a particular sensor Arduino enlargement board, it will likely be simply carried out the interactive impact associated to the temperature and humidity notion.

Warning: DHT22 digital temperature and humidity sensor is supposed for analog sensor interfaces. The analog port can be used because the digital which won’t occupy the unique digital port of the Arduino. The strains of the sensor can remodel the analogue operate to digital that can be utilized on a digital port.

Each sensor of this mannequin is temperature compensated and calibrated in an correct calibration chamber and the calibration-coefficient is saved in the kind of program in OTP reminiscence, when the sensor is detecting, it’s going to cite coefficient from reminiscence. Small dimension & low consumption & lengthy transmission distance(20m) allow DHT22 to be suited in every kind of harsh utility events. Merely join the primary pin on the left to 3-5V energy, the second pin to your information enter pin and the rightmost pin to floor. Though it makes use of a single-wire to ship information it is not Dallas One Wire suitable! If you need a number of sensors, all will need to have its personal information pin!