DHT22 capacitive humidity sensing digital temperature and humidity module is one that contains the compound has been calibrated digital signal output of the temperature and humidity sensors. Application of a dedicated digital modules collection technology and the temperature and humidity sensing technology, to ensure that the product has high reliability and excellent long-term stability.
Standard single-bus interface, system integration quick and easy. Small size, low power consumption, signal transmission distance up to 20 meters, making it the best choice of all kinds of applications and even the most demanding applications.
DHT22 has higher precision and can replace the expensive imported SHT10 temperature and humidity sensor.It can measure the environment temperature and humidity to meet the high demand. The product has high reliability and good stability. If it’s used and combined with special sensor Arduino expansion board, it will be easily implemented the interactive effect which related to the temperature and humidity perception.
Pin 1: Power +Ve (5V Max wrt. GND)
Pin 2: Digital I/O interface connected to the microcontroller
Pin 3: Power Ground or Power –Ve
Measurement range of humidity: 0-100% RH
Precision of humidity measurement: +2% RH
Temperature Measurement Range: - 40-125 C
Accuracy of temperature measurement: +0.2 C
Working Voltage: 5VDC