Week 6 : FYP2 DHT22 ( Temperature and Humidity Sensor )

The DHT22 could be a temperature and humidity detector that uses an electrical phenomenon humidity detector and a semiconductor to live the encompassing air, and spits out a digital signal on the information pin. Analog pin does not used on this sensor. It is very simple to use and the result is tally with the condition.  

The system integration is quick and easy when using single wire serial interface. The DHT22 is in small size, low power consumption and the signal transmission can be up-to-20 meter. It also have 4-pin package.

    Pin connection on the sensor:-

•      VCC = 3.3V

•      Data = Pin on the sensor

•      GND = Ground

Temperature Range	0 to 50 degrees Celsius
Humidity Range	20 to 80%
Operating Voltage	3-5V
Max current	2.5mA

 Table of Specification of temperature and humidity sensor