Some devices may require the DHTXX library installed and running. To do this, follow these steps to prepare.
Get the pigpio library and install it
sudo apt-get install pigpio python-pigpio python3-pigpio
Then download DHTXXD into a directory
mkdir DHT22 cd DHT22 http://abyz.me.uk/rpi/pigpio/code/DHTXXD.zip
unzip the DHTXXD.zip file
unzip DHTXXD.zip
Compile the DHTXXD
gcc -Wall -pthread -o DHTXXD test_DHTXXD.c DHTXXD.c -lpigpiod_if2
once done, the program DHTXXD will be available in this directory: /home/pi/DHT22/DHTXXD Remember this, you will need to recall this for later.
Now connect the DHT22 as shown 
