This code will tested on this product of iotwebplanet.

sudo rm -rf LCD-show
git clone https://github.com/vivekaris/LCD-show.git
chmod -R 755 LCD-show
cd LCD-show/

Then Run Following command as per you screen size.

In case of 2.8″ LCD
sudo ./LCD28-show

In case of 3.2″ LCD
sudo ./LCD32-show

In case of 3.5″ GPIO Display
sudo ./LCD35-show

In case of 3.5″ HDMI Display-MPI3508
sudo ./MPI3508_480_320-show
or
sudo ./MPI3508_600_400-show
or
sudo ./MPI3508_720_480-show
or
sudo ./MPI3508_810_540-show
or
sudo ./MPI3508_960_640-show

In case of 3.5″ DPI Display-MPI3510
sudo ./MPI3510-show

In case of 3.97″ LCD
sudo ./LCD397-show

In case of 4.3″ LCD
sudo ./LCD43-show

In case of 5″ LCD
sudo ./LCD5-show

In case of 7inch(B)-800X480 RPI LCD
sudo ./LCD7B-show

In case of 7inch(C)-1024X600 RPI LCD
sudo ./LCD7C-show

If you need to switch back to the traditional HDMI display
sudo ./LCD-hdmi

Wait a few minutes,the system will restart automaticall , enjoy with your LCD.