The realtec RTL8188EU dongle does not work out of the box on Fedora 23.

This guide help you compile the driver from source, or just download and install my compiled version.

Ubuntu guide here

Github source code (lwfinger)

Compiling and installing the driver the lwfinger provided on github

sudo dnf groupinstall "Development Tools" "Development Libraries"
mkdir -p ~/build
cd ~/build
git clone git://github.com/lwfinger/rtl8188eu.git
#
# Run the following each time kernel has been updated:
#
cd ~/build/rtl8188eu/
make
sudo make install
sudo depmod -a
sudo dracut -c -f -force
sudo modprobe 8188eu

Download my compiled driver

http://www.itso.dk/files/linuxsource/rtl8188eufw.tar.gz
tar -xvf rtl8188eufw.tar.gz
sudo mkdir -p /lib/firmware/rtlwifi 
sudo cp rtl8188eufw.bin /lib/firmware/rtlwifi/ 
sudo depmod -a 
sudo dracut -c -f 
sudo modprobe 8188eu