To install the module for the RTL8723DE chipset, first determine your kernel using uname -r if your kernel is lower than 4.11, do

sudo apt-get install build-essential dkms git
git clone -b 4.10-down https://github.com/jeremyb31/rtl8723de.git
sudo dkms add ./rtl8723de
sudo dkms install rtl8723de/5.1.1.8_21285.20171026_COEX20170111-1414

Then reboot