TP-LINK TL-WN823N Unable to connect to network

You need to install a driver. You can do it this way.

Disable Secure Boot in UEFI, if UEFI is used in your computer.

Run in terminal

sudo add-apt-repository ppa:hanipouspilot/rtlwifi
sudo apt update
sudo apt install rtl8192eu-dkms

Reboot and insert the dongle.

I packed and patched for kernel 4.4 the latest Realtek driver from Tp-Link site. It supports also many other 8192eu dongles.

You can also directly download this package without adding the PPA. The package can be downloaded from this link. It will be available until I upload a newer version.

You can find all packages HERE

You will also need to install dkms if it is not already installed.

If github is your thing then these guys also have a driver that is up-to-date with patches: https://github.com/Mange/rtl8192eu-linux-driver

Certainly it works for my TL-WN823N V2 on a raspberry pi 2.