Bisoon has released PS4Lib, a Windows library that lets you send Messages to your PS4. The tool ships with a Demo GUI which, among other things, lets you send notifications to your PS4. Operating PS4Lib and its demo requires a hacked PS4 4.05.

download https://github.com/BISOON/PS4Lib

via http://wololo.net/2018/02/20/release...ions-ps4-4-05/