Since his PS4 UART for Dummies Guide, PlayStation 4 developer @LightningMods let us know in the Shoutbox that he released a Controller Test homebrew application called ControllerHomebrew.pkg on Twitter with details below.
Download: ControllerHomebrew.pkg (109 MB - Mirror via Dylan57richem) / PSVibe: PS4 Edition Controller Rumbler Tester
To quote: "Today, I will be releasing my Controller Test Homebrew i made ... it took me a VERY long time and 7 UART Logs later i have my first PS4 Homebrew, and much more to come!"
Spoiler
Update: Also below is Open GCI by milador, which is an open source accessible game controller interface for PS4 with more details available in the README.md file.
Download: Open-GCI-master.zip / GIT
Download: ControllerHomebrew.pkg (109 MB - Mirror via Dylan57richem) / PSVibe: PS4 Edition Controller Rumbler Tester
To quote: "Today, I will be releasing my Controller Test Homebrew i made ... it took me a VERY long time and 7 UART Logs later i have my first PS4 Homebrew, and much more to come!"
Spoiler
Update: Also below is Open GCI by milador, which is an open source accessible game controller interface for PS4 with more details available in the README.md file.
Download: Open-GCI-master.zip / GIT