GitHub - davidcmoffitt/Gamepad-Controller-Vibration-Test: An open-source tool that allows you to test the vibration strength and quality of your gamepad controller's rumble motors, providing real-time feedback with customizable vibration strength.
Gamepad Tester - Apps on Google Play
This App Lets You Mess Around with the DualSense's Triggers - IGN
HOW TO ENABLE VIBRATION ON GAMEPAD: 2017 - YouTube
What is a Vibration Controller? - Vibration Research