if your ps3 controller just vibrates when connecting to the retropie, or when your ps3 controller does not connect via bluetooth, this writedown might help you.
Since no exact description did work for me, I decided to write it down, what I did based on other descriptions, in order to get it to work.
- https://retropie.org.uk/forum/topic/5025/shanwan-ps3-controller-problems
- https://raspberryblog.de/?p=1870#more-1870
- https://learn.adafruit.com/install-bluez-on-the-raspberry-pi/installation
- https://bbs.archlinux.org/viewtopic.php?id=195886&p=2
- https://github.com/retropie/retropie-setup/wiki/Setting-up-a-PS3-controller