best to my knowledge bluetooth is installed from debian package and that’s the version used. So from DietPi side nothing can be done as long as there is no other debian package available. I tested it on my RPi3
root@DietPi3:~# dpkg -l bluez
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============-============-============-=================================
ii bluez 5.50-1+rpt1 armhf Bluetooth tools and daemons
root@DietPi3:~#
Thanks Joulinar, so you installed only Bluez 5.50 from the buster repo and that seems to work fine?
I was wondering if I also need other more updated dependencies alongside to be installed too.