opensuse 42.3
the device https://plugable.com/products/usb-bt4le
you may encounter problems with :
- hfp/hsp , a2dp profile
- activate/disactivate bluetooth with bluedevil plasmoid.
to solve these problems you must supply the firmware of the device according system loads this firmware instead of a default one when pc starts .
in a user console execute the following command to download the firmware file:
wget https://s3.amazonaws.com/plugable/bin/fw-0a5c_21e8.hcd
in /lib/firmware/brcm
Copy the firmware file to the /lib/firmware/brcm folder and rename the file to BCM20702A1-0a5c-21e8.hcd:
sudo mv fw-0a5c_21e8.hcd /lib/firmware/brcm/BCM20702A1-0a5c-21e8.hcd
why renaming ? because system with kernel 4.4.104 expects this name
reboot pc
check in boot.log there is no more message about failing to load firmware BCM20702A1-0a5c-21e8
inspired from https://plugable.com/2014/06/23/plugable-usb-bluetooth-adapter-solving-hfphsp-profile-issues-on-linux/
interesting doc about problem with some devices (bose , plantronics etc.) and new bluetooth features
https://plugable.com/2017/02/07/bluetooth-audio-problems-cant-get-your-bose-quietcomfort-35-connected-check-here-first/
other interesting doc
https://plugable.com/2017/03/15/bluetooth-profile-compatibility-with-the-plugable-usb-bt4le/