deb http://httpredir.debian.org/debian/ jessie main contrib non-free
# apt-get update
# apt-get install linux-image-$(uname -r|sed 's,[^-]*-[^-]*-,,') linux-headers-$(uname -r|sed 's,[^-]*-[^-]*-,,') broadcom-sta-dkms
modprobe -r b44 b43 b43legacy ssb brcmsmac bcma
modprobe wl
$ su
# aptitude update
# aptitude install plasma-widget-networkmanagement