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