If the W has the same Radio-Chipset as the Pi3 (which, IIRC, it has) you can try the following: wget 'http://archive.raspberrypi.org/debian/pool/main/f/firmware-nonfree/firmware-brcm80211_0.43+rpi4_all.deb' sudo dpkg -i firmware-brcm80211_0.43+rpi4_all.deb This will download the firmware files need...

Hi - are there already Raspbian lite images available for download which hold Debian9? Not yet as has been discussed. Though you can update a Raspbian Jessie Lite to Raspbian Stretch Lite..... update your /etc/apt/sources.list replacing "jessie" with "stretch", then run apt-get update && apt-get up...