GNU/Linux Lite 4 Installing Broadcom Driver without Internet
How to Install Broadcom Wireless Driver on GNU/Linux Lite 4.x LTS without Internet Access.
Most noteworthy: to achieve this Setup you simply need any Online Computer with a Browser and a USB Stick to Copy the downloaded Packages.
But if you dispose of an Android Mobile Phone with Internet Acces, then an Easier Solution should be of using it! See: Internet Connection USB Tethering Guide.
Especially relevant: the Linux Lite 4 bcmwl-kernel-source Driver Supports the following Broadcom Wireless Chipsets:
- BCM4311
 - BCM4312
 - BCM4313
 - BCM4321
 - BCM4322
 - BCM43142
 - BCM43224
 - BCM43225
 - BCM43227
 - BCM43228
 - BCM4331
 - BCM4352
 - BCM4360
 
Finally, for BCM4306/3 and BCM4318 see instead: firmware-b43-installer; again for BCM4301, BCM4306/2, and BCM4309 the Legacy bundle: firmware-b43legacy-installer.
Installing Broadcom Wl Wireless Driver without Internet Access in Linux Lite 4.x GNU/Linux