GNU/Linux KDE Neon Installing Broadcom BCM43142 Driver Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install Broadcom BCM43142 Wi-fi/Bluetooth Driver in KDE Neon LTS GNU/Linux Desktop.
The Package Provides the Source Code for the wl Kernel Modules and makes use of the DKMS Build Utility to Install them for the Running Kernel.
GNU/Linux KDE Neon Broadcom BCM43142 Driver Installation Guide