Install bcmwl-kernel-source by entering the following commands in the terminal:
sudo apt update sudo apt install bcmwl-kernel-source
Description:
Broadcom 802.11 Linux STA wireless driver source
This package contains Broadcom 802.11 Linux STA wireless driver for use with Broadcom's BCM4311-, BCM4312-, BCM4313-, BCM4321-, BCM4322-, BCM43224-, and BCM43225-, BCM43227- and BCM43228-based hardware.
Version: 6.30.223.271+bdcom-0ubuntu4
Section: restricted/admin