HERE download your firmware in this site https://www.broadcom.com/support/802.11
Type: Posts; User: Try_Harder
HERE download your firmware in this site https://www.broadcom.com/support/802.11
Detect your Kali architecture(32bit/64bit)
and Download related driver form this link
For BCM43142 download driver named "Linux STA 32/64-bit driver"
and follow instruction here
Note:...
Dell inspiron 3543-i7 5500
lspci networks
06:00.0 Network controller: Broadcom Limited BCM43142 802.11b/g/n (rev 01)
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101/2/6E...