Ubuntu 20.04 Connect Bluetooth on Dell-Inspiron 3521 BCM43142A0-0a5c-21d7

This tutorial will help you to connect Bluetooth on Dell-insperion-3521, This tutorial will work for all Bluetooth devices with model no. BCM43142A0-0a5c-21d7

We assume your Bluetooth device was not recognized by Ubuntu 20.04 :

Device Model- Dell-Inspiron-3521

Bluetooth hardware- 0a5c:21d7 Broadcom Corp. BCM43142 Bluetooth 4.0  (to get the name of Bluetooth hardware run lsusb in terminal.)

Ubuntu version: 19.10

Tested on kernel version: 5.4.0-21-generic (to get the version of current kernel uname -r in terminal.)

Steps to make Ubuntu recognize your Bluetooth device:

1. Download the drivers from here – Download Broadcom 0a5c:21d7 Bluetooth Drivers for Ubuntu.
2. Go to the download folder where you downloaded drivers and in terminal issue the command below :sudo cp ~/Downloads/BCM43142A0-0a5c-21d7.hcd /lib/firmware/brcm/BCM43142A0-0a5c-21d7.hcd
3. After copying the drivers : sudo modprobe -r btusb
4. At last sudo modprobe btusb
5. Now turn on the Bluetooth and in Bluetooth settings add a new device

Toggle Bluetooth on and off and it will start working as expected.

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