indeedhat

# Add this line in /etc/apt/sources.list
# deb http://httpredir.debian.org/debian/ bullseye main contrib non-free

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 648ACFD622F3D138
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 0E98404D386FA1D9
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 605C66F00D6C9793
sudo apt-get update --allow-unauthenticated

# this will produce an error... go with it
sudo apt-get install firmware-atheros