To use this Atheros device on Debian Linux, I have installed "firmware-atheros" which is a Debian package. To do so, click on "System", "Administration" and "Synaptic Package Manager".
Type the keyword below in the Quick search box:
After that, click on the square next to "firmware-atheros"and click on "Mark for Installation". Then, click on "Apply".
Then, in Terminal, type:
Type the password of the superuser. Then, restart the network by the command:
Open a web browser and enter the web address and hit Enter. It should work.
If the password or other network details are not set, I can refer to the information on connecting to the Internet on Debian Linux.