This is mostly for my own benefit when I invariably format a computer using these adapters and forget how to get wifi working again:
Plug device in and ensure it is detected via lsusb
:
For the T3U Plus, the ID is 2357:0138
.
Instructions from this StackOverflow answer
git clone https://github.com/aircrack-ng/rtl8812au.git
cd rtl8812au
sudo make dkms_install
Reboot.
Instructions from this GitHub repository, run as root:
git clone "https://github.com/RinCat/RTL88x2BU-Linux-Driver.git" /usr/src/rtl88x2bu-git
sed -i 's/PACKAGE_VERSION="@PKGVER@"/PACKAGE_VERSION="git"/g' /usr/src/rtl88x2bu-git/dkms.conf
dkms add -m rtl88x2bu -v git
dkms autoinstall
Reboot.
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Unfortunately I haven't tried that, but FreshTomato is pretty featureful, I wouldn't be surprised if it did