Try uninstall the update which caused this issue and see if problem persist?
Try visit your device's manufacturer website and see if there is a newer Wi-Fi driver available.
Are you seeing your Wi-Fi in the Device manager?
Also added fyi-I previously had used the ndisgtk to install windows 7 drivers but that alone sure didn't help... so the above may be the only bit you need. I also added the bin files included in the 7 directory to my firmware folder.
I wanted to make an update to natura's answer mainly because I bought a Cisco AE6000 a year ago and wasn't able to use the device even after initially building the /sanrath/mediatek_mt7610u_sta_driver_linux-64bit driver. With the comment from ozbek about changing the ./os/linux/config.mk CHIPSET_DAT variable to 2870, running sudo make && make install resulted in a fully working USB wireless adapter.
According to the kernel database, the RT3270 has expiremental support in the RT2800_USB driver through the "CONFIG_RT2800USB_RT53XX" switch, which is enabled in the zgemma config.
So installing kernel-module-rt2800usb should do the trick.
Now on Openpli 7 is new feature, when you click on plugins there are modules there, and the module RT2800_Lib and USB is there, so i assume is installed, but the USB not working, i tried manually the driver still nothing, I think maybe is problem with Zgemma Drivers?