someone have to do anything in relation to wifi wireless.
Well, that is not simple. If we can use the AR9271 chipset (TL-WN722's chipset), it is thanks to Chris' advocacy. He convinced Qualcomm/Atheros to release the firmware as free software. If you want to thank him, accept to pay a little more and buy a Wifi adapter from his company: http://libre.thinkpenguin.com
Using that link, 25% of the profit on your purchase is donated to the Trisquel project too. Also, with ThinkPenguin (or TechnoEthical), you have the guarantee that the adapter will work with free software.
With any other vendor, there is a risk that the chipset changed. Constructor sometimes do that: they change the chipset (what matters for the support) during the life time of a model and there is no way to know (the wrapping, in particular, is the same). That said, since recent buyers of the TL-WN722 reported that it still uses the AR9271 chipset, the risk is thin. Looking at h-node is more risky because you do not know when the device was reported to be working. Anyway, h-node is good for any other device and it still usually gives good buying advices for Wifi cards/adapters too.
