I hope you'll forgive me for including a few questions at once. I'd appreciate insight into any of them.
I've got a camper stored legally in town to use as an office. I'm situated between two free WiFi Xfinity transmitters, each about 300ft away. I have access to electricity while I'm there.
I'd like to set up a pogoplug running Arch Linux to pick up the Xfinity signal with a long range antenna, and then retransmit the signal so that I can use my phone, tablet, Roku, etc. inside the camper.
My research so far indicates that I might want either a stick or dish shaped antenna, and that I need a USB wifi adapter to connect the antenna to the pogoplug. So, products might be (with Amazon product ASINs, to link like this https://www.amazon.com/dp/B008Z4I7WQ):
(Amazon ASIN B003CFATOW)
Yagi WiFi Antenna 2.4GHz 17dBi Angle H:25° V:24 Outdoor Directional Wireless
(Amazon ASIN B008Z4I7WQ)
for the antenna, and
Alfa Long-Range Dual-Band AC1200 Wireless USB 3.0 Wi-Fi Adapter w/2x 5dBi External Antennas - 2.4GHz 300Mbps / 5Ghz 867Mbps - 802.11ac & A, B, G, N
(Amazon ASIN B00MX57AO4)
for the WiFi adapter. Just typical examples of what I'm considering.
Is there an innate limitation within Arch Linux about which wireless protocols can be supported (a,b,g,n,ac)? Ditto frequencies (2.4Ghz,5Ghz)? If so, that would guide my choices on hardware.
Is dBi the metric I should be looking for when shopping for the antenna? Any best guesses what dBi I might need for 300 ft across a parking lot? Any reason not to go higher?
Any recommendations for particular WiFi adapters to work the easiest with Arch, which also support a high gain antenna upgrade?
I've already researched the Linux configuration for a wireless repeater and it seems that this is easily accomplished. I'm new at all of this, so please do let me know if you think I'm off track in any way.