OT _ networking

Why should this not work? You buy an Internet router with WLAN, place it on the side of group_2, give it a unique WLAN address that only the raspberries in group_1 know and use, connect all the group_2 raspberries to that router using LAN cables, and then that router connects to the web.

Most such WLAN routers have 4-8 LAN cable ports. I found the TP-Link variety with the three antennas to be pretty good.

You could also use directional antennas to make this more robust but that gets you into a legal gray zone and could also result in too much data loss should there be a traffic jam (unless using lamp posts and such).

You didn't say how far, but I found Ubiquity access points have better range than most.

Den torsdag den 14. september 2017 kl. 18.07.25 UTC+2 skrev gm:

a Ubiquiti point to point bridge is stupidly simple

Use cable.

Across a road?

John

Just rent one of these :-)

It is easy to do WiFi across a road, at least when you can put the access points high enough so passing trucks and buses do not interrupt the free sight.

Something like this should do it:

When you need 1Gbps you can use something like this:

Outdoors you need something that is water-proof and can also withstand baking weeks on end in the glistening sun without the enclosure turning yellow and cracking. Must also be thunderstorm-tolerant. That is easier said than done, I am designing such stuff a lot (not for WLAN though).

That depends a bit on where you live. Products like the above are ok-ish for western Europe (where they were designed).

Maybe more accurately: "northern" Europe. Say, the latitudes spanned by Great Britain.

Even so just a few packets fall by the wayside. Annoying for streaming HDTV but irrelevant for web browsing or email.

Who said anything about outdoors? I used a flat panel high gain antenna and a cheap USB dongle that accepts a external antenna to extend my network ~200m to the village hall for lectures. Glass is transparent to RF as are roof tiles. Bandwidth suffers a bit though in heavy rain.

(although I used it indoors hung at the top of a window)

The VH now has its own microwave link internet that is faster than mine.

Not all glass is transparent, especially the new types aren't. (in office environment the chance of finding some IR filtering glass is even higher than in normal housing)

A wooden roof including tiles is quite a hefty attenuator at 5.6 GHz, and on 60 GHz it is even worse.