100 metre wifi

a standard pair of router will work IF you remove the supplied antennae and bang in some sort of mini directional antennae and line em up

e.g.

Have you considered connecting one or more directional antennas to a WiFi access point that has RF connectors? High gain Yagis, log-periodics and multi-element patch antennas can be found on eBay. Alternatively, have a look at Ubiquiti and MicroTik who both make a range of point-to-point ethernet repeaters.

John

Pringles can?

It's worth a go, but also to point out that a lot of these were designed in the 802.11b era, when top speed was 11Mbit/s. It's worth paying close attention to any set of instructions you follow as to whether it gives any speed measurements.

Back in the day, 1Mbps was ample when you had a 512Kbit/s broadband connection. Nowadays 1Mbps broadband is unusable.

Theo

The absolute cheapest way for that sort of range in in true DIY style is a pair of cantennas made out of old Pringle cans and some RF bits. Some soldering and slightly dodgy RF legality is involved in such a bodge.

I chose to do it with a normal router and a flat plate 14dB antenna and a cheap (intended to be sacrificial) USB Wifi dongle with removable antenna at the other. This was to extend my personal Wifi to the VH for doing computer classes when I wanted internet. That is about 100m.

I had planned to make a cantenna (indeed I dutifully ate the caustic crisps in the can) but ran out of roundtuits before I needed to have a working solution and quickly so I bought the right bits.

I'd try this dongle from Morgan at the far end together with a high gain antenna and suitable interconnect cable from Solwise.

You do need to be able to point the thing moderately accurately in about the right direction but it is nowhere near as tetchy as a yagi. I hung the remote antenna in a window facing my house when I needed it.

Shorter distances to the garden shed you might just get away with a right sized foil parabolic cylinder behind the original rod antenna.

polygonum_on_google explained :

If the two antennae can be sited with line of sight...

I set up a link of 3/4 of a mile some years ago, using two modified wifi routers and carefully aligned homemade Yagi antennae. I disconnected the built in antennas and used good quality 3Ghz coax no more than a couple of meters at each. My link worked rather well, despite there being lots of other wifi along the route.

While there are a number of "crufted" solutions adding directional antennae to normal wifi kit, you can get proper self contained external bridging units fairly cheaply these days. For example, these can be had for under £40:

Wasn't there a laser-based solution for such cases ?

I flagged these up 5,6 years ago when I was future-thinking for a living. Advantage is that they are much harder to intercept.

There was also research into using light modulation from bulbs to broadcast: Li-fi,

I did this for an elderly neighbour for a while. We had a diagonal line-of-sight across a fairly wide road and front driveways that I'll measure by pacing out the next time I go out.

I was able to run a Cat5 patch cable from her spare front bedroom to her router in the lounge and put a Bridge / AP / Ethernet to WiFi adaptor on the windowsill in that bedroom window.

My AP happened to be at the front of the house and I was able to get a pertty good / reliable link with just that.

In fact, the only time we generally lost the link was if a removals lorry parked in the road between us. ;-)

I helped set up similar for a mate in his workshop who wanted Internet access and was given permission by a local company to use theirs.

We positioned a (TP-Link) WiFi repeater (in this instance) fairly high behind some wooden facia and it has been able to provide a reliable link so far (couple of years)?

Again, only really has any issues if a large lorry parks between them.

As an experiment with another neighbour here I setup A TP-Link device, an AP in this case (TL-WA801ND) again in Ethernet to Wi-Fi mode and with it stood on my front bedroom windowsill (with the aerials looking though the glass at his house), I was able to connect to his network. In this case it was to try moving some big files but the link speed was reduced and it was pretty slow. That unit has removable aerials And I tried a small Yagi on one but can't remember if it helped at all / much (mate would probably have to do the same his end).

Cheers, T i m

rain and fog will eat into your link budget ...

definitely worth it as a starting point

That's why commercial laser links use IR lasers.

Should imagine the really hard part is having a sturdy enough mount that is easy to align but doesn't wobble. Doesn't take much movement of the laser pointer to shift the dot 100 m away quite a distance.

A friend of mine did this with a couple of woks to get from the village to his farmhouse, but he's an electronics guy who knows his stuff and likes tinkering.

Pringles can cantennas aren't very good, but using a larger diameter can works, plenty of info online.

The problem is not the outgoing, but the signal from the device, which is why you really need a remote hot spot connected by some kind of system made for the purpose. Brian