How to make a wireless connection at a height of 3 meters and obstructions in sight?

Good day!
There are 2 warehouses in the line of sight at a distance of 420 meters. (+- 20m), but on the edge of the trees, the bushes. Height where you can have something to hang the 3.5-4 meters, above the residential unit of a foreign organization will not be allowed to hang anything out.
Is it possible to create a wireless, stable connection of at least 250 megabits?
The network will be heavily loaded with traffic, and stable 24/7, as through the warehouse network will go further and will unite the server units.
Snow, rain will interfere as I understand it?
What can you recommend technically?
Appeal, since no experience in wireless directional network connection.
Two router Mikrotik c PoE is. Need competent advice on antennas. Google a bunch of reviews, but in practice few decisions. What do you use?
5 answers
March 12th 20 at 08:44
Solution
but on the edge of the trees, the bushes.

Summer in the rain and fog of reliable communication will not be.

It is better to agree for the laying of the optics. Perhaps in conjunction with other owners and fumble fibre. 500m optics with cross fit and welding would be cheaper, faster and more reliable than radio links
March 12th 20 at 08:46
Solution
Or analogy from MT, as long as they have the other glands from the same MT.
For example https://market.yandex.ru/product--wi-fi-router-mik...

Most sane sellers on ukazanomu mini TK will offer the relevant options. - Devon_Larkin commented on March 12th 20 at 08:49
March 12th 20 at 08:48
ustroistva wifi, in principle, allowed to work only with non-directional whip antenna, the use of directional antennas requires communication with radioaxiom.
but if you do not catch it pofih.
any podklady geometry with the largest gain and a suitable connector.
the distance is small, work is likely to be, but the correct answer is "going to work" will only prof of the company after field zamereny :-/
I agree that Wi-Fi is suitable, we already have got.
This distance will run almost any antenna and even with a small capacity.
It requires about 6 months for the issue of permits and other things. You can turn just like that, but can catch and fine you.
Vegetation , hydrometeors attenuate the signal, not so much at this distance.
Antenna better to take a focused, narrower. Some craftsmen did their banks to shove.
For reliability it would be better to buy a couple of antennas and post them, that would work for 2x2 scheme. This will yield about is 99.995% the stability of the connection. - Carmine_Brekke commented on March 12th 20 at 08:51
March 12th 20 at 08:50
One answer: if you want speed more than 25 MB/s and a stability of more than 50% only optics.
WIFI stability is not provided by definition, because the air is one for all, Yes, there is technology which allows to increase the stability/performance, but 100% guarantee only gives a closed transmission medium.
Stable and powerful equipment for outdoor directional WIFI belongs to the operator class, and there is bureaucracy radioaxiom will be much more than the owner of the territory on the issue of cable routing.
March 12th 20 at 08:52
Is it possible to create a wireless, stable connection of at least 250 megabits?
No.
1)Must be line of sight - no obstacles in the way of the signal.
2)Must be clean Fresnel zone - no obstacles in a radius of 2.2 meters from a straight line connecting the points.
3) 250-300мегабит you can squeeze them good equipment at a small distance in mnogoetajnoe configuration. But the bridge will not work, the more stable.
Hundred can if 1, and 2пункты done.

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