Why are the cameras falling off?

Question

WiFi

We have three devices access point Ubiquiti NanoStation Loco M5
The distance between access points is 30 meters from the force.
So, all the cameras in the store constantly fall off on random days, they don’t come to the registrar - only restarting Station3 helps.
Tried to do any of them Access Point and other Station respectively.

Please help me figure out what steps to take. dragging the cable is not an option - you will have to dig the territory.
Some mystic..

Answer 1

You need to look at the area.
Are the Stations directed to the Access Point?
Surely, the Access Point cannot be directed to both Stations at the same time, so you need to mentally build a triangle and put the Access Point at the vertex where the angle is the sharpest , see the figure.
Is the dot on the belfry high or about the same height as the other two? If the height is noticeably different, are the devices pointing at each other and in height, and not just in azimuth?
Are there any obstacles between Station and Access Point (trees, houses)? If there are obstacles, then the 2.4 GHz band of iron can give a slightly better result than 5 GHz.
And finally: is there a fixed channel on the Access Point? If not, then set, do not set automatic selection.

Some kind of mystic

Mystical knowledge has accompanied religion for thousands of years. But in this case, physics is relevant. :)

dragging the cable is not an option - you have to dig the territory

And there is no way to stretch the cable through the air?

Answer 2

To operate in the 5GHz band, a frequency license is required. Otherwise, the RF authorities will issue a fine. To assess the passability of the radio path and the choice of equipment, you can use the linktest.ru resource. I've been using it myself for many years. I built a network on Nanostation M2, at a distance of 1.5-2 km through the copse where the base stood and below the radio horizon by 7-8 meters the base. The network worked in snowfall and heavy fog, the average speed was 100-107mb.