On Fri, 5 Jun 2020 12:28:05 +0100, Andy Burns wrote:

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

https://www.extremetech.com/extreme/...s-network-made
-
with-red-and-green-laser-pointers

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

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.

--
Cheers
Dave.