I need a long range routers to transmit data for a distance of about 1 Km.
My application is a "robotic deflectometer" that works under ground (5m under soil).
This robot will move in fiber glass pipes, making measurements and taking snapshots, then sending data by WiFi.
<<The two routers can see each others (the 1st router will be placed at the entrance of the pipe ( stationary ) which receives data,
While the 2nd router will move in the pipe ( mobile ) and transmit data for the first router ) but there might be some curved paths in the pipes, so routers may be out of sight.>>
So i am interested in long range WiFi routers with a long range.
So could any one please advise a certain system for my application.