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I am a student researcher; I am working on my Ph.D., which is about sea cages for aquaculture. I want to extend the wifi from an office in the land to sea cages 2km far away, in the sea. My goal is to use the wifi for sensors data collection and video surveillance.

I did buy two Tp-link Cpe210(+5km), I did setup one as AP and the other in the cages as a client; but unfortunately it didn't work; wasn't able to connect to the AP event if the signal was about -80 dBm in the client side.

So now I am stuck I can't setup the Wireless link between the land and a sea spot (where the sea cages are placed)
so my question is how to setup a connection between the office and the sea cages which are 2km away from the office), so I can do video surveillance and sensor data collection?


thanks for helping me :)