Hi everybody. I´m Alberto fromVenezuela, new to forum.
I need to control an entrance to my farm which is in a remote location. No telephone comm.so I need a transmitter with a range of 1.5Km. to activate a relay.
Line of sight is blocked by vegetation, some trees measure 15m. I would like my transmitter to be code protected for security. Should I consider FM, RF or whatever?
Thanks for responses.