Hello, can two laptops relate to each other over a distance of say 3kms in remote locations sometimes hilly and usually trees. Want to share spreadsheet data. Or can a device at same distance send a signal to a single laptop reliably?
Not always cellular network available, and situations will vary but will always be off beat. Motorsport venues and trying to connect start and finish lines to share data. Even just an electronic signal transmitted from the start line in order to activate the timing gear would be good. I think Bluetooth only good over short distances, so I am thinking maybe modified CB radios on the UHF??