I have no experience with 1km wireless transmission.
Perhaps this other topic will contain some helpful ideas. I haven't read it fully. I just googled for "arduino 1km radio signal" and found it in the search results.
I have no experience with 1km wireless transmission.
Perhaps this other topic will contain some helpful ideas. I haven't read it fully. I just googled for "arduino 1km radio signal" and found it in the search results.