Hi Klaus K, thanks for the reply.
I try to better describe my request, it is about sending Boolean data (or 1 byte) in practice the logic state of two digital signals, a photocell and a reset button from the first to the second Arduino. Minimum operating distance 200 meters, as regards the transmission speed it must be as high as possible, because the photocells command a chronometer where the precision of 0.1 seconds is required. I read from the datascheet of the bluethoot module that the maximum range is 500m meters I hope to reach 200. For now the connections are via cable, for convenience we would like to remove the cables. Another request is the absence of external antennas to the container of the photocell / button, in fact I was thinking of the BLE because it has an integrated antenna. Power supply via 12V lithium battery.