Hi team. I want to make a product that uses an RF remote switch (long distance) that can switch one of two lights on remotely and that light transmits the same signal to the next light and there might be up to 10 or more lights across a distance such as 2 or 5 km. Anything off the shelf that can do this? Ideally 12v

 

the answer is LoRa... there are ready modules for things like 10-20miles in the open...