A very nice discussion, raised by my question.
But in my opinion quite useless for what I asked.
I don´t know Arduino.
And all the discussion did not show a solution. Is there any working wireless system, and if yes, usable for N scale (1/160 ) ?
Of course I could steer a loco via RC. But only one. And nothing else, such as sounds, lights etc as shown with the BlueRail system.
Roland