Hi,
Welcome to the forum.
Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html
Can you post a block diagram of what you want to do?
How far are the stations apart?
Is it in an industrial environment?
Is there any EMI to deal with?
Can you please tell us your electronics, programming, Arduino, hardware experience?
Thanks.. Tom.. 