Thanks again for your advice, I had tried it before with direct cable connection when I began tinkering with this and it did work. But sometimes I would get the relays to turn on and off kind of a quick chattering. I have the flyback protection on my relays to help prevent that. Then I notice that after reading other peoples questions about using rf links and having similar problems that Manchester encoding/decoding seemed to resolve this issue. This is why I am trying to experiment with this. Perhaps I may learn from this experience. I am really interested in become proficient with PicBasic Pro, and Bruce has help me alot over the last couple of years. I hope he gets time to publish a book that has clearer examples than the PBP manual has. People like you, Bruce, Melanie and Ioannis are a real asset to this forum. Thanks again for all your help.