I would like some ideas on the RF side of things. My requirements are: 1) Low power RF transmitter and receivers. Transceivers would do nicely for both ends depending on cost. 2) Able to transmit low rate date 38kbps. 3) Distance between nodes should be > 100m. I have seen these before: http://www.lprs.co.uk/main/products.php But the cost is expensive. The RF solution is entirely implemented on the silicon is preferable. A package like easy radio is okay with me. Thanks, John Chung __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist