As an aside, CU-Wireless has been working on a low level protocol to do this sort of thing. http://www.cuwireless.net/ http://www.cuwireless.net/downloads/ETXprotocol.txt It's apparently working too. Download and try! To unsubscribe: send mail to majordomo at wireless.org.au with "unsubscribe melbwireless" in the body of the message