> Yes. That's true. RF modules usually need sometime to "power-up" or > "lock-on" to the data first before actually receiving the data correctly. I > think it's a pain to have to send some data (preamble or something like > that) first to activate those RF modules, and then, send the data. Not to > mention if your data has a lot of simultaneous '1' (try sending 0xff, the RF > modules will really mess this one up). Hmm. I dont think FF is a good preamble obviously because it is so uniform.. better to use something like 0xE5 or 01010101 etc.. something where there is a variance and something you can lock on to. Jon B. -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics