Has anyone seen this ? I do not remember to have seen it mentioned here. Is it patent encumbered ? Looks good to me, and very PICable (bit banging etc). I have experience with 55-150kHz carrier current signalling, it should work great for many purposes. http://en.wikipedia.org/wiki/RuBee Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist