It must be either because its late or that I'm getting old but my brain just wont get into gear.
How do you monitor if something is on or off, looking on the bwired site it mentions the Xanura devices quite a lot.
My thoughts is does the device wire behind the normal switch and just monitor current being drawn etc ? Thus knowing if a device is on or off. Then it sends a signal via X10 stating its status.
Can you then send a command to the xanura device to get it to turn the device on as well or it is simply a monitoring type device ?
Hopefully I've not sounded too dump
The device remembers it state, On, Off or a DIM value. When I for example dim my lights on in the bedroom, the device sends it state (extended code) as well as device on. When i dim the lights off, again it sends it state, as well as a device off. Additionally you can use extended code to query the device any time.