Googling a bit I have found the answer to MessageSend, being http://wiki.linuxmce.org/index.php/MessageSend
which is described pretty good. I guess I can count on using that.
This brings me to another layer of this integration... device, category, templates, a bit confusing.
So a z-wave lamp controller for example would need to be known to the dce for that to be able
to control it, meaning it would need to be inserted into the database. Is this a complex
entity building for the z-wave lamp controller or does it conclude with some general record
describing the device?