A while ago Vera support recommended that any scene I include dimmers in I should set them to turn on to 98% instead of 100, but I can’t remember why. Something about the luup engine hanging. Anyone have any insight as to why or why not this is necessary?
It sounds like smoke and mirrors. What type of dimmers are you using? Are your scenes just sending a single SetLoadLevelTarget command or is there more going on?
One scenario that comes to mind is Leviton dimmers and Leviton scene/zone controllers.
Can’t they cope with 100%, then?
In user space we probably naturally think of levels being 0-100, i.e. 101 levels. In Z-Wave space there are 100 levels, 0-99. So a translation (unfortunately) needs to occur. I think MCV’s intention is to map user levels 99 and 100 to Z-Wave level 99. And vice-versa. (Which presents some interesting things when having scenes that use 99%).
IIRC, loosely, in certain cases (documented previously), Vera sends level 100 (untranslated, instead of 99) to the device. Presumably, this is an illegal value with undefined behavior. Leviton’s implementation appears to be to ‘do nothing’: light stays off.
(Thus, combining said artifacts, 98% is a ‘safe’ level.)
Yeah, I’m using a Leviton Vizia RF + 4-Button Zone Controller to trigger certain scenes.
I see. Yeah, stay with 98% then. If you use 100%, you may find that lights don’t come on. (I do not recall ‘hanging’ as a side-effect. Just that the scene does not do what you want it to do.)