This is probably an easy one but I can't seem to figure it out..
I'm working on a driver that sets several attributes (side-note -- I'm not sure what the official term is -- attribute/state/event?)
I have a driver setting which controls if HTML attributes are set or not.
Put simply, there's a check in the driver code which will set the attribute/event.. like this:
if (showHtml) {
sendEvent ( name: "html", value: "some long string value..." )
}
However, I quickly noticed that if I disabled the 'showHtml' setting, the existing attribute will persist and never get cleared.
I'd like to clear/remove it if possible.. so, I updated my code to this:
if (showHtml) {
sendEvent ( name: "html", value: "some long string value..." )
} else {
sendEvent ( name: "html", value: null )
}
However, even this doesn't seem to 'stick'. The image below shows the 'html' attribute (notice the "Mon May 29" in there.. that's when it was last updated -- probably when I disabled 'showHtml')
Yes, the value of 'html' will change to 'null'.. but, it'll revert back to this if I refresh the page.
So, is there another way to 'clear' out an attribute?