Interesting question. So to be honest i am not sure, I know that the LUX for example is a device.capability (in the code: capability “Illuminance Measurement” ) but the weather conditions is an attribute (in the code: attribute “weather”, “string”). I am not sure if ST is giving the capability to pickup attributes. I can do a little research but it might take a while. Someone else might be also able to answer here or if posted in the developer sub-forum?