Alexa Smart Home: actual support for devices which are traditionally controlled by up/down or open/close switches
If you want to add the ability to, for example, control blinds in your smart home skill, the only option you have is the Alexa.PercentageController Interface.
This leaves you with the option to control your blinds by saying something like: "Alexa, set blinds to sixty". This feels very unnatural in our opinion. Wouldn't it be much more convenient to control such devices by saying: "Alexa, open/close blinds"? An optional "Alexa, stop" utterance could then interrupt the process.
iBricks Solutions commented
This is very much needed! please make this possible as soon as possible
Nick Madge commented
This is basic conversational functionality - I can't understand how this hasn't been made available yet. The community have been asking for this for 2 years+ !
If a "WindowShadeController"-like skill is added, raise and lower would also be nice commands to have.