The reason I wouldn’t want to think of doing this through the SmartThings app itself, is because it’s way too cumbersome to use the native SmartThings app for anything daily-UI-related. It’s fine for configuring stuff (OK, maybe not really ‘fine’, but it works lol), but not for daily usage.
For my wall-mounted control panels, I use SmartTiles, but for this, I guess I was thinking a simple text message or something else that could be displayed on the lock screen would be doable and not even have to do anything with the phone other than look at it to get the passphrase or something like that.
Also, if I did it in the car before walking up to the door, I could just speak into the air in the car (I do this all the time for other things, like weather forecast, driving directions, etc without having to even touch my phone at all), and have it speak the passphrase outloud to me and then I’d just need to remember it long enough to still have it in mind when I get to the front door (and each unique passphrase would be time-limited, of course).
I don’t know…I guess it’s just too much to try to get out of this thing at this point, and I will just wait until they have something figured out.
Meanwhile, I may do some testing and experimenting with Tasker/SharpTools/AutoVoice (and/or other methods I have heard mentioned lately) to see how well I can get voice interaction working without the Echo at all (since I will already have wall-mounted Androids in every room of the house anyway). I know I still may not be able to get a good, secure way of doing it for things like security systems, door locks, etc for a while, but oh well.