Hi,
Long time ISY user, first time poster...
I've had luck triggering Alexa routines with state variable defined as contact sensors. I have not tested motion sensor triggering. BUT I didn't get off to a good start!
The routines refused to say custom phrases like "Right garage door has been opened" but would say canned messages like "Hello". It took two trouble tickets with Amazon to rectify this problem. BTW Amazon never contacted me, custom phrases just stated working shortly after submitting the second ticket.
Even after this issue was fixed the routines would randomly not work. I moved away from using the routine action "Alexa says" and started using send announcement under messaging and have had much better luck.
I agree this is an Amazon issue but I recommend trying canned messages in your routines to rule out the custom phrase issue I had. Maybe using contact sensors instead of motion sensors might be an idea as well.
Good luck getting Alexa talking with ISY.
I love mine telling me;
..My wife will be home soon (just broke a 1KM geofence)
..It's 10:00 pm and the garage door is still open, should it be closed?
..Patio door open time has been exceeded, heating and cooling paused.
..Zoe, it's time to cleanup and get ready for bed! (I used ISY to take advantage of day of week programming) vs. less flexible Alexa routine programming.
..Verbal leak sensor warnings.
and many more.
