Ultrasound Motion Detection Isn't Working as Expected

How to troubleshoot if a routine or service using ultrasound motion detection isn't working.

Make sure that your device isn't on mute.
Make sure that your Occupancy Routine is active. In the Alexa app, open More and select Routines, then find your occupancy routine.
Let your routine reset its Presence state by preventing interaction with your Echo device for at least 30 minutes. Make sure that your microphone is off.
Background noise in the room, including music playing on your Echo device or other speakers, can impact Ultrasound Motion Detection accuracy.
Make sure that there’s nothing near the device that blocks the ultrasound and interferes with the device’s ability to detect people.
Move your device closer to where you expect motion to occur.
Ultrasound Motion Detection best perceives "major" motion, such as a person walking. "Minor" motion, such as reading a book or working at a computer, may not register as occupancy.
Make sure that Ultrasound Motion Detection is on. In the Alexa App, check the device settings for your Echo device.