Amazon adds Ultrasound Motion Detection to select Echo speakers

Amazon has added the ability for 4th-gen Echo and 4th-gen Echo Dots to detect occupancy in a room by emitting an inaudible ultrasound audio wave. The capability can be used to automatically trigger Alexa Routines when you enter or exit a room. When configuring the trigger of a routine, select “Smart Home” and then select the appropriate Echo to be given the option to trigger the routine when “People are detected” or when “People aren’t detected.” You also have the option of enabling or disabling ultrasound motion detection altogether for each compatible Echo device. This is done under the device settings of each Echo within the Alexa app.

  1. I have tested this on my Echo Dot 4th gen and Echo 4th gen and found that will the “person detection” is fast, the “person not detected” takes 30 minutes

  2. Charlie says:

    What about configuring an alarm, so that if there is motion detected at some place in the house while you are asleep Alexa plays a loud alarm to alert you? You can disable the alarm as you enter that room in the morning.

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