Need Wyse cam v2 or motion sensor to trigger alarm on Android phone

New to Wyse and these kinds of systems.

My son is a sleepwalker. I need to know if he comes downstairs at night. (He can walk downstairs, turn on the gas stove but not realize the ignition didn’t catch.)

So I want either the motion sensor or the camera (v2) to send notification to phone that, basically, play an alarm sound.