Have an ultrasonic sensor on top of my monitor that's used as a presence sensor to tell the computer when I’m in front of it or not. Pauses the music player wh

Have an ultrasonic sensor on top of my monitor that's used as a presence sensor to tell the computer when I’m in front of it or not. Pauses the music player when I walk away and starts again when I return. More details here: https://www.michevan.id.au/posts/are-you-there/ https://www.michevan.id.au/posts/are-you-there/