Read the statement by Michael Teeuw here.
PIR, radar or camera IR filter or not for controlling mm on/off
What is your preferable choise?
Read about different modulen with different problems.
Would like it behind the mirror glas, suggestions.
I’ve installed the Pi camera behind the mirror and it allows motion detection to turn on-off the monitor.
As suggested by Bhelper I start it with pm2 and the result is just … perfect!