Is there any internal event in the home assistant that can trigger the bright screen of the specified tablet computer? The tablet computer is an Android system. It has already followed the HA app. I am ready to use it as the central control screen of the smart home. I hope you can give me some advice. Thank you!
Do you have a nearby motion sensor?
Turn the brightness up when motion is detected and off after no motion for x minutes.
To control the tablet you may need this:
Fully Kiosk can detect presence via the android’s camera and adjust the brightness.
I think Wallpanel does too. 
Thank you. It has been tested. However, this is not perfect. I also have a human body sensor, but I don’t know how to trigger the smart screen of the Android flat screen in the door through ha
Thank you for your help. I think I can try it
I am also using browser mod to popup my camera when someone rings the bell … but on my tablet running Fully Kiosk, when unused for a certain time, the screen is black (motion detection is set).
When someone rings the bell, is there a way to activate the screen of the tablet (others it stays black, and I need to do in front of the tablet to activate the screen and see the picture …)
Many Thanks !