How to change Android 7" Touch Brightness?

Hi,

Is it possible to change the brightness of the 7" Touch lvds screen (the one from the Udoo store) from within Android?

I've tried modifying the file /sys/class/backlight/pwm-backlight.0/brightness (after setting filesystem to RW) with values 0 (presumably screen off), 50, 100, 200, 255 etc but the brightness of the screen never changed.

I plan on using the Udoo and the 7" in my car, but would like a dimmed nighttime mode, as well as the ability to turn the screen off (with the understanding touch inputs will still be accepted!).

Interestingly, if I monitor the value of the file (by cat'ing it) and interact with the screen (swipe, select apps etc) the value switches between 5 and 102 - very strange!

Any ideas?

Thanks,
Mike

 

I am very curious to answers because I also want to use it in the car

 

I'm interested too for the same reason....

 

You know what guys? I think this forum is slowly dying. Because no one answered on users issues here and not just here I have some issue with my udoo 7" lcd- also no answer... Udoo bluetotth dongle? no answer again.. I´m starting to be disappointed of this

 

Is not dying , is dead already.

I tired looking for answers on other forums.

 

Is there now a way to change the backlight?

 

Hi there all,
the brightness is not handled by our Android.