Automation Hat Mini - accessing backlight

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1

I would like to turn off the display backlight based on the ambient light. I can see the backlight is mapped to GPIO 25. How can this pin be controlled ?

2

You can use RPi.GPIO to control the pin. Pull it low to turn the backlite off. If you want to control the brightness you will have to use PWM.

3

thanks, does that mean I need to import RPi.GPIO lib or is it included in automatiohat ?

4

Yes you would have to import RPi.GPIO. It would go something like this. I’ve only ever used it with a pin set as an input to detect button presses.

import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)  
GPIO.setwarnings(False)
GPIO.setup(25, GPIO.OUT)
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