Settings screen brightness with RPI.GPIO

[Patrick]

Hi,

I just tried to set the brightness of my screen using python and RPI.GPIO but it looks like that this kills the driver…

Here is my Code:

try:
    import RPi.GPIO as GPIO
except RuntimeError:
    print("Error importing RPi.GPIO!")
    debuggerprint("Error importing RPi.GPIO!",1) 
LCDBrightnessPin = 22
GPIO.setmode(GPIO.BOARD) # Set to GPIO Name Mode
GPIO.setup(LCDBrightnessPin, GPIO.OUT)
p = GPIO.PWM(LCDBrightnessPin, 100)
p.ChangeDutyCycle(60)

The code compiles fine, but when I load it I get “Warning this Channel is already in use [blabla]” and the Screen is still at 100%.

After I kill the application the screen turns black completly, but just a black picture, the Backlight intensity doesnt change. I then have to reboot the Pi to get the screen back to live.

Any suggestions?

Thanks!

Patrick

EDIT: Fixed it, hat to use Pin Number 15 instead of 22 🙂

[Author]

Posts