Screen backlight operation

Required header files
```
#include "utils/BrightnessHelper.h"
```

Dimming

Adjust the backlight brightness
The brightness range is 0 ~ 100 (Note: 0 does not mean turning off the screen)
```
//Adjust the screen brightness to 80
BRIGHTNESSHELPER->setBrightness(80);
```
Get the current brightness value
```
BRIGHTNESSHELPER->getBrightness();
```

Switch screen backlight

Turn off the screen
```
  BRIGHTNESSHELPER->screenOff();
```
Open screen
```
  BRIGHTNESSHELPER->screenOn();
```

Memory brightness

When the system is turned on, the default is to memorize the last adjusted brightness value. If you want to modify it to not remember the brightness or set a fixed brightness value, you can open the properties of the project to modify:

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