How to control the brightness of the waveshare ESP32-S3-Touch-LCD-4.3

[mustafaakh10]

Hi,
I'm planning to control the brightness of a display using a slider widget. I noticed that in some examples, brightness control is achieved through PWM adjustments. Does anyone know how to do this using the ESP Display Panel library?

[t0menas]

Hi, had any luck finding an answer? I'm facing the same issue, couldn't find useful functions under board object. The only clue have for now is to try and access Backlight instance through
esp_panel::board::Board::Backlight like so:
auto backlight = board->getBacklight();
and then call it by
backlight->setBrightness(0.5f);
though I'm not yet sure how to use it.

[Lzw655]

Hi @mustafaakh10 @t0menas,

ESP32-S3-Touch-LCD-4.3 uses an IO expander to control the backlight. Currently, this method does not provide the function of outputting PWM.