Learn LVGL course, Module 2.3 – The LEDs stay always ON, never change state.
I have actually added the following code to the end of the callback function of the button to check if my board is responding and switching the LED status:

    digitalWrite(CYD_LED_BLUE,0);
    delay(500);
    digitalWrite(CYD_LED_BLUE,1);
    delay(500);
    digitalWrite(CYD_LED_BLUE,0);
    delay(500);

 
The LED blinks correctly, but does not stay OFF at the end, even when I turned it off (as you can see in the last “digitalWrite” sentence in code above).
 
Is there something in the LVGL library that forces outputs to be 1 (HIGH) ? or what is wrong/missing in the code of the example?
 
Thanks in advance for your help