@davekw7x , yes after boot mode all comes back to the operation. I tried to change to pin 2 - same result.
with regards to 4,7k resistor - in the it says it is already inside of the item.
i will continue to dig then.
Arduino pin 12 is actually CPU GPIO pin P0.06, which is connected to the cathode of the Blue part of the RGB LED.
is there any comparison table Arduino Pin X = Pin Xiao=Pin Xiao expansion board?
@leroyle - yes i am using XIAO expansion board, will try to run the code on breadboard today, let’s see the result.
thank you all, will keep trying to find the solution