I have my custom built 3d printer working quite nicely now with Marlin and RAMPS, and the RGB LED support is great since getting it working with help on this forum. What I would like to do is have the LEDs start fully on white. I have seen that I can load custom boot up gcode using an SD card, but I don't have access to the SD slot and it is disabled in my firmware build. Is there another way to add either custom gcode or set the three pins to 255 as it boots? I assume that there will be a function that is called that sets pins to the expected states and perhaps I can add the commands in there, but I am not entirely sure what I am looking for. Does anyone have any tips, please?
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