Able to compile, but not upload The board is BTT SKR v1.1.
I know the board is connected with COM3. I get the Avrdude 500 timeout.
I am using VS Code, and am close, but need to know exactly what changes to make in config/adv.
I have both the BTT SKR PRO v1.1 and the BTT SKR mini v1.1 (it is unclear which is meant by the OP), and for both you do not upload over the USB, you compile the software into a firmware.bin file which you place onto the microSD card. Once you power the board, the new firmware file will be installed onto your board.