When you try to upload code to the Brain Board, you may get an error that looks something like this:
avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00
This error means that the Arduino software is having issues communicating with the Brain Board.
1. Try connecting the Brain Board to another USB port on your computer.
Once you connect the board to a different port, you'll need to let the software know so that it doesn't get confused. In the Arduino software, go to the menu at the top of the window and select Tools > Port > Arduino/Genuino Uno.
2. Make sure that the correct board type is selected
If you accidentally changed the board type, this could also cause issues when trying to upload code. Go to the menu at the top of the window and select Tools > Board > Arduino/Genuino Uno.
Once you have completed these steps, try uploading the code again by clicking on the button with the right-facing arrow at the top-left of your window.