Port Identification: Windows

Run the Arduino IDE, either using a desktop shortcut or the Start menu.

From the Tools menu in the Arduino IDE, select Serial Port. You will see one or more COM ports with different numbers. One of the ports will probably say Arduino/Genuino Uno following the port name. This is the one to select.

If none of the ports say Arduino/Genuino Uno following the port name, there is an alternative way to identify the correct port:

1. Make a note of which numbers are available.
2. Unplug your Arduino from your computer, look at the list of ports again, and see which COM port vanishes. Plug your Arduino back in and select the port that appears.
   (It might take a moment or two for the port to vanish, and you may have to leave the Tools menu and open it again to refresh the list of ports.)

NOTE

If you have trouble identifying the COM port used by your Arduino Uno, see “Identifying the Arduino COM Port on Windows”.

Once you’ve figured out the COM port assignment, you can select that port from the Tools→Serial Port menu in the Arduino IDE.

You’re almost done! The final thing you should check is that Arduino is configured for your type of board.

From the Tools menu in the Arduino IDE, select Board and select Arduino Uno. If you have a different board, you’ll need to select that board type (the name of the board is printed next to the Arduino symbol).