Trouble with Arduino - "Please select a port before upload"

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@Chris_Woods, @jrcwest, @jbobrow

Evening guys.

I’ve come up with a workaround that will work on a machine with no COM ports:

  1. On the Arduino IDE menu, navigate to File -> Preferences (or hit [Ctrl] Comma)
  2. The Preferences dialog will appear and, near the bottom of that dialog, it will show you the full path to the preferences.txt file itself.

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  1. Click on the full path to the preferences.txt file and the Arduino IDE will open a file browser window showing you preferences.txt
  2. IMPORTANT: Shut down the Arduino IDE app now.
  3. Open the preferences.txt file in your favourite text editor, and edit it as follows:
    — Set the value of the serial.port setting to COM1

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  1. Save the changes and exit from your text editor.
  2. Restart the Arduino IDE and try an upload to your Blink tile. It should work with no errors.

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Let us know how you get on!

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