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• There is this article in Hackaday that shows on how to have a GPIO to have multiple functionalities.
• For example, the case here would be that a button can have 2 or more function instead of just one.
• Here is the link to the article, http://hackaday.com/2016/11/18/only-one-button-no-problem/.
• Here is the link to the YouTube video, https://www.youtube.com/watch?v=67rrjdR3EmI.
• Here is the screenshot of the article.