Yes, but the attitude just rubs me the wrong way. If they suggested the voltage divider, it would have been a good opportunity to instill careful engineering and testing practices. They could have said something like &quot;this will fry your GPIO if you accidentally send 18v, so make sure to test the circuit with a multimeter or scope!&quot; Instead, they suggest throwing an expensive part at the problem, supporting the attitude that you can&#x27;t trust your own engineering. At least they mention that there are other ways to do it.<p>I dunno, maybe it&#x27;s two different, equally valid attitudes. I guess I dislike it for the same reason I prefer C++ over Java.