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An error that is generated during the compilation phase, often due to problems with invalid syntax and/or types. Not for errors during the uploading or execution phase.

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1 answer
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Why can't my IF statement see a global?

I'm rather new to Arduino programming. I have a problem compiling the following bit of code: const int relay1 = 10; //Power Relay 1 const int relay2 = 11; //Power Relay 2 const int relay3 = 12; // …
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