Why can't I #include ".inc" files?
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Hi @chriscurl. The supported filename extensions for Arduino sketch code files are listed here in the Arduino Sketch Specification:
https://arduino.github.io/arduino-cli/latest/sketch-specification/#additional-code-files
You must use those supported file extensions.
There are many different file extensions you'll find in various corners of the C++ world. Arduino only supports the most prevalent of those for use in sketches.
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