Hi, actually to pass some macro at compile time I’ve edited the build_flags variable in my platformio.ini like this: build_flags = -D MACRO1=value1 -D MACRO2=value2 ...[other macros] The problem is that I have to edit the platformio.ini file every time I want to change one of these macros. It …

Well a third way to do it would be to write a python script to inject the defines. See docs . But either the first or second way are nicer than this complicated third way…

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Define build flag "on the fly"

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pfeerick March 23, 2019, 10:07pm 6

And don’t forget, an edit to platformio.ini triggers a full rebuild, so either having the compile-time change done by choosing a different [env:] to build or header file would be quicker, as it would require only minimal re-compile.