user30712: For those who use the IDE Platform IO, I have an issue for you. I use to program a home application of sensor reading and use the library "JC_Button.h" to manage buttons. There are other third-party libraries, but this in especial is cumbersome. The project tree is shown below.
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The compile log of the build is here. I have few notion of what is happening. In my opinion, the project does not find the necessary lib.
Thank you in advance.

user48028: It looks like you are not telling PlatformIO that you need the JC_Button library. Try adding this to your platformio.ini file:
lib_deps = https://github.com/JChristensen/JC_Button


30712: <p>For those who use the IDE Platform IO, I have an issue for you. I use to program a home application of sensor reading and use the library "JC_Button.h" to manage buttons. There are other third-party libraries, but this in especial is cumbersome. The project tree is shown below.</p>

<p><a href="https://i.stack.imgur.com/moXcM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/moXcM.png" alt="project-tree"></a>.</p>

<p>The compile log of the build is <a href="http://codepad.org/x3uVz30U" rel="nofollow noreferrer">here</a>. I have few notion of what is happening. In my opinion, the project does not find the necessary lib.</p>

<p>Thank you in advance.</p>
 48028: <p>It looks like you are not telling PlatformIO that you need the JC_Button library. Try adding this to your <code>platformio.ini</code> file:</p>

<pre><code>lib_deps = https://github.com/JChristensen/JC_Button
</code></pre>
