Installing libraries and how to write a library for Arduino

Libraries are files written in C or C++ which provide sketches with extra functionality, for example the ability to control an LED matrix, read an encoder, connect to a sensor, display, or module, etc. They are very useful to lower the barriers for creating amazing interactive projects and use a wide range of components. Libraries can be created by everyone and shared with the open source community! To use an existing library in a sketch you can use the Library Manager (available from IDE version 1.6.2), open the IDE and click to the “Sketch” menu and then Include Library > Manage Libraries and follow the Guide on this page.”

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