First make sure that all instances of the Arduino IDE are closed. The IDE only scans for libraries at startup. It will not see your new library as long as any instance of the IDE is open!
Download the Zip File
Make sure to select a released version of the library. Some library repositories are still in development, and may contain unreleased or untested code. The "Releases" button takes you to the tested and released versions.
- Click the "Releases" button on the Github repository page to find the released version of the library.
- Then download the zip file.
Drag it to your Libraries FolderOpen your sketchbook Libraries folder and drag the master folder from Downloads into it.
Give it a Legal NameThe IDE will not recognize folders with dashes in the name. So you must rename the Github Master Folder. Underscores are OK!
Re-start the IDERestart the Arduino IDE and verify that the library appears in the File->Examples menu.
Load one of the library examples to test.