ofxGPIO
                                Library C++ for raspberrypi and orangepi, GPIO interfaces compatible with openframeworks.
                            
                        How to download and setup ofxGPIO
Open terminal and run command
                                            git clone https://github.com/kashimAstro/ofxGPIO.git
                                        
                                        git clone is used to create a copy or clone of ofxGPIO repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with ofxGPIO https://github.com/kashimAstro/ofxGPIO/archive/master.zip
Or simply clone ofxGPIO with SSH
                                            [email protected]:kashimAstro/ofxGPIO.git                                    
                                    If you have some problems with ofxGPIO
You may open issue on ofxGPIO support forum (system) here: https://github.com/kashimAstro/ofxGPIO/issuesSimilar to ofxGPIO repositories
Here you may see ofxGPIO alternatives and analogs
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