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→Usage of GPIO and WiringPi
b.Download the latest source code <br>
You could download the latest WiringPi source code from official website:<br>
http://www.orangepi.org/html/serviceAndSupporthardWare/indexcomputerAndMicrocontrollers/service-and-support/Orange-Pi-2G-IoT.html<br>
<br>
You could also download files from github: <br>
