banana pi accessories manual download link:
https://drive.google.com/folderview?id=0B4PAo2nW2KfnQy0tVE1iVmNsRFU&usp=sharing&tid=0B4PAo2nW2Kfndjh6SW9MS2xKSWs
we now update all document on gitbook:
https://bananapi.gitbooks.io/bpi-accessories/content/