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 Edited by damo503 at 2019-9-19 05:34  
 
I can confirm that this method work on OPI PC Plus with android 7.0 Beta from http://www.orangepi.org/downloadresources/ 
thanks n2rayr, I needed to make some changes to make it work, this the method that I used, I hope that it can help to someone too 
(you can break your device, used it on your own responsability) 
 
On Opi Pcplus 
Boot your Orange Pi Pc PLus with android 7.0 Beta installed 
donwload and install magik manager from XDA repo https://github.com/topjohnwu/Magisk/releases/ 
Turn on Settings -> Developer options -> USB0 device mode enable 
 
On your pc with windows 10  
If you don't have adb Android SDK plataform-tools donwload it for example from https://developer.android.com/studio/command-line/adb?hl=es-419   
unzip it and paste all the files where you want for example C:\tools 
Connect your OPi PC PLus from otg usb port to your computer  
open cmd as admin 
type "cd \" to go to C:\ 
type  "cd tools" or somewhere you have the adb tools (in my case C:\tools)  
Type "adb shell" to get in the android terminal 
Type "dd if=/dev/block/by-name/boot of=/sdcard/boot.img" to dump boot.img for Magisk 
Type "exit" to get out of shell 
Type "adb pull /sdcard/boot.img" to copy the boot.img out  
now you have boot.img on your pc in the directory c:\tools,  
keep one copy of the file in your pc if you want for some reason unroot your device 
Now put boot.img into USB stick and put the stick on your Opi PCPlus 
 
On Opi Pcplus 
Open Magisk manager apk and click on the first "Install" and select "INSTALL" again , then select "patch Boot Image File" 
Choose the boot.img from USB then wait until it shows done 
when magisk show done, take note about route of the file patched, in my case /storage/emulated/0/download/magisk_patched.img 
Now close Magisk and connect again if you unplug it your OPi PC PLus from otg usb port to your computer 
 
On pc 
Type in you cmd again "adb shell" to get in shell mode again 
Type "dd if=/storage/emulated/0/download/magisk_patched.img of=/dev/block/by-name/boot" to write the boot.img back 
Type "exit" once finished 
Type "adb reboot" to reboot your board and wait that the Opi Pcplus boots again 
Now it's rooted 
 
  
 
 
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