Howto: Rooting DJI Crystal Sky

CantRepeat wrote:

Hello,

I followed the instructions and used ES Explorer Pro, but NLD GO 4.1.22CS icon disappears.

I'm about to root my CS but have a question before I move forward.........

Once the CS is rooted and working, how do I revert back to it's original state? Do I just re-flash with the DJI firmware??

I've followed all the steps in here but my custom CS GO4 app still keeps disappearing at random times.

I used the Pro version of ES File Explorer as detailed too.

Some times the app stays present for many reboots of the CS and will be there for a week or so, but at other times it disappears the very next day.

When I run this command:

su -c "pm enable dji.pilot.pad"

The app comes right back and I'm good to go again.

Can I set something up that will run that command each time the CS boots up?

For all you guys still having issue with the NLD app icon not staying persistent through reboot, try this pls.

adb shell
su
cd /
cp /data/data/dji.system.launcher/shared_prefs/dji.system.launcher.xml /mnt/internal_sd/Download/
cd /mnt/internal_sd/Download
ls
verify dji.system.launcher.xml is present
exit
exit
adb pull /mnt/internal_sd/Download/dji.system.launcher.xml
 
verify dji.system.launcher.xml is on your PC
 
close the bash shell!!
 
edit dji.system.launcher.xml with notepad++ on your PC
 
add the line <string name="KEY_MUTEX_PREF_PKG">dji.pilot.pad</string> so your xml file looks something like this.
 
NOTE: if you have <string name="KEY_MUTEX_PREF_PKG">dji.go.v4</string> just edit dji.go.v4 to dji.pilot.pad
 
Do NOT copy and paste the text below, edit your file.
 
<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
<map>
    <int name="KEY_APP1_INDEX" value="2" />
    <int name="KEY_APP2_INDEX" value="2" />
    <string name="KEY_MUTEX_PREF_PKG">dji.pilot.pad</string>
    <long name="KEY_BOOT_CNT" value="18" />
    <int name="KEY_F1_INDEX" value="0" />
    <string name="KEY_TRAFFIC_USED_TIMESTAMP">2019-04-14</string>
    <long name="KEY_TRAFFIC_USED_TOTAL" value="214388073" />
    <long name="KEY_TRAFFIC_USED_TODAY" value="26259130" />
    <int name="KEY_F2_INDEX" value="1" />
</map>
 
save the file
 
Now back on your CS in a terminal window and get root use this command to unhide the NLD app
 
su (pop up from SuperSU, grant access)
 
su -c "pm enable dji.pilot.pad"
 
verify you can now see the NLD APP icon in applications
 
start a NEW bash terminal and transfer the edited file
 
adb push dji.system.launcher.xml /mnt/internal_sd/Download/
 
now open a shell and move the file
adb shell
su
cd /
mv -f /mnt/internal_sd/Download/dji.system.launcher.xml /data/data/dji.system.launcher/shared_prefs/
 
reboot your CS and verify the NLD APP is still in the apps menu.

Thanks for the reply @CantRepeat :)

When I type:

su

It pauses for around ten seconds, then I get a response like so:

C:\adb>adb shell
shell@zs600b:/ $ su
1|shell@zs600b:/ $ 

Is that right?

Then when I try to copy the file to the memory card I get a "Permission denied" error:

cp /data/data/dji.system.launcher/shared_prefs/dji.system.launcher.xml /mnt/internal_sd/Download/

But, if I put `su` in front of the copy command, then it works:

su cp /data/data/dji.system.launcher/shared_prefs/dji.system.launcher.xml /mnt/internal_sd/Download/

After I have edited the file locally the same thing happens when I issue the `mv` command to move the edited file from the SD card back to internal, I get a Permission denied error.

But if I put `su` in front of it again then it seems to work:

su mv -f /mnt/internal_sd/Download/dji.system.launcher.xml /data/data/dji.system.launcher/shared_prefs/

I've rebooted the CS a few times and it's still there, I shall let you know if it sticks :)

Thanks again!

No, not really.

Did you run the root script at the beginning of the guide?

When you adb shell it puts you in the shell and when you su it should give you root.

Are you seeing a prompt in SuperSU on the CS? I would check the to make sure SuperSU is granting permission to adb shell.



BUT, the end result is that you have a persistent NLD icon after reboot.

You can also use ES File Explorer Pro in root mode to check the /data/data/dji.system.launcher/shared_prefs/dji.system.launcher.xml and see if dji.pilot.pad is still in the xml after a reboot.

If it is there it's a good chance it will remain there.

Hmm - no, there is no ADB Shell listed in my SuperSU.

There are apps listed in there that I have granted root to previously  (ES File Explorer, Terminus, Notepad) but that's all.

You know what I was doing wrong?

I was not looking at the screen of my CS while doing this...

I looked in the logs of SuperSU to see lots of failed requests from 'adb shell' - that's why it seemed to hang for ten or fifteen seconds, the console was waiting for me to approve the request on the CS!


D'oh!

Thanks for your help man!

CantRepeat wrote:

Confirmed, after a reboot the dji.pilot.pad is still present in that file after several reboots.

Thanks again!!

Richie wrote:

Yeah whenever something request root access SuperSU will pop up a notification for you grant access to.

Glad you got it working.

Updated the missing app icon and android ID parts of the guide.

I added a guide on how to make a backup of your CS's system image file and suggest you make one before you do something to make it impossible to do so.

You now have root access on your CS so you need to make a back of the system by making a system.img file.  Go to the link below and just do it!!

https://nolimitdronez.com/boards/topic/266/howto-backing-up-your-dji-crystal-sky-system-image