General HowTo: Root Joying SC9853i Head Unit

[highkick05]

I was able to use the latest Magisk on my newer unit to patch my boot image. The newest Magisk doesnt seem to do much and I had to search through Magisk a bit to find the patching function but was able to patch my boot image. As far a signing the patched boot image,I thought I had it done correctly but upon trying to flash the signed boot image,the unit failed to flash it. I then used one of the pre-made patched images and it worked for me. Pretty sad when Magisk does absolutely nothing anymore lol.

Yeah this is the issue I ran into. Just continually getting errors with Magisk, no matter what version I installed on Joying unit.

 

[mastrv]

Yes, I've also read elsewhere that newer versions of Magisk do not work with my head unit which is similar to the Joying.

At one point I had Magisk installed and my head unit rooted. I then flashed a newer firmware and Magisk had updated to a newer version. The boot image patching no longer worked. I decided to not root my head unit and make the changes I wanted using another method. There is a thread in this forum that discusses this. The thread is "Modding your Joying/FYT SC9853i unit without root"

In any case, someone on the other forum, 4pda, discussed how to set up Magisk so that it updates or stays at the last version that worked. They indicate that version magisk version 20.3 is the latest that works and they were using MagiskManager 7.5.1 for installation. They indicated to go to Advanced Settings, select side channel and drive updates and use/enter the following after change hxxps to https:

hxxps://raw.githubusercontent.com/topjohnwu/magisk_files/5cd6569c6439fdf67f0261806927f89e304b5a6f/stable.json

So, whenever it checks for an update, it will not update Magisk and it will not update MagiskManager.

So, if you really want or need root, you can try the above yourself. I have not done this or tested it as I am happy with the changes I have made without rooting my head unit.

You should research this yourself. Anything you try or do to your head unit is your responsibility...as always

 

[Vinyvince]

Hello everybody.
I read again and again thoses 28 (interesting) pages but I think I need help.
I'm French and I buy a Joying 8.8 in May 2020 (EU-JY-HOS01N4GS-1) and I try many tips to resize screen (for a good use behind my Corvette C5 radio bezel).

-I try "direct" root method with file on post #33 of ojuniour but I've the red chinese message, the joying seems rooted but can't resize screen (and very slow).
-I try adb method with pc or special app with an other android phone but impossible to find the joying device.
-I try the developer.zip method but the installation of Magisk failed and I can't obtain a pached boot image.

Can you help me ?

(the only good thing is I can always do the update with original joying firmware and have a fully functional device)

Nobody to help me ?

 

[marchnz]

Nobody to help me ?

What is it you want to achieve

 

[Vinyvince]

Overscan my screen is my goal.
A modified update, a modified boots image, tips or how-tow are welcome.

 

[highkick05]

Strange. I will test tomorrow.
I don't use rooting anymore as it only reduces functionality of the unit, and and with the partial custom flashing almost all "root things" can be achieved as well.

Finally starting to understand what you meant with this post. I actually think you lose functionality after rooting.
Waze can no longer make any sounds, app problem? doesn't matter if radio or poweramp is running music/audio in background. Not sure what the issue is there?

Seriously think no use for root and I will be flashing the stock/original firmware back.
ADDIT: Actually tasker w/ autoinput will be my next endeavour. I think I could achieve more with that.

 

[surfer63]

ADDIT: Actually tasker w/ autoinput will be my next endeavour. I think I could achieve more with that.

If Tasker does not autostart afgter deep sleep, use FYTstarter to start Tasker which on its turn can do what you want it to do.

 

[highkick05]

If Tasker does not autostart afgter deep sleep, use FYTstarter to start Tasker which on its turn can do what you want it to do.

Does it need root or I am ok ?

 

[surfer63]

Does it need root or I am ok ?

It doesn't need root. It needs FYTstarter. See my sc9853i Q&A thread (note though that I didn't create FYTstarter)

 

[highkick05]

It doesn't need root. It needs FYTstarter. See my sc9853i Q&A thread (note though that I didn't create FYTstarter)

Tried it just then, is there a trick to using it?

 

[surfer63]

Tried it just then, is there a trick to using it?

What do you mean? Install it, configure it for your applications, and go.

 

[highkick05]

What do you mean? Install it, configure it for your applications, and go.

How long does deep-sleep take I mean.. I added my apps> I will give it an hour this time.

Is it limited to how many apps are allowed to be opened at one time . Think it is 5 or so in Developer settings?

 

[highkick05]

I have another unrelated question as well. Is it possible to get my Sony headphones pairing over bluetooth and listening to audio from my Joying headunit? I would have thought this would have worked quite easily. However, it appears as if the bluetooth was only designed to connect to a mobile phone for downloading contacts and for calls.

 

[highkick05]

The Sony headphones come up in Bluetooth pairing, I try to pair they just never successfully pair.

 

[surfer63]

The Sony headphones come up in Bluetooth pairing, I try to pair they just never successfully pair.

Yes. Almost all BT devices are visible, that is not the problem.
But it is hardcoded in the BT stack that you can only pair with OBD dongles and phones.

 

[highkick05]

@surfer63 wondering what apk's in the Allapp.pkg are responsible for mapping steering controls (eBay box soldered to back wires of unit).

 

[surfer63]

@surfer63 wondering what apk's in the Allapp.pkg are responsible for mapping steering controls (eBay box soldered to back wires of unit).

Mapping of steerting wheel keys: 190000000_com.syu.steer.apk
Reading of configured steering wheels keys: 190000000_com.syu.ms.apk

 

[highkick05]

Mapping of steerting wheel keys: 190000000_com.syu.steer.apk
Reading of configured steering wheels keys: 190000000_com.syu.ms.apk

CHeers, trying to mix New UI files with the old UI, due to control app not correctly triggering Home and Radio (AM FM) actions. The buttons appear to map and trigger other actions in the Control app. Seems to just be the app itself/probably that ms.apk will try that alone and see what happens

ADDIT: 190000000_com.syu.ms.apk fixes the steering controls, but is the same apk responsible for split screen, and now screen not half and half. more 35% / 65% (where it was with the clock embedded on the right) DOH !

I wonder if this setting can be fixed in the ms.apk

 

[weasel18]

@surfer 63 hey my unit has a system version date of 2020-04-09. 1024x600 unit.. i kinda skimmed through the thread, found your 2020-04-07.. and wonder if thats compatible?

 

[surfer63]

CHeers, trying to mix New UI files with the old UI, due to control app not correctly triggering Home and Radio (AM FM) actions. The buttons appear to map and trigger other actions in the Control app. Seems to just be the app itself/probably that ms.apk will try that alone and see what happens

ADDIT: 190000000_com.syu.ms.apk fixes the steering controls, but is the same apk responsible for split screen, and now screen not half and half. more 35% / 65% (where it was with the clock embedded on the right) DOH !

I wonder if this setting can be fixed in the ms.apk

Split screen is functionality from Android itself. The ms apk or any other FYT apk has nothing to do with that.
50%/50% or 33%/66% is determined by the layout set from the apk. Most apks only support 50%. Some apks have layouts that can work on 50% or 33%, or even other layout widths/percentages.
If you have a 33%/66% screen layout, you should be able to drag the separation bar to 50% and back again.