Database Users

Rooting a Joying JY-UM138P2 Headunit (unclear if MTCC MTCD MTCE)

Hey guys,
I recently bought a Joying headunit (JY-UM138P2) and I am wondering if there is a way to root my device.
I tried Kongoroot and it failed. Joying Extra Tools won't work beacuse it is not a Sofia Model. And as far as I can tell there is no custom firmware for this model availabile.
Android Version: 6.0.1
CPU: ARM Cortex A53 eight-core 2+32GB PX5, GPU: PowerVR G6110
Info on System: APP 1024*600 2017-01-11 19:13:52
MCU Version: 2017-11-06 17:57:54 JY_(R68)__26_C26_6026_CAN(All)
Which is the main problem as I cannot tell from this if it is an MTCC, MTCD or MTCE unit.
In general I actually do only want to have read and write acceess to the system/media folder to be able to switchout the bootanimation.zip for a custom one that I created.
Thank you!

MrAbstoss said:
Hey guys,
I recently bought a Joying headunit (JY-UM138P2) and I am wondering if there is a way to root my device.
I tried Kongoroot and it failed. Joying Extra Tools won't work beacuse it is not a Sofia Model. And as far as I can tell there is no custom firmware for this model availabile.
Android Version: 6.0.1
CPU: ARM Cortex A53 eight-core 2+32GB PX5, GPU: PowerVR G6110
Info on System: APP 1024*600 2017-01-11 19:13:52
MCU Version: 2017-11-06 17:57:54 JY_(R68)__26_C26_6026_CAN(All)
Which is the main problem as I cannot tell from this if it is an MTCC, MTCD or MTCE unit.
In general I actually do only want to have read and write acceess to the system/media folder to be able to switchout the bootanimation.zip for a custom one that I created.
Thank you!
Click to expand...
Click to collapse
That's an fyt SoM... Solutions soon? Standby

MrAbstoss said:
In general I actually do only want to have read and write acceess to the system/media folder to be able to switchout the bootanimation.zip for a custom one that I created.
Click to expand...
Click to collapse
So far the Joying units were rooted on linux/adb level.
So if you can make an adb connection over WiFi to your unit, you already have root terminal access via adb.
That is enough for doing what you want.

Well, so far I managed to establish an ADB via wifi connection (without using an usb cable, as I dont have a male to male usb cable).
But it lists my headunit as an unauthorized device.

MrAbstoss said:
Well, so far I managed to establish an ADB via wifi connection (without using an usb cable, as I dont have a male to male usb cable).
But it lists my headunit as an unauthorized device.
Click to expand...
Click to collapse
Try this

MrAbstoss said:
Well, so far I managed to establish an ADB via wifi connection (without using an usb cable, as I dont have a male to male usb cable).
But it lists my headunit as an unauthorized device.
Click to expand...
Click to collapse
Hello, I just got my new HU (same as yours) I was able to root with kingoroot over usb adb. Go to Developer options (pw 3368), In the top right corner, underneath the back button is a menu icon. Tap and then tap "USB computer connection." Then select the bottom option. I believe only the left side USB will work (when facing front of HU) and you may need to toggle the USB debugging switch. Windows, adb based kingoroot will work.
Only problem, root will not stick after reboot...I was able to install xposed framework, and install xposed Additions. Additions still works after loss of root, so not so bad. I use a RcJoyCon to HW keyboard for my SWC I am still experimenting with other apps.
Does loss of root mean a locked bootloader?
I also had no male to male USB, just made my own. Just twisting the wires together worked fine.
Please share if you learn of any ways to retain root.

Will monitor this thread, as Im looking for root for JY-UM135P2 too. Will try the usb method soon.
EDIT: tried to make custom male to male usb. Connected the 5 wires. Laptop and hu doesnt recognise the cable.

steef84 said:
Will monitor this thread, as Im looking for root for JY-UM135P2 too. Will try the usb method soon.
EDIT: tried to make custom male to male usb. Connected the 5 wires. Laptop and hu doesnt recognise the cable.
Click to expand...
Click to collapse
My usb mod only involved 4 wires. Not sure whats going on with the extra wire, that may be the issue. Double check your connections.
Was able to re-root today using my X98 tablet, Good news for the future, when needed after car install. Its rare that you would need to reboot anyways, after all the software mods have been done . Deep sleep retains root, and the device is only drawing 0.01Amps(limit of measure)
I'll have more to share for these non MTCD/E, PX5 units in the future. Have found a way to keep user apps in memory, after deep sleep by using xposed modules. Tasker now stays active.

Oke today tried again. Bought male to male usb. Still the cable js not recognised in both usb ports. Enabled usb debugging and tried lower and upper option in the chinese menu from developer options. So no clue for now

Experimental and untested
As some of you might know I created a windows and linux script to install seSuperuser onto the Joying Sofia3GR Intel units.
I just compiled su and the Superuser.apk for the PX5 models. I do not have a PX5 and therefore this is completely untested!
Prerequisites:
- You need to have adb over tcpip working.
- (Linux) You need to have adb installed (but you have otherwise the line above would not be possible)
- Have a Joying PX5 ROM available so you can reflash if necessary.
On your pc:
Download the attached Superuser-JoyingPX5-Arm.zip onto your pc/laptop.
Unzip it somewhere on your pc/laptop.
On Windows: Run CMD.exe as Administrator.
On Linux like OSes: Open a terminal.
Change to the folder where you unzipped the files and change to the folder where the install.sh and install.bat are located.
On Windows: Run the install.bat script with the IP address of your Head Unit as a parameter: install.bat 192.168.178.50 (for example)
On linux: Run the install.sh script with the IP address of your Head Unit as a parameter: ./install.sh 192.168.178.50 (for example)
Wait until the script finishes.
Reboot your Head Unit.

gtxaspec said:
That's an fyt SoM... Solutions soon? Standby
Click to expand...
Click to collapse
Hi gtxaspec,
Are you planning to make an custom rom for these Rockchip PX5, FYT 6026 bases headunits?
I have your GTX joying ROM V9a3an on a Joying FYT6021 intel SoFIA and it works so much better than the stock rom.
Keep up the good work!

surfer63 said:
Try this
Click to expand...
Click to collapse
i finally got my device connected and also got the unauthorized message:
"This adbd's $ADB_VENDOR_KEYS is not set; try 'adb kill-server' if that seems wrong.
Otherwise check for a confirmation dialog on your device."
I tried everything i could find on the net and in your link but still had no luck...
Does anybody have an idea what else I could try?
The thing with my device is - in order to be able to connect to it with adb I had to change something in the developer options menu: in the top right corner there are 3 dots (even above the On/off switch) and there you can only choose "USB computer connection" - if you click on that a popup menu appears "USB MODE" and 2 chinese options to choose from. It was set on the first option but only works if set on the second option (it's chinese so i can not read it)

Chinese AC8227L mtk - USB issue

Hi all,
I brick unit 2 days ago after bad flash with Mekede Root.img via SDCard and now unit start with black screen, I only hear the cd running 2 sec and nothing else.
Problem on this unit, I never had USB connexion with my pc or my Samsung device (on each 2 slots) when android was alive, so now it's bricked, I opened unit and I'm searching everywhere.
When I plugged USB on pc without 12v, I hear CD inside. When I start with 12V + acc, it's the same, but nothing and black screen.
I installed all drivers MTK from the web lol nothing. I tried to solder a USB cable on USB that goes to the CD in parallel (because I hear something so it's working) but no success. I have 2 pc, 2 different cable so it's not related, I tried all combinations with button / reset (10 sec, 30sec etc).
I tried this from Jacotreus here : https://forum.xda-developers.com/an...its/how-to-enter-recovery-mode-t3280247/page2 no success too, but that was obvious because no recovery ..
BTW when I plugged sdcard with .img / .upd / .bin, nothing works
Where could I watch to activate this damn USB ? is it really impossible to do something ?
If someone can help, thank you :good:
ps : I bought this unit in second hand, so I can't contact seller. it will end up in a closet so I can hack it

Hi, did you manage to connect to the head unit, I have the same problem, cannot get it to connect to the pc tried test point method still doesn't connect!

Hi no I didn't. I bought a new unit PX30 rockchip witch is not seen either by my pc... but it's working so I don't touch anymore.
My AC8227is still bricked, hope to find how to solve one day

Hi, I know how to get the unit to connect to PC but have no correct rom to flash. Do one of you guys have the rom for this unit?

hello, you can explain to me how you did it

Hello friends!
I bought an Android Head Unit MIB4 (SC9853I) for my VW Golf 7:
https://www.alibaba.com/product-det...l?spm=a2700.7724838.2017115.25.71201862OEMWlE
Everything works fine but I'm having problems with the USB ports.. the 3 usb ports charge my phone but they don't read any usb drive with music. I don't know if this is a hardware or software problem.. I've tried formatting several usb drives (4gb , 1gb, 64gb) in fat32 but none of them are read by any usb port of the headunit.
Please, help me! and thanks in advance..

Junsun V1/Pro Megathread

This thread is consolidating all the information of Junsun V1 and V1Pro devices scattered in the Android Head-Units forum. I want to write and extend this to make it easier for new people. It's sometimes difficult to find the right information.
Warning: Some of these commands are altering the system. If something goes wrong you can brick your device. Be sure you know what you're doing. I'm not responsible for any damages!
General Other Threads​Junsun V1​Junsun V1 Pro​Junsun V1 Pro Firmware (8259)​Junsun V1 Pro Firmware (8227L)​Junsun V1 (8667Q)​Firmware​Updating the device firmware​Junsun V1 Pro firmware files​Root​ADB connection​Root with Magisk​Writable System​

Updating Firmware​Preparation​
USB drive formatted as FAT32
Files for update (*.bin, *.upd) need to be in the root directory of the USB drive
Starting the Update​The update should start automatically when the USB drive is plugged in. A pop-up appears that says that an update will start. After a few seconds the device will reboot and install the update.
If this doesn't work, plug in the USB stick and restart the device with a needle in the reset button. When the device starts up move one finger on the touchscreen around and wait for a green detected message at the top of the screen. The update will start.
Problem solving​I don't have a *.upd file
That is OK, the file does mot contain any information. Just create a new empty file and rename it like the *.bin file. As example, if you have a 8259.bin create a 8259.upd file.
The device doesn't recognize my USB thumb drive
There are 2 USB connectors on the back of the device. If one does not work, try the other. Make sure your thumb drive is formatted as FAT32.
Firmware Files​This list is made by taking links from different firmware threads (found in first post). Every entry has a link to the original posts. Please be careful when flashing, the files need to match the correct CPU and screen resolution. If you have files for the normal V1 or different screen resolutions you can send me a PM.
Junsun V1 Pro | 8259 | 1280 x 720:​
DownloadOriginal PostVerified8259P_军灿UI02v1280x720-国外_v20_20210907.ziphere8259P_军灿UI02v1280x720-国外_v27_20211201.ziphere8259P_军灿UI02v1280x720-国外_v31_20220225.ziphere8259P_军灿UI02v1280x720-国外11_v1_20220323.ziphere8259P_军灿UI02v1280x720-国外11_v3_20220422.ziphere8259P_军灿UI02v1280x720-国外_v44_20220920.ziphere8259P_军灿UI02v1280x720-国外_v50_20221226.zipheremopfi
Junsun V1 Pro | 8227L:​
DownloadOriginal PostVerified8227L_8军灿UI03-国外10_v7_20210814.ziphere8227L_8军灿UI03-国外10_v21_20211130.ziphere8227L_8军灿UI03-国外11_v3_20220714.ziphere
Junsun V1 | 8667Q | 720 x 1280:​
DownloadOriginal PostVerified8667Q军灿UI02-国外-VHD720x1280_v11_20211207.ziphere8667Q军灿UI02-国外-VHD720x1280_v12_20220214.ziphere8667Q军灿UI02-国外-VHD720x1280_v13_20220510.ziphere8667Q军灿UI02-国外-VHD720x1280_v23_20220801.ziphere
Factory Reset​Settings -> Car Infotainment -> About Device -> Settings Icon -> Code 8878 -> Erase all Content

ADB Connection​Preparation​
Activate Developer options. You have to click a few times on the build number until you are a developer: Settings -> System -> About Car -> Build number
Activate USB debugging. Settings -> System -> Developer options -> USB debugging
Use the 4-pin USB connection on the back of the device. Connect with a USB A <-> USB A cable. My device had a female Mini USB adapter for using a Mini USB cable.
Connect​Use adb to connect to the device
Bash:
adb shell
Problem solving​ADB can't find any devices
It could be that the ADB connection with the device is not working. This means that the corresponding option is not set. This can be done temporary or permanent.
Temporary Connection
To make the connection with adb work temporary we can change the USB setting of the device. To do that we need to set Settings -> USB Preferences -> USB controlled by -> This device. No it should be possible to connect via ADB. The connection is temporary, because after a reboot it is gone and has to be set again.​
Permanent Connection
We can enable the connection permanently by changing a value in the secret menu. Go to Settings -> About Device -> Cogwheel (top right) -> Code 8878 -> Others -> USB2 Debug -> Enable​
Can't find USB Preferences
Go to Settings and click the search icon in top right corner. Type in usb and then click USB controlled by.

Root​Create boot.img​Connect via adb to the device and find the location of the boot partition. The star '*' has to be replaced according to your device. For my Junsun V1Pro it is bootdevice. In the next step we will create a copy of the boot partition. Please be careful with dd command. It will overwrite wrong files or partitions if you do a mistake.
Bash:
adb shell
su @#zxcvbnmasdfghjklqwertyuiop1234567890,.
ls -l /dev/block/platform/*/by-name/
dd if=/dev/block/platform/*/by-name/boot of=/sdcard/boot.img
Patch boot.img​Install Magisk apk on your device. I used Magisk v23.0 from here: https://github.com/topjohnwu/Magisk
Open the app and click on top right Install button
Then click next and choose Select and Patch File
Select your boot.img and let Magisk patch it.
Copy the new created file to your computer. The filename will be similar to magisk_patched_23000_***_boot.img
Bash:
adb pull /sdcard/magisk_patched_boot.img <older_on_your_computer>
Flash magisk_patched_boot.img​
Bash:
adb reboot bootloader
fastboot flash boot magisk_patched_boot.img
fastboot reboot
Writable System​To make the system writable we need to remount the partitions.
Bash:
adb shell
su @#zxcvbnmasdfghjklqwertyuiop1234567890,.
remount
Now we need to reconnect and then we can write to the system (i.e. copy a file)
Bash:
adb shell
cp /sdcard/myapp.apk /system/app

Reserved

Reserved

Hey all, I need help with my junsun v1 pro 4gb +64gb-mtk8259- I just had it installed and everything works except Bluetooth. I can make calls from unit and or my cell phone. Apparently the people I call can hear me but I can't hear them. On occasion as it dialing I hear the ringing for a second then it cuts out. Is this a hardware issue, install issue, or something I need to change in secret menu?? I've reached out to junsun with no luck. I fixed the issue with the swc thanks to this forum!! Hoping someone can help me. Car is chrysler 300c and phone is samsung galaxy note 20.

Cubanlink81 said:
Hey all, I need help with my junsun v1 pro 4gb +64gb-mtk8259- I just had it installed and everything works except Bluetooth. I can make calls from unit and or my cell phone. Apparently the people I call can hear me but I can't hear them. On occasion as it dialing I hear the ringing for a second then it cuts out. Is this a hardware issue, install issue, or something I need to change in secret menu?? I've reached out to junsun with no luck. I fixed the issue with the swc thanks to this forum!! Hoping someone can help me. Car is chrysler 300c and phone is samsung galaxy note 20.
Click to expand...
Click to collapse
Hi, I have the same problem, if you have found a solution to the problem please share it with me! Thanks!

I am trying to mess with the secret menu. Like bt sync type, volume, three is various options in there related to Bluetooth just don't want to screw it up worse. Hopefully someone can shed some light cuz if not I'm returning it. I'll have to pay to take it out....ughh...I love the look though, if not I would just get pioneer but it don't look stock like this

So I Brought it back to my installer and he fixed it. Apparently in my car the speaker inputs were reversed, that why I couldn't hear anyone through speakers. He told me some cars with 6 plus speakers have this problem when installing these type of units. Loving the unit now that's its all fixed.

Hello
I have Junsun V1 pro 4/64g and my unit is hanging on Google boot logo (Android 9).
Does some one know how to get to recovery to do wipe cash / do factory reset?
Thanks

I have the junsun v1 1gb, it does not enter the google play services.
I would like you to provide me with a ROOM image to update or factory reset.
Thanks!

bartekm01 said:
Does some one know how to get to recovery to do wipe cash / do factory reset?
Click to expand...
Click to collapse
I'm actually also looking for a way how to boot into the recovery. Haven't found one at the moment.
For your problem you could try and flash an update (or same version again). Description is in this thread.

Hi
Unfortunately updates are also not booting / updating while reseting. Plugging USB pendrive with update files to second USB port and against resting button still can't manage to update - radio is botting "normally" and ends up with bootloop

Try both USB ports.
Plug the drive in turn the device on and then move a finger on the touchscreen. I do a left right movement. If that doesn't work you will need to do it with the mtk tools and a scatter file.

Hi!! Are there any way to disable calls from SIM card ? Thanks

Hi, I purchased the Junsun V1 pro 6gb/128gb and am pretty happy with it. All the important things connected and worked straight away which was grand. One thing I wanted to check is the battery draining problem and the cutting of the 2 wires to prevent this. I found the Junsun diagram and on there it seems it's the red and orange wires (that "look" to run from the main black block to the black power block for the head unit). The query I have is those wires on my loom run from the canbus white block to the black power block in the head unit. Pictures attached to hopefully show this a bit better. Excuse the terminology Has anyone had any experience with this at all? TIA

Hi Everyone,
Can someone please help me how to factory reset code or the new firmware my Junsun v1 pro 9 inch 8G + 128 GB Radio chip MS98. i tried 8888 or 8878 but i can see no factory reset only factory setting.
thank you advance.

Hey does anyone know how to completey reset the AutoLink app? I tried disabling and enabling again but. Nothing works. I just want to get ride of Android auto activated from AutoLink.

Sowmaxwel said:
Hi Everyone,
Can someone please help me how to factory reset code or the new firmware my Junsun v1 pro 9 inch 8G + 128 GB Radio chip MS98. i tried 8888 or 8878 but i can see no factory reset only factory setting. View attachment 5572199
thank you advance.
Click to expand...
Click to collapse
I have the 6gb, not sure what chip. When you go into the menu after code 8878 it should say on the right in the middle "Erase All" I think. Then it asks you if you want to factory reset.

Junsun V1 2gb/32gb won't boot update

Hi all,
Trying to update my Junsun headunit with 8227L_8军灿UI03-国外11_v3_20220714 however when plugging the USB into the unit, it won't boot/recognise the .bin & .upd files.
I've tried both USB ports, both ports read the USB, and I can access the files on the headunit through file explorer, however whatever I try I can't get the unit to boot the update.
I've attempted to reset the device using a pin in the reset hole, and also tried with the unit off and turn the key but the unit just boots normally - nothing seems to be working. USB debugging is turned on in developer options.
Any suggestions?
Platform: 8227L_demo
RAM: 2gb
Storage: 32gb
4 core

Did I read somewhere that you need to rename the files to remove the Chinese characters before they will be recognized? I could be wrong but worth a try.

SP7731E TS7.4.5-100 HU Root or how access USB debugging with PC?

Hello, I have chinese radio with these spec:
CPU: Quad-SL8141E
Android: 10
Hardware info: sc7731e_1h10_v1.1.0 (sometimes it says SC7731e... and in other places it states SP7731e..., not sure what I have )
MCU: Ts7.4.5-100-13-A2A39D-220104 (whatever that is)
I'm looking for a way to root it OR access radio through USB debugging. I need to resize my screen as screen nearby borders is very insensitive (I found this ADB overscan command).
I couldn't find any root for this device, or maybe I can't search, maybe you know something?
Other thing is that I don't have option to turn debugging over Wi-Fi, there's only USB debugging option in developer settings (engineer mode or something like that also doesn't include that option). So I bought USB cable with type A male on both plugs, but I guess that won't work because I can't see this device on my laptop. Like the head unit is in host mode or something, not device mode? Maybe that I can change to "device" so it acts like smartphone when connected to PC? Terminal emulator doesn't work, root required to enter adb commands.
I'm completely exhausted with this screen and unit, many options missing, although it's working fine.
Or maybe there is a way to extract rom image from this head unit, copy to pc, edit it on PC so it has root and then update head unit with "fixed" rom?