yashsingh1/xdaforums huggingface dataset:
[Android Head-Units] iscle:
You can try those two points with a very thin and long cable (or with a 1k resistor if you have one, to avoid shorting something if it's not the correct ones)
[Android Head-Units] arcadilius:
That's a good call, but I've already tried that. I've spent long hours now trying to revive it - I think it's time to let it go. I may not be aware but at this point the board may be broken completely. I truly appreciate your input mate. Thanks a lot and keep a good work!
[Android Head-Units] iscle:
MediaTek hardware is quite hard to brick, even if secure boot is enabled (not the case) so I think your device can definetly be revived. However, it's tricky to know the pin out. I'm almost 100% sure that the pin we're looking for is exposed on that module, on the pins that get soldered to the main board, it's just a matter of finding it.

What I would do is: find a GND on the board, solder a small cable with a 500ohm or 1k resistor in series, and start trying every pad on the CPU module and see if any of it triggers the USB recovery bootloader.

Once you find it, be sure to document it for the community, and post pictures of your device working again :)

For the recovery firmware, asumming you have a Junsun V1 or any other FF-5500 device, use this firmware: https://drive.google.com/file/d/1Cz0DgZFq9onp7goZjHmXLOqusLVg_6B6/view?usp=sharing

EDIT: Remember to power the unit up only after shorting the pin! Also, remove the big electrolytic capacitors from the board to avoid having to wait 4-5 seconds between tries (they take a while to discharge).
[Android Head-Units] maxou2:
I rather suggest try these contact points using the iscle's suggested method
[Android Head-Units] iscle:
That's the DSP, as far as I know they are just some UART pins and maybe I2S or reset lines...
[Android Head-Units] iscle:
I have found the UART TX pin for the forfan module! It was a bit tricky, but it works! And it's set at 921600 baud as it's typical for MediaTek CPUs.

The pin where the green wire is attached is the TX pin for the default UART used by the preloader and lk!
[Android Head-Units] arcadilius:
Great work, this is fantastic! However this procedure will require a bit of study on my part as my experience with UART and MediaTek is very limited. At least I have a starting point, and few articles/posts to dig through. I'll get to it as soon as I can. Thanks you so much for your help.
[Android Head-Units] arcadilius:
I have some progress... first of all I've found out that my Macbook Pro had issues with USB connection while running Windows in virtual machine, this happened after an update and went unnoticed for a while. Second of all - you were absolutely right about location of the test point on this board. After few attempts I've managed to write preloader and rest is a history. The outcome: I have system running on device but... touch recognition is way off, I can pull down top bar, I can't select on-screen apps or settings but I can change wallpaper because it does not care where you hold your finger, sound does not kick in and backlight is off. As on-screen navigation is broken and behavior exactly the same on two tested firmwares, I don't know how possibly I could recover from that :) Anyway - you are the man!
[Android Head-Units] iscle:
Hmm the touchscreen settings can be set on the secret menu (8888), as well as bluetooth, radio, etc. Just connect a USB mouse to use it properly :)
[Android Head-Units] arcadilius:
Yes, that's correct. "Secret menu" solves some of problems but not all of them. Backlight is not working at all (and I'm assuming this should work out of the box). Screen is oriented correctly but touch surface is "negative" horizontally, x axis is flipped (on original firmware this should be sorted out of the box as well). Side on-screen buttons apart from reset, which is the only physical button, don't work. I may have damaged the board while I was trying to figure out where that bloody test point is. Moreover there are stability and bluetooth issues I've encountered earlier which encouraged me to put my fingers on it in first place. That was a total flop from the beginning... I'm truly grateful iscle, for you time and advice, when many just turned their heads away. I wouldn't get this far without your guidance. There's nothing left to do but to call it: X5D v 1.1 - time of death Fri 26 17:06.
[Android Head-Units] iscle:
Would you mind sharing which pin was the one that let you flash the device? I'm working on a new preloader and I'm sure it won't work first try :P
[Android Head-Units] arcadilius:
Sure... I believe I've used ADVANCED MODE and WRITE MEMORY tab in SPL for initial preloader write at address 0x0. From there, the device was detectable under the DOWNLOAD tab as well. In case when preloader on the device is correct, DOWNLOAD mode alone should be efficient.
[Android Head-Units] iscle:
Oh, I was hoping it was one of the ones in the outside... Removing the shield is a pain...

Well, thanks for the information! I'll try my best not to brick it haha
[Android Head-Units] Inga29:
Junsun V1 Pro 4G +64G please help me how to root and install Magisk or SuperSu
[Android Head-Units] eecon:
Please how do you boot into recovery after flashing?
[Android Head-Units] Lori.Dr:
Hi all can anyone help me i can't flash the tprw recovery gives me this error. Who can give me advice
[Android Head-Units] TorstenH:
Don't have entry forfan.force_fullscreen in build.prop. Adding the entry has no effect. All other forfan entries starts with ro.forfan...

Any ideas how to show the status bar?
[Android Head-Units] RadianTOR:
Hello all!

Today i update my device Junsun V1 2x32 DSP with new firmware. All works fine, but in memory settings always used only 1GB RAM. Its look like 1GB of memory is never used.

Anybody see the same, or its problem only with my device?
[Android Head-Units] mopfi:
@iscle How did you build twrp for your device? I tried building one for my V1 Pro but it ist not correctly working.
[Android Head-Units] iscle:
I created it from source with the omnirom twrp code
[Android Head-Units] mopfi:
I will try that again. I used this manifest for building it from source. https://github.com/minimal-manifest-twrp/platform_manifest_twrp_omni

The building itself worked, but after flashing the system is not booting anymore.

Is it possible to get into fastboot when starting the device? I don't want to flash the whole image everytime the recovery is not working and fastboot boot recovery.img doesn't work because it's not a A/B device.
[Android Head-Units] mopfi:
@iscle

So I got TWRP running on my V1 Pro. I used Android Image Kitchen and your image. Still not sure why it is not running when I build from source. One thing that happens is when my device boots up the display gets completely white before TWRP splash is displayed. I thought the device crashed, but it seems fine once inside TWRP. Oh and I can't regulate the screen brightness.

Will play around more with it.
[Android Head-Units] Kshaku:
If anyone needs, i got newest firmware to 8227L V1 2G/32GB version

8227L_8军灿UI03-国外10_v21_20211130.zip

drive.google.com
[Android Head-Units] RadianTOR:
You try it? Whats new?
[Android Head-Units] Kshaku:
It fells faster, uses 800mb of RAM (my unit before uses 1GB and more on start), native support android auto, but you must buy license, and you can uses 4G USB modems who's working like ethernet usb card (my huawaei E3372, works very well), maybe standard modems work too, but i dont have one to test, on the moment nothing find more. And of course, got new UI3 if you have very old rom.
[Android Head-Units] RadianTOR:
Can you please show ui03 interface photo?
[Android Head-Units] Kshaku:
Actual my car be on mechanic, so i take picture from new auction. In my opinion, looks better than old interface, when take back i take photos what looks, with every menus. I forget to tell, new rom dont have igo maps, only google maps app.
[Android Head-Units] RadianTOR:
Thank you very much!
[Android Head-Units] Kshaku:
Here you go
[Android Head-Units] RadianTOR:
Thank you!

It's looking nice. I try install it :)
[Android Head-Units] RadianTOR:
Yesterday i update my device with new UI03 firmware. It's look verry nice and work ok.

But today i back to my previous firmware. Im minimalist and new UI03 is very colorfull for me :) I use minimalistic Holo launcher.

Photos from new UI03
[Android Head-Units] RadianTOR:
Anybody can give me SU files from /system/bin/ and /system/xbin/

I wrongly replaced my original files without backup :(
[Android Head-Units] panozzz70:
Hello everyone, and thank you for the wonderful and useful contributions you make. I recently installed the firmware with Android 10 on my device, I noticed that among the apps there is Android auto, but it cannot be used because it asks to be activated, someone has solved the problem? Thank you?
[Android Head-Units] TorstenH:
Ask your seller. It is possible to buy an activation code (e.g. on Aliexpress).
[Android Head-Units] RadianTOR:
Anybody know were is DSP apk store his settings ?

My problem: any time DSP settings reset to default after reboot. I want make backup this settings.
[Android Head-Units] Sezgin 2:
Is there Android 10 version suitable for this 2GB/16GB device?
[Android Head-Units] sandr2010:
For devices on the AC8227L processor, there was no android version 9, 10 - there is only android 6.0 and 8.1, regardless of what the developer wrote in the information. Above is the link to the firmware, in which it will be written - android 10.
[Android Head-Units] Sezgin 2:
This is not true. I installed the software in the link below in 2019. Android version 9. No problem. I just wanted to update if there is Android 10 version. Otherwise my current Android version is 9.

https://xdaforums.com/t/help-with-this-chinese-hu-alps-8227l_demo.3930394/#post-79645941
[Android Head-Units] sandr2010:
Ask Google a question: what version of android corresponds to kernel version 3.18.79. Next: you can try to install an application designed for android 9+: it simply won't install for you. Chinese programmers know how to make a fake into the system. You can also check the API / SDK version in build.prop (/system/build.prop) - it will be version 27, which means - android 8.1
[Android Head-Units] Sezgin 2:
I understand. Thanks for information. So, is there an up-to-date operating system for the device I'm using?
[Android Head-Units] sandr2010:
Your firmware version is from 2019.10.22. In the first message on this page - firmware from 2021.11.30.
[Android Head-Units] Sezgin 2:
https://xdaforums.com/t/junsun-v1-t...oid-8-1-2gb-32gb.4192003/page-4#post-86384957

The file I am using now is " 8227L_8-UI04-9.0_v18_20191022 " The only difference from this file is UI03.

Is this a problem?
[Android Head-Units] sandr2010:
UI1/2/3/4/.... is the kind of launcher. Your UI4 launcher will change to UI3 (the photo of the launcher is above on the page).
[Android Head-Units] Sezgin 2:
I understand. So if I install the software, there is no problem with the device.

This is the home screen of my device.

.
[Android Head-Units] RadianTOR:
Hi all !

I have a trouble with entering to twrp recovery.

When i reboot my device from terminal "system/bin/reboot recovery", always ok and i enter to twrp. But if i reboot device with reset button and try to intere in twrp with 5 finger method, it enter to twrp for 3 seconds and boot system :(

Why?
[Android Head-Units] iscle:
I have no idea, I didn't even know there was a way to enter recovery that way... I always used "adb reboot recovery"
[Android Head-Units] RadianTOR:
What if device in bootloop? Adb command work in that situation?

Last week I catch bootloop, and could't restore system from backup :( . Device restored only with full reflash.
[Android Head-Units] RoGueMS:
I have a Junsun V1 2Gb 32Gb Wifi 4G it came with Android "9.0" that is really 8.1, can someone tell me if it's updatable or so? I cannot connect my phone to the car since Android 10 came out nothing works. I'm going crazy with this I only see updates on v1 pro firmware
[Android Head-Units] RadianTOR:
Try this firmware

Post in thread 'Junsun V1 - TWRP, Root, Discussion and more. (AC8227L) (Android 8.1) (2GB + 32GB)' https://xdaforums.com/t/junsun-v1-t...7l-android-8-1-2gb-32gb.4192003/post-86384957

I test it, and it work on Junsun v1 2x32 dsp.

Oh, sorry, above firmware for junsun withot 4G.

About bluetooth... try connect other phone, maybe problem in the phone, because i have't problem with old firmware too.
[Android Head-Units] RoGueMS:
My unit is a:

Junsun Android 8.1 Intel Airmont eight-core 1.8GHz SC9853i (2GB RAM, 32GB flash)​

According to Junsun there is not firmware to update and its not possible to use Android Auto on that unit..

It came with a app called Easy Connect but it never recognizes any of my phones connected with USB. Any app recommendations?
[Android Head-Units] marcusseco78:
Hi folks ... I don't make the SPflash tools recognize my head unit (purchased by name TwinCan on Brazil). I try to stabilish connection with the head unit power off, power on and during reset. The cable is good quality. MK driver is installed.

The only way that I find to update the machine is use "update_ty.zip" on update section of android settings...

I want to change the firmware to Junsun firmware that is more smoothly and with have a Android auto native support... The actual is to slow on Google maps, Waze, Spotify and YouTube....

Anyone can help me?

Thanks
[Android Head-Units] Aramuni_:
for those who are having a Fail problem, I changed the pen drive and it worked
[Android Head-Units] strade:
Hi to all.

I updated my head unit with 8227L_8军灿UI03-国外10_v21_20211130 , and all went well except the UI interface is covering only part of my screen. My resolution is 1280x720.

Can anyone help?
[Android Head-Units] Stefce19:
Can I use it on 2gb / 16 gb?
[Android Head-Units] Grekivan:
Guys hello, help identify components
[Android Head-Units] Grekivan:
decided everything
[Android Head-Units] wybitny2:
I have a question whether TWRP will go to Junsun v1 pro mediatek 8667 ?.
[Android Head-Units] Emilson:
I found a couple new launchers from xyauto for our headunits.

so here's link to my original post:

New launchers, mainly include a mini-map in the main menu etc etc.

I see that there are people who are advanced in modifications, maybe you could help to improve them a bit, because they need to be a little adapted to our systems.
[Android Head-Units] CLEUVER:
MEU CONTATO PARA WHATSAPP +351963771991
[Android Head-Units] MiSSigNNo:
Does TWRP still work in A10 Junsun V1 units?
[Android Head-Units] Pacjonek:
Hi iscle,

You probably know what is the easiest way to read the data that the Canbus decoder sends so that I can read this data in the app I'm developing? I am interested in everything, ready methods, intents, raw data
[Android Head-Units] iscle:
Hi! I did not end up looking into it. This is all I have found: https://github.com/Iscle/MainUI

I can't remember but I'm sure that the CanBus communication was also taken care of in the native library, which you can decompile with ghidra, and it is most likely just reading a /dev/tty device. I'm not sure there is any easy way to hook into the data without replacing MainUI directly.
[Android Head-Units] Wotaisalive:
Guys, Ive got a realy simple question and i hope one of you will be able to give satisfying answer, Junsun V1 2/32 , Android 11, my HU stucked in a boot loop and i try to fix by recovery but have no f****ing clue how to get recovery mode. Ive tried hunderds of variation of RST+IGNITION+HEADLIGHT+TOUCHSCREEN combo but no succes. You will be my guest for a bunch of beer just please give a solution. Additional information: I installed CarLauncher from Google Play and of course i gave it all the required permission. After that the application has sent a notification that it can not connect to goole play services. I removed the application right after the system has totaly frozen, restart and boot looping and iam here.
[Android Head-Units] Emilson:
If you can connect your laptop there you can try to use 'minimal adb' by typing command 'adb reboot recovery' just after ignition, when unit is trying to boot. ( btw. laptop must have a usb adb drivers installed)

I read that you can press the reset twice to boot junsun in recovery mode, which I dont have this model and it didnt work for me.

So the first option is the easiest for me, that im using the most.
[Android Head-Units] Wotaisalive:
Thanks, sounds good. Do you think that it could work also by connecting an adroid device to the HU via USB and using ADB Shell - Debug ToolBox ??? In theory it supports android 11 and also works in remote mode with usb connection not only in local.
[Android Head-Units] Emilson:
doubtful but if you actually have such an app, everything is possible.

I used adb via android phone but only thru 'wifi adb' on a unit with working operating system

Good luck with whole recovering thing (but i propose you to start searching for a package with firmware to be flashed again)
[Android Head-Units] iscle:
I don't think you can boot to recovery in this units, you'll need to flash it with SP Flash Tools using a USB-A to USB-A cable on the 4 pin connector USB port
[Android Head-Units] Wotaisalive:
Guys, I got this message from support center, Do you think that these files as a firmware are valid ?

Message:

Dear customer Thank you for your contact, you mean the car radio stuck at booting logo? We attach great importance to your problems. We can provide you a resolution: Please reset the radio by pressing the "reset" button with something like a needle or toothpick, when the radio is turned on. https://ae01.alicdn.com/kf/Hbd7a0724144a4d17b8ab283ac54009cb6.png This is the firmware of this car radio https://drive.google.com/drive/folders/1QGzYyTV2_S7W2wmr7mP3uSgsWAxzyONb?usp=sharing Method: Stab the reset button in the car to force the upgrade Step 1: Please download and Unzip the files, and then copy the files inside to the root directory of the USB stick or SD card. to the root directory of U disk or SD card, U disk or SD card inserted in the machine 4PIN interface Step 2: Turn on the machine, stab the machine's reset button to reset the machine Step 3: When the machine screen just shows the car logo, immediately shut down the machine (i.e., unplug the key or off) Step 4: After turning off the machine (i.e., pull out the key or turn off the engine), wait 5 to 10 seconds, then turn the machine back on. At this point the machine will automatically detect the upgrade into the upgrade interface, the machine automatically restarted after the upgrade. If it does not work, we will replace a new car radio for you or refund Looking forward to your reply Wish you a happy day Ivern
[Android Head-Units] Janusz_63:
Dzień dobry, jestem tu nowy z Polski i mam pytanie czy jest możliwość zmiany oprogramowania w mojej maszynie która ma takie parametry. Chciałby mieć taki interfejs jak koledzy wyżej V1 pro
[Android Head-Units] Emilson:
DOWNLOAD LINK: --->> Launcher ui18 1024x600
[Android Head-Units] Janusz_63:
Witam potrzebuje taki interfejs czy moge to zrobic u siebie i jak pozdrawiam
[Android Head-Units] Emilson:
Pobierz z linku launcher ui18.apk zainstsluj i sprawdź, masz inny procesor ale może zadziała
[Android Head-Units] Janusz_63:
Dzięki za pomoc, czy możesz podać link do pobrania?
[Android Head-Units] Wotaisalive:
Problem solved!

V1 (NOT PRO) 2GB+32GB WIFI - CPU MT8227L

Problem description:

Installation of a 3rd party launcher app (CarLauncher) has overwritten/updated a couple of system files.

Result :

Google play services stoped to work/disappeared and for the next restart the device stucked in boot loop in addition it has drained the battery of my car until morning. I guess the HU cant totally switch off with this error and behaving like a hibernated system.

Solution:

Right now there isnt any known method for this version of the HU to restart in recovery mode to make a wipe cache but . . . .

There is a working method to force the HU into update mode.

-Get a paperclip or needle

-Get an USB flash drive 1-32 Gb, Format it with FAT32 file system with the default volume size as it is provided by WIN11

- Open the link (provided by JUNSUN support)

https://drive.google.com/drive/folders/1QGzYyTV2_S7W2wmr7mP3uSgsWAxzyONb?usp=sharing

-Extract the ZIP file and copy all 3 files to the flash drive root directory.

- Get in the car and connect the flash drive to the 4 PIN USB outlet.

-Put the key into the start lock and turn to ACC/Power on wait until the boot logo comes up.

-Take the paper clip and press the reset button 1x, just press, dont hold

-The device will restart and when the boot logo appears again switch the power off/ turn the key/ ignition off immediately.

-Wait 10 SEC and turn to ACC/Power on.

-If everithing went well a "green loading bar" shuld appear on the screen with the tex "UPDATING" or something similar, i could not read it properly because it was visible only for a couple of second due to the size of the upgrade files ~2kb . I think these files are something that is like ADB (Android Debug Bridge) and initiates an update recovery command.

-The update took me approx. 5 mins.

-After the update all 3rd party application will disappear, eventually its like a wipe chace.

So far this is the only known working methode to get out from boot loop without flashing the HU.

Ps.: If it does not work try the other USB outlet or try another flash drive. If it still does not work dicsonnect every cable from the HU and reconnect only the power supply and USB and try again all the combinations that i previously mentioned.

I hope that it was helpfull for those who had or has the same problem.
[Android Head-Units] CLEUVER:
onde vai a outra ponta do cabo verde? nao sei como reviver?

Mod translation: where does the other end of the green cable go? I don't know how to revive?
[Android Head-Units] madmax700:
Hi Guys,

When i tried to install new firmware, I lost carbit easy connection app and the z link app. Somebody please suggest me to install those back again. I am trying to connect AA wirelessly. Any suggestions please??
[Android Head-Units] air32:
Hey could anyone help me with the update from november 21 for the 8227L devices, i put the .bin and .upd file on a usb stick but update didnt start (device does not recognize the update file)

Device Informations:

Manufacturer: alps

Model: D02022HA16

Device: 8227L_demo

2GB+32GB

Thx,

air32
[Android Head-Units] Emilson:
Probably your radio doesnt support that type of update.

You can try upload firmware with this method XY-AUTO-INSTALL-ROM-WITHOUT-PC, or thru pc with SpFlashTool.

Anyway u should take a look inside the Head unit to find exact model, it should be written on the motherboard.

Sometimes the model visible in system isn't accurate in those Chinese Head units. Most infos like android 11, 2gb Ram memory, 32gb storage usually are fake.

I've seen in other thread that someone identified D02022HA16 as YT9216CJ, not sure if its reliable.
[Android Head-Units] rndmmeme:
Hi guys!

I recently bought a junsun v1 (not pro) 1G/16G head unit.

I tried connecting it to my pc as it is running Android 8.1 Oreo and I wanted to try flashing a custom rom from ExtremeMod. Howevery Pc is not recognizing the head unit. All steps for preparing flashing were taken like stated in SUPERMOD thread. Any ideas? Also how can I factory reset, there is no option to be found...
[Android Head-Units] Emilson:
Lucky you that your pc couldnt recognize your head unit because you would already seriously brick your HU. As i see, you have completely different specifications, a different cpu, etc.

Factory settings option you can find in 'more' tab in your system settings.

Get know more about your radio before you start taking such risky steps.

Just Google junsun ts7
[Android Head-Units] rndmmeme:
thank you for your response :) I already spent about 4 hours last night on google and didn't find anything useful. Maybe I looked for the wrong information... So I can't mod my HU, eh? bummer