yashsingh1/xdaforums huggingface dataset:
[MTCB Android Head Units Q&A] gmcmen:
One is the analog steering wheel control (2 key wires), the other is digital steering wheel control (1 key wire), they are not compatible with each other.
[MTCB Android Head Units Q&A] Cmoney1984:
I'm having the same issue which ground did you use to connect the steering wheel controls
[MTCB Android Head Units Q&A] gmcmen:
I think it was pin 17, see post #187 https://xdaforums.com/showpost.php?p=71487620&postcount=187
[MTCB Android Head Units Q&A] skav83:
Hello,

I updated the car radio in 5.1 all worked well for 15 days and in recent days the wifi does not want to activate and my USB ports no longer detects anything. I can not redo an OS installation.

Do you have any solutions ?
[MTCB Android Head Units Q&A] COURSAROS:
VIDEO IN YOUTUBE:

"Ремонт Магнитолы из Китая RK A701 или rk 7721a Wi Fi Usb gps Bluetooth"

IT WORKS VERY FINE
[MTCB Android Head Units Q&A] bricomann:
your process to recovery give nothing no blink or switch off

i have make a romdump with this process http://droidorigin.blogspot.fr/2013/10/how-to-easily-dump-stock-rom-of-your.html , give a email for get the link ..
[MTCB Android Head Units Q&A] jacoooo82:
hi to all

so.....how to put that think in rcovery mode lads....??
[MTCB Android Head Units Q&A] monza20vt:
Sweet thanks Bricomann - email is scottspamblock at gmail .com :) Shame about the recovery process :( I will have a look if I manage to unbrick it! see if we can get some development going for this unit.

---------- Post added at 04:57 PM ---------- Previous post was at 04:56 PM ----------

Not found a way yet there is a reset button paperclip type top right. I got a black screen by holding back button whilst resetting but no recovery mode :(
[MTCB Android Head Units Q&A] monza20vt:
Hi Bricomann,

I have the romdump thanks :good: it only looks to have the system.tar and not the .img for recovery boot etc. Could you maybe try this method?

http://forum.gsmhosting.com/vbb/f90...ow-dump-rom-rockchip-share-azimbahar-1754571/

or this one?

http://androtab.info/arm/rockchip/devel/rkutils/

:cool:
[MTCB Android Head Units Q&A] bricomann:
i Cant not test this , adb is one pc app and we cannot connect this to a pc , look this link

looks like rk-a701 but have no found full info yet

http://4pda.ru/forum/index.php?showtopic=760512 http://4pda.ru/forum/index.php?showtopic=704934 to translate toyour language , the 2 link give other bootloader method ( half of the page )

also look in that folder of romdump system.tar\.\bin, there is 1 file named recovery 462 ko but I do not know what it is
[MTCB Android Head Units Q&A] monza20vt:
The commands can be run from a terminal rather than adb :) i will take a look at the links :good:
[MTCB Android Head Units Q&A] bricomann:
i have tested similar method with no result and your 2 link : this command cat /proc/mtd give no result

and this /data/rkdump /dev/block/mtdblock1 /sdcard/kernel.img give kernel.img not found
[MTCB Android Head Units Q&A] monza20vt:
That's strange, maybe the layout in these units is different, there are some alternatives listed here if you can try them? should list the partitions to then create an image file. I think maybe the sdcard loction is different on these devices. /mnt/external_sd possibly.

http://android.stackexchange.com/questions/92565/how-to-list-all-major-partitions-with-their-labels

:good::fingers-crossed:
[MTCB Android Head Units Q&A] bricomann:
i have found why this command cat /proc/mtd give no result ... mtd file is empty

and this /data/rkdump /dev/block/mtdblock1 / ............ mtdblock1 does not exist........ he is named mmcblk ...... 0 .....01p

I will extract files ,,, show link http://www.hostingpics.net/viewer.php?id=551613IMG20161031163440.jpg
[MTCB Android Head Units Q&A] Cid6.7:
It shows it has wifi but has anyone connected to the innerwebs with one ? How well is the signal ? I see no wifi antenna so it must be internal.. ?
[MTCB Android Head Units Q&A] monza20vt:
Ah thats where it is! If you can dump those that should be what I need :). i think i have it booting now as my phone connects to it and pops up a notification :good: The russian site looks good but the firmware files are different still trying

:silly:.

---------- Post added at 11:19 PM ---------- Previous post was at 11:17 PM

The wifi is internal i think it is on the back of the display board. i have used it seems fine :good:
[MTCB Android Head Units Q&A] bricomann:
Ah thats where it is! If you can dump those that should be what I need :). i think i have it booting now as my phone connects to it and pops up a notification :good: The russian site looks good but the firmware files are different still trying

:silly:.

I upload all the files except the user and userdata
[MTCB Android Head Units Q&A] 1birbmanq:
By way of update, I ordered a 3g dongle and it should arrive by the end of December. I'll report back on if it works/how well it works and what apps can use data from the dongle.
[MTCB Android Head Units Q&A] nelbarn:
I'm looking at buying this unit - "Double Din Car Stereo GPS MP3/MP5 Player Bluetooth FM Radio USB Android 4.4 UK" on ebay. It's much cheaper than any other 1024*600 display Android headunit.

I had a few questions before purchasing:

I was wondering if anyone has had any success in flashing other roms to it?

Also has anyone been able to get bluetooth tethering to work? I imagine that would be less draining on my phone's battery than wifi tethering.

Can this unit be matched to any other model that has been identified on xda?

Could someone post the MTC code in settings/about, so that we the manufacturer can be identified.
[MTCB Android Head Units Q&A] alkhs:
I have bought rk-a701 and i made a mistake of reseting steering wheel and he panel keys

i cant learn to knob the volyme + or -

so can you tell me to fix it,or send me the import system configuration,thank you in advance,its my first post and im not accustomed to it coming from Greece.
[MTCB Android Head Units Q&A] denninio:
Bricked....

I totally Bricked my RK-A701 after i tried the "simulate secondary display" in the developer options....

Has any one had any luck with entering recovery mode...

It still connects to my phone via Bluetooth...but screen is stuck at Warning! Don't watch video while driving...or something like that...
[MTCB Android Head Units Q&A] 1birbmanq:
As simple as it sounds, pull the wiring harness and all other wires from the unit for 24 hours, then plug it all back in.

That may work, at least worth a try. It fixed my problem at least.
[MTCB Android Head Units Q&A] thatsbk:
You can turn off the annoying beeps after you enter the code "66668888" into the factory settings password.

Everytime I try to use kingroot it reads the rk3188 chip. But it tells me kingroot is "currently not available" anybody have any tips?

I also read that if you hold reset and power while the device is booting, and release the reset button after 5 seconds, then wait about 20 and insert a usb drive it will enter recovery mode. Anybody try this? I really want to get this thing rooted.

Or how can I flash a different rom? Do I need root to do that?

EDIT: [youtube]MrFPK1crW8o[/youtube]

I managed to get mine rooted! I noticed that when kingroot says root is unavailable, there's a little bit of a blue box at the bottom of the screen that you can click on. If you have an Internet connection it should go through the process and root your device.

Regarding recovery, I managed to get my unit to the screen with the red exclamation point. I used an app called Quick Reboot. It boots up right to the recovery screen. (red exclamation point) but I'm not sure what to do after that. I can hold the back button and it powers down. Then If I hit the reset button. It will reboot normally. I apologize I don't have more useful information. But Im happy to help anyone try and figure this out.

?
[MTCB Android Head Units Q&A] dezara:
I was on the fence about getting this. i'm glad I found this. like a previous poster I couldn't figure out if it had WIFI. ebay seller has not gotten back to me. it's also said in one place that It was ipod ready. has anyone hooked that up? it's hard to give up 160gb worth of music :)
[MTCB Android Head Units Q&A] thatsbk:
Wifi works fine on my unit
[MTCB Android Head Units Q&A] dezara:
Hello!

So ebay dealer got back to me and said that it did have Ipod support. I ordered this last week its in transit. This website is amazing and I've learned a lot about how these work. I have used some custom ROM's on android TV boxes so i'm pretty excited to get this. I'm no developer but I can follow instructions with the best of them :) questions though did we ever figure out what the MCU is? Also since there is no Ipod support for android that is being handled by MCU. A native app if I'm getting the terminology correct. If you upgrade with Malayske's firmware I wonder if you lose that? Since is has no separate cable for this. I'm wondering if one of the USB ports is separate from the android side? Or does it work that way? Did you ever get the USB bluetooth to pair with your BT ODBII? Recovery mode? When I get this, before its installed or add anything to it. would it be helpful to make a stock backup and post it somewhere? Also if this MCU is not listed in the setting section. Do you want me to open it up and look at the chipset? Does anyone have a online version of the instruction manual? Don't you hate buying something and having to wait for it!!!! Sorry for all the questions. Also to Jean Sch : You can tell me how you have it installed on your car. I do not understand how I get with the cables. I Drive Polo 9n 2004ï»¿ haha I'm just kidding that's not me. Thanks for the videos though!
[MTCB Android Head Units Q&A] ckeays:
Needs external Wifi antenna

I have connected with wifi but I had to bring my WiFi access point into my car (in the driveway) and place it beside the unit. Crappy internal wifi antenna in this unit! I can't ever see using wifi anywhere with this unit.
[MTCB Android Head Units Q&A] 1birbmanq:
Tried 3g gsm dongle in rear 2 and front USB ports and none pulled up 3G on the device. The dongle lit up so it got power, it just didn't connect.

This isn't to say it's impossible, just that I didn't get it to work.

If you try and it works, please post details.

I'm rooted if that matters.
[MTCB Android Head Units Q&A] sgyr:
Hi !

Read this review :

mysku.ru/blog/aliexpress/47351.html

This person was able to connect the Huaway dongle E1550 with root KingrootV5.0.0_C161_B365 and programs PPP+Widget_1.3.6.

Read to the end of the review P.S. resume, and in the comments he describes in detail and gives links to where he took the program on 4pda.ru.

Here is his video :

youtube.com/watch?v=ulw6BL2mpBE

ATTENTION ! I DID NOT DO IT ! ALL YOUR ACTIONS ON YOUR OWN RISK !
[MTCB Android Head Units Q&A] lucandy6933:
Hi. How did you turn off the BEEP, i can't turn it off, and can't find the option. Can you explain better or make a video? And somewone knows how to remove the "function dot"on the screen? Thank you
[MTCB Android Head Units Q&A] thatsbk:
If I remember correctly. You turn the beep off in the function menu. I can make a video tomorrow for you.
[MTCB Android Head Units Q&A] Gargantua161:
Beep-off

beep off ---setting-system setting -function setting -keypad tone -uncheck﻿
[MTCB Android Head Units Q&A] krystian66:
how to restore the factory settings have uploaded bad boot logo and the radio I loops. I'd have to delete a file bootlogo or restore android.
[MTCB Android Head Units Q&A] sgyr:
Has anyone connected the camera to the DVR app ? I tried to connect a cheap Chinese webcam for a computer, it image not on the device. A web camera can be used for DVR ? If so, what kind ?
[MTCB Android Head Units Q&A] madfdg:
Greetings

I just bought this unit and i have a problem when i try to play some vids on it. To be more specific when i start the car i get an annoying message "Don't watch video when you drive" and exactly the same message when i try to play a video, no matter if my engine is running or not, i get only voice! Does any1 has any solution about it?

And i agree with ckeays , the wifi is crappy on the device :(
[MTCB Android Head Units Q&A] Gargantua161:
I write on the forums that is such a model may come -find aliexpress

name-Android DVD Player USB 2.0 DVR Front Camera Digital Video Recorder DVR Camera 720P HD

---------- Post added at 08:20 PM ---------- Previous post was at 08:16 PM ----------

to remove the inscription "Don't watch video when you drive" during video playback

connect the wire BRAKE (Brown) to the wire GROUND (Black)...

about wi-fi- I catch the street from the router in the apartment on the 3rd floor
[MTCB Android Head Units Q&A] madfdg:
Thanks for the reply Gargantua, about the wifi im just 10meters from the router, my smartphone gets the signal without any problem but the headunit refuses to connect lol
[MTCB Android Head Units Q&A] allexey1:
Hello guys,

I'm waiting for my unit to arrive. It's at the post office or somewhere :)

Reading all this thread I did not see if any of you managed to make working the steering wheels. If any, you use them via CAN or by direct connection?

Tnx.
[MTCB Android Head Units Q&A] nelbarn:
My unit arrived a couple of weeks ago but it's been quite a job getting it working in my Nissan Qashqai (2007).

After connecting the unit the steering wheel controls weren't working, in spite of me going into the password protected system setup area and entering the Learn Soft Keys option to enter what looked like the screen that would be for learning the Steering Wheel controls. It wasn't until a few days later that I realised that the correct screen for learning Steering Wheel Controls was in the "Function Setup" menu. Initially I was confused as to whether it should be the CAN RXD and CAN TXD wires from the unit to my Steering Wheel control A & B wires. I subsequently worked out that the WC1+ and WC2+ were the wires that should be connected.

A further problem occurred when I tested the GPS. I attached the SMA connector from the GPS receiver to the unit but initially it would not provide a location or connect to any satellites. However, I suspect it must have been a problem with the way I connected it as I unscrewed and rescrewed the connector and it immediately worked fine, even though the receiver is hidden under the plastic dashboard.

My only remaining problem is that I cannot get any sound from the unit. I've checked and checked again the connections and using a mulitmeter have ascertained that the positive and negative wires for each speaker are outputting 6V+ DC. I've done a battery popper test and the speakers produce sound via that method but I can't get anything out of the headunit through them. Any thoughts on this would be gratefully received.

Also, has anyone now tried to flash a different ROM onto the headunit? What were the results?
[MTCB Android Head Units Q&A] krystian66:
Is anyone able to help me, because my equipment manufacturer does not speak

Does anyone have the software or it can rip and share?
[MTCB Android Head Units Q&A] grogan197:
What Sat Nav apps are people using? I downloaded the maps for igo which came installed and that works fairly well but occasionally it brings up a file not found error when staring up and I have to reboot the unit to get it to work. I'd like to try Sygic or CoPilot but both say they are unsupported on the Play store.

You can connect to OBDII but so far I have only managed to with a WIFI OBDII dongle. It works well though and if you have a Ford try the ForScan app, work really well. The unit works well when paired over bluetooth for playing music from your phone and for calls but not managed to get bluetooth to work for much more that that.

You can turn this off in one of the settings menus (it may be in the password protected menu)
[MTCB Android Head Units Q&A] stealthninjax2:
Different Launcher

I really dont like how the home screen has the red tabs at the bottom. I tried installing other launchers but when I turn the unit off and then turn it back on, I just get a black screen because Im guessing it tries to load the stock launcher but the custom one interferes. So what I would have to do is toggle the wifi on and off and long press the notification to go into app info, then through that I can go to all the apps and uninstall the custom launcher. The unit would then work again as normal.

So has anyone been able to put a new launcher on this unit? Such as go launcher, apex, nova, etc

__________________________________________

Edit: After trying a few, solo launcher works
[MTCB Android Head Units Q&A] Chewi3:
I have recently got one of these. WiFi seems to work fine indoors but as soon as unit was installed in the car it is hopeless.

Want to try and teather to my phone using USB so that I can access network via the phone's WiFi. I think this will require rooting though which will be my next job.

I have installed Here WeGo maps which looks good. Unfortunately it seems to have a bug relating to landscape and/or low res screens which prevents the app Settings from being displayed.

I have a USB Bluetooth dongle - does anyone know if once routed this could be used as a second bluetooth interface (for OBD2 or teathering to phone)?

Any more info / tales of experience with this unit would be most appreciated :fingers-crossed:
[MTCB Android Head Units Q&A] krisboats:
Just got one of these for christmas 2 days ago. Unit is installed and working however i would like to change some of the aspects of it. Is there any way to change the app install directory size? It says it's loaded with 14gb, but 11.8gb is set aside and labelled as maps as an other SD card, leaving just 1gb for apps and programs. For most apps the option to move to SD card is greyed out. Is there a way to enable this so i can put more things on it?
[MTCB Android Head Units Q&A] dezara:
MCU

Mine arrived for Xmas. . I opened it up, chipset says STM8S207 . Ipod connects but does not play. Using the file explorer I can see files on the ipod. So maybe I can find something to read the .mp3 files. I e-mailed the vendor. To see if I'm just not doing something right but I've been through all the settings. Wi/Fi works fine inside. Its to cold to install :) It didn't see my blue tooth dongle. However I have a Logitech BT wireless mouse that connected and worked with no issue. Mirrorlink worked with no issue. It said that it would come with GPS maps but I'm not seeing any and starting IGO app it states no maps available. I figure once I finish hassleing the vendor about the IPOD i'lI ask about that. I hope you all had a nice holiday and Happy New Year!!!
[MTCB Android Head Units Q&A] krisboats:
Yeah, i didn't like the igo maps so set the GPS button to open google maps instead. Couldn't get a bunch of things to download on the playstore either so got a newer playstore apk from apk-mirros and then installed all the programs and apps i wanted. Downloaded kingroot a few minutes ago and installed that. The version linked to in this thread (4.9.5) didn't sork for me so updated to the latest version (5.0) and it rooted the unit fine. So now need to look at moving some of the program files over onto a seperate storage area.
[MTCB Android Head Units Q&A] abd12:
Hi I recently bought this but i am having problems the unit keeps on restarting by it self after ever one minute . Any solution ?
[MTCB Android Head Units Q&A] stealthninjax2:
maybe check your wiring
[MTCB Android Head Units Q&A] Chewi3:
Make sure that your connection to ground is good. I initially didn't, and the backlight on the unit would turn on and off every few seconds.
[MTCB Android Head Units Q&A] dezara:
Message and reply from vendor, I have no idea what this means. :)

Thanks for your message.

Could you please put all of the files at the root directory ?

Please don't put in under any folders.

Then connect with USB cable to check.

Waiting for your reply and we will do solve the problem properly for you.

Device is a Ipod it does not have bluetooth only connected by cable you are thinking IPhone with Bluetooth. the information provided on the auction was and by email is Ipod ready. I have a Ipod classic connection with standard cable to usb port. also aution states IGO map is included in can't seem to find that either.
[MTCB Android Head Units Q&A] Chewi3:
It sounds as though they are asking you to put the music files in the root directory of the iPod (and not within any folders on the iPod)... In your previous post you said that you could see the iPod in the file explorer? If you click (touch) one of the music files through the file explorer does it play in the music player? I have been playing music from a USB drive that way.
[MTCB Android Head Units Q&A] Habieru:
I have this unit as well. Bought at eBay from the cheapest seller avaliable, it was arround 108$ without any discounts.

So far i can say that the WiFi range is pretty bad, i have to drive the car inside the house about 3M away from the router to get a stable connection, if i'm any further, say 10m away, the headunit connects and shows rather good signal strenght, about 3/4 bars, but once you try to load something from an internet browser or play store the signal drops to zero instantly, go figure.

The default launcher has a bad habit of putting random icons on the last page of the main screen after every restart.

1GB of app storage is an abomination, just google services and a couple of mandatory updates already take a good 300MB out of that GB, and soon enough the application data and their cache take another big chunk. This is one of the first issues that we should address if we want proper functionality.

There are plenty of car boot logos to choose from, lucky me there is no logo for my car ( Tuscani Elisa), and i can't figure for the life of me how to import the ly_boot_logo.bmp file it asks from an USB drive, i tried a couple of different pendrives without success, it cant find the file neither in the USB nor in the SD cards. I made my own 1024x600 logo in photoshop and saved it as a standard 24bit BMP with no luck.

Now that I am done with the rant, there are also good things for this device.

The amplifier is surprisingly good, i come from a single din Pioneer 9800-BT and the sound power is somewhat similar, not the same quality and ammount of sound proccesing options though. I knew it was going to sound way worse than the pioneer, but i'm getting old and tired of 1000w subwoofers and i dont want to end deaf in my 40's, so this is just what i was looking for.

The GPS reception is nice aswell, it locks pretty much the same instant you launch your gps software.

The screen is pretty sensitive wich is a good thing.

---------- Post added at 09:12 PM ---------- Previous post was at 08:59 PM ----------

And well, this is just something i came up with wich someone else may find useful if a car does not have steering wheel controls, so it might be worth the read if that is your case.

My car doesn't have steering wheel controls, so i came up with this idea of using one of those 5$ universal steering wheel controls sold in eBay or Aliexpress that have learning feature from other remotes.

What i did here is use a tiny wired USB infrared receiver that came with a PC remote control that i had ( the one you usually use or buy for media centers ) and connected it on one of the USB ports on the back of the unit. Turns out that it works flawlessly and has all the media buttons, cursor keys, enter, esc, etc.... So i took that universal steering wheel remote and used the learning feature to record all the commands from the PC remote in to the steering wheel remote.

So now i have full control of the unit from the steering wheel, wich is awesome since it is my first time in 13 years of ownership of this car that i get to control anything from the steering wheel.
[MTCB Android Head Units Q&A] dezara:
Turns out the VLC android app can read the ipod. it also correctly reads the album song names :) little things. shuffles all the biz. I use the VLC widget to control.