yashsingh1/xdaforums huggingface dataset:
[MTCB Android Head Units Q&A] cadillackid:
has anyone changed the device type in their build.prop? if so, what do you use?

I notice a lot of apps on google play say "not compatible with your device".. yet when you get the APK files they work fine.. ie ALK copilot and the traffic pulse app are a couple of them..

not everything is easy to find as an APK on the net..

I had thought about changing the settings in build.prop. to something like a Galaxy S4 or some such..

I am a bit reluctant though as i dont have a front USB port(KGL) so i am concerned at how I can get into my unit if I were to Boot-loop and need to restore from TWRP backup..

how do you guys without front USB ports recover from a bootloop? do you install CWM or such? or since our bootloader is unlocked is it not needed?

Just getting ideas BEFORE I make a move that causes me issues... rather than after!! this way if there is something I need to do to prep I can still do it as my unit is still stock and running fine!

-Christopher
[MTCB Android Head Units Q&A] agentdr8:
I think most people just use Market Helper and select Galaxy S3.

Units without front usb seem to still have the solder pads for the usb connector, it's just absent. I'm guessing if you were to solder a female miniUSB on it could be used to get into bootloader.
[MTCB Android Head Units Q&A] derpderpy:
Pair Elm327 device

Has anyone had success with Torque and a Bluetooth elm327 device? It shows "CBT" available, and prompts to connect, but doesn't give an option to pair with a pin. Torque doesn't see the device because it is not paired.
[MTCB Android Head Units Q&A] uncleg:
You need another one elm327 that shows "OBD" name, or repack the MTCBluetooth.apk and Settings.apk files with the edit strings includes the "OBD" to change with your elm327 name i.e. "CBT"
[MTCB Android Head Units Q&A] makkan00:
How do you use wi-fi mirroring? Mine did not come with any clear instructions?

And re: Torque, I have BT obd reader. So I need specific one to work with my unit?
[MTCB Android Head Units Q&A] booroondook:
Place handheld_core_hardware.xml file to /system/etc/permissions folder.

You may take this file from another Android device (e.g. your smartphone or tablet) or from attached archive.
[MTCB Android Head Units Q&A] coppertop2000:
Is there an easy way to change the system partition size? I'm running out of room for apps. I've already moved what I can to SD card... But it's not enough.

The internal 8gb is partitioned already... There should be a way to change it, no?

Thanks in advance
[MTCB Android Head Units Q&A] parazit26:
do you know, if its possible to mount flash drives on the front usb port? because the usb ports on the back of my universal huifei dont work properly. i can mount a flash drive but after a couple of seconds the system removes the flash drive. Thats why i would consider to solder a port and use it for my flash drives.
[MTCB Android Head Units Q&A] cadillackid:
I havent had any issues mounting USB 2.0 flash drives on my unit, however USB 3.0 drives dont seem to want to work right.. you may want to buy a flash drive that is USB 2.0 or make sure that it is.. im Guessing our ports are USB 20 and some 3.0 flash drives dont provide proper backwards compatibility..

-Christopher
[MTCB Android Head Units Q&A] Reptile-X:
Same here never had a problem with mounting USB flash drives, don’t have front USB either. Both ports are used with a USB cable, one for 3G modem and the other for USB flash drive to side load apk’s and such. I use mostly a 2.0 16GB flash drive.

@cadillackid, to get apk’s without rooting or changing files in the HU, you can use APK Downloader, it is from same maker as the Xposed module Market Helper.

Or you can even use APK Extractor to get it from your own phone, just install the app you want on your phone and copy the apk file to your SD card.
[MTCB Android Head Units Q&A] parazit26:
I have tried many USB 2.0 flash drives and found one 2GB Sony that is working, but sideloading takes forever. Transcend 8GB can be mounted as well but takes forever to start playing a song and stops after a couple of seconds to buffer. Seems like the ports are very slow and can't keep up with the data stream.

[MENTION=3384004]cadillackid[/MENTION] do you have a front usb port?
[MTCB Android Head Units Q&A] staneb:
I have a Klyde unit and same issues with back USB. Until now, I found only one flash drive that works, it's a Verbatim 8GB. Meanwhile all flash drives work without problems on front USB.
[MTCB Android Head Units Q&A] cadillackid:
unfortunately I dont have a front USB port.. at least not one thats easily accessible.. I have a KGL-7506 unit.

instead I have an SD card slot on the lower left, and on the lower right I have a 3.5mm jack that I cant seem to find that does anything.. it doesnt seem tyo be an AUX in, or a MIC jack.. I rather wished it was a USB port instead!

I havent pulled the unit out of the dash to see if its there but hidden behind the faceplate.. im guessing though like another post above said, im going to need to solder one onto the board if I want it.

-Christopher
[MTCB Android Head Units Q&A] SkyBehind:
Could it be a misplaced SWC port? They use 3.5mm jacks. Probably not, just thought I'd throw it out there.
[MTCB Android Head Units Q&A] parazit26:
just tried to solder a port to test if its working. the flash drives led is flashing but the system doesnt mount it. you can see it on the pics how i did the soldering.

Pics USB USB2
[MTCB Android Head Units Q&A] agentdr8:
There are some custom system images in the 4pda.ru forum that have some built-in scripts to resize the /data partition. Don't know if anyone here has tried them yet.

---------- Post added at 11:27 AM ---------- Previous post was at 11:22 AM ----------

Take a look at dmesg and logcat to see if the system even sees the flash drive.
[MTCB Android Head Units Q&A] parazit26:
got the logcat and dmesg could take a look on them?
[MTCB Android Head Units Q&A] agentdr8:
Sure. Either attach them to a post or use the CODE tags.
[MTCB Android Head Units Q&A] parazit26:
thank you very much! files are attached.
[MTCB Android Head Units Q&A] coyttl:
It looks like it's mounting to /mnt/external_sd2 .. once you plug it in, can you open a file explorer and see if you can access the directory? If not, that's odd..

(Though, on your device, the sd2 may be the actual SD card or the GPS card.. on my device, it's USB drives.)

Edit: Nevermind, I see the controller is giving an error -

<3>[ 67.007861] hub 1-0:1.0: unable to enumerate USB device on port 1
[MTCB Android Head Units Q&A] makkan00:
Has anybody installed Sygic on this unit?

If yes, and if its working then can you share the folder allocation please?

I have downloaded Sygic and have following folders

Sygic

maps

voice

apk file

Now I have put all these folders on the root of SD card, installed the application.

Each time, I run the app, it start downloading resources and crashes.

Do I need to copy all the stuff from Sygic folder and paste it in root as well?

Thanks.
[MTCB Android Head Units Q&A] agentdr8:
It doesn't appear to like your flash drive. You could try a different one.

I'm not sure if android uses the ehci_hcd module or if it's compiled into the kernel.

http://www.geekdevs.com/2010/04/solved-unable-to-enumerate-usb-device-disabling-ehci_hcd/
[MTCB Android Head Units Q&A] hititup:
Guy like how the >>Android 4.4 HD 1024*600 Capacitive screen Car DVD Player GPS radio HU is out will we find support here on the forum or a New forum will be started for it?
[MTCB Android Head Units Q&A] parazit26:
[MENTION=4061830]coyttl[/MENTION] I have tried solid explorer and the stock file manager but the system doesn't see it.

[MENTION=434511]agentdr8[/MENTION] I will try it later today and let you know.
[MTCB Android Head Units Q&A] anan2046:
Suggest you contact the Erison customer service directly. Maybe they would help you.
[MTCB Android Head Units Q&A] typos1:
I guess the 4.4 versions will still be supported in this thread seeing as its just a software update and (finally) a screen res change, but still RK3066 based.
[MTCB Android Head Units Q&A] staneb:
I have a same problem with my OBD scanner and did what you suggested here, changing the "OBD" in MTCBlueTooth3.apk and Settings.apk with "Vgate" which is how my scanner is identified. Decompiling and recompiling was done with APK Studio, then I used ES File Explorer with root access to overwrite the existing files in system/app folder with newly compiled files. I also changed permissions to rw-r-r. Now the Settings.apk isn't loaded.

I must mention, that when decompiling I had to use "apktool d -f -r" command to keep resources untouched. If I didn't use this command, recompiling gave error and didn't result in a new apk.

What am I missing, or if there is someone that can recompile these two files for me using "Vgate" as OBD name? Attached are the original apk's and framework-res.apk
[MTCB Android Head Units Q&A] typos1:
Just came across this, it may be a solution for people who only have partially working dual channel CAN Bus:

http://www.connects2.co.uk/ProductOverview/Infodapter.aspx
[MTCB Android Head Units Q&A] dmandn:
Has anyone had any experience with Ownice brand? These look tempting: http://www.ownice.com/Pro_Car_dvd_player_for_VW_S8901_349.html
[MTCB Android Head Units Q&A] parazit26:
this command doesnt work and i get the message "no such file or directory"

right now i am running huifei mcu.img and kld update.img. maybe i should try flashing the 1.77 huifei kernel only or do you think its not relevant? i think someone posted it in the prevous posts.
[MTCB Android Head Units Q&A] typos1:
No, but seems like an upgrade to these units using an RK3188 quad core board. The specs suggest its a KGL unit, or at least uses the same peripheral components as the KGL dual core RK3066 units in this thread.

Its about time someone upgraded them to the 3188 as well - the 3066 is getting on for 3 years old and some people say that it cant handle running GPS, music and a dash cam all at the same time, quad cores and 2 Gb of RAM should help there - I ve got a 3188 TV box and its pretty zippy.
[MTCB Android Head Units Q&A] Billkaza:
I'm trying to read all this thread but i am still a bit confused..

What the differences between KGL and KDL and other (if there are)?

I'm searching to buy one for my Golf 6 that looks as RNS510

Have you got something to propose to me because as i have understand there are a lot of companies producing them with same specs and internal hardware.
[MTCB Android Head Units Q&A] Warlord711:
KGL, KDL, Roadmaster, they seem to be be the real manufacturer of those units, while they are sold by a lot of different companies, under different names etc.

I think the KGL-7698N comes as close as possible to the RNS510 look.

http://kaigele.en.alibaba.com/product/1656512110-221015458/HuiFei_android_car_dvd_with_A9_dual_core_8G_flash_for_VW_Polo_Jetta_Passat_Golf.html
[MTCB Android Head Units Q&A] Billkaza:
http://www.ebay.co.uk/itm/7-Inch-Ca...6-/281418194566?ssPageName=ADME:X:RTQ:GB:1123

This one above supports dual canbus with display on the instrument and external jack but is it any good?

i cant understand its brand

All these units comes with Audio amplifier TDA7388?
[MTCB Android Head Units Q&A] typos1:
It does say on the first page the differences - they are slightly different components on the main (non Android) board and MCU - amplifier chip, radio chip, etc.

Its "KLD" NOT KDL - short for "Klyde" by the way.

They all support dual channel CAN Bus, its just that it doesnt necessarily work on all cars.

Again, it clearly says in the guide the different audio components used, they dont all have the TDA7388, look at the link to the specs for each version on the first page.

The one in that link is unknown currently - it has the Klyde luancher, but the back looks different ot the KGL, KLD, GS and RoadMaster versions, it may be one of the newer "JY" versions that we dont know much about yet. Other versions use an STMicroelectronics TDA7384 or a Toshiba TB2929, not heard of any using a TDA7388 before.

---------- Post added at 01:49 PM ---------- Previous post was at 01:47 PM ----------

Has anyone tried to play .flac files ? The stock music player is supposed to play them but it doesnt on my Klyde, I installed the modified music player from the KGL and that doesnt either. The only way it will play them is if theyre re-named .wav, anyone else experiencing this ?

Also, if I install Torque Widgets, I only get the choice of one (the OBD toggle), there should be 2 sizes of dial as well, but they dont show up in the standard launcher, only the OBD toggle, this is very strange - I ve installed Nova and they show up then, but you loose the stock music and radio widgets then.
[MTCB Android Head Units Q&A] Billkaza:
Just saw your PDF attached explaining differences..
[MTCB Android Head Units Q&A] Aaaron16:
How to Change Hard Key Mapping?

Does anyone know how to change the mapping of the hard keys? Specifically, I'd like to remap the DVD button to take a screenshot for debugging purposes. Also, I noticed some buttons don't behave properly and would like to sort them out.
[MTCB Android Head Units Q&A] elcolombia17:
I think the trick is in keylayout inside rom(system folder)

I want to remap source key on mine
[MTCB Android Head Units Q&A] kaliif1234:
Look here, post no 1367 , maybe helps.

Its copy from XDA forum

4pda.ru/forum/index.php?s=&showtopic=557670&view=findpost&p=32562883
[MTCB Android Head Units Q&A] parazit26:
Does anyone know, if it's possible to get rid of the stock statusbar and get the original android nav and statusbar?
[MTCB Android Head Units Q&A] dmandn:
Just found this 4.4.2 unit, seems to have similar specs and if I am looking at right pics it looks like it might be a kgl. http://www.aliexpress.com/item/2014...-For-VW-Golf-Passat-Polo-With/1567863984.html
[MTCB Android Head Units Q&A] agentdr8:
The one provided doesn't appear to be too heavily modified from stock, aside from some color changes and possibly some dimensions here and there.

If you're just wanting to do away with the button overlays, you could probably freeze MTCKeyfun.apk with TiBu. And if you don't like the foreground application name in the statusbar, you could use a different launcher.
[MTCB Android Head Units Q&A] ProfessorKnox:
Sorry, post #1367 here in this discussion handles a different topic, and trying to use your link just leads to the overview page of 4pda forum.

Can you please fix this? Thanks
[MTCB Android Head Units Q&A] proenergy:
Which device have I?

Hi,

I have the following device:

http://www.aliexpress.com/snapshot/6156042952.html

Now I have the problem with boot. The unit still stay by booting. I see the boot logo and than is commin nothing.

I will update but I don´t know which unit that is. (MCU?)

Item specifics

Special Features: DVD Player,Bluetooth,Built-in GPS,CD Player,CD-RW,MP3 Players,Radio Tuner,Touch Screen

Placement: In-Dash

is_customized: Yes

Brand Name: Rhythm

Model Name: RM-MD11

Resolution: 800 X 480

Car Maker: Interchangeable

Out Power: 4X45W

Material Type: Plastic/Metal

OSD Language: English

Digital Media Format: CD,DVD-R/RW,DVD-RAM,Video CD,Mp3,Mp4,WMA,JPEG

Color: Black

Display Size: 6.2"

Item Size: 178 x 100 x 165 mm

Voltage: 12V

Item Weight: 4 kg

OSD: Russian, English, Spanish, Portugese

Language: Multi-Languages

Product Description

Features:

1.OS: Android 4.2.2 system

2.CPU: Dual Core 1.6GHz

3.Memory:1GB DDR3

4.Nand Flash :8GB

5.USB 2.0 OTG,HOST interface

6.Video format:RMVB,MKV,MOV,WMV,AVI,MPG,TS with 1080P H.264 format etc. alomost all format was supported

7.Audio format: MP3,WMA,WAV,OGG,FLAC

8.Temperature:-20c TO +70c
[MTCB Android Head Units Q&A] typos1:
I think that is a RoadMaster unit, but you cant go into the about screen to check if it wont boot, I take it you can get into recovery ?

It is not too important what version yours is though because it is probably a problem with the Android side of things, not the MCU side, so forget about the MCU update at the moment, just update the Android part - the KGL, KLD, GS and RoadMaster Android updates are interchangeable so it wont matter, ignore the MCU update and just install the Android update.

Once youve got it working again you can check which version it is and update the MCU as well.
[MTCB Android Head Units Q&A] Skitals:
I heard back from the seller of this 4.4.2 unit, which lists "RK3188 1.6GHz Cortex A9 Dual-core" and Mali-400MP4 GPU:

http://www.aliexpress.com/item/1024...ar-DVD-GPS-For-VW-with-1-6GHZ/2051007281.html

He wrote:

That means the GPU listed is also wrong (should be Mali-400 vs Mali-400MP4). Still trying to get a copy of the update.img for the 4.4.2 system, but no luck :rolleyes:
[MTCB Android Head Units Q&A] typos1:
Bugger ! The RK3188 would be great, theyre cheap and I cant see it being that hard to simply replace the RK3066 board with the 3188 one, just a few software tweaks surely ?

I asked Klyde about a 4.4 update and they said "it can't update to android 4.4 directly. but now we are trying to let it come ture ,it also need some times"
[MTCB Android Head Units Q&A] parazit26:
I dont think they have units with 4.4.2. I asked them as well for the mcu.img and update.img and they mentioned MTCB-KGL-2.03 but they said they have no update.img. So it could be, that they fake the descriptions same as with the RK3188 and if you get the unit they will just say that they made a mistake. I am not totally sure about it, but it can be possible.
[MTCB Android Head Units Q&A] Skitals:
Just based on the screenshots of the OS, it's definitely 4.4.2. Looks identical to the units GreenYi is selling, which actually has a photo of the about tablet screen showing 4.4.2 and rk3066. But even GreenYi lists the GPU as Mali-400MP4 which I don't think exists paired with rk3066. Still a crapshoot until someone places an order and verifys everything :)
[MTCB Android Head Units Q&A] ptclabs:
4.4.2

After talking with all of the makers. The problem with upgrading to 4.4.2 is that the programming for apps between the 2 has changed significantly. Many of the commonly used functions have changed. They have to rewrite all the apps.
[MTCB Android Head Units Q&A] KeiserSozeyFr:
CarService V2.0 with new feature !!

Hello !!

I've been out from this thread for long and I received several emails with requests for modifications on my app.

I added some of them, so please tell me if it's working as you expect.

And I added a new feature :

By installing a client application on your phone (RemotePhoneStatus), you will be abble to see the battery level, charging state and network status (signal, network type) on your head unit. On notification bar (only battery level for the moment) and on a widget.

The phone must be on the same WiFi network as the head unit. It works also if the head unit is connected to the phone by using it as a WiFi access point.

Well, for the moment, RemotePhoneStatus drains too much battery if it is always enable. So it is highly recommended to enable it only when you are using your unit. I know how to improve it significantly and I will do it for the next release.

You can enable and disable the service with trigger or tasker.

More info here:

http://xdaforums.com/showpost.php?p=53678587&postcount=1179

enjoy !
[MTCB Android Head Units Q&A] Skitals:
This update sounds awesome, can't wait to try it out. Thanks so much for your hard work!
[MTCB Android Head Units Q&A] Mr_Leetness:
New MTCB-GS v2.02 unit

Hi, I'm new to this forum but I've read a lot about this android based head unit. The other day I received my HuiFei clone from a AliExpress seller. I'd like to share you some details about it because it seems that I've received a newer version compared to all the other devices in this thread. See attached files.

My unit is made for Ford cars like the Focus, Mondeo and S-Max. It supports the steering wheel buttons but it seems that it's not possible to change the key mappings via the menu. Also the information in the instrument cluster is lost, no more radio, audio, telephone information is shown. Like other owners in this thread I'm also getting the static noise when the key tone function is enabled, so disabling is still the workaround?

I'm happy to deliver some information and hardware specs so that it can be added to the pdf from the start post. I'd also like to know how to install TomTom on this device. Has anyone a guide?
[MTCB Android Head Units Q&A] proenergy:
Hi,

ok i forget the MCU update. Where can I found the Android firmware (download) for my unit?

Thx
[MTCB Android Head Units Q&A] typos1:
Hello, GS V2.02 has been out since August, it is not newer than the other devices in the thread - many people have V2.02.

If it says "GS V2.02" in the about screen then it is a GS version, not a clone - GS (Hot Audio) are one of the 4 known manufacturers of these units.

None of the units allow you to re-map the SWC buttons, but you can install XposedMTC and do it yourself.

As for TomTom, if it does not show up in the Paystore, then put it on your phone and use APK extractor app to extract the apk, then sideload it onto your unit. I m afraid I cannot remember whether it works on these units or not, but using the thread search to the right you should be able to find out if other people have had experience with it.

---------- Post added at 11:29 AM ---------- Previous post was at 11:26 AM ----------

On the first page of the thread where it says "Firmwares KGL/KLD/GS/RM" there is a link.
[MTCB Android Head Units Q&A] Mr_Leetness:
Thnx, it seems I've got the Hot Audio version :)
[MTCB Android Head Units Q&A] liquidini:
Give source to the people and Android 5.0 will be available with this headunit...

rk3066 kernel source is available from rockchip. If we could only find the MCU sources...

I think that there should be a new topic with more "dev" information about this unit....

Some custom rom from russian forum

http://4pda.ru/forum/index.php?showtopic=557670&view=findpost&p=34726519

Density from 240 to 180 is interesting. Is there an app that can make this?
[MTCB Android Head Units Q&A] _arecki_:
This unit is no longer available. It looks like this seller is no longer selling anything, I wonder why... :)
[MTCB Android Head Units Q&A] Warlord711:
https://play.google.com/store/apps/details?id=com.theSushi.dpichanger

Or use the Xposed Framework, i think DPI Changing is a buildin feature, not sure.
[MTCB Android Head Units Q&A] typos1:
There are lots of screen density apps in the Playstore.

I ve seen this firmware before, but as many people have said that the Klyde firmware is better, I d like to see all the changes in this custom firmware, made to the Klyde firmware, personally.
[MTCB Android Head Units Q&A] booroondook:
Need to fix several serious bugs:

1) "Play/Pause" function in fact acts as "Play" (and its toast also shows "Play)

2) "Pause" function doesn't work and doesn't show its toast

3) SWC Service continues to work even after switching off
[MTCB Android Head Units Q&A] parazit26:
I got the info that the 4.4.2 update won't be compatible with the 4.2.2 units. First because of the resolution and the 7inch screen and second, the internal boards are modified and are not the same. But i think skillful people could port it for older devices since the main hardware will not change i guess. This new headunits will be out soon!
[MTCB Android Head Units Q&A] Skitals:
I really don't buy it... there are already 4.2.2 units with 7inch 1024x600 screens. Might be some minor differences, but I think it's mostly marketing to get people to buy new units. Hard to justify when the CPU and everything else is unchanged. Eventually a software update will be released for the 4.4 units and we can start to play :fingers-crossed:
[MTCB Android Head Units Q&A] ptclabs:
GS

I am not sure why people keep calling gs units hotaudio. They have 1-5 employees, are in an apartment building, and are a ltd (limited liability trading company) HK Circle&square Co., Ltd is their official name of their trading company. or is there another hotauto company i am missing?