yashsingh1/xdaforums huggingface dataset:
[MTCB Android Head Units Q&A] OlvrCA:
OK, I'll try that in a couple of minutes. Also, will the steering wheel buttons work even if the CANBUS adapter itself went bad? Because they do work, perfectly.

OK, I just tried it, still not working. I'll tried contacting the seller and asking for another CANBUS adapter then.

Thank you for your help!
[MTCB Android Head Units Q&A] brintros:
tomtom

sorry im with android 4.2.2 what version work please
[MTCB Android Head Units Q&A] zorantoma:
If the SWC work then canbus adapter works.I have the same problem if i go above MCU 1.77
[MTCB Android Head Units Q&A] MasterPrenium:
I can't, the unit is stucked on boot logo because of freezing (I think the wrong) application with titanium backup.

It's great I found someone having the same unit as me. If it's so tricky, maybe it's because the procedure isn't exactly the good one (maybe need to remove fingers half a second quicker ect...

When you say "second method" is it " --Update 2-- some others have this procedure (thanx [MENTION=1436975]R4D3N[/MENTION])" ? or " --Update-- some units without front USB have a different procedure" ?

I tested both, but focused on "Update 2".
[MTCB Android Head Units Q&A] zorantoma:
As our unit doesn't have volume knob(kgl8401) but the procedure is the same for me1.

Turn off the unit by holding 3-4 sec the power button.

2. Hold the RESET button + POWER button for 5 sec

3. Release the RESET button and keep pressing the POWER butoon for 2 sec

4. Release the POWER button and wait. The Recovery menu appears.

5. With the Volume knob you can move up/down and long press on Volume/Power button to select the option.

A thing it's a metter of miliseconds of pressing the buttons.
[MTCB Android Head Units Q&A] OlvrCA:
1.99 and then 1.77 worked

So, I ended up loading 1.99 and then 1.77 at the end and now is working fine! I guess they keep on updating the MCU's versions but taking things out as well. Weird.
[MTCB Android Head Units Q&A] zorantoma:
I think your right. The seller send me a modified version of 2.09 mcu for my unit and i will try it and if it works i'll post it.
[MTCB Android Head Units Q&A] slinkydonkey:
Hi how well do these devices work with steering wheel controls? I have a Kia Ceed 1999 I just want something that works out the box.
[MTCB Android Head Units Q&A] dannyw13:
Hey Typos - did you ever solve the constant backlight being on in your car?
[MTCB Android Head Units Q&A] parlato_edoardo:
Little update:

Sad but true, my JY HU has totally died.

Tried to connect with USB cable to my laptop. No devices detected. So no chances to use RKTools.

I'm going to buy a new one, this time I will try to update to KK only if some official releases or specific mods are coming.

See you when new HU arrives.
[MTCB Android Head Units Q&A] elcolombia17:
Nobody can tell me something about?
[MTCB Android Head Units Q&A] MasterPrenium:
When you did the reset, did you have the canbus box connected/enabled ?
[MTCB Android Head Units Q&A] typos1:
y, you must be getting confused with someone else, I ve never had that problem.
[MTCB Android Head Units Q&A] Steve-Austin:
BT

Hello,

I have issues with bt.

My smartphone is connected and I can use all functions but the recipient doesn't hear me.

Is it a MCU problem?

Can I try an other without flash the whole firmware (and how)?

THX
[MTCB Android Head Units Q&A] typos1:
Sounds like a mic problem to me.
[MTCB Android Head Units Q&A] Steve-Austin:
I don't think because it works before upgrading to a new version of JB or KK.

In fact, when the first time the smatphone is paired, it works like a charm.

After a reboot, that doesn't work anymore ...
[MTCB Android Head Units Q&A] MasterPrenium:
I had the same issue, my mic quality was really good with original KGL firmware, but after updating it become really poor. Maybe there was a fix for alsa inside the original rom.

(Now my unit is bricked so cannot test any more for the moment...).
[MTCB Android Head Units Q&A] webdude12:
I will try the new TWRP later on this weekend.

I tried to flash CWM Superuser and a couple of zips, all were failing.

But in saying that, I have finally got root. The implementation of SELinux was stopping everything. I want to flash back to stock recovery and untouch rom from that recovery and start over to make sure it works consistently. Also, fairly sure can build my steps in a zip that will root from TWRP once finished.

When I am done with all that I post complete instructions. I will also dump the untouched stock rom during this process.
[MTCB Android Head Units Q&A] dannyw13:
ah ok, do you have a generic radio or one the matches the interior of your car?
[MTCB Android Head Units Q&A] typos1:
Why ?

There are some people with this problem but I dont think anyone has sorted it.
[MTCB Android Head Units Q&A] dannyw13:
oh only ask as i remember you saying you have the Bose system so was thinking you got the same car as me

ah ok its not a big problem anyway can live with it
[MTCB Android Head Units Q&A] kuwacs:
I just upgraded to 1.99 on my KGL system (BMW).

Seems like I'm having some issues with the bluetooth. I can connect my phone, which works no problem. But I'm not able to connect my ELM327 adapter (CHX?) Whenever I tap it, it goes "Connection?" and I hit yes....then nothing happens. I installed the XposedMTC module, and am still unable to connect.

Also, it seems I can't unpair my phone from the headunit. Is this normal? I tried to delete the data/cache for the bluetooth app, and even the settings app with no luck.... Anyone have any ideas?

Thanks!
[MTCB Android Head Units Q&A] OneCheekyDevil:
Hey everyone

I'm wondering if i could get some advice here.

I received an Erisin ES9005A a few weeks back from ebay and i'm having a tiny issue. The ad said the unit could change its' button's light colours, but the one i received couldn't. It's missing the "ELEMENT" option from the settings. When i contacted the seller on ebay, she told me the unit got updated a week ago and no longer has that feature (yeah i know, go figure).

My question is, can i flash an older firmware to get the feature back, or do the newer firmwares have support for changing light colours?

My Unit - http://www.ebay.com.au/itm/14146339...m=R40%7CR40&_sacat=0&_nkw=141463398186&_rdc=1

MCU: MTCB-KGL3-V2.01 Aug 18 2014 15:00:40

Model: S07

Android: 4.2.2_14102014

Kernel: 3.0.36+ root@ubuntu #997 Wed Oct 8 10:57:45 CST 2014

Build: rk30sdk-eng-4.2.2 14102014.14:21:38
[MTCB Android Head Units Q&A] ktibor69:
Could you upload the specific files for the apk signing (*.pem, *.pk8):confused:
[MTCB Android Head Units Q&A] angusc:
I purchased the ES9001A which has the older 4.0.4 Android system. Maybe they could exchange your unit for the older one?

http://pages.ebay.com/link/?nav=item.view&id=200991743477&alt=web
[MTCB Android Head Units Q&A] zaphod2:
Sorry, I do not understand.
[MTCB Android Head Units Q&A] OneCheekyDevil:
I'd rather not buy one with winblows included.

I prefer the dedicated Android deck :)
[MTCB Android Head Units Q&A] idrak3:
Hi all my know what is type of modem 3g support by dvd car 4.2.2? Will Android support huawei K5150 LTE? Thanks
[MTCB Android Head Units Q&A] typos1:
If you read the thread from 3 weeks ago til today yourll find out that its a known problem with 4.4

---------- Post added at 11:50 AM ---------- Previous post was at 11:47 AM ----------

No idea, it needs colour changing LED hardware to work, if they changed the software and disabled the feature, but left the hardware the same, you could in theory get it working, if they changed the hardware then you cant.
[MTCB Android Head Units Q&A] MasterPrenium:
I got it to recovery ! After about 100 tries ...

This is what I was thinking, as list on our unit the beginning of the procedure is useless, as the reset button seems to break power supply.

Here is what worked :

1) Unit is running

2) Short press the reset and press POWER button at the same time for about 2.5 seconds

3) Release POWER button, wait 1 sec and short press again power button. This second press needs to be

before

the "kitkat booting screen" pop-up

4) Unit goes into recovery

5) Use short press for moving in menu and long press to confirm

Maybe the 2) isn't needed, and only the 3) is important

I tried it, it worked well until next reboot. After reboot, it made android to go on a bootloop :eek: (or maybe I freezed the wrong app). As I don't have front usb port and because it's hard to put my unit into recovery, I won't try again.

If you have time to test, do you know if it's possible to remove this app ?
[MTCB Android Head Units Q&A] zorantoma:
I uninstaled the musik.apk beacose every time i used SWC the aosp player started to play.Everithing is working normaly.
[MTCB Android Head Units Q&A] MasterPrenium:
How did you do this ? With titanium backup ?

Thanks ;)
[MTCB Android Head Units Q&A] zorantoma:
Yes :)
[MTCB Android Head Units Q&A] OlvrCA:
Mirror Link/AirPin/AirPlay/Miracast/Screen Mirroring

Hello,

Has anyone figure out how to mirror our Android phones onto the car unit?
[MTCB Android Head Units Q&A] c0py:
Yes you need to install airpin pro, the APK is in the image
[MTCB Android Head Units Q&A] MasterPrenium:
Hey guys, as my unit (KGL8401) is really really hard to put in recovery, does anyone know if it's possible to load a software before the boot process, and that this software will make the ability to go to recovery (I don't care if my unit take 5 seconds more to boot), just want to make recovery easier as I'm still searching which on of my software is making my device doing a bootloop (5 times recovery today T_T, like about 4 hours spent).

For example, on my smartphone (motorola droid 4) I'm using "SafeStrap" (based on TWRP by the way), it has lot a feature that I don't need here, but it has a menu that has the option "reboot to recovery" (this is what I need).

Thanks for any help.
[MTCB Android Head Units Q&A] OneCheekyDevil:
I'm guessing the hardware is there but the software side has been removed.

Would anybody running the current KGL firmware confirm that the setting option is there? (ELEMENT)

---------- Post added at 05:52 AM ---------- Previous post was at 05:47 AM ----------

Like TWRP Manager app?
[MTCB Android Head Units Q&A] ErAzOr2k:
Does anyone have the phenomenon, that if you start the engine of the car, the radio is shutting down for a short time, but immediately comes back? Any hints to prevent this? Because some Apps will crash, if this happpens.
[MTCB Android Head Units Q&A] Spiff@gmail:
kgl unit, blank screen

I have a KGL 7650 with kitkat 4.4.2 installed, at least it did. (KLD lightly rooted reparted v2). MCU 2.09 It was fine, but now it doesn't boot. I can only get bootloader mode. ive reflashed it several times with android tool 2.1 and 1.7. it connects and flashes successfully I get a brief animation on the HU screen . (firmware update animation) Afterwards the screen goes dark and i cant turn it on.

Any suggestions please help!! thanks, Spiff
[MTCB Android Head Units Q&A] ProfessorKnox:
Did you check in the factory settings menu whether there is a RGB-LED option, and if so, whether that option is ticked?
[MTCB Android Head Units Q&A] typos1:
"RGB-LED" appears in factory settings (as Prafessoer Knox said), on versions from all manufacturers, even ones that dont make units with colour changing LEDs.

You could try installing the "Element" app if you can find a copy, or select "RGB-LED" in factory settings and see if the app appears, it may do - on my unit the DVD app disappears if you de-select "DVD" in factory settings.
[MTCB Android Head Units Q&A] Spiff@gmail:
RGB Option

factory settings code =126

if you need to flash you can install an older image. android images are interchangeable between brands, MCU s aren't. Just flash the image (.4.2.2) But you will lose settings , root, etc. afterwards.

-Spiff
[MTCB Android Head Units Q&A] martinblanco20:
Someone know what is this app, its came with flyaudio galaxy 7 unit, are a similar app in our units??

Thank
[MTCB Android Head Units Q&A] MasterPrenium:
The look & feel and fuctions of the "Safestrap" are exactly the same as TWRP Manager, BUT as I see TWRP Manager is a software launched while android is fully booted like any other app, but Safestrap is started BEFORE the boot of android, just after the bootloader, it's really usefull as it's also provide "virtual" rom you can boot. The only thing I need is a menu that I could reach to make the device reboot to recovery and this menu needs to appear before the boot.

You say that the unit is turned on, and is briefly shutdown & restart when you are starting the engine ? If so it could be your battery is too weak, or maybe your car has a switched power supply that switch off while the engine is starting (it's commonly used for rear defroster, ect ...)

We have the same kind of app by default in our roms, but without this nice UI (it's just a black background with some informations like voltage of battery, state of doors, fuel level ect ...)
[MTCB Android Head Units Q&A] kuwacs:
Does 1.99 contain 4.4.2? I'm running 4.2.2, says my about section, but I may have flashed 1.86 instead? MCU is 1.86
[MTCB Android Head Units Q&A] typos1:
Looks like some sort of CAN Bus app.

---------- Post added at 11:07 PM ---------- Previous post was at 11:05 PM ----------

Well, we have a CAN Bus app, but it runs in the back ground, doesnt have a UI AFAIK, just things like heating and door open pop up if your car has it and your MCU has it working on your type of car.

---------- Post added at 11:12 PM ---------- Previous post was at 11:07 PM ----------

Er, I dont think you understand the way the updates work - you get 2 images, one for Android (update.img) and one for the MCU (MCU.image) you can flash them separately, any Android version from any manufacturer of these units can be flashed, any MCU number version works with any Android version, but MCU versions ARE NOT interchangeable between manufacturers, so if you have a KGL you could have any KGL MCU version number, but you CANNOT have an MCU from any other manufacturer - ONLY KGL MCUs on KGLs, ONLY KLD MCUs on KLDs, etc.
[MTCB Android Head Units Q&A] OlvrCA:
I know

I saw the app, i installed it, but my Galaxy Note 3 doesnt see the unit as a display option.
[MTCB Android Head Units Q&A] kuwacs:
No, no. I know how the updates work. I apologize, I might have explained poorly. I was posting while mobile.

What I'm saying is that I flashed with the 1.99 package, using the KGL1 (for BMW units) MCU image. When the Bluetooth was not working, I down-graded the MCU firmware to 1.86. The updates for my unit are in packages, and I wasn't sure if the KGL 1.99 package had the software update to 4.4.2 as well, or if you had assumed I was running 4.4.2 because of the bluetooth bugs. But for sure, I am on 4.2.2.

Does that make more sense? My bad! haha
[MTCB Android Head Units Q&A] lfelix70:
Bluetooth Fix? 4.4.2

Hello Guys,

is anybody working on fixing the bluetooth to work with Torque?
[MTCB Android Head Units Q&A] agentdr8:
I just resolved this on my car with push-button start. Since there's no key, to leave the car in ACC mode from running, I have to shift to neutral, then hit the button to kill the engine. But when I restart the car, it has to first kill ACC power momentarily, which would then start the shutdown process on my headunit. What I did was build a power-off delay using a 12V relay, NPN transistor, and a 1000uF capacitor. If you vary the capacitor size, you can control how long you want the 12V ACC line to stay energized (roughly 100uF per second). I can post a circuit diagram I found on the net if you'd like.

All update packages (zip) either contain both an update.img and an mcu.img, or just one or the other. The update.img relates to the Android OS system image, and the mcu.img is just for the MCU firmware. You can flash both at the same time, or each independently of the other (which is how people mix and match their MCU and system images). I don't believe KGL 4.4.2 was available until 2.08+.
[MTCB Android Head Units Q&A] Stank0:
I don't know about your unit but on mine I had to turn on something (sorry, I don't remember what it was) in the Factory menu in order for ELEMENT to show up.

Edit: Nevermind. I just noticed typos1 already anwered that.
[MTCB Android Head Units Q&A] ErAzOr2k:
oh yes please. a diagram would be nice :D
[MTCB Android Head Units Q&A] OneCheekyDevil:
I want to thank everybody that tried to help.

Unfortunately i cant change the colour of the LED lights :(

When i saw the Factory Settings option in the settings, i confused it with Factory Reset and steered clear of it. Biting the bullet i went in and discovered a whole new world :P After enabling the Element menu, i went in and tried to change my led colours - unfortunately, only red worked.

At least i now know they disabled it cause it wasn't hardware supported.

---------- Post added at 08:57 PM ---------- Previous post was at 08:53 PM ----------

Next project now -

I've already rooted the unit.

I want to flash TWRP, back the whole thing up to USB, and flash an updated android image.

Do i need to un-lock anything first

or can i just flash TWRP, back-up, and flash any android image (with corresponding MCU) ?
[MTCB Android Head Units Q&A] Sengir:
Hi,guys (and gals) I read the last 30 pages but I wasn't able to understand which is the latest official version for my Huifei KGL 8" 800px

Now I have onboard version 1.86,i think it's too early to upgrade to kitkat because i read so many negative feedback,so which version you suggest me to install?
[MTCB Android Head Units Q&A] edding7:
Hello, According to WM8731 chip, the internal mic could be connected directly without preamp stage: http://www.wolfsonmicro.com/documents/uploads/data_sheets/en/WM8731.pdf

If you see the circuit proposed by Wolfson, there are a decoupler capacitor (C2) and a Resistor (Rmic) to decrease the Gain,, acourding to the formula G = 50k/ (Rmic + 10k) . I will suppose that Resistor doesn't exist giving you a Gain of x5.

I didn't open yet my unit, but i wonder if there are some resistors to properly bias the electrect mic.

Acording to this post: http://xdaforums.com/showpost.php?p=55769511&postcount=3964 , [MENTION=290760]dnts[/MENTION] directly connect MIC-BIAS to MIC-IN, but in the other hand, the chip manufacturer says you need to bias the input with a Resistor network (default values are R1=680ohm and R2=47kOhm)

[MENTION=6041319]dsa8310[/MENTION], [MENTION=290760]dnts[/MENTION] will you any of this proposed components in the unit for mic conection?

Thank you in advance for your work
[MTCB Android Head Units Q&A] dnts:
Hi,

Well... my unit has been in and out of the car so many time... grrrrrrr....

Let me tell you where things are at the moment - The external mic is connected directly to the BT board. This gives me clear conversation with the hands free. The internal mic was a disaster for Android so I had to think of something. Connecting the external mic also to the CODEC was a no-go - too much noise was coupled back to the BT handsfree. Had to buffer it somehow so I got this:

http://www.aliexpress.com/item/Prea...curity-Surveillance-Camera-DVR/920204764.html

which is a mic with preamp that works @ 12V. I disconnected the internal mic and bias resistor and just used the rest to buffer the mic input before sending it to the CODEC. I used a ready made module since at $3.5 it's way easier than building on breadboard (and I'm patient with the slow parcel service).

Now my single external mic nicely feeds both BT and Android CODEC.

While at it I completely removed the DVD unit - have no use for that anyway and it's much easier - once removed - to gain access to almost anything inside just by removing the top panel (3 screws).

As for the WM8731 bias source - the BT module also supplies bias current for the mic and thus the bias resistor for the CODEC was not installed (or installed and not connected by a jumper) in my original unit. At first attempt, when I separated microphones, I had to install a bias resistor (or a short - I don't remember) to have some bias current for the internal mic.

Nir
[MTCB Android Head Units Q&A] idr3s:
deleted
[MTCB Android Head Units Q&A] airbrushbodyart48:
How to turn on USB debugging

How do you turn on USB debugging or developer options if you like .......Model number S07 Andriod version 4.2.2 Kernel version 3.0.36+........

Cant find how to do. I have already tried About phone, then tap on 'Build number' seven times. does not work for some strange reason
[MTCB Android Head Units Q&A] edding7:
Hello [MENTION=290760]dnts[/MENTION]

Thank you for your answer.

Let me understand, At the end you just use the opamp of this chinese module like a buffer. Copy the signal from one point (BT input) to other point (CODEC input) taking advantage of the high impedance of this chinese opamp input. Yeah, In terms of cost/effort is a very smart solution if you have the enough patience to wait it come from china.

I dont find a good way to put the external mic in my car because is convertible. My requirement is :

I need to use the internal mic for everything.

What do you think about the next implementation:?

- Keep the bias circuit of BT to drive the internal mic signal properly guided with shielded wire to the BT input.. (maybe changing the mic itself for other better). Then copy this signal with this aliexpress ready made chinese opamp buffer into the CODEC input. (quitting all the bias circuit as you did).

There will be the same solution as you but feeding all this invent from internal mic instead external jack.

If everything is ok, you can use your internal mic with proper quality for both Freehand and Android stuff.
[MTCB Android Head Units Q&A] MasterPrenium:
Guys, are you sure we cannot do anything purely software ?

Looking at the asound.conf, I saw some things we could look at, like this one :

I was speaking about this app :

For those how are having issue with radio reception quality on VW cars, you can buy THIS adapter, it's really working great (you use the dual fakra connector), which respect the 50 Ohm norm ;).
[MTCB Android Head Units Q&A] typos1:
What app is that, is it the MTC CAN Bus app ?

I ve not connected CAN Bus yet, my car has CAN Bus, but I bought a unit for a different car that doesnt have CAN Bus and have modified the front to fit my car. From what I can tell from pictures, the CAN Bus Tx and RX lines are not connected to the CAN Bus adapter, they just run straight from the headunit to the Tx Rx lines on the car, all the adapter does is give park brake, reverse, speed pulse, illumination etc from the CAN Bus network to the headunit. It appears as if the headunit directly connects with the CAN Bus itself using the MTC CAN Bus app. I intend to connect the Tx and Rx lines to my car and see what happens, though my car is not listed in the CAN Bus list in factory settings, so it might not work.
[MTCB Android Head Units Q&A] c0py:
I got it to work on my iPhone, however the steps below should be similar for your android device:

- first ensure WiFi is enabled on your head unit and connect your phone to this WiFi network

- then inside the airpin app you just need to enable the specific services you require such as airplay/miracast/mirring etc.. just tick them all to test.

- i dont know how to initiate mirroring from android phone, on iPhone I just load music or video and select airplay from the menu

Also you may want to enable the option of running Airpin as a service so it automatically launches as a service on boot up.
[MTCB Android Head Units Q&A] Tessa33a:
photos please 😀

Hello Nir, yes please,post the pictures of the process,and thanks very much