yashsingh1/xdaforums huggingface dataset:
[MTCB Android Head Units Q&A] aluver:
Yes. I have tried some android volume control apps just about a few weeks ago, when I installed usb audio drivers at first time.

And I have posted a personal message to KeiserSozeyFr, who gave us CarAudioService. That message was including an answer on your post.

Here it is

Hi! Big thanks for your application CarAudioService!

I am using it with Poweramp. And it works great!

Now I am going to make a great quality car audio installation with my Klyde HU.

To do this I am going to use only digital out through USB DAC to prevent any losses of a sound quality inside this HU.

And I have got a great success - I have found compatible *.ko modules for USB Audio (DAC) support to our HU kernel.

I can post more about it if you have any interest.

And now I am writting this to ask your help to make CarAudioService update for ability of volume control of poweramp or any other 3rd party mediaplayers.

Because main volume control of Android does not regulate the volume on USB Adio devices (DACs).

It can only be changed by PCM (or something like that) channel in ALSA mixer.

ALSA is by default in my KLD-1.98 firmware.

I have to find a mixer control to change a volume of any media app like poweramp and etc. and change that by simple command:

# alsa_amixer sset 'CONTROL_NAME' 'N'

where N will incremental calculated value depending from volume up or down button was pressed.

For now I tried to get a list of mixer controls, but got nothing:

root@android:/ # alsa_amixer -help

Usage: amixer <options> [command]

Available options:

-h,--help this help

-c,--card N select the card

-D,--device N select the device, default 'default'

-d,--debug debug mode

-n,--nocheck do not perform range checking

-v,--version print version of this program

-q,--quiet be quiet

-i,--inactive show also inactive controls

-a,--abstract L select abstraction level (none or basic)

-s,--stdin Read and execute commands from stdin sequentially

Available commands:

scontrols show all mixer simple controls

scontents show contents of all mixer simple controls (default command)

sset sID P set contents for one mixer simple control

sget sID get contents for one mixer simple control

controls show all controls for given card

contents show contents of all controls for given card

cset cID P set control contents for one control

cget cID get control contents for one control

root@android:/ # alsa_amixer controls

root@android:/ # alsa_amixer scontrols

root@android:/ # alsa_amixer -v

amixer version 1.0.23

Tried with parameters -c0 -D0 (card and device numbers for default sound device) too, but nothing.

May be you'll be more lucky...

So, can you help me with my idea? Thank you for your job you did already again.

PS: Did you try to make Folder/Albums navigating buttons?
[MTCB Android Head Units Q&A] Warlord711:
No. You got a new Canbus Hardware from Vendor/Seller ?
[MTCB Android Head Units Q&A] kwalsh24:
No I sourced it myself, as my seller kept telling me I didn't need it. So i made a new wiring harness to include the new canbus, kept the original untouched. Weird how some have the issue whwre the raxio doesnt stay on unless the key is fully on and some dont. Think it was a crap / not filly compatible unit
[MTCB Android Head Units Q&A] Warlord711:
I tried a mix like 2.03 System, 1.99 MCU / 1.77 MCU.

I tried 2.03 System with 1.99 MCU and 1.72 or 1.77 Kernel, not sure atm.

Canbus not working and i always got 3 button vol +/- track up/down so SWC is pretty useless now.
[MTCB Android Head Units Q&A] typos1:
Yes but there are KGL1, KGL2 etc versions now, have you tried the different versions ?
[MTCB Android Head Units Q&A] coyttl:
Ah, yeah, I was just referring to the connecting itself (ADB being able to talk to whatever USB handle it's lookin' for, to send commands to the device..).

I also wonder if it's something in the HU - ADB isn't hooked up to listen to a USB port in *it*, so that your attempt at connecting is being sent through the cable to the HU, but the ADB on the other side is not tuned in. (..So to speak. :D)
[MTCB Android Head Units Q&A] agentdr8:
Which dpi did you end up with for Sygic?
[MTCB Android Head Units Q&A] kwalsh24:
186, ill double check later, I think I also tweaked the system.ini file, maybe the two adjustments worked together, however I can verify that the dpi adjustment in app settings is working, as prior id do a trip route, it would do 3 alternate routes, then the 3rd wwould get covered up wwith the 'drag to edit' button, after a few dpi adjustments (starting at 146 increasing by 20) I managed to get it so the 3 alternative routes are fully displayed with no coverage.
[MTCB Android Head Units Q&A] markastor:
Hi!

I have a KGL unit, but sometimes (absolutely no logic when) there is no sound at all (programs are working but no sound output). Sometimes I have radio only, but no MP3, etc. and radio volume is constant (volume slider appears, but doesnt have any effect). I didn't find a solution how to restore it, but after a while, sound returns. Chinese supplier from aliexpress has 0 customer support (no answer to emails, etc.).

Anybody had this issue before?

If I install 2.02 rom with 1.86 MCU and 1.77 kernel, might it solves my problem? Could it be hardware error (I think not).

I have Ford Focus 2008, MCU 1.86 will be fine?

Thanks in advance, Mark
[MTCB Android Head Units Q&A] kwalsh24:
What version of sygic are you using? As it mamay differ from version to version, I'm on 13.4.1
[MTCB Android Head Units Q&A] agentdr8:
I can't recall at the moment. Will check next time I'm in my car. I want to say it's the 13.x, but it might be the 14.x series.
[MTCB Android Head Units Q&A] kwalsh24:
Hmm I know the 14 series only does full screen, and I do recall you mentioning something about trying to program it so it would run in a window, so you could be on 14, is it the white interface or black ? White is 14 black is 13. I wonder if an edit to the system.ini would allow window mode for 14? As I seen that option is listed in the system.ini for 13.xx series
[MTCB Android Head Units Q&A] parazit26:
got my mic today and tried it out. my gf said, she hears me almost as clear as i am talking through a phone mic. Thank you very much Reptile, i am happy that at least something works on this head unit lol
[MTCB Android Head Units Q&A] _arecki_:
When I read this thread I wonder if there is at least one HU working as it should. 100% working directly from factory.

Everyone is claiming for something.

I suppose that people that have no problems will not look for this thread but is there anybody fully pleased?

Are all those HUs so low quality or in very begining of development and each of them has some drawbacks?
[MTCB Android Head Units Q&A] SkyBehind:
Did you have to wire the mic or did it come with an external mic jack?
[MTCB Android Head Units Q&A] Reptile-X:
Hi ProfessorKno, like I promised to you I took a video with working TV-Box, today I had some time and installed the TV box together with the 3G modem, did show some other stuff on the video like 3G USB modem and back up cam.

I am still on FW 1.70, in short time going to update the HU, still getting confused which FW and MCU to take so need to do more reading.

Here is the video showing the TV-box, backup cam and the HuaWei E1750 3G modem, while editing the movie I removed the part with the modem but you can see the internet reception icon:

https://www.youtube.com/watch?v=Q4JTOKyUb8Q

Finally got reception with the radio, I ordered a dual FAKRA adaptor from Aliexpress 5 weeks ago, since it took so long, I was totally forgotten about this LOL. It was delivered yesterday so it was just right on time install with other things together, I am happy to have some radio after 5 months with this unit.

I am glad it worked, I was 100% sure about it but you never know with this kind a things LOL
[MTCB Android Head Units Q&A] agentdr8:
I'm on 14.3.1. I think they removed the windowed option from the code, so I'll probably try changing the app theme to one of the Holo.Dark ones that doesn't hide the statusbar using xposed.
[MTCB Android Head Units Q&A] blankers:
That's good to hear. Where abouts in the car did you mount it ?

Can I also ask where you got it ? and which model it is...there appears to be 2 or 3 different ones. On ebay I can see the ck-3000, ck-3100 and the ck-3300...They all look the same..............
[MTCB Android Head Units Q&A] Reptile-X:
I think all models you mentioned use same mic, so it shouldn't matter which one you get, as long its a Parrot mic ;)
[MTCB Android Head Units Q&A] typos1:
I m confused as to how this worked - Connects2 sell CAN Bus interface boxes and when buying one you slect the aftermarket headunit you have and your vehicle, you then get sent a box that "speaks" the language of your aftermarket headunit and the language of your car and translates from one to the other allowing communication.

I dont understand how your CAN Bus interface works because the "languages" these headunits speak are either Android or the MCU code and I dont think anyone sells them (other than the manufacturers of these headunits) that speak Android or MCU.

Its an Android tv box (which is really a modified tablet, a bit like these stereos are) that I was trying to connect to, not had any probs connecting to anything else, was just wondering whether what arecki said about male to male USB might be the problem. It was only when I put the box into recovery that I could find it on my pc, or at least followed the procedure to put it into recovery - because it wont boot and I get no picture, there is no visible way to see that it is in recovery, the only way to tell is that device and product ids become visible after I hold reset and power it up. I posted elsewhere on XDA for help (no one has offered any), its just that what arecki said yesterday seemed relevant to my problem.

I think some are happy and it seems more Klyde customers are than KGL/HuiFei ones, but as you say, it could just be a case of the happy ones who have perfectly working headunits, dont bother to post because everything is working.

(ps, please comment on my reply to your post yesterday about male to male USB)

Is it possible to change the colour of the on screen menus on your DVB-T box, Reptile-X ?
[MTCB Android Head Units Q&A] kwalsh24:
Ah that sucks, can't say i used 14 much, just starting to get use to 13, any real advantages ?
[MTCB Android Head Units Q&A] agentdr8:
So on 14.3.1, if I leave dpi alone and set Fullscreen to Prevent, everything shows up fine and I get the statusbar. No need to work on a module myself :D
[MTCB Android Head Units Q&A] kwalsh24:
Hmmmm interesting, you doing that in app setting ? May have to try the upgrade and see
[MTCB Android Head Units Q&A] Reptile-X:
Yes it is but only 3 colors are available, green, yellow and blue, I would love to have red to be honest.

In my opinion the green and yellow are butt ugly by the way :D
[MTCB Android Head Units Q&A] agentdr8:
Yep. Just scrolled through the different settings, saw that one and gave it a try.
[MTCB Android Head Units Q&A] kwalsh24:
Oh awesome, thanks for the info, think I'll try the new release and see what the difference is
[MTCB Android Head Units Q&A] typos1:
Typical, I want red as well !

Have to try and hack the firmware and change it !
[MTCB Android Head Units Q&A] Reptile-X:
I am happy with my unit to be honest, everything works like I wanted. The issue with the radio antenna I got was because of the VW's FAKRA system or me getting wrong adaptors every time. And can-bus not working to the car is not a big problem for me and it is getting fixed meanwhile.

It is not like everyone is happy with their OEM units, I would never choose famous RNS 510 VW unit over this unit in my car, possibilities are a lot thanks to Android in these HU’s.

I am one happy KGL customer :D

---------- Post added at 11:04 PM ---------- Previous post was at 11:01 PM ----------

I think the TV-Box has it's own FW, but I am not sure if the colors are set in the app or the TV-Box itself, red would be nice but not a must for me :)
[MTCB Android Head Units Q&A] typos1:
I meant hack the TV box firmware, as I too think the colours are set in the tv box, although the touchscreen bits (the icons on the top, bottom and sides of the screen) might be in the TVapp on the headunit as the TV box is a modified version of a widely used DVB-T interface made to work with touchscreens.
[MTCB Android Head Units Q&A] Boodro1:
Sometimes I will loose audio after I hang up a phone call. My aftermarket sub will work but not the stock speakers. I don't know if it's the GS or the adapter I have to use the stock amplifier/SWC interface.
[MTCB Android Head Units Q&A] ptclabs:
Extracting

Has anyone been successful at extracting the mcu files at all?

If so how?

Are the nandroid back ups still encrypted?

Can you pull the mcu image back through this thing with twrp?

I need a way to get into the mcu.img to scramble the buttons around
[MTCB Android Head Units Q&A] parazit26:
It came wired. Just plugged it in the rear female jack and thats it.

---------- Post added at 09:52 AM ---------- Previous post was at 09:41 AM ----------

I got it from Amazon its this model http://www.amazon.de/gp/product/B001OZYBWI/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

As far as i know they, parrot has two different mics. The double with a 2.5mm jack and the single one with a 3.5mm jack. The 3.5mm is the one you need.
[MTCB Android Head Units Q&A] xrapidx:
Can someone with near perfect radio reception please upload a picture of what there radio antenna plug looks like?
[MTCB Android Head Units Q&A] blankers:
[QUOTE

I got it from Amazon its this model http://www.amazon.de/gp/product/B001OZYBWI/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

As far as i know they, parrot has two different mics. The double with a 2.5mm jack and the single one with a 3.5mm jack. The 3.5mm is the one you need.[/QUOTE]

Ok. Thanks for that. I will get one on order.

Where did you mount the mic ? I wonder if that makes a big difference to the quality....
[MTCB Android Head Units Q&A] xrapidx:
Anyone know somewhere that'll ship the Parrot microphone to Africa?
[MTCB Android Head Units Q&A] sprfly:
Ebay?
[MTCB Android Head Units Q&A] Warlord711:
Not sure if you can do anything with mcu.img

For my understanding, the mcu.img updates a flash chip and those code usualy is written in pure assembler.

Thats just my idea of the mcu.img content, maybe someone can enlighten us ?

---------- Post added at 12:48 PM ---------- Previous post was at 12:46 PM ----------

Can you give further details please ?
[MTCB Android Head Units Q&A] typos1:
Months and months ago I sure someone (maybe Dark Alex?) did extract the MCU files for a few units from different manufacturers and found that the code was very very similar.

EDIT: did a thread search and it was post #1671 (darkleo200, not Dark Alex, lol) :

I m confused as to how this worked - Connects2 sell CAN Bus interface boxes and when buying one you slect the aftermarket headunit you have and your vehicle, you then get sent a box that "speaks" the language of your aftermarket headunit and the language of your car and translates from one to the other allowing communication.

I dont understand how your CAN Bus interface works because the "languages" these headunits speak are either Android or the MCU code and I dont think anyone sells them (other than the manufacturers of these headunits) that speak Android or MCU.
[MTCB Android Head Units Q&A] xrapidx:
Can't find one willing to ship here :(
[MTCB Android Head Units Q&A] heimleiter:
Hi,

i have bought this Radio from Pumkin at eBay for Ford Focus MK2 with Canbus-Adapter and need some help... ;)

My first Problem is that the Buttons are only illuminated at the start for 2-3 seconds and then never again. I have read very much in this thread an i think it is a Software Problem but i don´t know which configuration file fits for my Radio.

The second Problem is that the Radio have no Buttons for Forward/backward so i cant use the car Service app for using my steering wheel control with other apps than the stock ones. I can´t bind them in the Settings too. The Buttons at the steering wheel are functionally but i´m not able to Change the bindings. In the factory Settings menu is "no canbus" choosen an if i Change it to Focus then they will not work. Is there any way to use them for spotify and so on?

The last Question is if someone can tell me who the manufactor is and where i can download updates?

thank you very much and sorry for my bad english. :eek: ;)
[MTCB Android Head Units Q&A] ptclabs:
Well that sucks. Unless IDA has came a long way since I was in school, we are sorta screwed on changing the buttons around easily then. If I remember right it just does sections of code with alot of "help".

I guess we will have to try a intercept and override way then if it hits the android first. Which I do not even know if that is the case, but it seems the most likely.

Still interested why forward and back do not work like every other button on this thing. Wish the car service app developer would chime in and let us know his knowledge.

It is like I thought though, the source is up for sale to whatever manufacture can but it. Wonder who wrote it, and how to find them.
[MTCB Android Head Units Q&A] typos1:
Not sure I follow you - what sucks about the MCU code ?

And youre talking about the "source" for the MCU/Android parts or the CarService app ?
[MTCB Android Head Units Q&A] ptclabs:
Looks like a gs unit by the picture. About 10 pages back I have posted a link the to the 1.91 version try that.
[MTCB Android Head Units Q&A] typos1:
There is a section at the beginning of the thread that tells you how to identify your unit, did you not check there first ? !! Its probably a KGL, there is also a section there about the firmware and where to download it.

---------- Post added at 02:06 PM ---------- Previous post was at 02:05 PM ----------

No, I think its a KGL/HuiFei - Pumpkin sell KGL/HuiFeis, have done for months, they were one of the first sellers.

If heimleiter follows the simple guide linked to on the first page, he will find out by going into settings/about device !! :)
[MTCB Android Head Units Q&A] ptclabs:
I have went through and found all of the front button control keys that get called to the irkey that makes it way back to the MCU. The forward back buttons or the tuning knob seem to work differently. Whoever made the car service app understands how the forward and back work so I was interested to learn that.

Yeah I think we would need the source code to change the mapping through the mcu prom. That would be the easiest way I could think of. There has to be a simple list in there somewhere that has a designation and a function that would have been easily changed. There are like 20 or so functions I found. I can find no trace of them in the android though. So I figured it was pushed back to the mcu.

Someone with alot more skill than me could more than likely handle this problem though.
[MTCB Android Head Units Q&A] typos1:
Ah, I see.

Not sure about who wrote the CarService app, (think it might be Dark Alex), but its easy enough to find out - just use the thread search function and go to one of the first mentions of "CarService", then pm him.
[MTCB Android Head Units Q&A] heimleiter:
yes i have checked it first, an the backside of my unit is very similar to the Klyde one in the pdf, but my Radio-Tuner is a TEF6606/TEF6... and the Klyde should be an TDA7706 and my launcher is optical an other one.

In my Settings stands MCU-Version = MTCB-GS-V1.91 (Jul 23 2014 13:45:10) sounds like a GS unit right?

Model = S07 ; Android-Version = 4.2.2_20140724 ; Kernel-Version = 3.0.36+ ; Build-Number = rk30sdk-eng4.2.2 20140724. 11:18:04

When i Flash a Firmware from a unit with an other button layout on the device happens what?

thank you very much
[MTCB Android Head Units Q&A] _arecki_:
Have you seen my response:

http://xdaforums.com/showpost.php?p=55357576&postcount=3393

I am afrraid that I can't tell much more.

As I said, the male-to-male connection is not good way to connect. Maybe your device does not support ADB connection at all, or maybe just not with this port. There cen be some internal service port for this purpose. Hard to tell. Do not know this device.
[MTCB Android Head Units Q&A] SkyBehind:
I will. I'm in the US, I'm sure I could buy one and then ship it there. You only psy cost plus shipping, I don't mind helping someone out. You can PM me if you want help getting one.

---------- Post added at 10:08 AM ---------- Previous post was at 10:03 AM ----------

I have 1.91 on a GS and my buttons do the same... Only 3 second of illumination or they will stay on for a fee if I go to settings to change the color.

---------- Post added at 10:11 AM ---------- Previous post was at 10:08 AM ----------

FYI... I ordered from pumpkin and have a GS unit. You're right, it may be hard to read all 300+ pages, but not the first page???
[MTCB Android Head Units Q&A] typos1:
Ah, yes, if it says "GS" in the MCU about screen that is what it is, sorry ptclabs, you were right.

Its obvious now that you should follow ptclabs' advice re updating.

Lol, yes. Interesting that pumpkin are now selling the GS versions as well.

Ah yes, thanks, I ve tried both ports and bot are the same, I thnk all Android devices are compatible with ADB, I ll try ADB over LAN and see if that works, if it does not I will assume its a problem with the device.
[MTCB Android Head Units Q&A] heimleiter:
I had read the first page many times before i made the post, but there is no GS unit in the PDF so i asked here to get sure.

My Unit is also up to date and i can´t do anything to solve the Problems now right?

:good:
[MTCB Android Head Units Q&A] typos1:
Ok, that is also a fair point, the GS versions are relatively new, we werent sure what their spec was exactly, as they seemed to be a bit of a mix of all types, I ll contact pakidermo and get hime to add them to the pdf and guide.