yashsingh1/xdaforums huggingface dataset:
[MTCB Android Head Units Q&A] george2350:
I did not say yes to your question based on looking at the chip alone. The first item link you provided was sold by AiRoad and they are the HuiFei's retail store on AliExpress. So you will get a KGL unit from them.

There is sure is a way to contact the sellers on AliExpress, I have done it and a lot of others have done it here. There is a contact seller option on the website and also their mobile application. Just ask for details including the about screen photo. By this time, they are familiar with it and will send you the two photographs showing the MCU version and the Android version.

Again - not sure if all the units with A9 rockchip 3066 are relevant to this thread - the first unit you asked about is definitely relevant.

Hope this helps.

---------- Post added at 09:58 AM ---------- Previous post was at 09:51 AM ----------

Looking at the about screen images in the above listing (even though it is in Russian or so I think), I do not think this is relevant to this discussion. But then again I could be wrong and some one could have copied the software and make all those changes and it might still be relevant. But my first guess is no, that is not a KGL/KLD/GS/RM version of the unit.
[MTCB Android Head Units Q&A] genius312:
Thank you very much for your help, this is a good thing to know !

I guess knowing the MCU, I will be able to know exactly which device I am getting so I will know all the bug I will face !

Because there is an external mic on this one, but I have read here that some have a probleme with these kind of unit, the external and internal mic are useless !

If I buy one of these, the most important thing that needs to work is the phone call, A2dp on bluetooth and Rear cam !

So if one of those are useless, I bought a garbage !
[MTCB Android Head Units Q&A] Cardroid_VW:
reverse cam not working with engine running

:confused:I have a weird problem.

I hooked up my reverse cam with a wireless receiver to my radio and it all worked well with the ignition key turned to on. But when i started my car and put it in reverse i get no video signal. There is power to the reverse cam receiver unit(the blue light on it lights up) and the rear unit gets its power from the back up light 12v. :(

My unit has canbus and is running on firmware and MCU version 2.03

I am stuck on this one and want to fix it before i tackle installing the front camera that i have laying around.
[MTCB Android Head Units Q&A] GastonJ:
Sounds like the microphone quality seems to be an issue across all units, for me when driving. I've tried the internal and external and both sound quite bad for bluetooth yet ok for Skype calls. I do wonder whether it's the wifi that might be giving it issues, since they're both on the same frequency. I'm in for a commute tomorrow and I'll let you know how it goes. For info I have a KG unit, details below

MCU MTCB-KGL5-V2.01

Model S07

4.2.2_20140818_15.14.44

Kernel 3.03.36+

Build RK30SDK-ENG-15.14.44

Has anyone else tried bluetooth voice call without wifi on and did it make any difference?

Cheers
[MTCB Android Head Units Q&A] agentdr8:
Glad it's of use. If you'd like to donate, there's a button

<--- over here. :)
[MTCB Android Head Units Q&A] NeoIsrafil:
Ooh...good question. Bluetooth and 802.11 both run on the 2.4ghz frequency range. You'd think that a device's components would be isolated so they can't interfere with eachother...but China.

I know that in my case the mic issues are not JUST the bluetooth, as it has a funny buzz when simply recording voice to the device...but it does lack the "rushing water sound" of bluetooth calls...so maybe. I'll try it today and try to post the results. You may be on to something.

Edit: nope...no change with the wifi off. However I did notice if I turn my car off entirely the noise mostly goes away...but thats not very useful. Not sure what's causing it. Could just be that big ole hemi engine's vibration being picked up by the mic (I put it in a magnum)
[MTCB Android Head Units Q&A] pakidermo5000:
Thanks a lot, I am gonna try and let you know.

cheers
[MTCB Android Head Units Q&A] Reptile-X:
Hi there, I think you got a VW since your nick name ends with that, the backup cam problem is VW specific with some cams, I have been trying different things like voltage stabilizer and different wiring, but after so many tries I found real problem and it was ground loop. In my case my backup cam is wired and worked good till I started the engine than the image start rolling really bad, sometimes I had same problem I lost the signal. Anyways read the start of my post below, there is your solution: http://xdaforums.com/showpost.php?p=54365316&postcount=1963

If that doesn't help you should consider to get a wired backup cam and use a video isolator.
[MTCB Android Head Units Q&A] agentdr8:
Yep, I noticed this too after installing KGL 2.03 on my GS. The preference can just remain for those on older system versions where the Loud setting gets reset on every boot.
[MTCB Android Head Units Q&A] Cardroid_VW:
Thanks a bunch i will be giving it a try. Although you seem to had some sort of image and mine just instantly is black with the no signal sign. But maybe it is because of the receiver. I have a wired cam laying around so i will try that to see if it changes some.
[MTCB Android Head Units Q&A] javlada:
I would also like to thank you a lot for your work on XposedMTC. There is now only one thing that bothers me. I already mentioned this before but I have some new quite strange findings. I set XposedMTC to cycle only through music player (PowerAmp) and radio using my steering wheel control.

What bothers me is the radio behavior when I start it. If I used XposedMTC to cycle through radio and music player, the next time I start my car, radio will start playing. No matter what was the last one chosen. I found out that whenever radio app is running (at least in background) the unit will turn on radio when it starts. To avoid it the only solution is to quit radio with back button and then switch to music. But even then the next time I switch my radio on, the music starts playing but I can't control it using my steering wheel keys (track skipping). I have to press the source switch button, which switches to radio, quit radio and then press source button again to switch to music. Then I can control PowerAmp.

Is there something you (I mean XposedMTC) or I can do about it? I would like to start my car radio with the last source used (radio or PowerAmp) and be immediately able to control it.

You could maybe at least close the radio app if switching to different source. Then you could save which music source was the last one used and on the next boot start controlling it. Can you do that? Or is it possible to somehow control the "restore last app" function of the device? That would be probably the best solution.

I publicly promise to send you a donation if you help me sort this out. Once again thanks a lot for the excellent work you did.
[MTCB Android Head Units Q&A] genius312:
Is there anybody here that bought a kgl unit and had no issue at all with phone calls ( external mic issue), backup cam, radio reception, sound quality, ect ?

I really want to but one but they all seams to have their problem. ..

Airoad from aliexpress.com ( http://m.aliexpress.com/item/2023206482.html ) says this is all working perfectly. . There is a ton a users buying it so if they had problem. .. the unit wouldn't have been a best seller. ..
[MTCB Android Head Units Q&A] Warlord711:
I have no need for external mic, because the build in one works perfect for me. Very good sound quality. I tried a back cam, but there are non KGL Unit issues why i cant use one atm. Radio reception is one of the worst i ever seen, thats true. I used a 35 € radio in a A3, that had similiar ****ty reception. I own a Golf MKV with 2 FAKRA antennas, i tried a cheap adapter, ****ty quality. I actually use a 50 € adapter, i have a slightly better reception but still non-stop interferences. I can compare to a RCD 300 radio, same way to/from work, same radio station, RCD is fine, KGL is ****.

I ordered a cheap DVB-T/DAB stick for 7 €, not received yet but it seems to work, because a few people use same stick and got perfect radio reception. (Source: German forum http://www.china-rns.com/erisin/8831-erisin-es9401a.html )

Sound quality for SD Card or DVD is good, not the best but ok.
[MTCB Android Head Units Q&A] genius312:
For the radio reception, can it be a problem only with VW ?

I know VW always had probleme with that radio reception !

I still have a VW Corrado and I remember it was a pain to modify correctly the Antenna plug to fit universal radio !
[MTCB Android Head Units Q&A] Shinare:
Half price?

I was looking at This Android Unit and noticed This one for half price. They look to be the same hardware. Anyone know if there is a way to get rid of the "Window 8" OS and put Android on there?

Should I be asking this in a different topic?
[MTCB Android Head Units Q&A] agentdr8:
It's definitely on my list of things to fix. I haven't tackled it yet, as I have yet to come up with a solid solution to determine what the current audio output is. You could have a dozen different apps all outputting sound at the same time, but to the headunit, it's all considered 1 source (av_channel=sys). So how to know which one to resume when the HU starts up? The stock MTCServer handles this by saving just the foreground app to the system prefs, and restores it when the HU boots. Problem is, if you have a different source playing in the background (say av_channel=fm) but have your nav app in the foreground, the only thing you see and hear when it starts up is your nav app.

I was thinking of hooking into the powerOff() method, determine what the current av_channel is at time of shutdown, and then determine based on the running task list which app(s) could possibly be sending output at that time, and save that off as the starting source when it boots.

---------- Post added at 08:32 AM ---------- Previous post was at 08:25 AM ----------

The hardware on the outside might look the same, but the insides are probably different.

Even if it's similar hardware, with Win8 on there, it might not have the same type of recovery/bootloader, so I have no clue how you would get the MCU and android system image onto it.
[MTCB Android Head Units Q&A] idr3s:
Tried out xposedmtc's update. Works like a charm. I've got all the issues I want sorted using this.. For me, the app's complete. Thanks a lot! Great work =D
[MTCB Android Head Units Q&A] grumetecap:
I was searching in the thread but i didn't found it

Can i disconnect the reversing mode on the huifei?

Because i don´t have the reversing camera
[MTCB Android Head Units Q&A] parazit26:
What kind of USB receiver did you buy? Is this receiver working with the stock radio app? I guess you will need another app like wavesink.

---------- Post added at 09:51 PM ---------- Previous post was at 09:47 PM ----------

Hi man! did you get an info from your seller already?
[MTCB Android Head Units Q&A] GastonJ:
Update to Yesterdays Mic Post

I tested with the external microphone, that had been supplied with the stereo, today and wifi off. It's a massive improvement on what it was, however not as good as I'd hoped - so I'm told from the person driving the other car who I'd phoned. They were able to hear me ok, but that was more or less with the mic clipped on my shirt just under my collar. Nothing like as good as I'd hoped for. I'm comparing this to the previous mic I'd used which is the Mercedes one, built into the car (and my Mercedes stereo) - the mic sits above my head in the centre of the roof and was always clear, unless I was doing over 90mph (never on a public road of course). So I doubt I'm going to get the quality that I'd previously had, unless maybe I take the plunge and either try to wire in my standard mic or maybe get a Parrot one which has been mentioned earlier. At least I know it's not the bluetooth at fault, although Thursday I will try with wifi on as well just in case :)

Cheers
[MTCB Android Head Units Q&A] agentdr8:
For vehicles without canbus, it's as simple as not connecting the reverse wire. Not sure about those with canbus. If there is a reverse wire as part of the canbus adapter/connectors, then you could disable it there. If it's part of a signal sent over canbus, then the MCU would have to support disabling reverse sensing, which I don't think it does.
[MTCB Android Head Units Q&A] Skitals:
Yes you can. You just need to cut the wire coming from the canbus adapter to the headunit. I don't remember the color, but it should be indicated on the pinout diagram on your radio.
[MTCB Android Head Units Q&A] grumetecap:
Ok thanks,i will try,i thought it would be possible to disconnect from the menu,guess with the menu proximity sensors bumper same thing happen
[MTCB Android Head Units Q&A] staneb:
No answer yet, they have a national holiday in China so it might take a few days.
[MTCB Android Head Units Q&A] dcervi:
I think it's possible to disable the rear cam in settings. If I remember correctly, it's under the 'Driving Safety' settings.
[MTCB Android Head Units Q&A] epicuser07:
Hey everyone, I am glad I found this thread. I purchased a HU (MTCB-KLD 1.86)

1. Mic was horrible so I removed it and had to use an external

2. Fan was loud, replaced it

Now the issue I'd like to around is using Bluetooth Internet so I can tether from my phone without turning on WiFi.

Has anyone figured this out yet? I don't see any options to do this with this modded version of Android 4.2.2.
[MTCB Android Head Units Q&A] agentdr8:
I don't think the headunits can do BT tethering natively due to their stripped-down BT implementation. You might be able to use something like PdaNet.
[MTCB Android Head Units Q&A] epicuser07:
And this type of HU can't yet be root either, correct?
[MTCB Android Head Units Q&A] agentdr8:
You can root these. Instructions are on 1st post.
[MTCB Android Head Units Q&A] epicuser07:
Yes, that is where I saw "Klyde v 1.86 MTCB-KLD (soon)" I just wanted to make sure I read that correctly as it can't be rooted yet.
[MTCB Android Head Units Q&A] Reptile-X:
I am not sure what that text has to do with rooting but like agentdr8 said these devices can be rooted pretty easy actually no matter what version.

Just use Root Master:

http://xdaforums.com/showpost.php?p=55684866&postcount=3882
[MTCB Android Head Units Q&A] agentdr8:
I think that refers to the firmware for the KLD. All of these rk3066 headunits can be rooted using the same method as outlined.
[MTCB Android Head Units Q&A] Reptile-X:
I am trying to find a good 2x1 GPS speedometer widget, but I only found 2 working widgets and one of those has 3x1 widget and the other different widget sizes but it doesn’t look good on this resolution. To be honest there was nothing available on the market so I grabbed those 2 with APK downloader.

Does anyone know a good looking speedo widget for these units?

I use Ulysse Speedometer Pro as app but I want a widget. I can recommend Ulysse Speedometer if anyone needs a nice looking speedometer app:
[MTCB Android Head Units Q&A] javlada:
As a quick solution you could simply resume the last music application to which XposedMTC switched. Of course it is not a rock solid solution but it would work for me.

Also interesting is as I already mentioned that the unit restores on start radio even if it is not the foreground app at shutdown but it was used previously (is probably running in background).
[MTCB Android Head Units Q&A] staneb:
I tried with a different USB stick today and the back USB works. So it's probably a USB stick issue if it's not working.
[MTCB Android Head Units Q&A] javlada:
The device definitely doesn't have Windows 8. It says Windows 8 UI. Windows 8 only runs on multicore x86 CPUs and with at least 1 GB RAM. This is a slow ARM CPU, the OS is probably WinCE. It is just made to look like Win8. The HW is even too slow to run fluidly Android, not to mention the much more demanding Windows Phone/RT/8.

Don not get anything slower then a dualcore Cortex-A9 CPU a 1 GB RAM. Also look for something having at least Android 4.1.
[MTCB Android Head Units Q&A] harlequin69:
Great work and thank you for sharing. I can follow most of what you did there except for adding the jumper to the CODEC due to electret mic use, do you have any pics of this? also why did you choose to use both mics in the end? would it not be better to use the external mic for both BT and android?
[MTCB Android Head Units Q&A] typos1:
The first one is a variant of the AN21-U, there is a thread on here for it. The second is just Windows CE with a Win8 style GUI - ie both have completely different specs to the units in this thread. They both use generic Chinese head unit facias that literally hundreds of head units use, including the ones in this thread.

As I said before, try disconnecting the internal mic, this has worked for others.

Cant you use Nova launcher or a similar launcher that lets you resize widgets ?

---------- Post added at 10:53 AM ---------- Previous post was at 10:48 AM ----------

Interesting post, thanks.

Its been established already that to get decent mic performance you need an external mic and to dis-connect the internal mic, thanks to your post, we now know why, although its interesting you chose to keep the internal one.

I take it you only have a KGL model, not a KLD, RM or GS version, so your comments about the poor quality "of these units" only apply to KGL versions ?
[MTCB Android Head Units Q&A] dnts:
Mine is KGL. Badly made. Maybe other units are better made (and designed...). My guess is as good as anyone's.

It's not like other units do not suffer from similar issues, right?

Nir
[MTCB Android Head Units Q&A] epicuser07:
Thanks all the details! This explains a lot. While I just removed the internal mic and started using an external mic, my issue now is placement. Where in your car did you find best to put your mic?
[MTCB Android Head Units Q&A] 1-2-Hak:
This is really great info.

I know its a big ask but could you do a really simple step by step on this with images.

I would love to try this but hardware mods need to be explained step by step and to make sure everything is clear to reduce bricks.
[MTCB Android Head Units Q&A] epicuser07:
Yes, it does look like firmware is what is being referred to. What I was hoping was there was some improved firmware to fully use the BT stack..eg. Bluetooth Internet Tethering. However, it appears the best I can do now is just root until new firmware comes out?
[MTCB Android Head Units Q&A] dnts:
Well... I found the closest spot to my head - routed the mic via the overhead light so it just hangs above and to the side of my head. Way better than any other places since it picks more speech and less noise.

Nir
[MTCB Android Head Units Q&A] xrapidx:
Would it not be possible to use your cellphones microphone and route it to unit over blue-tooth? i.e. cellphones microphone for input, and headunit for output
[MTCB Android Head Units Q&A] parazit26:
that sounds great. Is it possible for you to make a step by step tutorial? That would be really helpful.
[MTCB Android Head Units Q&A] dnts:
I hope to find some time to do this...
[MTCB Android Head Units Q&A] harlequin69:
Thanks again for the pic and explanation, I would happily buy you a pint (I'm sure I'm not alone) for a step by step guide.
[MTCB Android Head Units Q&A] typos1:
If you read the thread (I know its long !) then not necessarily, none are perfect but the Klydes and Roadmasters seem to suffer from less faults and the software seems to be better, although they are still not perfect.

Putting the Klyde software on KGLs (but keeping the KGL MCU) has been reported to improve the sound quality for the mic. And the Klydes seem to have better mic performance than the KGLs, although still not the best. I m sure it was a Klyde unit that someone removed the internal mic and said that the quality was improved on the external mic after doing so.

There are pictures of the internals of a Klyde unit posted months back (in June I think).

---------- Post added at 02:12 PM ---------- Previous post was at 02:07 PM ----------

Thats where most car manufacturers put their mics for OEM equipment, its the best place.
[MTCB Android Head Units Q&A] grumetecap:
Three days and the problems with the huifei started,the right speaker have strange noises,sounds like electric sparks,with the music player

Maybe the speaker got broken with the power out which comes from the radio?
[MTCB Android Head Units Q&A] HaKyLON:
Huifei Problems

Hi all

2nd days with my Huifei and i got soooo many problems...

- He doesn't sync contacts with phone ...

- Google account is setup but cant see him on account list.

- Sound quality is below original VW quality.

- Radio reception is buggy. ( bad in app but seems ok when background ... )

- BT calls are Extremly bad ( saturate and mic is baaad ) (ext mix too)

- BT A2DP is making a background noise ..... ( shhhhhhhhhhhhh )

If anyone here know thoses probs and maybe can help me it will be very cool !

I'm avalaible for photos / PM / Emails

Sorry for my bad english.

Thanks in advance.
[MTCB Android Head Units Q&A] SkyBehind:
Anyone tried the 2.02 version for the GS? I saw it was just uploaded.
[MTCB Android Head Units Q&A] 1-2-Hak:
Not wanting to scare you on this one but thats what happened to my original one. The right speaker went dull and buzzing, crackling. got worse and worse (I think it is the amp dying) until one day the unit just wouldnt turn on.

Had to get a replacement main board :(
[MTCB Android Head Units Q&A] cadillackid:
does anyone know if there is a way to adjust the AM radio frequency increments?

I have the Huifei with 2.0+ load on it (stock from factory)..

my AM radio band tunes like 603,612,621 etc instead of 600,610,620. I couldnt find anything in the settings to change it. i went into factory mode and its set to USA..

I know most people dont use AM radio but I like it sometimes so trying to get it to work right..

so far everything else on the unit works (3 days installed).. other than the dimmer circuit doesnt like the dimmer lead in my car.. if my dash lights are turned all the way down, the display dims down nicely and correct.. if my dash lights are all the way up the unit dims slightly when the headlights are switched on.. if the dash lights dimmer is anywhere in between.. the Display flickers bright and dim constantly..

all of the backlights in my car are LED so maybe the car is feeding out a wierd non standard DC signal and in between brightnesses.. its no biggie to me as I always have the lights up all the way.. just a wierdness..

-Christopher
[MTCB Android Head Units Q&A] ptclabs:
remove the backup.apk app worked on a gs with kdl. Guessing it will work for others.
[MTCB Android Head Units Q&A] agentdr8:
Does that include a new MCU as well?

---------- Post added at 10:19 PM ---------- Previous post was at 10:17 PM ----------

That'll work for when the system is up, but will give you a black screen when it's still booting and the MCU is handling the reverse input.
[MTCB Android Head Units Q&A] Dream Reality Syndrome:
Is this a Klyde unit?

http://m.aliexpress.com/item/1948364463.html

I'd like to own an android head unit now! Although this is only a 1gig rather than a 1.6

Tappin da crack
[MTCB Android Head Units Q&A] SkyBehind:
Yes, new MCU. I've only played around with it a little bit, actually seemed a little slower and I could hear the speakers very slightly with the sound muted. The car had to be of to notice.

Before I was running 1.91 and the KGL 2.03 firmware

Also xposed, if I had the mode override, changing moves caused a reboot. Didn't look to see if my old swc stuck though. Illumination of the buttons still doesnt work. Like I said though, didn't play around with it for that long.
[MTCB Android Head Units Q&A] Gemok:
I've got a bit of a annoyance with my kgl. I think the speakers are wired wrong, in the amp section of settings if I move the dot to front right it comes out rear left, front left is front right etc. Similar effect if I use poweramp's left-right balance setting. Anyone know how to get the wires out of the block that goes into the unit? Or is it easier to do the end that plugs into the cars harness?