yashsingh1/xdaforums huggingface dataset:
[MTCB Android Head Units Q&A] typos1:
Not sure which actual unit that is - it has the HuiFei launchers, but the spec lists the GPS chip as a SIRF like the Klyde unit and the back doesnt look like either a HuiFei, Klyde or Roadmaster.

Thats a HuiFei unit you have. Which firmware did you use to flash it ?

They have different MCUs made by different companies (HuiFei has a Microntec MCU (source~: you, lol) Roadmaster has an NXP Semiconductors MCU (according to J0sh_FG), no info on the Klyde's) with software made by each particular manufacturer (HuiFei/KGL "KGL", Klyde - "KLD" and Roadmaster "RM").

Someone a few posts back bricked their unit by putting an entire Roadmaster update on it (post #1339/1342), although by post #1624 he seems to have sorted it. Some one else put just the HuiFei Android update onto their Klyde and it seemed to pretty much work apart from the buttons on the front (posts #1521, #1532, #1593). I think this confirms that MCUs are not compatible but that the Android update is mostly compatible.

In theory, as long as someone makes a note of the button mapping, we could make some sort of custom update using the best parts of all 3 versions.

As for the MCUs, we need more research, for instance does anyone know what "language" theyre programmed in ?
[MTCB Android Head Units Q&A] 1-2-Hak:
KeiserSozeyFr is very good in reverse engineering this unit - Maybe he would do it for a beer ;)

---------- Post added at 11:05 AM ---------- Previous post was at 11:01 AM ----------

All might not be lost. There is a way to reset the nand on the rk3066 chips to do a mask rom reset. I couldnt do it with the Huifei units as the module plugs into a slot that stops you getting access to these pins easily but on yours you might be able to do it.

Its kind of a last resort but it has worked for me on a rk3188 tv unit when I bricked it - so I know it does work.

Basically as per the instructions you need to short the nand pins 8 and 9 while turning the unit on - with the usb pluggedinto a pc. The PC will detect and install (or prompt to install) the maskrom device - which will talk to the rockchip bootloader software.

If you want to try this the details are here http://www.techknow.me/forum/index.php?topic=5354.0

** I was thinking as well - try putting a usb cable from you unit into a pc and then power on the unit (both red and orange wires) while holding the power button and see if your pc detects anything.
[MTCB Android Head Units Q&A] blankers:
If you go about half way into the video you will hear it's the radio app.
[MTCB Android Head Units Q&A] sunjan:
Kai Ge Le on Ebay

Dana from Kai Ge Le (KGL) got back to me.

They prefer do chat over Skype to answer all the questions in real time. Dana's ID is "danatong161", while Keylo has "keylo1688".

Good communication, sorted out all the optional extras (front DVR, reverse camera, DVB-T, fake dummy cover etc).

The way is works is that you select the head unit from their Ebay shop, hook up with Dana to agree on shipping options and extras, then she will send an ebay invoice with the shipping cost adjusted to cover the add-ons. They also offer deals outside Ebay/Paypal at 13% reduced fee, but for me the buyer protection was worth the extra cost.

Just like Erisin, they are considering opening a warehouse in the UK or Germany, to offer shipping within the EU without incurring customs. This is just a long term idea for now, so don't hold your breath.
[MTCB Android Head Units Q&A] Macces:
Thanks, will try to get to the maskrom later this day. Opened the device yesterday but found only a big heatsink on a extra board plugged into a slot and the optical drive, attached to the same "mainboard".

Will also try to power up the device with a pc connected to the usb port. Yesterday the pc doesn't recognize anything, but I didn't disconnect the device from power before.
[MTCB Android Head Units Q&A] h_kaufman:
Thanks for the help, i did as you said and that got igo working... Until i try to get gps conneted and start navigating, as soon as i get gps conneted it shuts down. Could someone please give me a link to à working link to download the same igo as i hade on My sd card or maybe an copy of the original sd card i would be really thankfull.
[MTCB Android Head Units Q&A] Skitals:
Is there any guide on deciphering which units are HuiFei vs other builds? I'm looking for one for my 2011 VW GTI and there are a million different variations.

I believe the best bet I've found is this one: Ebay item id 251453910925

Can anyone look at that and tell me what they think? The software looks right, but I haven't seen any others with that button configuration. But it's one of the only ones for Volkswagen I've found that has the front USB port which I understand is needed to boot into download mode.
[MTCB Android Head Units Q&A] kwalsh24:
Sorry, had the girlfriend sleeping beside me so I couldnt fully listen to the video lol.
[MTCB Android Head Units Q&A] agentdr8:
I use my phone's wifi hotspot, so I don't notice any connection drops in Sygic. Maybe it's the dongle? I'd try streaming Youtube or Pandora or something and see if it happens there too.

Yeah, I get this odd issue too. I believe it's the way Sygic handles reducing the other audio streams in android; if I use it with the Radio, it seems to lower the radio stream just fine, and I don't get the odd fluctuation in volume after TTS is done. That situation is most likely handled by the radio app, via MCU commands for av_channel mixing.
[MTCB Android Head Units Q&A] dark alex:
It also happens. I'm listening to Google Music (Streaming) and get the drops. sometimes it lasts ultimatively long to get a connection again... seems to depent on the signal qality. My assumption is it does not connect to EDGE and HSDPA Networks at all. Only real 3G...

The Dogle works just fine and with its windows driver even on EDGE and would be able to use LTE...

Anyone can confirm a dongle working with EDGE and HSDPA? If yes which one?
[MTCB Android Head Units Q&A] vaughany2:
Trying to upgrade to v1.86 through recovery and getting these errors. Any advice? Thanks.
[MTCB Android Head Units Q&A] blankers:
No problem....

Is the girlfriend not interested in your headunit ? Might be time for a new girlkfriend :laugh::laugh:
[MTCB Android Head Units Q&A] kwalsh24:
Hahaha oh she is, but she's sick and had to work today hahaha. It was 6am my time when I was viewing and she was snoring logs haha.

She much prefers this unit over tthe last one I had, in which I almost punched the screen in on haha.
[MTCB Android Head Units Q&A] blankers:
Oh..that's ok then....tell her she can stay...
[MTCB Android Head Units Q&A] kwalsh24:
For now.... right ? Lol
[MTCB Android Head Units Q&A] KeiserSozeyFr:
Bluetooth and external mic

I found a bug with the microphone :

I connected the orginal microphone of my car on the back panel connector in order to have a better quality sound.

It works well with voice recognition (google navigation etc...). I tried to record my voice and sound is ok.

But when I make a call using bluetooth, people don't hear me. No sound at all.

If I disconnect the back panel connector, It works.

The microphone of the unit is terrible, sound is low and bad quality, I really want to use the one from my car.

Any one have the same problem ?

I still use 1.86 firmware
[MTCB Android Head Units Q&A] dark alex:
Another Bug...

I am using an audison DSP and using High-Level inputs. But I do get nearly no bass signal (I mean nerly no tone below 100Hz) Is there any (adjustable) filter known for high level ouputs?
[MTCB Android Head Units Q&A] agentdr8:
I remember reading (either this thread or the AN21) that the built-in mic and the external mic inputs were wired together, causing an issue when they were both "in-use". I should be receiving my external mic tomorrow, so I can do some testing to see if this is the case, and whether or not the internal mic needs to be removed from the circuit in order for the external to work properly.
[MTCB Android Head Units Q&A] halloj:
I've the can-bus box, but I don't have this application. Someone who can point where to find it. Or maybe upload it here?

Thanks
[MTCB Android Head Units Q&A] agoksu:
I read somewhere in the forum that front mini USB port can also be used for accessing the rockchip bootloader, but

I was unable to access it with the suggested procedure. Can it be used to access the bootloader? thanks.
[MTCB Android Head Units Q&A] gmanor77:
Hi,

I bought this extension cable (it says it is mic cable):

http://www.ebay.com/itm/Audio-extension-cable-stereo-3-5mm-Male-to-Female-1-5m-5ft-Headphone-Speaker-Mic-/111432246481?pt=LH_DefaultDomain_0&hash=item19f1e124d1

When I revealed the cable I had 3 different cables - white, red, yellow. It has no shield like in the pictures I saw in this thread.

Where can I find the correct cable with female 3.5mm socket?

Thanks.
[MTCB Android Head Units Q&A] Obsidian Black:
HuiFei - 2 DIN Pure Android 4.2.2/4.4.2/4.4.4 RK3066/RK3188 CarStereo Radio Head Unit

Hi all, I just installed my new headunit from Auto Pumpkin sku GS-C0219, not sure what the actual model is.

I have a couple little issues with it and Auto Pumpkin have been the worst to deal with but I will not get into that. The issue i have is when I plug a usb stick into the usb socket that connects at the back it will not read the music and crashes the music player. If I plug it into the mini USB slot in the front it sees all the music but I don't like the look of the usb stick just dangling around.

The other issue I am having is after I have installed PowerAmp to try and fix above issue is that is only see's a handful of my music which is all the same format mp3's. Is there a better option?

Cheers
[MTCB Android Head Units Q&A] halloj:
No don't use a cable female. This is what you need. http://www.ebay.co.uk/itm/Chassis-Mount-3-5mm-Stereo-Jack-Socket-20-0133-5-pcs-OM563x5-/390662009451

Attached to one of the empty holes on the back of the unit. It's a stereo socket but it doesn't matter. You're only using the tip and the ground.

Go to a car-radio shop and ask them for a piece of shielded cable. Some donut's or something similar usually work as payment.
[MTCB Android Head Units Q&A] jperezch:
According to your commet at message #16574 you managed to root your unit, so now you are going to be prompted to grant root access every time an app needs it.

The weird thing is that this notification asking for root access is generated by some superuser app, but yo say you haven't installed any. As far as I know it doesn't come pre-installed into original JY firmware. Some time ago I modified the original JY image to inject superuser files, and I saw there was some kind of 'su' binaries at xbin folder but no superuser.apk anywhere.
[MTCB Android Head Units Q&A] jperezch:
I have a JY unit and WiFi works perfect. It comes with an external antenna.

I haven't experienced any problem with USB either.
[MTCB Android Head Units Q&A] james.dogtrainer:
Internal Pics or RK3188 with cables hooked up wanted

I just bought my first Android Car radio an EONON (RK3188), so I did a stupid move during my install while trying to shoehorn it into my old Tundra Truck. I removed the face plate looking for an extra .5mm and when the last screw was removed the screen which was unexpectedly heavy dropped off and pulled the flat cables right out. I had tried a few times to get them reseated and finally ended up burning one of the wires in the cable and one of the cables had a pretty good kink in it. When I looked at it under magnification to count the pins I could see where when it pulled out some of the pins on the cable were skewed to on side from when it ripped out. I have ordered some new 40pin cables from Hong Kong but I would really appreciate a picture of the internal cables with orientation for the same model or any other advice other than don't open it and do something stupid. Like do the just lay flat or do they twist etc.

Thanks.

[IMG="Screen unit Face"]https://goo.gl/photos/bsX8c41VDWUGPp9v9[/IMG]

[IMG="Internal pic"]https://goo.gl/photos/W3kJF6kWoQiuWa3A7[/IMG]
[MTCB Android Head Units Q&A] antvic:
To Malaysk:

I just installed your magnificent CD-ROM for 800 x 480 RK3066, last July. I have just a few hours using it and I have no words to describe it.

I can imagine the amount of time you have spent in building it, and want to give you my most sincere thank you for it.

It took me a bit to find the word "language" in Russian, but when I put it in Spanish, no problem.

There are some things that I have not yet tried and others that I don't know what are. Surely you'll ask for them later.

I can just tell you again: THANK YOU! And if one day visits Spain will be happy to invite you to a good paella with abundant beer.
[MTCB Android Head Units Q&A] antvic:
I can tell you that I have a micro USB adapter to female USB OTG and I connect pendrive data, videos or music and it works for me. Images step you
[MTCB Android Head Units Q&A] antvic:
I have tried it and I was not possible. Even by removing the cable and investing data wires.
[MTCB Android Head Units Q&A] fbauto1:
thanks!!!!! :good:
[MTCB Android Head Units Q&A] Blackwaterification:
My solution will be made once I receive my new cables so I can power my USB hub. I am putting an USB hub into my drawer and will simply unplug the 3G usb every time I make a stop. Unfortunately I have one of those drawers with cooling, so I will cover the hole around the cable with some silicone to keep it as isolated as possible. I might also just use the small space below my radio in the center console instead which should fit the USB hub just fine. If WiFi had worked this wouldn't be a problem for me. I just wish I had a JY unit.

Is there a way to make holding the back button force stop an application like on the one plus one? I could use this for closing applications.
[MTCB Android Head Units Q&A] gmanor77:
Will a coax cable do the work?
[MTCB Android Head Units Q&A] Quito13:
Dash cam for 4.4.4 unit

Can someone tell me what dash cam I can use for my 4.4.4 ford focus unit?

On the back of the unit I have a usb connection for a cam.

Thanks
[MTCB Android Head Units Q&A] agoksu:
I have the same mini usb OTG cable as in the pictures . It works for charging the phone but not for a flash drive. thanks.
[MTCB Android Head Units Q&A] slackmartian:
I use this one with good results: http://www.ebay.com/itm/171814802116?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT
[MTCB Android Head Units Q&A] Quito13:
Thanks!

Does autostartrecording work?
[MTCB Android Head Units Q&A] halloj:
Use a regular audio cable. Keep it simple.

You're making it too complicated.
[MTCB Android Head Units Q&A] shadowfoxmi:
I have the same problem; although not all the time but about 50% of the time the wifi is turned up on boot up and I have to manually turn it on. It would be nice if someone has any suggestions to fix this.
[MTCB Android Head Units Q&A] tylerwatt12:
can anyone tell me if this is a huifei unit?

It has a larger screen, no physical buttons or knobs which is different than most

Is there any reason I shouldn't buy it?

http://www.ebay.com/itm/New10-2-And...ereo-Player-/271912875700?hash=item3f4f4536b4

Also, would I need to make my own wiring harness?
[MTCB Android Head Units Q&A] slackmartian:
I have not tried autorecord, honestly I could not find that many options in the car record app, nothing regarding autorecord either. But recording works well, maybe a little lag occurring but that could be just my SD card class is too low.

Think I'll try Daily Roads app or similar... Autorecord sounds like a nice feature :)
[MTCB Android Head Units Q&A] coworker23:
My USB drive works on all USB ports, although if I have more than 1 USB drive plugged into the back (whether they are plugged into the OTG hub or they are plugged into both USB/3G ports) it only "sees" one of the drives. It will literally umount the other USB stick, if I plug a secondary stick in while one is already plugged in. I have tried NTFS, Fat32, and exFat with Paragon exFAT, NTFS, OTG USB Helper, and also checked the backend to see if it would recognize 1 device, i.e. only 1 /dev/sd* would be visible. I was hoping to be able to manually rescan the system to see if it would show up in fdisk, but even fdisk -l comes back completely blank, so I am not sure how this type of kernel works (in comparison to Red Hat Linux).

I gave up. I have 2 microSD ports I can use, and hoping the 128gb SSD card meets my needs in terms of storing all of my music. I really don't need any more storage than that, so in the end I think I will be good to go.
[MTCB Android Head Units Q&A] typos1:
Strange, what unit do yo have ?
[MTCB Android Head Units Q&A] coworker23:
Multiple USB Drive issue

http://www.autopumpkin.com/car-dvd-...system-support-3g-wifi-obd2-dvr-air-play.html

Autopumpkin 6.95" 800x480 RK3188 Quad Core. 2.67 MCU and updateKLD800x480KK4.4.4.rk3188.150713.fake firmware.
[MTCB Android Head Units Q&A] Marius B:
What difference it is between :

KGL v.2.55 with sleep and redesigned sound processor

and

KGL v.2.64 with sleep and redesigned sound processor

Thanks !
[MTCB Android Head Units Q&A] typos1:
You have a Klyde, not a Pumpkin - Pumpkin are simply resellers, nothing more.

I have a Kyde also, they must have changed something in the design.

---------- Post added at 09:45 PM ---------- Previous post was at 09:43 PM ----------

Dark Leo must have made even more improvements to the sound processing in 2.64 then.
[MTCB Android Head Units Q&A] slackmartian:
I have this unit as well, pretty happy with it :)
[MTCB Android Head Units Q&A] RyanBRZ:
Started getting a recurring google apps error so I'm going to flash something new. I've been using a coudu KLD ROM since day one which I am ok with. But I'm wondering if there is anything else out there I can try. I took a look at Malasyk's (sp) ROMs but all of the 3066 ROM's he's made appear to be 1024x768 and I have an 800x600.

I like coudu's KLD ROM because of the home screen layout with weather and time on the left, then music\radio\bt widget to the right. Any recommendations? Thanks!
[MTCB Android Head Units Q&A] agentdr8:
Malaysk makes both rk3066 and rk3188 roms, in both resolutions. Check his signature for links.

I think until recently (post-July 7th), all of his non-NEXT launcher roms were using the KLD launcher. Now he's switched to the JY launcher. Either change the launcher apk out for the one you want, or use one of the older releases.
[MTCB Android Head Units Q&A] CARRisma:
When I start Titanium Backup, the following warning message appears:

Your SU binary (version "Unknown") is functional but might not work reliably on some Android 4.3+ ROMs. If you encounter any issues in TB, please try SuperSU instead.
[MTCB Android Head Units Q&A] pants001:
I would go with the latest release and just switch the launcher APK....theres some posts with the KLD APK and even APK's for choice of colour of the standard apps (radio dvd etc)
[MTCB Android Head Units Q&A] Blankstar85:
[MENTION=456516]typos1[/MENTION] ... Its called looking up the model number provided in the post
[MTCB Android Head Units Q&A] xrapidx:
Yes... to much effort to redo everything just to see if 3G works .. and then if it doesn't... redo everything again
[MTCB Android Head Units Q&A] RyanBRZ:
Can someone give me some info on this line in Malasyk's ROM post? The ROM prior to this (July 7?) does not require this.

DO NOT FORGET after installing the firmware go to PCVStartupBuilder program and install the programs you need when you start the system and restart the device !!!!

Under July 26, 2015 for for 800X480 Only for RK3066
[MTCB Android Head Units Q&A] antvic:
Because running at me with flash drive and without doing anything. He was thus of origin. Best regards
[MTCB Android Head Units Q&A] gguevara:
Hi dsa,

Thanks for the reply. My unit was freezing alot. But I tried the MCU and firmware combo you suggested and all seems good. I was clicking away all over the place, I even installed a couple of apps from the playstore, and it was stable (no hickups so far). I will keep monitoring it for stability.

The firmware I found on the gDrive was the same one you suggested, but it ended in 150713z. Other than that, there seems to be no issue. However, I beleive this firmware is not rooted - I did not see superuser installed. I just want to make sure this is the one you were suggesting. In the meantime, I will monitor the stability and if it is a good firmware. If it is, I will come back to see how to have it rooted.

Thanks again :good:

gg

**UPDATE**

Its been 4 days and its working great since using the new firmware/mcu combination - until today :(

The unit all of a sudden does not want to boot up. It shows a black screen, but I can still hear the beeps when I press the reset or power buttons. However, this time I don't think its the firmware at fault. Today was a very hot day here in the NYC metro area (92*F), and even hotter inside the car after sitting for hours in the sun (with a dark interior). Is it true that these units (KLD) have a thermal protective switch, that prevents the unit from booting or shuts it down in extremely hot conditions? If this is true, what is the fix for helping to prevent this from happening?

In the mean time, I will try to turn on the unit early tomorrow morning (while its still cool outside), and see if the temp is interfering :fingers-crossed:

gg
[MTCB Android Head Units Q&A] antvic:
It is true that you can make ROOT in KitKat 4.4.4. You could extend this information. Not find nothing on the subject in the Forum. Thank you.
[MTCB Android Head Units Q&A] xrapidx:
Anyone tried MCU v.2.55 for KGL? https://drive.google.com/folderview...sp=drive_web&tid=0BxmzvLRI7-eNRnFsQlIyVkI5c0k

Not sure which one its for?
[MTCB Android Head Units Q&A] Billkaza:
I ordered a motherboard from Klyde with TEF 6686 instead TDA 7786 that i use now. Difference is only radio module as i could understand compared each next to each other..

What i have understood is that motherboard with tef 6686 uses KLD2 mcu and 7786 KLD mcu.

I ordered new motherboard as i have heard and Jacky also told me that Radio signal is better and RDS is working.

It arrived with 2.67 MCU installed.

What i saw is that indeed RDS is working but signal is worse than with 7786. Maybe it is MCU? i dont know has anybody tried different MCU to 6686 to see if there are differences?

Also something else is that music volume is half than it was with previous and they use both 7388. It is like amplifier is only 50% of the power of the previous board.
[MTCB Android Head Units Q&A] coolxal:
Anyone find a solution to the wifi not turning on?

Why did I buy this thing...
[MTCB Android Head Units Q&A] Billkaza:
I dont think it is this as at max volume 60-70% of previous board sound get disorted and previous wasnt at this level.

But to be 100% sure i will check it
[MTCB Android Head Units Q&A] coolxal:
What am I looking for? The wifi doesn't turn on at all, it tries to turn on then fails and turns off.
[MTCB Android Head Units Q&A] slackmartian:
Maybe try a factory reset and if that doesn't work try a different mcu/rom combo?

---------- Post added at 01:08 PM ---------- Previous post was at 01:07 PM ----------

I just bough this, has anyone tried 3g connection before? Curious to see how it works ...

http://www.ebay.com/itm/311267420590?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT
[MTCB Android Head Units Q&A] coolxal:
I already tried Malaysk's latest ROM and Coul's as well. And a modded MCU.

Has no one else encountered this issue with a JY unit?
[MTCB Android Head Units Q&A] coolxal:
Does any USB WiFi adapter work or does it have to be the one sold by the Car Stereo sellers?
[MTCB Android Head Units Q&A] slackmartian:
Thanks!

One thing I did not find any information about is the sim card slot, is it a micro sim or nano sim?
[MTCB Android Head Units Q&A] xrapidx:
Which mobile settings app? The normal android one?

Trying to find the ppp script thread on my phone... mine has a new problem. Gets signal bars... doesn't connect.