yashsingh1/xdaforums huggingface dataset:
[MTCB Android Head Units Q&A] agentdr8:
Which sources did you have selected for mode switching? I'm still in the process of refactoring the mode switching; the current implementation relies on too many unknown variables, and sometimes leads to NPEs, which in turn cause the MTCManager to crash, resulting in a reboot.

Give it a minute to reset the brightness; I didn't want to bog down the system with checking every second, so I'm using the TIME_TICK intent, which is fired once a minute. Also, Screen Filter is an additional xposed module that can be automatically enabled and disabled by XMTC.
[MTCB Android Head Units Q&A] edit:
Hmm, I think I gave it some time.... can't say how much exactly.... not sure if i gave it enough because I did not know how much is enough... I would probably need to try again and give it a lot more time...

Let me get this clear though, the dimming is it software 100% or might be a hardware thing also?

L.E : Given the fact that the dimming is auto controlled by the time/gps is it possible to gradually dimm (a few steps) the unit as it gets darker and darker outside?

Thank you !

P.S : Can you quick patch the app and let me beta test it? (ofc if it does not break my unit, lol)
[MTCB Android Head Units Q&A] agentdr8:
I take it back. I went out to the garage and played around with the headlights and sure enough, there's a slight reduction in backlight intensity. Guess I never noticed it before. Seems to be hardware-controlled, as the software backlight value is still 255. Not much I can do about that. Sorry.

As for the mode switching, that'll take some time to rewrite. And then there's a whole testing phase that I go through before releasing, since it's a PITA to work on these headunits when they're mounted in a vehicle. TWRP is a nice addition though; makes getting out of xposed module-induced bootloops very easy.
[MTCB Android Head Units Q&A] edit:
OK, Thank you for testing and sorting this thing out... I guess I must install a switch to enable/disable the orange wire when needed.

Looking forward to hear that you removed the bug that is messing with my unit :P

Thank you very much for all the help !
[MTCB Android Head Units Q&A] Reptile-X:
I am not sure about replacing the amplifier IC with another one, the other components around the original could be a problem, the Toshiba one is 45watt, only 4 watts higher each channel but like i said I am not sure about it.
[MTCB Android Head Units Q&A] R4D3N:
@ Malaysk I have a big problem. Everytime I plug a USB Stick, the unit restart and it wont turn on until I hit RESET button. After reset, everything works well.

And when I press the MODE button, again the same problem: the unit hangs with the logo on screen.
[MTCB Android Head Units Q&A] edit:
I know that I am asking a lot here but how much time it will take approx ? 1mo, 2mo? I can hardly wait the feature :)

Tell me more about TWRP, is it easy (quick) to install (given the fact that the unit is in the car and not on my desk). And these bootloops, what can I do to break the looping IF i don't have TWRP.... nothing seemed to work in my case...
[MTCB Android Head Units Q&A] Ezreal:
So im about to get a Huifei KGL for an audi a4 b6 same as this one: http://www.ebay.co.uk/itm/171715585202?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT

Any bad feedbacks about it?

Is it worth the 400€?
[MTCB Android Head Units Q&A] Ezreal:
There are?

For an audi a4 b6? Could you link me?

This one was made for my car so thats why i was thinking in buying it..
[MTCB Android Head Units Q&A] agentdr8:
Can't say for sure how long it'll take. Between (actual) work, family time, personal time, it's hard to know how much free time I'd have to dedicate to it. I've been working on it for the past month or so, but progress is slow at this point. I've thought about buying another headunit just to put on my desk to ease development work, but I can't justify the cost. Maybe if someone had a semi-broken one (bad audio, bad ports, but working screen and main board) and wanted to recoup some money that would be an easier buy.

For now, you can safely disable mode switching in XMTC and the rest should work just fine.

Once you're on a rooted rom, you can flash TWRP from within Android. [MENTION=853627]coudu[/MENTION] posted some instructions a while back. You can't install any firmwares or MCU updates using TWRP though, so it's main purpose on these headunits is just for dev stuff. If you don't have TWRP, you have no way to mount /system or /data from stock recovery, and thus you have to flash a whole firmware and start over to get out of said bootloop.
[MTCB Android Head Units Q&A] Ezreal:
I´ve spent hours and hours searching on ebay.uk and ebay.de for a good solution

The thing is, im trying to buy from countries inside european union, since im from portugal, buying these radios from China would make me pay many € in taxes and stuff like that..

I cant find the quadcore one on the european union..
[MTCB Android Head Units Q&A] typos1:
It depends what source you get your info from, I ve seent eh TDA7384 listed as 35W, 40W and 45W, not 41W though, but since its the amp the is the source of the power its not gonna break anything, plus since Roadmaster uses the Toshiba is should be compatible, the pins appear to be the same, although of course it may not be, cant remember now whether there is a "TB2929" setting in factory settings or not now.

Google it, I m sure your ll find a quad core in Europe, if you really must buy from there, cant see whats wrong with China though, just factor the import duty into the price, I bet its still cheaper.

As for looking OEM, there are literally hundreds of units of this type, some universal, some OEM look, only the board with the cpu on it is changed for the quadcore units, so there ll be Audi A4 types with quadcore out there.. They are all very similar inside with different outsides.

Also, spend some time reading the thread before you buy to get yourself familiar with everything.
[MTCB Android Head Units Q&A] Reptile-X:
I didn’t get the info from somewhere, I am electrics engineer (not electronics btw, so I could be wrong) it’s just a hunch. I don’t think it will blow out any other component too, but it can cause small functioning problems. Maybe some electronics guru could enlighten us.

I don’t have TDA7384 either :D see picture I post above mine is TDA7388 and some data sheets says it is 45Watts but digikey reports 41Watts, which I trust more.

I would love to hear more from you, when you try the other IC.
[MTCB Android Head Units Q&A] ronnieeeeeeeeee:
Anyone have more information on why I must start the radio app before my sound will work? I want to uninstall or disable this app but I can't do that if I have to run it every time I get in my vehicle. I have the Eonon G2110ZV
[MTCB Android Head Units Q&A] kaween:
Providing the chip is chosen within a given series, changing it should work.

There are little amp board available which accept a range of different output-stage amp chips to illustrate the capability of having a certain range of choice when it comes to these chips :

h t t p ://www.aliexpress.com/item/freeshipping-tracking-numberHifi-TDA7850-4channel-car-amplifier-board-4-x50w-BA3121-noise-reduction-without-power-amplifier/1723959099.html

In any case, I confirm pin compatility of the toshbia TB2929HQ and the TDA7384 after comparing the datasheets. I see no reason why it shouldn't work.
[MTCB Android Head Units Q&A] kvegeta:
guys i'm having issue with car service....i don't know what happen (no connected on line the unit since few days) i have started my car and when i used swc on poweramp for next track or prev track another music player started and i can control only this sw in background (i can enter on it thru the notification bar)...poweramp stay paused °-°

Locking in the app list it doesn't appear (on the grill, not in settings) , if i deactive this software "Music" (i have two of this installed...the original one with the system and this "new") swc doesn't work anymore with poweramp... i really don't know how to do °-°
[MTCB Android Head Units Q&A] Gazeko:
Sorry for me beeing stupid .. i`ve found the file i am supposed to change here \Misc\JavaSrc\com\microntek\music\musicactivity.java and changed it to

SendCanbusinfo(int i, int j)

{

Intent intent = new Intent("com.microntek.canbusdisplay");

intent.putExtra("type", "music");

intent.putExtra("all", music_list.size());

intent.putExtra("cur", 1 + currentPlayIndex);

if (j <= 0)

intent.putExtra("title", 0);

else

intent.putExtra("title", i);

sendBroadcast(intent);

}

i will try if it worked soon :) thank you very much!
[MTCB Android Head Units Q&A] antvic:
I have a Skoda Octavia and all CAN Bus signals work perfectly
[MTCB Android Head Units Q&A] Ezreal:
I have found the perfect radio. OEM look, android quadcore with 1024 screen.

http://kaigele.en.alibaba.com/produ...d_Gps_Navigation_Radio_Tv_Bluetooth_Ipod.html

Did anyone buy from this website? Can we use paypal? is it trustfull?
[MTCB Android Head Units Q&A] typos1:
Somethings gone wrong with the quoting system, I guess you meant to quote the guy with the KGL DVB-T box ? He posted pics a few posts later, its a DVB-T HD box.

Cool, I ll deffo try doing that at some point then.

Its the website of KGL - the manufacturers of KGL units.
[MTCB Android Head Units Q&A] Ezreal:
Can we use paypal there?

Did you ever order anything from them? How much have you paid in taxes?

Thanks
[MTCB Android Head Units Q&A] typos1:
No paypal, you can tell that just by looking at the listing, its not mentioned, tax depends on your country, I dont have a KGL unit.
[MTCB Android Head Units Q&A] kaween:
I've swapped amp chips-a-plenty in my days (defective ones that is) : be careful when doing this.

Most of these output-stage chips are pretty vulnerable so take precautions in terms of grounding when doing this.

Myself, I've noticed the RK I've here is simply not powerful enough to get my speakers to come alive. And I'm not talking about "loud sound" : it just misses the power to allow for a decent frequency response from the speakers, leaving the mid-range freqs completly lifeless. It's a common problem with some aftermarket speakers : the cone material is simply stiffer and requires more power to get the stuff swinging (quite litterally). I'm pretty sure it wouldn't have been an issue with the original 13cm broadband speakers, but getting the 16.5's Focal's (in my car) or the Sinuslive's (my wife's car) to move simply takes more power.

Being the cheap-*ss that I am I was not happy with the prospect of spending much -if anything- for an external amp. In the end, I came across the ultra compact Caliber CA475 "D" class amp which I could buy for 129€.

I hooked it up to the line outputs of the RK and I'm happy to say the results were very agreable.

The only iffy thing is the "remote" control line of the CA475 didn't talk too well with the Amp Control Line of the headunit : when off, the headunit was not able to force a 0V status on the CA475, as a result the amp never switched off. Solved that by using a micro relais that is driven by the headunits' Amp Control line and forces a true 12V when turned on, and a real 0V GND level when switched off.

So all is good now. :)

The only thing that still surprises me is the HUGE amount of power this headunit drains from the battery after shutting it down : at 12.6V, the unit keeps draining 0.59A from the battery if you'd hook it up in a "ACC always connected" fashion. If I hadn't solved the "my external amp not switching off like it should" issue, the power drain went up to 1.2A .... when the radio is turned off.

As I run my stereo from a dedicated pico-ups power controlled circuit with its own battery source there's no reason to fear the main battery getting drained below a critical level, but this kind of powerdrain was not really something I did expect.
[MTCB Android Head Units Q&A] Malaysk:
After installing the firmware you do a mandatory reset system check formatting the SD card in the Settings ?????? You have the wrong size after flash drives.
[MTCB Android Head Units Q&A] kaween:
HU level of course.

I noted this value on my regulated PSU and double checked it when the unit was sitting on my electronics testbench with an inline current meter as I found this quite hard to believe at first.
[MTCB Android Head Units Q&A] kaween:
Personally I don't really care.

As said, my HU's run from a seperate battery circuit preventing it draining the main battery.

But it did surprise me nonetheless.
[MTCB Android Head Units Q&A] R4D3N:
I have done the Reset to factory settings and the USB drive is formatted FAT32 and has 16Gb.
[MTCB Android Head Units Q&A] Malaysk:
And when did Reset to factory settings - we put a tick there format SD card?
[MTCB Android Head Units Q&A] Marius B:
it is very ok . i buy from there.
[MTCB Android Head Units Q&A] R4D3N:
Yes.

I tried all USB ports. The front one works ok, the back ones have problems. You think it is a power issue? I will try with a powered usb hub.
[MTCB Android Head Units Q&A] Ezreal:
Are you able to buy one unit only?

Because i see minimum order is 4 pieces..

Which radio you bought from there?
[MTCB Android Head Units Q&A] Reptile-X:
Nice, thanks :good:

Let us know how it comes out when you do this please. I already ordered a TDA7388 from local store and it takes 4 days to arrive, I have some time issues and I will go on vacation with the car 3 weeks later so I can’t try the other IC’s.

I am thinking little further back and I want to eliminate the problem if there is any with this issue, the back of the unit gets pretty hot and the TDA7388 is the main heat source there. Last year while we where on vacation, the radio was on at least 27 hours in a row (driving with 2 drivers) and I think the IC is slowly damaged because of the heat, which is common with these kind chips.

So I was experimenting today with some cooling rib and fan, I have old salvaged stuff so I put one cooling rib with a fan on back plate, measured some temperatures and it is helping, I know there is room behind my unit, I am not sure if the room is enough but we will find that out, using heat sink for better heat transforming.

This is how it will look like:
[MTCB Android Head Units Q&A] ffwd4490:
Are you using external amps?
[MTCB Android Head Units Q&A] typos1:
The KGL radio widget has preset buttons on it, dont know if they will work with SWC, but its worth a try:
[MTCB Android Head Units Q&A] pakyemme:
mcu 2.55 malaysk on the KLD2

Hi malaysk

Can ask you a information? Working This mcu on the kld2 unit?

Thanks
[MTCB Android Head Units Q&A] Malaysk:
Hello. I do not know. May not work Radio. May not operate properly hardware buttons. You can check. I put the firmware on your device - nothing terrible happened.It does not work the radio. And so everything was fine. :)

+++++++++++++++++++++++++++++++++++++++++++++++++++++

The announcement of a future firmware - :D https://www.youtube.com/watch?v=3NeUSucg96Q
[MTCB Android Head Units Q&A] pakyemme:
I would like to update to 2.55 because my native mcu 2.51 has some problems...:

The next/previous 's wheel has opposites (when you selected next song, it going to previous..) and the video player brightness is low.

Thanks a lot
[MTCB Android Head Units Q&A] Oberbergler:
Android 5

Hi,

can we expect Android 5 for our Huifei or will be 4.4.4 the last firmware?

I found nothing in google.
[MTCB Android Head Units Q&A] antvic:
How can I install ClockWorkRecovery to make a backup of my computer before upgrading to KitKat.

Where possible, this backup only can be the Android part, I guess. I don't think that it can be done from the MCU asked this because it is what I have done in all my Smartphone since I know Android and wonder in this forum talk little of it.

That would avoid the problems many people who updated their computers and then have a problem with. With this method they could return to retrieve a good copy. This has happened to me sometimes with my smartphones. Thanks again

Thanks to all who do this forum
[MTCB Android Head Units Q&A] devin2:
Same problem

Hi

I have the same unit with KYD 2.43...

Same problem

I made the modification : cut the external mc connection and connect it directly on the mic input of the bluetooth circuit and it's the same thing: I receive and heard correctly the people who phone me, but my voice is always very very low, it' only correct when the external microphone is to ten centimeter of my face:crying:...

I write many many time to Witson ( KYD manufacturer) and always the same answer : wait a new MCU but no new MCU

Then since 2 weeks no answer from it about this problem ...
[MTCB Android Head Units Q&A] ronnieeeeeeeeee:
I believe so, but the amp is set up through the factory system. So I have an amp, but it's going through the usual stereo wires. After removing the factory head unit I no longer have control over my Fade settings (which sucks, but I don't think is fixable). Would using a different .mcu work? I didn't have the trouble until I updated my .mcu.
[MTCB Android Head Units Q&A] edit:
I have the same unit and the same problem and unfortunately I don't have the tools or the skills to correct the problem... If you ever get a MCU that solves the problem (I highly doubt that) please post it here.

Thank you!
[MTCB Android Head Units Q&A] kaween:
As I understand them, no they didn't disconnect the C32/C102 .. or whatever component their specific headunit uses in the connection to the BT board .

And you really need to do that to have something that resembles a workable BT handsfree solution. Otherwise the internal and the external mics are connected in parallel, causing all kinds of electrical crap (wrong impedance load, bad signal respons as result) and not helping anything. I'd be very surprised if we'd ever see a software-based solution/update for this specific issue.

PS : I've noted an oddity with the unit with the unit when using an external amplifier.

When the extrnal amp is fed with a High-level input (so basically, you connect the speaker output of the HU to the external amp), the unit behaves exactly the same as without amp (... except for a much higher power output of course).

But when I use the line-outs of the HU to feed the amp, everything works EXCEPT the "key sound" setting, the audible "Beep" feedback when you press a hardware button and stuff. Again, this isn't a behavior I'd expected but it's not a problem, I normally disable that "key sound" thing anyhow. It is just odd there's a difference in the unit's behavior if your using line-out or speaker out.
[MTCB Android Head Units Q&A] FrenchSparda:
Even SDRTouch radio can't work ?
[MTCB Android Head Units Q&A] :
Joying is working on Lollipop they said in a blog post. I assume the other manufactures will do too. So eventually it will be available.

Gesendet mit Rauchzeichen von unterwegs
[MTCB Android Head Units Q&A] pk313:
Somebody report that's working nice...but I think is not a real radio fm app car oriented ...but I will try

And again AF system I don't think is on the features. ...

On the MTCRADIO AF is set for U.S. ..that's works in different bit rate underfreqyency. ..can't work in EUROPE ...need somebody eable to make some small mod inside app that's all
[MTCB Android Head Units Q&A] devin2:
Yes I separate the internal mic from the BT card by removing the capacitor ( c102)...

I have no noise like this , the internal mic is ok for Android use, but the external mic is always too low fot the BT
[MTCB Android Head Units Q&A] kaween:
? "from the HU itself" ?

That would mean there's some kind of piezo-speaker on your mainboard. The JY board I've got has no such thing, so that kinda makes sense.

Ah well, it's no a great loss. It's just a bit strange that the system-beep is differently routed depending on what output path the sound uses.

[MENTION=801471]devin2[/MENTION] : what kind of mic are you using and where is it positioned ? Because in my experience with other systems, positioning is everything.

Also : if you'd be using an original, manufacturer-fitted mic, most of these mics use 3 wires : gnd, signal and Power (!). This power line would be provided by the original head unit, but I've not yet seen an aftermarket android unit which provides this powerline. A long shot, but just asking.
[MTCB Android Head Units Q&A] Gazeko:
Hey agentdr8,

i´ve tried to edit this Version of TMC Music but it won´t let me install. I´ve extracted the classes.dex with winrar and than i've decompiled it with ROMToolsPCv3. Than i edit the MusicActivity.smali with Notepad ++. The Canbus related information was :

.method private SendCanbusinfo(II)V

.registers 6

.parameter "cur"

.parameter "dur"

.prologue

.line 248

new-instance v0, Landroid/content/Intent;

const-string v1, "com.microntek.canbusdisplay"

invoke-direct {v0, v1}, Landroid/content/Intent;-><init>(Ljava/lang/String;)V

.line 249

.local v0, it1:Landroid/content/Intent;

const-string v1, "type"

const-string v2, "music"

invoke-virtual {v0, v1, v2}, Landroid/content/Intent;->putExtra(Ljava/lang/String;Ljava/lang/String;)Landroid/content/Intent;

.line 250

const-string v1, "all"

iget-object v2, p0, Lcom/microntek/music/MusicActivity;->music_list:Ljava/util/ArrayList;

invoke-virtual {v2}, Ljava/util/ArrayList;->size()I

move-result v2

invoke-virtual {v0, v1, v2}, Landroid/content/Intent;->putExtra(Ljava/lang/String;I)Landroid/content/Intent;

.line 251

const-string v1, "cur"

iget v2, p0, Lcom/microntek/music/MusicActivity;->currentPlayIndex:I

add-int/lit8 v2, v2, 0x1

invoke-virtual {v0, v1, v2}, Landroid/content/Intent;->putExtra(Ljava/lang/String;I)Landroid/content/Intent;

.line 252

if-gtz p2, :cond_2e

.line 254

const-string v1, "time"

const/4 v2, 0x0

invoke-virtual {v0, v1, v2}, Landroid/content/Intent;->putExtra(Ljava/lang/String;I)Landroid/content/Intent;

.line 260

:goto_2a

invoke-virtual {p0, v0}, Lcom/microntek/music/MusicActivity;->sendBroadcast(Landroid/content/Intent;)V

.line 261

return-void

.line 258

:cond_2e

const-string v1, "time"

invoke-virtual {v0, v1, p1}, Landroid/content/Intent;->putExtra(Ljava/lang/String;I)Landroid/content/Intent;

goto :goto_2a

.end method

First question is if its right to change iget v2, p0, Lcom/microntek/music/MusicActivity;->currentPlayIndex:I to iget v2, p0, Lcom/microntek/music/MusicActivity;->title:I ? And is that enough?

Well i've tried that and after that i've compiled it again with the tool is used before and overwrote the old classes.dex with the new one (WinRAR). But it won't let me install. I was trying it for hours but I don't know what i did wrong or if i even did something right.. It would be really awesome if you could help me and i hope that i dont annoy you to much, I'm just really new to this topic :)

Thank you
[MTCB Android Head Units Q&A] lfelix70:
Cobra Iradar 950

Hello Guys, I recently bought a Cobra Iradar 950 I have not been able to pair it this my head unit. IAnd I know it not the radar, because they booth pair with other devices. Does anyone has a solution or suggestions, they are both welcome.

Thanks.
[MTCB Android Head Units Q&A] maverick_37:
Maybe you can help me out?

I have a Skoda Octavia III 2014 but my canbus is doing all sorts of things except working properly.

Still have a discussion with the vendor but maybe you can give some pointers on how your settings are in the unit.

I checked mine and it is on VW/Skoda simple.

Thanks

Marc