yashsingh1/xdaforums huggingface dataset:
[MTCB Android Head Units Q&A] Us-Marshal:
I built the circuit in the manner I did to have confidence that the desired signal would be reproduced by default and only by energizing relays could that be overridden - this is a 'fail safe' of sorts and assures that there is never >1 signal being fed to the deck. Attached is a (crude) image to show whats happening. Note: this switcher utilizes DPDT relays in series to switch video signal and video shield connections.

Relay 1 common pins (4 & 13) are tied to the deck video in (pin 4 is video signal and 13 is shield). When at rest (not energized), relay 1 is providing a path for the backup camera pin 6 (video signal) & pin 11 (video shield) to the output pins so when the deck is told the car is in reverse it sees video from relay 1 pin 6 & 11. At this point relay 2 can be in any state (turn signals on/off/whatever) and there is simply no path from relay 2 to the deck.

Now, when we energize relay 1, output pins 4 & 13 are connected to pins 8 & 9 which are tied to the output of relay 2. So if relay 2 is at rest, pins 6 & 11 (from relay 2) have paths to the deck. When relay 2 is energized, pins 8 & 9 have the path. Therefore, if relay 1 is at rest it will simply pass signal from backup camera- irregardless of relay 2 state.

Here are the state and output

Relay 1 at rest - Backup camera

Relay 1 energized & relay 2 at rest - Left Camera

Relay 1 energized & relay 2 energized - Right Camera
[MTCB Android Head Units Q&A] Us-Marshal:
I cannot help provide a solution, but I can offer more data. I have the issue as described (and it bugs me) and I have 'official' KLD 4.4.4 with MCU 2.20.

Android: 4.4.4_23122014

MCU: MTCB-KLD-V2.20
[MTCB Android Head Units Q&A] ProfessorKnox:
You may have a look @ post #7780.

[MENTION=456516]typos1[/MENTION]: Maybe a reason why you didn't see the dynamical change of the button name is, because potentially you live in a country/area where re-assignment of the PS element isn't done by the providers? I'm quite confident that the behaviour isn't dependent on / caused by the receiver chip itself but on the processing of the RDS data elements afterwards by the MCU and/or radio app.
[MTCB Android Head Units Q&A] gmanor77:
Phone call while listening to radio

Hi,

Just installed KLD radio on my Suzuki S-Cross.

While listening to the radio and trying to make a phone call through bluetooth - when pressing the "bluetooth" icon to enter the dialer the radio stops.

Can I dial while listening to the radio, make a call (without the radio), and then continue listening to the radio?

Thanks.
[MTCB Android Head Units Q&A] victormartins:
Interesting about this shortcut, didn't know about it!

I just did a factory reset and now it works!

I think i'm goint to use PowerAMP, I have the full version purchased (99 cents only on sale).

After the factory reset, the rear USB constantly says it was disconnected. :(
[MTCB Android Head Units Q&A] Nova8316:
Canbus

Hi,

Is there a way to directly acces the can controler or is it reserved for built-in applications?

Also have you a "Vehicle" application ? In mine, I can see some data like RPM, speed, battery voltage.

I think these 2 questrions are tied.

Thansk
[MTCB Android Head Units Q&A] TooBusy:
The 3G router description says:

Compatible with HSDPA/HSUPA/HSPA+, CDMA EVDO Rev A/B including more than 400 kinds of popular USB 3G modems all over the world, dial automatically without any manual setting.

This is similar to plugging in the dongle to the HU directly. No guaranties it will work with a particular dongle and provider.

I'm not sure if [MENTION=6321462]the-fabio[/MENTION] is happy with this alternative, but I still prefer the dongle only.

There are two other options. Some people use a WiFi modem. It can be 4G as well. If I decide to use it, I will replace the battery with a DC converter, similar to the one used with the router.

Some people use WiFi tethering from their phone. This is what I use at the moment, but only occasionally, as a temporary solution.

I might eventually go for a WiFi router or a WiFi modem, but I'm not giving up yet. 3G dongle (only) works for some people. If only they would be willing to share their experience...
[MTCB Android Head Units Q&A] Us-Marshal:
Yes, that is correct. I mentioned diode isolation in a earlier reply. The explanation of the switching design/logic was not intended to cover comprehensive installation. If you didn't isolate triggers you would surely back-feed 12v+ and have undesirable results.

Regarding the backup turn signal thing - I can assure you I do not lose my image. I didn't map out the entire installation, but relay 1 trigger 12v+ is simply not sent if my reverse lights are on. Thereby assuring reverse priority. I mentioned 'being committed' to the installation in an earlier post because the build of the relay switch is only half the battle. Finding appropriate triggers and isolating them properly is critical for proper function and that is very much vehicle-specific.

The mandate you mention is perplexing because I don't recall my factory backup camera turning off when I used my indicator either.
[MTCB Android Head Units Q&A] the-fabio:
Help!!! I tried different ROMs from here, and root them all time with Root Master 2.1.1

But now they removed the application from Google play store who is required.

Is there some other option? I tried many others, most of them are full with Chinese language.
[MTCB Android Head Units Q&A] patagonia1:
You could try some of the Codou´s or Malaisk´s 4.4.4 ROMs as they come pre-rooted. If not I´m sure someone posted another app that could root the units some 2 or 3 month ago.
[MTCB Android Head Units Q&A] the-fabio:
View attachment 3141409

This is the ROM who I can't leave without root
[MTCB Android Head Units Q&A] TooBusy:
Root Master 2.1.1 doesn't work on Android 4.4.
[MTCB Android Head Units Q&A] the-fabio:
Which ROOT-APP does work on 4.4.2?
[MTCB Android Head Units Q&A] MrRimmer:
The 9 bad equalier that isn't

After upgrading to 4.4.4 and MCU 2.11, I have had an opportunity to play around with the sound settings and have noticed that the equaliser in Settings, although it shows 9 bands in fact still only controls 3 frequency ranges - 100Hz, 1000Hz and possibly 10000Hz with quite narrow spreads (the 100Hz control does not affect 60Hz tones at all).

What the developers appear to have done is set up groups of three sliders to operate each band, so the boost/cut of each slider is added together for that band. Utter rubbish.

Also,the frequency-dependent distortion seems to vary by input and time so that when I was testing AV IN, the front and rear right channels were undistorted but rear left showed the same patterns as before but at a different frequency range (from 100Hz to around 800).

Also I've tried plugging in a USB sound card but the unit doesn't do anything with it.
[MTCB Android Head Units Q&A] Us-Marshal:
So - newb question here about rooted roms. I have official 4.4.4 KLD rom installed. Can I simply install a rooted rom or do I have to revert to 4.4.2, do the root thing, then install rooted 4.4.4?

Btw - I downloaded the root app posted some months back and AV quarantined it for some virus - cannot recall what it was. Just FYI.
[MTCB Android Head Units Q&A] swanie2000:
Thanks,

Yes, I did see the post you pointed to.

From that post, it appears that modifying the radio app is the most likely solution?

I'm afraid that option is beyond my skill set.

Maybe one of the real talented programmers on here will have a go at it.

For now, I am going to try and just turn off the radio text.

Swanie
[MTCB Android Head Units Q&A] exitido:
Hi, i have a problem with my frontal camera.

I only can record my track with track recorder included in my head unit ( but without the gps information, i dont know why)

If i try record with track recorder plugin of torque, or with camonroad app, i can visualize image on screen, but when i click on récord button the camera turn off and the app force close.

I can do anything? Maybe buy another camera?

With track recorder included in the head unit i dont have major problemas, but i want use camonroad...

This is my camera:

http://es.aliexpress.com/item/USB-P...-2-Car-DVD/2053660679.html?isOrig=true#extend

Sory for my english

Edit: i downloaded galaxy s3 versión of camonroad and torque, maybe this is the problem?
[MTCB Android Head Units Q&A] marco.lav:
wi fi fix

hi there..

I fixed the cable wi fi, putting a plug external and connecting an external antenna.

now works correctly.

[IMG="wi fi fix, power supply for amplified antenna"]https://lh4.googleusercontent.com/-lw_d8HJc_nw/VMmdvCstrCI/AAAAAAAALOs/7koUN-q24X0/w737-h553-no/20150129_021531.jpg[/IMG]

Some cars have an amplified antenna

requires 12 v on Central.

This internal modification allows your stereo to feed the antenna properly.

if you need the schematic, you will draw the outline.

[IMG="Electrical circuit power Suppy antenna"]https://lh6.googleusercontent.com/-zt1KApseQbQ/VMmdkU5G-CI/AAAAAAAALQU/ghhyTD-D0Ks/w737-h553-no/20150129_021519.jpg[/IMG]

[IMG="wi fi fix and Power supply antenna"]https://lh4.googleusercontent.com/-lw_d8HJc_nw/VMmdvCstrCI/AAAAAAAALOs/7koUN-q24X0/w737-h553-no/20150129_021531.jpg[/IMG]

Special Thanks Leonardo Divito
[MTCB Android Head Units Q&A] Us-Marshal:
Did you ever resolve this? I know in my 2013 JKU there is no switched 12v+ provided at the radio. I had to find switched 12v+ elsewhere in the dash and connect to deck red wire. After doing this everything powered up properly.
[MTCB Android Head Units Q&A] Palinkat:
Permanent video output possible?

Hi All,

I tried to search as best I could in the thread but couldn't find an answer.

I have a Klyde model, EONON GA5153 for WV cars.

Does anyone know if it's possible to permanently output video to rear headrest screens.?

It works fine when using the DVD or Video player apps but I'd like to have it all the times, kids like to see what's playing on the HU . I guess it's application dependant but maybe there's a trick or an app that can do that.

This was a feature on my previous HU, EONON GM5153.

Thanks a lot
[MTCB Android Head Units Q&A] marco.lav:
Project delay shutdown UH

this little scheme,

has the task to turn off the UH after a certain time.

so as it was built, has a time varying from 10 minutes to about 100 when the trimmer.

I am attaching photos in the printed and the final product.

[IMG="Power delay Shutdown"]https://lh3.googleusercontent.com/-8IyebdM_c0A/VMqodj3bCZI/AAAAAAAALPQ/Tj-_oUs54Bc/w737-h553-no/20150129_222649.jpg[/IMG]

[IMG="delay Shutdown UH"]https://lh5.googleusercontent.com/-KsbIoh4OV1Y/VMpCfxzNukI/AAAAAAAALO8/_tUFoiDikBA/w415-h553-no/20150129_152328.jpg[/IMG]

Legend :

* + Batt = 12 V from batt

* - Batt = 0 V Ground

* - Quadro = from 12 V under key

* - Radio = to Red wire on UH

you have to stop the wire that comes from under the key and go to the Red UH

I hope I was clear

Special Thanks Antonio Santoro!
[MTCB Android Head Units Q&A] Us-Marshal:
Yes - every input trigger must be diode isolated and the 12v+ from backup light (connect to deck reversing wire) must also be isolated to prevent your reverse lights from illuminating when relays are energized and the reversing wire on the deck is fed 12v+. You simply tie into the deck reversing wire before the backup light illumination isolator diode.

For clarification, I have a relay energized by my (diode isolated) reverse lights that is connected to relay 1 trigger input. If this relay sees 12v+ from reverse lights, it simply 'disconnects' relay 1 trigger input.

The concepts here (relay and diodes) are elementary, but the implementation takes planning and understanding. it's surely not rocket science, but you have to understand your vehicle to make it work as intended.
[MTCB Android Head Units Q&A] agentdr8:
If you search the thread, someone had connected a USB DAC to these headunits and provided instructions on how to configure Android to utilize it for sound.

The MCU is responsible for video output switching, and is controlled by the MTC applications. I haven't had a look into any of those apps yet to see if it's possible to enable mirroring of other sources.

Nice job, and thanks for posting it up for others.
[MTCB Android Head Units Q&A] marco.lav:
I believe that a community living experiences and sharing them,

only in this way there will be growth.
[MTCB Android Head Units Q&A] swanie2000:
I am not following the extra camera switcher design very close, but as an Electronic Bench tech myself, I must give you props for the creative use of ASCII code to produce a simple schematic!

Swanie
[MTCB Android Head Units Q&A] typos1:
None, as it says on the first page 4.4 and 4.4.4 can ONLY be rooted by installing a pre-rooted firmware image.

Wow, that looks good, I m sure you could sell some to people on here.

---------- Post added at 05:05 PM ---------- Previous post was at 04:58 PM ----------

I assume youre using a CAN Bus adapter ?

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

Yes, the problem with the equaliser has been mentioned on 4pda.ru and its obvious when you play with it that half the sliders dont do anything, dunno why they did this, they may as well have kept the previous high, low, mid set up.

As has been discussed many many times before, the built in music/radio/BT music/ipod apps have sound that is controlled by the MCU. If you are not happy with the sound and you want Android to it then you need to install Viper4Android or Poweramp, or as agentdr8 says, install a USB DAC.

---------- Post added at 05:15 PM ---------- Previous post was at 05:06 PM ----------

It may be to do with the radio stations in your country as Professor Knox said earlier.
[MTCB Android Head Units Q&A] the-fabio:
And now I'm hanging on this ROM?! Is there some way to enter the recovery?!
[MTCB Android Head Units Q&A] exitido:
Can You confirm that your microsoft camera can récord on torque plugin?
[MTCB Android Head Units Q&A] koimr:
Thanks!

Hi Ken,

Your English is just fine. Just wanted to say thanks! :) I am up and running Coudus KLD v4.4.4/MCU 2.16 and all is working great.
[MTCB Android Head Units Q&A] the-fabio:
This is the Firmware what i got now on my Erisin 9746A. And now i want to go back to Coudus 4.4.4, but i didn`t get Root access to boot into the Recovery.
[MTCB Android Head Units Q&A] agentdr8:
You can just use the reset button and the power button if your unit is so equipped.
[MTCB Android Head Units Q&A] typos1:
You dont need root access to go into recovery, either use the "reset" hole and a pin or install the "quickboot" app from the Play Store. I dont know what you mean by "hanging". There are pre-rooted versions of 4.4.2 and 4.4.4 ROMs for KGL, KLD and JY to choose from on here and Malaysk's and Booroondook's ROMs from 4pda.ru (both are on here also) you are spoilt for choice when it comes to pre-rooted ROMs for this unit. If you want to change ROM just put the image on the SD card and put it on your unit.
[MTCB Android Head Units Q&A] MrRimmer:
Thanks, I'm catching up with this thread but am only up to page 600ish, and haven't started on the Russian one yet (it's tiring reading the translation!).

As for the USB DAC option - I'd like to test it but using it would mean adding an external amplifier and having to do something about mixing audio from the radio etc.

The main problem that I've been trying to deal with is the frequency-dependent 2nd and 3rd order distortion that appears at random form both Android AND MCU channels. There's one other poster who also reported the same issue. It's as if some part of the analogue signal chain is being badly overloaded.
[MTCB Android Head Units Q&A] patagonia1:
look at post 3163 for info on how to configure an USB dac. Long term goal form my would be to use an USB DAC, downside seems that it will not be able to play music from radio or DVD, only Android app´s

http://xdaforums.com/showpost.php?p=55224281&postcount=3163
[MTCB Android Head Units Q&A] agentdr8:
Since the tuner in my GS is on the fritz (lost left channel audio), I bought a usb rtl-sdr that I'll use SDR Touch with. Then all audio will be output via the Android "sys" output, which could also route over a usb dac.
[MTCB Android Head Units Q&A] ESTIMULO:
what's the data partition size 1gb, 2gb or 3gb?

thanks
[MTCB Android Head Units Q&A] typos1:
agentdr8 has a solution above using and external tuner, whats wrong with an external amp ? Or you could try changing the audio IC, the Toshiba TB929HQ, as used in the (very rare) RoadMaster versions would probably have the same pin outs, is very cheap and would PROBABLY sound better than the other audio ICs.

http://www.ebay.co.uk/itm/110913469563?_trksid=p2060778.m1438.l2649&ssPageName=STRK:MEBIDX:IT

---------- Post added at 06:53 PM ---------- Previous post was at 06:52 PM ----------

On which ROM ?
[MTCB Android Head Units Q&A] ESTIMULO:
sorry I miss quoted this post asking for data partition size to try it
[MTCB Android Head Units Q&A] leckig:
is there a way to see the picture from the rear view camera while going forward?
[MTCB Android Head Units Q&A] agentdr8:
I haven't found a way to trigger the MCU to switch to the rear view camera via software, so not unless you wire a switch into the reverse wire input.
[MTCB Android Head Units Q&A] leckig:
this is a great idea, I did not think about it. Thanks!
[MTCB Android Head Units Q&A] MrRimmer:
That amp looks rubbish if you ask me, not worth the effort of stripping the unit apart and desoldering the existing one. 21W with 10% THD isn't the sort of performance to shout about. And it wouldn't solve the problem if the distortion is further up the chain, in a buffer or preamp say. The OP who also mentioned this distortion was using an external amp so the power IC probably isn't the problem.

Yes the external amp and tuner is an option but is going to add more complication to the set-up - I'd then also have to have retain the external hands free kit I was planning on removing from the car and audio via bluetooth would not work. All seems rather complex!

---------- Post added at 08:25 PM ---------- Previous post was at 08:11 PM ----------

I did that with mine.

You run one wire from the reversing light through a power diode to the camera, then one wire from permanent live to a SPST switch. The other pole of the switch goes back to the rear of the car into power of the camera (after the diode).

I put the switch inside the stereo controls, just behind the steering wheel.
[MTCB Android Head Units Q&A] ProfessorKnox:
Yes, that's indeed unfortunately a drawback of these HUs compared to "closed" WinCE Systems and seems to be linked to the app-driven open system architecture.

(a) The apps are independent from each other and as such don't take care about each other.

(b) If an app becomes focus ("on screen") the previously running app looses focus.

Even with my navigation app (iGo) this is true, e.g. when radio app has focus (i.e. is in foreground) iGo dosn't navigate any longer. :(

From my point of view, this can only be solved by home-brewn apps, either an "integrated" radio/phone/... app or separate apps running services and interacting among each other.
[MTCB Android Head Units Q&A] comptechltd:
[MENTION=6124617]marco.lav[/MENTION],

Can you give some more details as to exactly what you did and where you did it. I definitely want to do this.

Steve
[MTCB Android Head Units Q&A] marco.lav:
depends on what you want to do,

fix reception wi fi

or send 12V to your antenna?

(Only for models of cars that have an amplified antenna)

this is my UH before fix

[IMG="wi fi before"]https://lh5.googleusercontent.com/-r1TPGxBhFHQ/VMAWLkwbtOI/AAAAAAAALIg/Qz2OfjKe-Go/w737-h553-no/20150121_221130.jpg[/IMG]

you can see a normal wire in box,

did not use any shielded cable, and especially

not have taken him out of the metal box (Faraday cage)

and welds suck

[IMG="antenna Before the fix"]https://lh3.googleusercontent.com/-VsYA6icqf2g/VMAXrFkcWII/AAAAAAAALIQ/Y0zz60DHDPU/w415-h553-no/20150121_221758.jpg[/IMG]
[MTCB Android Head Units Q&A] zorantoma:
For me Igo and Sigic navigate in background. For igo you must edit the sys.txt ,sigic has this function in settings.
[MTCB Android Head Units Q&A] marco.lav:
I believe, but I'm not sure,

that compatible webcams are those in this list,

give me confirmation for those who can do the tests.

http://www.ideasonboard.org/uvc/
[MTCB Android Head Units Q&A] exitido:
Fuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

I already buyed a Microsoft LifeCam VX-5000 on ebay and its not on these list!!!!

Thanks
[MTCB Android Head Units Q&A] comptechltd:
I'm just wanting to improve my WiFi reception.

Steve
[MTCB Android Head Units Q&A] marco.lav:
my webcam lifeCam microsoft HD 3000

works good

this cam is present in list sent from me!!

:)

---------- Post added at 11:19 PM ---------- Previous post was at 11:12 PM ----------

is required

- wire RG 174

- SMA reverse (attachment to panel)

- antenna (not present in photo )

remove the original wire and weld as photos

everything you need can be compiled into an old access point or router

Marco
[MTCB Android Head Units Q&A] comptechltd:
Oh, now I get it. You just hook the antenna to the back then, behind the dash?
[MTCB Android Head Units Q&A] marco.lav:
yes

the fact that the antenna is outside of the metal casing greatly improves the reception
[MTCB Android Head Units Q&A] dsa8310:
[Fix] 3G problems (losing connection, weak connection, no connection)

--
[MTCB Android Head Units Q&A] koimr:
Couple questions

Hi guys,

Couple more questions:

1) Every morning, I lose my SWC settings. I haven't done a big test but they basically seem to be mapped elsewhere (so Vol- becomes "Next Track", etc) and the CarService app shows the incorrect codes. What I have to do is go into the "Steering Wheel" section in Settings and reset and then redo them. Then all is fine for the rest of the day. Any ideas?

2) When I am sitting somewhere listening to music, my key is in "Acc" - when I start the car it does a mini-shutdown and comes up nice and fast but CarService and Poweramp Toast have both been killed. Is there a way to prevent that or have these apps start up after the mini-shutdown? They are set to run on boot but as this isn't a full boot I guess they never get triggered.

JY MCU 2.16 / Coudu 4.4.4 KLD v4.2
[MTCB Android Head Units Q&A] ultradj83:
Really fantastic, but still no way to run Skype.

I'll try some Skype's old versions to make sure this is not a Skype fault itself.

Anything particular that can avoid it to run on this rom?

Finally, on the MTC service, how can I reduce the speed volume?

It's set as 1, I tried to set 0.5 but it crashed, at the moment it's too strong, really unusable.

Thanks a lot!
[MTCB Android Head Units Q&A] jjdemu:
First off thanks to everyone for their hard work with these HU.

I have the kd8004 (KLYDE) radio for a 2011 prius. I developed a problem with the equalizer where it will not change, it will change change between flat, rock, custom and etc. on the screen but you can not tell any difference between them. It sounds like it is stuck rock or custom. It did work when I first got the unit for a few months then it developed this problem. I have tried different mcu's and different firmwares to no help. Just wanted to see if anyone else had this problem and/or possible troubleshooting for me to check.
[MTCB Android Head Units Q&A] Malaysk:
Yes, Skype does not work, I try out a lot of versions and none of them worked. I do not know why yet.

On the other firmware worked Skype?

I disabled this feature in the program MTCService, it still does not work properly! Program should finish.
[MTCB Android Head Units Q&A] ultradj83:
Yes with other roms it works, maybe just a problem of dpi?

I'll try to use Extreme Logcat to get app related logs...
[MTCB Android Head Units Q&A] Malaysk:
Good idea. We must try to standard resolution of 240 dpi