yashsingh1/xdaforums huggingface dataset:
[MTCB Android Head Units Q&A] kaween:
Heh, thanks for the tip ! While I don't need the Mic amp myself for my handsfree unit, The're loads of other situations where I needed such a low cost amp; most of the times I'd either cobble up something myself or I'd used some Velleman-type of kit, I never considered looking at the Arduino-kits for that !

---------- Post added at 12:13 AM ---------- Previous post was at 12:07 AM ----------

I remember someone once told me there's a possible offset issue depending on what type of maps you're using.

I know Igo can interprete Tomtom-based maps and (I think) Teleatlas maps. Somebody once told me that if the wrong config file/maps are used, as serious offset of something between 50 and 100 meters could be the result.

For the life of it I can't find it exactly anymore, but it was a discussion between me and a user on the AN21-U forum.

To exclude another problem source, check if the problem is limited to Igo or if you see a similar offset using a free nav-app (Google maps, Waze, Here ...)
[MTCB Android Head Units Q&A] markcm:
No I have not. My iPhones stream BT vey well to other devices but that is a good idea for trouble shooting.
[MTCB Android Head Units Q&A] mike.s:
Just the opposite. Higher resolution means less physical space.

Think of it this way - given two 800x640 displays, the one with higher dpi would be physically smaller. My phone is 1920x1080, and the display is smaller than one of these head units. The dpi is much higher. UI elements tend to be adjusted so they're a fixed physical size.
[MTCB Android Head Units Q&A] grahamwright1:
Yes it is
[MTCB Android Head Units Q&A] Reptile-X:
Thanks :D I just tested for an hour and it still works, IC problem is solved.

Now Poweramp skips numbers when I hit next or previous buttons on the unit, I had this problem before, I believe I solved with a Xposed module but I can’t remember which one, well I was tired after today, the modules are still there, I had couple updates in Xposed maybe thats the problem, I have to look in to that tomorrow. Or someone has maybe the golden tip for me here? :laugh:
[MTCB Android Head Units Q&A] zooly57:
Stopping FM Radio Player via Tasker (stop playing music)

Hello,

I was wondering if you found a solution to this problem? I am familiar with tasker and successfully setup tasks to kill all running music apps except the one that is active. The problem is all the 3rd party apps work as expected and close when killed, but when the MTCRadio app is killed the FM keeps running and doesn't shut off just because the app is closed. I want the FM music to shut off when another music player is activated.

Thanks!

Zooly
[MTCB Android Head Units Q&A] agentdr8:
I think you're probably thinking of Car Service, which has a key repeat filter. I think Petrow's Headunit Service does the same though (I could be wrong; I use neither).
[MTCB Android Head Units Q&A] Reptile-X:
Yes indeed, but Car Service was running at that time, Poweramp had a update too, so I am not sure what was happening but it is working now and I didn’t do anything except booting the head unit, maybe it didn’t start up properly first couple times, head unit stayed on my workbench couple days waiting on its new amplifier chip, maybe that was the issue. I keep monitoring it, if it happens again I will reinstall Car Service.

Thanks for the heads up :)
[MTCB Android Head Units Q&A] jeroensteinvoorte:
I had exactly the same problem. You are probably running 4.2.2 image. From the downloading image you can see the completely blue bar. It should be only blue within the country you are downloading. I did an upgrade to a recent 4.4.4 image and the download problems where gone and also interface problems where gone.

I was wrong about the downloading of the maps / wifi problem. I still have the same problem with my unit. maby its a power problem or heat problem in the wifi chip.

Ik had exact het zelfde probleem. Na ongeveer 43% van de benelux kaart stopte de wifi. Daarna hield het op. Na het installeren van een 4.4.4 image was dat probleem verholpen. Ook hoort alleen in het plaatje van Europa of de benelux blauw te worden en niet een heel vierkant vlak. Als het je lukt om de kaarten binnen te krijgen zullen sommige pijlen en de snelwegnummers niet goed weergegeven worden.
[MTCB Android Head Units Q&A] lamjanus:
Flashed new mcu 2.55 KGL4 from 2.47. Lost button light and radio reception is a little worse. How to fix the buttons? I can change colors in settings but after that its not working.
[MTCB Android Head Units Q&A] OneCheekyDevil:
Just flash back your old MCU. The Russian website said not all models were covered by each new MCU updates.
[MTCB Android Head Units Q&A] skoobee:
I may not have a recent enough one either as I can't see the sleep setting, where is the setting for sleep located?

Skooby
[MTCB Android Head Units Q&A] Waldorfer:
Hi,

iGo worked perfect with the original rom so I wonder what the difference is. GPS ist working perfect. Will check the configs.
[MTCB Android Head Units Q&A] OnkelDeffe:
ELA-Link app

Hi, I've tested the ELA Link app, which is pre-installed on my Erisin 9700A and it works very nice with my Sony Z3 compact. Is there any way to copy / backup this app ? (I did not found it with file explorer) I'm afraid to loose this app then installing the RK3188 quad card...

And another question too: could I install the ELA Link app on a tablet so that I could use it as a "remote" to control the RNS? (in direct sunshine you can't see anything on the screen, so I could hook up a 7" tablet in another position to see navigation card f.e.)

Thx

Detlev
[MTCB Android Head Units Q&A] jeroensteinvoorte:
To fix the radio reception I ordered an antenna amplifier at www.dx.com shipment is free, but takes a while.

The radio reception is now as good or even better than the stock radio.
[MTCB Android Head Units Q&A] Enc0der:
Hi,

I downloaded this file and also the original file from 4pda, and they are different.

mcu_jy_259_patched.zip => mcu.img file is 56,196 bytes

MCU_JY_2.59_Sleep_Musik.rar => mcu.img file is 56,202 bytes

I thought it was suppose to be the same files...

What is the difference?
[MTCB Android Head Units Q&A] kaween:
Hm. I suspect I got a dud then 2 years ago as reception was horrible when using that same unit. Good to know it actually does work normally.

But when I look at this units' comments, I recognize a lot of the complaints : yes it amplifies ... everything. including noise and interference according to the buyers' feedback.

Did you not notice a substantial increase in interference and signal noise in your case ?
[MTCB Android Head Units Q&A] Enc0der:
This sounds like a great idea to fix the low mic volume on BT phone calls!

Can you please explain in more details how did you connect this module to between the radio and the external mic?

What do you mean by "remove the micro and use only the amplifier part"? Where exactly did you take the USB power from? from the headunit? can I use a regular "USB car charger" with some usb cable to get the 5v output?

Can I use this module's built-in mic as the actual microphone? Did you try this?

thanks!
[MTCB Android Head Units Q&A] kaween:
There should be a new "extra" entry visable, in the vicinity of the "amplifier" entry (of the top of my head).
[MTCB Android Head Units Q&A] Reptile-X:
Hi Jeroen, I am using TomTom GO since it came out, the Benelux map was pain to download back then, I did it through GPRS because my WIFI was dropping out every time, like you said I miss couple things while navigating with it, like road board and signs. The old TomTom didn’t have that issue.

I was able to update the Benelux map now without hassle, now my WIFI drops out after downloading around 840MB. I was reporting that because I installed a proper WIFI antenna, removed the wire “so called antenna” from the head unit and installed an antenna connector, and I have a small WIFI antenna on my front window. Like you said the problem is not the antenna but the WIFI chip itself but antenna helps downloading faster and you can download more before it drops out.
[MTCB Android Head Units Q&A] kosovac_:
Problem with steering wheels button

when I used original BMW GPS did everything. After I switched with HuiFei not working steering wheels button anymore. any tips? When I go to settings and try to program the them they do not respond at all.

Tnx.
[MTCB Android Head Units Q&A] kaween:
He undoubtable means he unsoldered the mic that sits on the amplifier board and connected his external mic to it instead.

He probably took usb power from one of the usb ports of his unit and turned it down with two diodes to keep under 5V. A regular usb charger will do the same thing. Or you use a step-downer like this http://www.benl.ebay.be/itm/LM2596-...693?pt=LH_DefaultDomain_3&hash=item19fe9f79e5 which allows for some finetuning if need be.

You could use this module to amplify the internal mic, but you'd have to do the same kind of trick : desoldering the mic that's on the pcb and connect the internal mic to it, add power, and connect the output of the board to the soldering pads where the internal mic is connected originally.
[MTCB Android Head Units Q&A] lamjanus:
Thanks. But the sound is much netter with the new mcu. I have an older 444 ROM so no sleep settings. Can that be a problem for car battery?
[MTCB Android Head Units Q&A] Enc0der:
Thanks for the info :)

About the internal mic, I was talking about the mic that sits on the amplifier board, so I won't have to disconnect it and then connect my external mic to it - just use the already-connected mic that comes with this amplifier = use this amplifier as my "external mic" and place it somewhere in the dashboard.

But now that you mentioned it, maybe amplifying the HU's built-in internal mic is actually an even better idea... For me the internal mic sound just as good as the external mic (and also as low volume as the external mic...), so maybe I could keep my dashboard clean without any external mic.. On the other hard, it will force me to open the unit and I prefer to avoid that.
[MTCB Android Head Units Q&A] mike.s:
Most of those things aren't booster amplifiers, but power injectors. Some cars come with amplified antennas, and the stock head unit provides the power to the antenna over the cable. When you change head units, the antenna doesn't get power, and the radio doesn't work well. These things which are sold as "booster amplifiers," often are just simple power injectors and you'll only see a performance boost if your car has an amplified antenna or if you're subject to the placebo effect.
[MTCB Android Head Units Q&A] maverick_37:
"Sounds" interesting to resolve the issue with mic this way.

Also would like to have a bit more details before venturing this modification.

Get constant complaints during calling that the converstaions are to soft and breaking up during conversation, probably due to noise cancelation during the call.

If I understand correct, you can do this with the external mic outside the unit?

Does this also mean that you don't have to take out capacitor C102 for this in the unit?

Can somebody clarify this, as it is not my profession as an electrical engineer, I need some guidance in electronics.

Don't mind opening the unit if need be.

Thanks for the reply
[MTCB Android Head Units Q&A] kaween:
I know but no, the said 208 isn't a power injector or "phantom power injector" as we call it over here which is meant to feed the build-in active amp found on quite a lot of cars these days.

It does have an amplifier chip inside and this is really a broad band FM signal amplifier - unlike the injectors which consist of just a passive LC or RC circuit and a diode (or two) thrown in.

How do I know ? Because I opened mine up and checked its inards after coming to the conclusion that the broadband amplification amplified everything including static, rendering the device useless as suddenly the car radio I used it on didn't find just 5 FM stations in AF mode, but HUNDERDS (all static, of course). :D

So I went ahead and I tried to tone down the amplification somewhat, but I messed up opening the glued-in pcb when trying to open the device.

The post-mortem was still interesting though.

---------- Post added at 04:26 PM ---------- Previous post was at 04:16 PM ----------

No. Ideally, you need to uncouple the mics. Running an external mic on these units without opening that jumper (because that's what it is, really) causes 2 mics to run in parallel.

No matter what you do to your signal, that's always crap. I'd be highly surprised if you'd get a good result with such a setup, no matter how much you'd amplifly the mic signal;

I've ordered one of these thingies and if the OP doesn't comment any further, I'll make a small "how to" and post it here after receiving it if there's a need for that.

Ah, and these units have no noise cancelation at all. There's no DSP processor, no comparative/wheighted dual mic setup or whatever. And yes, the OP has used it to amplify the external mic although theoretically, you could do this to the internal mic too.
[MTCB Android Head Units Q&A] doctorman:
some antennas need a power supply and the Head units we get does not have the correct harness to remap the antenna power so you get poor signal, your signal amplifier just provides the power back to it. this will not help people who already have the correct harness and get power to their antenna.

---------- Post added at 10:27 AM ---------- Previous post was at 10:26 AM ----------

you do see that one is RAR and one is ZIP compressed, and of course it will have different size.
[MTCB Android Head Units Q&A] Enc0der:
I'm not an idiot, I said I'm talking about the extracted mcu.img file....
[MTCB Android Head Units Q&A] doctorman:
sorry my bad for misunderstanding
[MTCB Android Head Units Q&A] kaween:
I understand that, but depending on your headunit's design, you might not need to open it "really", just removing the front/facia whould be enough. On my JY, that means just unscrewing 4 black screws on either side of the front, and the complete front comes off. The internal mic is just connected by 2 small wires on the front PCB : so you'd have to unsolder those 2 lines, solder them on the amplifier-board and solder the output of the amp board to the 2 solder pads on the front. Should be very easy to do, in worst case you'd have to extend the existing wires of the internal mic to get to the input of the amp board.

The unit itself (main pcb, cpu, the works) would remain closed, and no inidication whatever that you've openend it -apart from the obvious mic mod of course-.

I might try to do this myself, just to see if it works and what the results are. I ordered 5 of those amp boards, so I'll be able to play a bit with them anyhow.

---------- Post added at 04:37 PM ---------- Previous post was at 04:32 PM ----------

Well actually it MIGHT help them, as said, the thing he posted is NOT a power injector but a "honest broad band signal amp". It's just not a very good one in my experience, so I'm curious if I simply had a bad one, or if the design of the amp has changed since then.

---------- Post added at 04:41 PM ---------- Previous post was at 04:37 PM ----------

Good question and never noticed that. Honestly, I think Dark Leo & Co are able to answer that question. I've used the first one (patched.zip) and the Sleep is there and the sound has altered so a more clear rendition, mostly noticable when using the radio tuner. I presume the sound difference is the result of the patch, but as I haven't tried the untouched 259 I can't say for sure.
[MTCB Android Head Units Q&A] markcm:
I think It depends on which ROM you are using. I updated my MCU which provides the ode function needed in the background and did not see the settings for sleep until after I updated with Malaysk's latest ROM.

The sleep settings on mine are found in the last section of settings called "CAR" and then "Extra Settings"
[MTCB Android Head Units Q&A] jeroensteinvoorte:
I have a 50Mbit Internet connection and a wifi accespoint in the carport where the car is parked. Still failed to download the 5 gig of maps. I opened the unit and removed the DVD drive. Then I booted the unit and started the download again. I noticed the WiFi chip got very hot. So I started blowing over the WiFi chip to cool it down.

After blowing for 20 to 30 minutes over the chip de maps where completely downloaded. So now I am considering installing a fan to generate an airflow over the WiFi chip and the rk3066.

---------- Post added at 02:57 PM ---------- Previous post was at 02:51 PM ----------

My HU wasn't able to find radio stations by itself. Now it finds al the stations with no problem. Didn't hear static and other noise. But I haven't driven around yet because I am busy tackling the WiFi / maps download problem.

It was a very productive day today.
[MTCB Android Head Units Q&A] kaween:
There is no consider. Only do. :) *kouch*

I'm surprised the wifi chip runs that hot, but after reading that, I'm double pleased I mounted that fan in my unit. MIGHT explain why I didn't have any issues with wifi on my modded JY unit.
[MTCB Android Head Units Q&A] jrgalang:
Hi all, this is a last ditch effort to not having to ship my head unit back from the seller in China. Unit is a Klyde audio running 150113 together with its accompany MCU and I'm experiencing the following issue:

1) When I try turning on the unit, it just keeps showing the "Navigation System" boot image prior to the boot animation and keeps rebooting to that same screen

2) Intriguingly, the issue above does not happen if my laptop is connected to the front USB, or if I simply attach a powerbank to the front USB - I can manage to get Android to boot with the powerbank connected

Now for obvious reasons, I do not wish to have wires dangling from my head unit simply for it to properly boot. As such, can anyone provide any idea as to how this can be resolved? I suspect that the voltage requirements of the unit may be needy, and I'm open to the option of potentially underclocking the RK3066 chip just so it will boot without having additional current flow from the front USB. But then again, I'm not entirely certain that it is solely voltage related, and that it's the added voltage coming from the front USB that's even making it work... so if anyone can provide a better, technical insight as to why this can possibly be happening before I ship this back, please let me know. I'll highly appreciate any inputs. Thanks!

Btw, wirings have all been triple-checked already, including car battery voltage.
[MTCB Android Head Units Q&A] jmcnown:
2 din Android no sound on the radio apk

hello everyone i am new to this site love every bit helped allot.

everything was working grate but once in a blue moon the fm would cut out no sound just thought might me a dead spot?

but now the radio stopped work all together tried to reset to factory re install the mcu but cant find the right firmware to update (will not take the update)

try to update system but shows Update Start.... Update end....

tryed to re install the radio akp still nothing shows every station in ST once you stop moving the nob but i know nothing is on that station but still shows ST the RDS/AS does not work please help!!!! contacted the seller from eBay but he sent the wrong updates i am waiting for there tec team

i cant post the youtube video since im new

here is the title for the video..

android 2 din no sound from fm radio

jasmes mcnown is the owner
[MTCB Android Head Units Q&A] maverick_37:
Hi kaween,

Definitely interested in the tutorial from you, I ordered also the amplifier for the mic.

At this point everything is worth a try to get a better quality than standard.

I have a kgl unit so when it is done I will post some photos too.

Also I want to improve the signal from the WiFi by building an external antenna at the back.
[MTCB Android Head Units Q&A] jrgalang:
Try going to the factory settings menu and change the Radio config (mine has TDAXXXX among other options), keep restarting after changing these settings and see what works.
[MTCB Android Head Units Q&A] manicuspanicus:
I have just updated my kgl to the latest malaysk rom and modified mcu with sleep option. Everything works as it should, install recovery builder does what I need the only weird behaviour I have is from dailyroads voyager. When the unit wakes from sleep the program crushes and gives a message that it cannot start. I'm not sure if it is a settings issue from inside dailyroads or something to do with the sleep process. We shall see.

Also today I have found a burned pixel on my screen. Not a big deal but kind of sad..... lol

Στάλθηκε από το GT-I9505 μου χρησιμοποιώντας Tapatalk
[MTCB Android Head Units Q&A] agentdr8:
You also need a newer 4.4.4 rom that has the sleep setting. Any of the malaysk roms from the last few weeks should be fine (look at the description to see if it lists sleep).

That's rather bizarre. If you're not opposed to flashing a new rom, I'd give that a try first.
[MTCB Android Head Units Q&A] devin2:
Hi

1- you can use this module directly as actual external mic...

For the power supply you can use a usb charger that have 5v output ( I made this, but no more than 5v ... ) or use a 5v directly from the HU

More Easy to use a 5v usb adaptator.

It's ok but for me I prefer use the original external mic that is put in the middle of my Steering Wheel

2- I remove the mic from the electronic board and I connect at the same place the wire of the original external mic from my HU.

---------- Post added at 04:45 PM ---------- Previous post was at 04:43 PM ----------

It' s absolutly tha I made !!!
[MTCB Android Head Units Q&A] jmcnown:
thanks for the fast replay.

i have changed the model and still the same thing no am or fm radio

i have never found the firmware that works with this unit.
[MTCB Android Head Units Q&A] jrgalang:
It actually is... And have been scratching my head all day figuring out why it won't boot without a supply coming from front USB. I'm open to anything at the moment, and will try Malaysk' latest ROM plus MCU
[MTCB Android Head Units Q&A] Waldorfer:
F*** It was a cabling problem... Solved...

---------- Post added at 07:49 PM ---------- Previous post was at 07:45 PM ----------

Had the same problem. MCU 2.55_MusiK solved it plus choosing the correct radio.

You could use the original MCU from the manufacture plus 4.4.4. rom instead
[MTCB Android Head Units Q&A] jeroensteinvoorte:
Cooling down the WiFi chip should solve your problem. I think the WiFi chip turns of the 2.4GHz radio when the chip becomes to hot.

I'm going to design a piece which will direct the airflow directly to the WiFi chip and the RK3066 chip. If it is ready I will retry downloading the Western Europe map.
[MTCB Android Head Units Q&A] DjCalvin:
Sweet mama yes they do have a noticeable difference.
[MTCB Android Head Units Q&A] eastberkshirecustoms:
Ya know, this could be one reason why the manufacturers are using such a minuscule antenna, to limit data transfer and keep the internal temps down.... time to add more cooling
[MTCB Android Head Units Q&A] jmcnown:
the MCU is original. i installed the same MCU after the issue started the files where giving to me by the ebay seller.

but the firmware would not update.
[MTCB Android Head Units Q&A] clearchris:
I havent encountered this myself with this unit, but your symptoms make me suspicious that you have a stuck button. Push all the buttons, feel them for anything unusual. Push them and give them a gentle tilt in different directions to try and release a stuck button.

---------- Post added at 07:55 PM ---------- Previous post was at 07:13 PM ----------

Eastberkshirecustoms:

I have attached a sizeable antenna to my KLD. Havent had any wifi problems.

Now I dont know much about antenna theory, but I do know that in certain cases a small antenna can cause problems, at least in CBs. The energy that the antenna is unable to radiate can get reflected back into the unit. So a larger antenna (or technically one better tuned to the frequency) could result in a cooler chip.