yashsingh1/xdaforums huggingface dataset:
[FYT Android Head Units] AP756:
I'm living in the south of Germany in an area full of valleys and hills. Joying 124N2, Software is 6.0.1 dated December, 15th (Kernel 3.14.0 also dated Dec., 15th), radio is set to Europe, baseband version dated June, 19th. The first 6 presets are set to 92,20 - 94.30 - 98,40 - 99,30 - 99,60 - 99,90 (SWR3), all other presets are not set (they are set to default 87.50, no other strong signal set!). The radio switched about 15 times on a 40km trip from one of the preset frequencies to the next best without dropout. Before switching on AF I had to do these changes manually every time the signal strength got too low.

In my recent experience this is just a "workaround" for the former priority "best station regardless of the content". The presets seem to have priority. I didn't test for different programs yet, because I'm just happy it works for me and SWR3 :).

Hope this explanation is more accurate now.
[FYT Android Head Units] surfer63:
Thank you for the clarification.

Joying/SYU still did a rubbish job, but at least is has improved slightly from what it was. We have 18 presets. If we have 3 radio stations each with 6 presets, we might see what the radio app does.

Does it take one of the preset from the current station?

Or does it simply picks the strongest preset, be it the current station or one of the others?

I'm so afraid it is the second.
[FYT Android Head Units] Shiwantha:
No, you need to access root folders. Best using root file browser to bring a copy to your PC and replace png and move the modded file back to system and set permission. I did that. I first put a grid png and uploaded and mark the outline to exactly match my car. And stretch already existed reverse line to perfectly match it.
[FYT Android Head Units] ziofester70:
Unfortunatly this workaround doesn’t work for me.

This is an autoradio without radio!!!

But remain the auto.
[FYT Android Head Units] GaryGood:
I purchased and installed the Joying JY-UM135N. AFAIK, this is identical to the JY-UM135N2 except it has only 1GB of RAM and 16GB internal storage. So far, haven't experienced any problems due to less memory. For example, plays 1080p video no problem. I have the Dec 15, 2017 ROM. Installed the JoyingRootAssistant. Thanks a million for that! Used it to install Standard Android Settings, radio mods, BT Phone app, and busybox update. Installed a heatsink and 90mm fan wired to 12V ACC lead but slowed down with a pot. For the most part, satisfied with my purchase.

I can confirm the BT Music app stutters playing music from my phone when launched from home screen. When launched using the SRC physical button, doesn't stutter. Weird. Doesn't matter much to me since I've loaded my entire music library onto a 200GB SDHC card. PowerAmp rocks, by the way.

I do have some questions. Perhaps folks can help me out.

1. Dashcam.

What is the signal type of the yellow RCA connector on the Joying harness? Is it the same as the Video In RCA yellow connector on the back of the HU, i.e. composite video? I want to connect my Rexing V1P rear cam to the HU, but unsure which connector to use. I'm pretty sure the Rexing cam is composite video NTSC. If I connect to the Video In connector, which app do I use? OTOH, Joying wiring diagram shows "12V (Reversing Light)" on the cable to the yellow RCA harness connector. WTF?

2. Reverse cam.

Which video connector will be read when the BACK signal is supplied by car? Since the Joying wiring diagram shows the dashcam connected to the harness port, that is the one that is activated? What app is used? Can I read from either/both ports without the BACK signal?

I've studied this very interesting thread: https://xdaforums.com/android-auto/...joying-intel-reverse-camera-uiserver-t3588786

Ultimately, I want to connect both rear and forward cams. I do understand from the thread above that encoding and recording are asking too much of the HU.

3. Audio Headphone Output

If I connect Audio L/R Out, does that silence the car speakers? Guessing not. Want to do this for silent headphone jack.

4. Mystery BT Microphone Setting

In advanced Car Settings, there is a "Bluetooth Microphone TyPe" (sic)

setting with two choices: "Front MIC" and "Post MIC". What is this

for? When I set to "Post MIC", bluetooth callers cannot hear me at

all.

5. Improving Microphone

I connected the external mic Joying supplied. My wife says audio is "usable but not very good". Apparently, I should cut the internal front mic lead because both the front and external mics are active. Threads say cutting the front mic lead will improve bluetooth caller audio, but there is some question about what that does to other audio input, such as Google Voice or Voice Recorder. Some people claim they work OK with the external mic; others say they had to jumper the external mic to the front mic leads. Has anybody tried cutting the internal mic lead on the JY-UM135N or JY-UM135N2?

6. USB Ports

Are the USB ports 3.0 or 2.0? Joying says they are "5.4V/2.1A".

Thanks in advance.
[FYT Android Head Units] GaryGood:
Answering my own questions. This info might be helpful to others.

1 & 2. Both of the yellow RCA video inputs accept standard composite video NTSC signals -- both the one on the harness and the one on the back of the unit, which also has nearby red and white audio inputs. I assume they will also accept PAL. The harness video input is only active when the BACK signal is applied. The HU automatically switches the screen to this input when the BACK signal is active. There are settings to control how much the volume of already-playing audio is reduced. (I set mine to 0.) I wired an SPDT switch between my car's REVERSE and ACC signals, so that the BACK signal is applied when the car is in reverse, or whenever I want. The other video input on the back of the unit is displayed when running the AUX app supplied by Joying. Unfortunately, the AUX app assumes that one wants the RCA audio inputs on the back of the unit near the video input to be used, and so it cuts out any playing music. Anybody know how to change this behavior? I want to wire a front camera to this input, but continue to play music while viewing it.

3. I connected headphones to the RCA front right and left audio outputs on the back of the unit. It did not work. I am guessing this is because these outputs are "line level", intended to input to an amplifier, so they cannot drive headphones. Someone please correct me if I'm guessing wrong. In any case, connecting something to these outputs DOES NOT silence the regular speakers connected to the harness. Can anyone suggest a way to connect headphones to the unit to permit passengers to listen to audio, while silencing the regular car speakers so as not to disturb the driver?

4. See https://xdaforums.com/android-auto/android-head-units/bluetooth-mic-type-setting-t3741394

5. I've studied all the online information I can find about the microphones and remain confused. Some claim that both the internal and external mics are active simultaneously, therefore cutting the leads of the internal mic improves quality. Others claim when one plugs in the external mic, it cuts off the internal. Its hard to tell for sure, but my experiments suggest that both mics are active. If I cut the internal mic leads, what issues will I encounter? Wish someone could clarify this for me. Should I replace the Joying-supplied external mic with a better quality mic, and if so, what would you recommend? I've got my eye on https://www.amazon.com/dp/B0751T7DLY.

6. No information.

Regards
[FYT Android Head Units] surfer63:
USB ports are 2.0

(question 1 to 5 I could not answer)
[FYT Android Head Units] Evildropbear:
Does anyone have a mirror for the latest firmware? All the joying websites are down.
[FYT Android Head Units] farmerjohn:
https://xdaforums.com/showpost.php?p=75575541&postcount=393
[FYT Android Head Units] ste2002:
It can easily be found on Youtube - search for "Joying firmware update" filtered down to 1 month.
[FYT Android Head Units] shanspidie:
My HU started cold booting everytime I turn on my car. It was working fine until I rebooted the HU as Spotify was keep crashing.

I tried hard resetting the HU and also tried installing the from the USB drive. Nothing helped.

When it boots up, it does not start with radio by default, which usually happens when I reboot it myself. I think it does not do full reboot, but does not comes back quick. It goes thru the Joying logo and then Android logos.

I have sleep enabled in the settings. Can anyone help me with it? I am on november firmware I think.

Can anyone hope me on this?
[FYT Android Head Units] nk33:
This happened to me as well. I figured its the cold weather.

When the weather was warm one day, this did not happen and it was instantly on as normal.

Tell me has the weather in your area gone cold to coincide with this happening?
[FYT Android Head Units] clinto69:
USB 3g/4g Dongle

Hi guys, has anyone ever managed to get a 3g/4g dongle working via USB? I have the Huawei 8372 and I can connect to it by wifi hotspot but I really wanted to have it direct connect with the head unit and use the mobile data network.

Has anyone managed to do it?

Thanks
[FYT Android Head Units] shanspidie:
I think your right that the weather makes the difference.

But it is the opposite here. The temperature went to 50s and I got the issue and now it is back to 20s and the issue seems to have resolved on its own. Let's see how it goes when we get summer.
[FYT Android Head Units] nk33:
When the weather became hot on the first unit i had, the screen stopped working.
[FYT Android Head Units] luciusfox:
For those of you experiencing TEMPERATURE related sleep problems, the issue is this;

When the temperature is low you have two problems;

1) The chemical reaction in the battery that makes electricity is going to happen slower, so the voltage will be lower,

2) The oil in the engine will be thicker, so it takes more current to turn it, which means that the voltage will be lower still.

If the voltage drops below some threshold, the radio shuts off.
[FYT Android Head Units] nk33:
Thought so.

Even my MPG gage is resetting to zero ever morning now… this is the coldest UK has been in years.

All good though, temps returning to normal tomorrow and rising lol
[FYT Android Head Units] luciusfox:
Don't forget that car batteries don't last forever.
[FYT Android Head Units] nk33:
its pretty new mate
[FYT Android Head Units] dlgltal:
Try Joyingauto dot com
[FYT Android Head Units] jodybgoode:
Does anybody possibly know why i dont have a glonass signal?
[FYT Android Head Units] ste2002:
Which HU do you have, is Glonass in it's specs? Not all HUs support Glonass. Joying does.

Edit: Oh, I have just noticed we are in Joying thread. Sorry, no idea why Glonass is not available. Coverage is lower then GPS though.
[FYT Android Head Units] surfer63:
Did you enable the "GPS mix" option in the Settings? Without it it will only use GPS and not Glonass.
[FYT Android Head Units] nk33:
whats so special about Glonas?

i been using normal GPS with Waze and its spot on
[FYT Android Head Units] surfer63:
There is nothing special with Glonass. It simply means that if you have bad coverage, like between high buildings or in mountainous terrain (being in a valley or a ravine), you simply have the "possibility" of finding a few extra satellites to increase precision.
[FYT Android Head Units] micdesa:
Hi Guys I nstalled the joying 6.0.1 update on my genenric sofia headunit. All it's working but there are no sound....someone could help me?
[FYT Android Head Units] nk33:
this is why i aint messed with my stereo since it works perfectly.....if it aint broke...
[FYT Android Head Units] Kaps:
How to add USB as Internal Storage in Joying head unit ?
[FYT Android Head Units] surfer63:
(Kilometers away from my unit right now)

did you try: Settings -> Storage; Click USB device -> 3-dot top-right menu-> format as internal storage?

That is how it works (should work) after 6.0.

Secondly: Are you on the standard stock ROM? In that case the crippled Joying Settings apk might not allow this.
[FYT Android Head Units] Beatwolf:
Does anyone have an idea/solution on how to be able to change tracks in Google Play Music while navigating with Maps or Waze? I don't have any steering wheel buttons. Haven't been able to find a proper solution myself so far.
[FYT Android Head Units] edit:
try this app : https://play.google.com/store/apps/details?id=com.goodmooddroid.gesturecontroldemo

You can define screen gestures with it... might work for you...
[FYT Android Head Units] nk33:
Just get Poweramp.

Hands down best audio player for android. Has absolutely everything. The equaliser is rudiculous as well, not like those fake equalisers which just change volume
[FYT Android Head Units] Beatwolf:
Thanks! will definetly try it.

I would like to use PowerAmp, problem all my music is uploaded to Google Music. But maybe I should just run everything from a 128gb sd card or such....
[FYT Android Head Units] Kaps:
Yes I am on standard stock ROM.

Can you suggest a good stable rom ?
[FYT Android Head Units] edit:
The ONLY custom ROM that's available and you can try is the one made by [MENTION=1351192]gtas[/MENTION]pec :

https://xdaforums.com/android-auto/android-head-units/rom-gtx-joying-stock-rom-2018-01-29-t3742482
[FYT Android Head Units] tegan1110:
Ok, odd question, and I'm sure it's been answered before but I can't find the answer, so here goes...

Does anyone have the CD/DVD player apk for devices with optical drives? I recently found some Old CDs with music on that isn't available for streaming, slid them into my head unit (one by one, obviously not all at once!!!) but no option to playback music from CD... Infuriating!!!

Thanks in advance!
[FYT Android Head Units] KamaL:
Hello everyone. I'm still using the stock lollipop rom (doitright's dvc cam app doesn't work in 6.0 roms), and my main compliant is with WAZE.

I use it regularly, and on each cold start in the morning , waze is stuck from my use on the previous say, and it takes some time to be able to close it properly and re-open it for a new use, which is surely not convenient.

Is there a solution for this? I was thinking to use an app that kills the WAZE app when the joying device goes to sleep mode

maybe a Tasker rule?

I'd appreciate any suggestion for this.
[FYT Android Head Units] nk33:
i use waze on this stereo everyday and never have a problem -

While in Waze - you can just press back and then it offers you the option of canceling or shtting down - just click shut down and it closes it properly

open waze in the morning should only take 5-10 seconds to load fully
[FYT Android Head Units] surfer63:
What do you mean with this? I have used doitrights (lbdroids) cam app for months on an a raspberry pi zero in combination with my unit on the 6.0 ROM.

Just for convenience I finally bought a Joying dash cam as in that case I no longer needed the rpi in the car and could use that rpi0 as night cam (with infrared) to check on marters around my house.
[FYT Android Head Units] KamaL:
I use a basic dashcam with the basic dashcam app lbdroid developed. not the one which requires rpi0 hardware. I don't want to deal with more hardware just for dashcam.

The only ROM that supports the basic dashcam app is the lollipop one. that's why I didn't upgrade the ROM.
[FYT Android Head Units] surfer63:
Please share that apk with us.

The Lbdroid's dashcam apk I know (and which can be installed from my JET apk) was specifically written to ONLY communicate to a raspberry pi with a web/dash cam, as not one single USB web/dash cam was supported after the 16 December 2016 Joying ROM apart from the two sold by Joying.

Any dashcam supported by their Joying kernel (the two I mentioned) is also supported by the Joying dashcam apk or the Trafficguard apk. As far as I know lbdroid never wrote an apk that could directly capture video from a dashcam and I was in contact with lbdroid about the apk-rpi setup (not that I did any programming though).

So please share the one you use with us.
[FYT Android Head Units] thelunchboxosu:
Hey everyone! This week my unit stopped playing audio from apps other than the terrestrial radio. Anyone else have this happen? Hoping firstly that it's not a hardware issue, and secondly that I might be able to fix it without resetting the radio back to stock.
[FYT Android Head Units] lotte67890:
I had that a while ago when using an Equalizer from my mp3 app... Loading the stock eq app solved it.
[FYT Android Head Units] thelunchboxosu:
I haven't messed with the EQ at all, I only use Google Play Music. Is there a way through JET to reinstall the stock EQ? I tried clearing the stock EQ app settings and cache and did a reboot but that didn't fix it.
[FYT Android Head Units] lotte67890:
Have you checked the amp settings in the car settings menu? It´s in the 4th tab, code is 3368 (at least mine has that)... And what happens if you try to play any mp3 file, with another app than google play music?

L
[FYT Android Head Units] thelunchboxosu:
I did have a digital amp option in the spot you mentioned, but the digital amp was switched off on tab 3. Not sure how it got toggled off, but once I toggled that on all was good again. Thanks for the awesome assistance!
[FYT Android Head Units] KamaL:
The apk is actually available in his github repo:

https://github.com/lbdroid/FFMpeg-DashCam

It is the 1.0.4 version, not the 2.0 version for rPi.

I've been using it for a long time with a simple dashcam connected to my joying headunit, and it has been working fine.

lbdroid tried to make it work on the 6.0 Joying roms, but they changed too much code so he gave up and coded the one with rPi.
[FYT Android Head Units] juniorkm7:
I have a problem that when I turn off my car the Joying stays still on. I need to turn it off with knob. However when installed few days ago the radio it was turning on and off properly with ignition. Something broke after few days and the unit stays on after ignition turned off and will not turn on automatically when engine turns on...
[FYT Android Head Units] juniorkm7:
Has anyone had the problem with ACC not making any effect? The unit works all the time. Maybe there is some setting which I don't see which makes unit reacting on ACC on/off? I have the MITO-02 adapter for rockford amplifier and connected joying harness with MITO harness
[FYT Android Head Units] Ford_OutLaw:
Not familiar with your harness. I had a similar issue of my unit always being on and it was this red wire. All I needed to do was disconnect and the unit would power down [IMG="Red Wire"]https://i.ytimg.com/vi/jJ119-ro7WI/maxresdefault.jpg[/IMG]
[FYT Android Head Units] Redbullssg:
Are you sure there isn't constant power going to the ACC wire in your harness? This wire should be hooked up to a 12v source that shuts off with the car, but stays powered in ACC mode on the ignition. Otherwise, if it gets constant power it will never shut off... Same the other way around, it can not turn on without power to it... So, if your car has to be powering it constant. There are no settings to change that.
[FYT Android Head Units] Milenco:
For lack of a better topic (and not wanting to start a topic of my own), I'll post it here:

I noticed that whenever I have Spotify running on my unit my head unit reboots when I come back after a while after I left the car. I suspect Spotify is consuming too much energy in the background, the MCU kicks in and shuts down the unit to prevent the car battery getting drained. I'm still investigating this. Do people recognise this issue? I have Tasked setup as a test this morning, to kill the Spotify app whenever the unit is switched into Airplane mode. This doesn't work however. Hoping others have encountered the same issue and found a work-around..

Another thing that I would like to see improved is an app that regulates the head unit's volume based on GPS speed. I have tried several apps for this (Speed of Sound for example) and while these work on my phone, on the head unit it doesn't, most likely due to the fact that the MCU takes care of the volume instead of the Android system itself. I have found an Xposed module for MTCD radio's but this also doesn't work for my Joying Sofia unit. Anyone here who can think of a solution to make this work?
[FYT Android Head Units] Redbullssg:
Yes, I have noticed the Spotify will cause this on my head as well.. Also have noticed that Spotify takes over everything on my Joying... Meaning, if I open PowerAmp (my preferred music player) and start the music, if I skip to next song, Spotify pauses PowerAmp and start playing, even if I shut it down before.... It does this with any other music app... GOOGLE Play Music does the same thing....
[FYT Android Head Units] jojorios:
Joying's website seems to be completely useless. Which is the latest update they released? And how can I tell which version my MCU is on (9.2 or above or 5.25 or earlier). (all it says in the MCU version in settings is JY_(NOR__90_C9_7706_5009_CAN(All)_Newlap_Amp)
[FYT Android Head Units] nk33:
whats the passcose again as well? to unlock advanced features?
[FYT Android Head Units] lotte67890:
3368
[FYT Android Head Units] nk33:
Thanks buddy!
[FYT Android Head Units] nk33:
So i have had this stereo nearly 2 years now. Near the very begining it had the issue where the screen would go blank intermitently until it just stayed blank - but the stereo was still working.

i was directed by Joying to some youtube video of soldering that needed to be done to fix the issue. i wasnt happy but it was obviously easier to get someone to do this for me than it would be to send it back and wait for them to send it back to me.

Since doing this the screen has worked fine - until this week...it is going blank intermitently again and i am sure it is only a matter of time before it goes blank fully.

Just a couple questions;

1) is it worth doing the sodlering again?

2) Have Joying got any "new & improved" versions of this unit which you guys would recommend as an upgrade to this one? Preferebly with the same connectors at the back so that all i have to do is take this one out and put the new one in...preferably faster processor too with better cooling and not this issue with the screen

thanks in advance for any advice
[FYT Android Head Units] R4m80:
All Joying head units use the same connector, so any Joying head unit will plug straight into your current harness. Joying just released new head units with Android 8.1, new CPU's and 4G sim slot integrated in the head unit. Have a look at their website.
[FYT Android Head Units] gustden:
Same issue here. After about 1 year, the screen went blank, but was still responsive. Under high magnification, it was very easy to see the "why" it failed. It was the worst soldering I had ever seen on a circuit board. I re-soldered just about everything on the board while I had it out to avoid future issues. After ~2 years it died again, this time it died for good, even with re-soldering it again.

I contacted Joying and they did offer me a 30% discount on a new unit (US-JY-UO135P4), which looks identical except for a faster processor and more memory. I am very hesitant to buy another Joying... A decent head unit should last more than 2 years.
[FYT Android Head Units] surfer63:
Same here. I now have a PX5 (may 2018) which (still) functions fine, but I had a Joying Sofia 3GR which I still use "on the bench" occasionally for testing. I have now connected a mouse and keyboard to the usb connections as the screen gets worse in an increasing rate, both visible and "touch wise" and already for 5-6 months. The bottom half simply does not react. I received that one in January 2017. So I used it 1 year 5 months in my car and since then once a week (or so) on the bench. I hope the PX5 wil last much longer.

Looking inside the units the soldering is indeed terribly bad, both in the Sofia 3GR as well as in the PX5.

However, I have no other brand Chinese unit to compare with: Are they all this bad?

I guess my new car (no plans yet) will have a builtin factory unit: Not so customizable, but much higher quality.