yashsingh1/xdaforums huggingface dataset:
[Android Head-Units] Skratchuk:
Ah right so i need a separate wire just to wire in to the reverse wire from a 12v as an example to get vision! I think I understand. Thanks again I will try again mate. Appreciate the help. ?
[Android Head-Units] kaween:
YESYESYESYESYES. :D That seperate extra wire is your "camera switch", it is the "wake up call line" that gives your AN21 a kick under the butt. Your AN21-U is absolutly clueless about the status of the Camera input line when you put your car in reverse if this line isn't connected. It can not differentiate between a situation where there would be an image on the camera input or not.

It is just "too stupid to look at the camera input". It needs help. THAT is what the extra line is for.

When the AN21 sees a 12V signal, it is as if the Reverse Camera shouts at the AN21 saying "hey you stupid droid there ! I'm active NOW and I'm outputting an image to you, now bloody LOOK at me and switch yourself to the camera input".

The AN21 will even do this without being switched on ! Even in switched off position, when your car goes into reverse and the ignition is on (well yeah, there has to be power to the system ...) that control line will FORCE the AN21 to show the camera image, even if the AN21 has not booted or wasn't even switched on.
[Android Head-Units] TheSSJ:
kaween, it seems you have a holy patience :D No offense to anyone, though :)
[Android Head-Units] Skratchuk:
Wicked mate thanks ever so much i have got it! only problem is i have no display unless its in reverse or i disconnect the brown reverse wire. I could just drive in reverse everywhere haha ?
[Android Head-Units] kaween:
I know. With exception of the S100/S150 series, all android units I've seen and played with so far do not permit software-based access to the rear-view camera. It's really a hardware "line gets 12V and then you seen your reverse" kind of thing. There's no software access to it.

But if you really want, you COULD add a little circuit with a switch and a diode to force reverse camera capability at the flick of a switch, a sort of manual override of sorts if you will.

It is this idea that was used by Roystervi in his "low cost 360° camera" setup.

[MENTION=2388665]TheSSJ[/MENTION] : You know why ? Because I know myself. I sometimes takes ages till I understand something. Afterwards I'm ready to kick myself for not having understood it earlier. I'm pretty fast with technical stuff. I'm REALLY slow when it comes to understanding people and their motivations.

Hence I know how nice it is if somebody is willing to go the extra mile to help.

That, and the fact I actually LIKE to help people, and it feels like a personal failure if it doesn't succeed. :victory:
[Android Head-Units] Skratchuk:
Sorry might not of explained it very well. I now have lovated the correct wire which is brown from the back of the Android but when I connect it to a 12v all i have is a black screen (still have sound) unless i put it in to reverse gear then i see the camera or i disconnect the reverse wire (brown) from the 12v then i can see the interface again.
[Android Head-Units] kaween:
..... no that is perfectly normal if you "just put the brown wire to your 12V".

What happens now is : you connect the brown wire to an arbitrary 12V, and the AN21 sees this as the command to look at the video input for the reverse camera so it switches to the rear view.

But because you have NOT put your car in reverse, the CAMERA itself does NOT receive any power, so the video remains black.

Then you put the car in reverse -> 12V goes to the camera, and it becomes active, your AN21 shows the video.

In order to make this work automatically, that brown wire must not be "just hooked up to no-matter-which 12V". It must be connected to the SAME 12V that ONLY will give you a 12V when your car is put in reverse. The easiest way to do that is to hook this to the wire that responsible for your Reverse light to swich on, so that there's only 12V on that line whenever your reverse light is ON. And yes, that means that you will have to run that wire all the way to the back of your car, and connect it to the SAME voltage where you are powering your Camera from.

We're getting there. I'm sure. :laugh:
[Android Head-Units] Skratchuk:
I have connected it to the same 12v as the stereo so should be fine
[Android Head-Units] kaween:
Nope. It does not. You are missing the point of the brown wire.

When you put that brown wire to the same 12V as the stereo, that brown wire 12V is "always on".

So bascially you are now telling your AN21 : HEY, LOOK AT THE REVERSE CAM LINE ! ALL THE TIME !

That is NOT the purpose of this brown wire. That brown wire is meant to ONLY receive 12V when you put your car in REVERSE. Or better said, it should only get 12V when your reverse light is ON.

The only way you can get your AN21 to automatically switch to the reverse cam in the correct manner, is making sure that brown wire ONLY receives 12V when your car is in reverse. So you will have to EXTEND that brown wire and run it all the way to the BACK of your car, and connect it to the same 12V source of your reverse cam.

*by this time, I'd LOVE to have a pair of virtual hands and do it for you* ;)
[Android Head-Units] Skratchuk:
Haha I understand now (took me a while) thanks for your help once again. ?
[Android Head-Units] gefi:
Interesting , i asked only cause last night i was reading 4pda and a guy mentioned that it was API level 19 ... And u know , this got me thinking ... but hey , thanks for clearing things up .
[Android Head-Units] EvanKelly6:
Hi guys, new here so bare with me. Not sure this is the place to post this but just wanted to ask something. I have just purchased an android radio and I've read that they can cause severe battery drain in the car. I drive a 2005 Volkswagen Golf. Is this true, and if so, how do you prevent it? This is the radio I bought.

ttp://m.dhgate.com/product/product/8-inch-2-din-android-4-4-car-dvd-video-player/233721255.html/233721255.html

Any help welcome!
[Android Head-Units] EvanKelly6:
Thanks for that! So what you're saying is that it should be okay if I just plug and play like I'm supposed to? So I'll need the ignition on for the radio to work and I'll manualy have to switch it on/off? Also, what's the purpose of the canbus box that's supplied with the unit? Do I need it?
[Android Head-Units] kaween:
Depending on make, model and year of the car, your SWC controls for example COULD run over Canbus. Or your dashboard MAY have the ability to show radio info like station name ect ect. Or it COULD be used to sense door sensors, A/C status ect ect.

If the box is there and you can hook it up : do so. I've never owned a Canbus - equiped car, so I'm not going to say that much about it.

And normally the seller will have made sure your wire harness is done correctly, so to avoid issues, just hook it up like you receive it and check if it acts correctly. If there's something wrong, contact the seller first, don't start to mess with the cables if you're not 100% sure what you're doing.
[Android Head-Units] Skratchuk:
You are a top man, finally undestand how it works and finally got it working ? thank you very much for your help once again ?
[Android Head-Units] EvanKelly6:
Thanks for that. I'll just hook it all up and see what happens. I don't really want to fiddle too much with it in case something goes badly wrong!
[Android Head-Units] kaween:
No problem. Glad you got it sorted out. Now make sure you don't bump into something. :good:

On one of our previous cars, my wife had a front parking sensor. She STILL scraped a part of the frontside of the car against a small wall.

When I asked her about the sensor alarm and why it apparantly hadn't worked, she replied "oh yeah, there was something beeping but I didn't know what it was ...." :silly:

And here's the kicker : compared to me, SHE's the smart one here.
[Android Head-Units] roystervi:
A little note:.. I post a video last week adding 4 camera to my unit..

I can speak about my unit and not all...from the camera I can not connect the ground wire..The GROUND wire from the camera does nothing if I connect it I will get a black screen. I only connect the red wire coming from the camera...I am guessing the outer shield on the RCA is the ground to the CAMERA. .I have install 2 of these unit into cars and have install 4 camera to my unit.. I just cut the black wire from the cam short and tape it off..

some might have the black to ground and its working fine but the black to ground does nothing.. if you removed the black from ground the cam will still work fine..because the outer shield from the RCA is grounded to the car unit and is giving the camera its ground..
[Android Head-Units] kaween:
Yes. Normally, the RCA cable shield is indeed grounded, and the power part of the camera SHOULD be internally connected to that same line.

So the moment you hook it up to your AN21 AND your AN21 is grounded, the groundconnection is okay.

But counting on this is simply bad practice. I'm not going to argue about this : I'm glad it works for you and I believe you. In fact, it is _normal_ that it will work as long as nothing goes wrong with the shielding of the RCA.

But as a Electronics Engineer with 30+ years of experience, I can only say you do NOT want to know what kind of spooky issues you can encounter caused by a ground issue.

Especially in car electronics. I've seen power lines which you'd expect to give 12V go down to 6V and stuff like that. ESPECIALLY in cars with "negative logic", where the manufacturer chooses NOT to switch stuff by means of switching the positive 12V POWER line but switches by insulating the GROUND connection out of a connection (and this isn't as uncommon as you might think), stuff can become really hairy really fast.

So if anyhow possible, always connect the grounds of all your devices. Failure to do so can cause a world of grief. With a common car there's about a mile (not joking) worth of internal wiring inside, and no easy access when things go south.

You do NOT want to start looking for problems by taking shortcuts.
[Android Head-Units] roystervi:
Like I said I can not talk for all units but as I said in my post I can speak for mines and the one I installed... the 1st time I setup my all I got was a black screen without no vid.. Over 18 years of Navy electrician EM2 and CE2 along with electronics tech for 6years.. I know the value of pos and neg. grounding from the cam black or the RCA is a common ground.... The fact that the RCA is ground is bad due to if you have a pos to ground on the unit it will destroy you cam if its on or blew the unit.. that is why I under amp my unit .. The unit cam are asking to be double ground and choosing one will not effect the cam or unit in no way...
[Android Head-Units] roystervi:
hummer

I have a friend who has a hummer and he like to install an android unit because his stock radio is acting up + our radio is way better than all stock radio..

So question:..Is anyone has an android radio install, if you do can you please provide a link or pic of the unit and size of the unit... I attach a info he gave me

Thanks in Advance
[Android Head-Units] kaween:
Have not been able to find a specific model for a Hummer.

However, you may try and contact "Boodro1" (http://xdaforums.com/showthread.php?p=60215861#post60215861 ) as he reports some experience with an aftermaket Android unit in his Hummer in a very recent post. Also mentions issues/solutions for the SWC, so you might want to give that guy a call.

Not much to go on, but maybe it can point you in the right direction : even if you don't want to use a Huifei, size, type and model of the used unit there will help you finding a match that is AN21-U if you so desire.
[Android Head-Units] Kidmet:
Be careful of cheap ebay ones. I used one and it fried the whole deck. i won't use USB OBD anymore. I'm too scared. I'll live without Torque.
[Android Head-Units] gefi:
Seller replied mate , no luck for me ... Any other thoughts ? Tried writing to several other sellers too but everytime the same answer , "sorry we don't sell this part"... :(
[Android Head-Units] MoonPie2000:
MCU File

I recently received an incorrect MCU update file from the company I purchased my radio from :( and as expected any MCU functions are not working. Also mysteriously I have not recieved any replies to my request to send the correct MCU file :mad: so can someone please help me! I need MCU file 4.3.10.1-1-10-610101. From my reading and experience it appears that the last set of numbers (-10-610101) are important so even if someone had a older version but with the same numbers that might help. If anyone has any info about how to interpret the numbers that would possible help also. And one more question; maybe I have just been lucky but as I flash different versions to try to get functionality back is there any chance of permeate damage if I flash a 'wrong' MCU file? Thanks for everyone's help. :)
[Android Head-Units] kaween:
[MENTION=2309720]MoonPie2000[/MENTION] :

... forum hobo slithers in, waves file, disappears into the background ... :angel:

[MENTION=4782907]gefi[/MENTION] : I'll see what I can do. No promisses.
[Android Head-Units] j2gifted:
Hey all,

Im looking to do a full format of my radio using the files provided on the Yandex site.

Im not exactly sure how to do it though. Is it the same as when I upgraded to 2.8.8?

Also, there are 2 separate file folders that say "full format". Do I use all of them, or just certain ones?

Lastly, right now im on 2.8.8 rooted. What firmware will I have after a full format? Should I expect any adverse effects?

ETA:

I've been searching through thebthread, and I read that others that have done a full format lost their DVD function. Is this still true?
[Android Head-Units] kaween:
The "dvdloss" thing is an issues with a certain system version. Just like there's a system version that will kill your gps, or even brick your unit. You know the worst part ? Those system versions are stated on this site, with a HUGE "thisfirmwarewillkillyourgps" or something as password ... but nobody really reads so it would seem.

Anyhow : read http://xdaforums.com/showthread.php?p=60200098&highlight=full+format#post60200098 , and if need be contact that forum member.

I do not comment on stuff I've not done myself. When I say "that and that works or doesn't", it is because I KNOW it is like that because I've DONE it myself.

Stuff I don't have done myself, I only refer to. :)
[Android Head-Units] j2gifted:
Ok thanks, I'm going to read all of that now.
[Android Head-Units] j2gifted:
[MENTION=4736782]kaween[/MENTION] [MENTION=2388665]TheSSJ[/MENTION]

I've done the factory wipe with the files from Yandex and tested it out, and the problem still persists.

I also wiped it again and went back to stock 2.7.4 since ORIGINALLY thats what I had before the problem randomly started. No luck with that either.

All I know is this.

1. If I install or uninstall an app from the play store, wifi will turn blue and gmail will start syncing until I restart the radio.

2. If I uninstall the google play updates, the wifi will stay blue and gmail will sync even after a restart of the radio..

3. I also found out today that if I uninstall google play services, wifi will go blue and stay blue... but gmail obviously won't work without Google play services.

All of this happens no matter what firmware version I'm running.

I've been googling and searching the forums and I came across one other person with android that has a similar problem here http://forums.androidcentral.com/as...grey-after-updating-google-play-services.html

...but its not a android radio.

Idk what to do.

Also, my hulu plus app has stopped working... it will open, play an ad, but buffer and never play the show. Anyone else having this problem? HBO go isnt playing videos either.
[Android Head-Units] kaween:
I honestly have no idea.

I did some digging and I've come across similar issues, but those were either related to some CM build, or because the user had installed some type of market helper. In all cases, the solution was to either fall back to an older build or deinstall the offending apk. But your situation is quite different.

For the time being, the only thing I can advise (and yes I know this is no solution) is simply to block the automatic updates in playstore after reinstalling and see if you have a viable situation after doing so.
[Android Head-Units] j2gifted:
I didn't know you could block play store updates
[Android Head-Units] kaween:
You're not the only one. I only found it after searching for a solution for your odd situation. I knew it had to be possible, but I've never needed it myself. :p
[Android Head-Units] heynumber99:
I have the exact same problem! I have the 2 knob unit running 2.8.8. My problem started a couple of weeks ago, for no apparent reason. I've tried many of the same things you tried, but I haven't figured out how to uninstall google play updates. I can go to Apps and then Google Play, but I don't see an option to uninstall the updates. Can you help with that? If I can do that and the wifi goes to blue, my next step would be to figure out how to disable the auto updating of the play store. Thanks!
[Android Head-Units] j2gifted:
Thats how I do it.

Settings.. Apps.. Google play store..

And uninstall updates is right next to the force close button

It seems like our issues startee about the same time.
[Android Head-Units] TheSSJ:
Another thing to try came into my mind (if you didn't give up already ;) )

How about changing your dns resolver to the google ones?

Just add the 4 Lines in this post into your build.prop (have this set also on my unit):

http://xdaforums.com/showpost.php?p=32189732&postcount=6

Don't forget adding a single new line at the very end of the build.prop file :)
[Android Head-Units] j2gifted:
I must admit that I am on the verge of giving up.... I'm tired of reinstalling apps and my Spotify offline playlists lol.

But I'll give it a try. Exactly how do I do this?
[Android Head-Units] TheSSJ:
[MENTION=5179588]j2gifted[/MENTION]:

No big deal:

1. Make sure your device is rooted

2. Install https://play.google.com/store/apps/details?id=com.jrummy.apps.build.prop.editor

3. Open the app, click on the + Sign and enter the entries in the post I linked to earlier, for example:

Under "property name", enter: net.rmnet0.dns1

Under "property value", enter: 8.8.8.8

and so on

After you entered everything, reboot your unit and the new values should be permanently active (fortunately the system doesn't replace the build.prop file with its original state after every reboot).

Tell us if it helped!
[Android Head-Units] j2gifted:
I will have to re-root the radio tomorrow and give this a try. I went back to stock 2.7.4.

Question:

If I reinstall 2.8.8. and root according to the instructiona here, do I HAVE to wipe the device? Or can I just install 2.8.8. and root on top of 2.7.4. as is with the apps and stuff I have installed and not lose anything?
[Android Head-Units] kaween:
No reason to wipe your previous situation.
[Android Head-Units] gefi:
Oh thanks mate ! I tried several other sellers even on ali.... none want to sell it . One did agree but said i will have to wait over a month for a new batch .... :( And if i must be honest - i think that seller just didn't want to say no :)
[Android Head-Units] heynumber99:
Hmmm, next to my force close is a Disable button. I have version 4.6.17 of the Google Play Store. I think I'll try installing an older version and see what happens.

---------- Post added at 11:15 AM ---------- Previous post was at 10:55 AM ----------

:) This appears to have worked for me. Thanks for the suggestion!
[Android Head-Units] TheSSJ:
Heyyyy, nice to see that it worked for you :)
[Android Head-Units] djblaze852002:
A Different Kind of AN-21 U

I went ahead and ordered this unit: (LINK) It looks great! It is definitely larger than my original unit that died, so I had to make some modifications to my dash kit to make it fit. The screen is a full 7" with no DVD drive. It also has bluetooth OBDII capabilities and DVR function. It came with firmware 2.9.3_20150126 and MCU 4.3.11-16-10-650101.

I have started setting it up and I am running into some issues I am hoping some of you can help me with.

1) I am experiencing the grey wifi bars that other users have reported. I am not too worried since everything seems to function fine and I don't use email on it. Is there some other service that is inhibited by the grey bars?

2) I am having a very hard time rooting this unit. I have tried multiple versions of BaiduRoot including the one in the 2.8.8permroot folder. When I run Baidu , everything seems to go fine and it says it successfully roots the unit. However, when I install the Superuser app, it fails to load its binaries. It seems like it works and Baidu grants access to Superuser, but after I am unable to use apps that require root. Are there any other things I can try? I really miss being rooted and having xposed installed to set DPI and other tweaks.

3) I got a version that supports bluetooth OBDII and it works great with Torque. But I really want to use it with other apps like Dash. Has anyone else with bluetooth OBDII gotten it to work with apps other than Torque? I cannot get Dash to recognize the OBDII sensor.

4) My Mic volume is pretty low and people have a hard time hearing me. I don't really want to use the external mic. My original unit was fine without an external mic and I would rather not have it looking ugly in my car. In the description of the unit (link above) the seller mentions "Our Default Voice of External Mic is Small,When you use it ,you need turn up the voice". I have looked everywhere and do not see any options to turn up mic volume. Does anyone know where it could be and if I am missing it?

I plan on doing a full review of this unit and posting it soon. It has different passwords for Extra Settings and Factory Reset which I got from the seller. It also has some other minor differences. I will post as much info as i can very soon.
[Android Head-Units] kaween:
Hi Dj ! Congrats on your new unit, may you have more luck with it then your previous one. Anyhow, lets see if I can help you out a bit.

1) look at SSJ's brilliant tip. It's easy to say afterwards "oh but that was easy", but the idea itself never occured to me till I read his approach.

2) rooting if baidu won't play nice : http://xdaforums.com/showthread.php?t=2528349&highlight=root&page=653 and further.

3) no idea. Don't know Dash. And my fried "lost" my OBD BT interface (goes to show how dangerous it is to lend stuff to other people). :(

4) You know, I've mailed these guys and girls at Zhoon. Friendly people, but ..... they can be REALLY slow in understanding English. AND their English is even worse than mine is. :eek:

I'm pretty sure they kinda mean "you HAVE TO SPEAK UP". (oh yes, I'm bloody serious).

What I FEAR (and most of these companies do) is they simply slapped the mic connector on the unit, resulting in a "parallel mic situation" when you plug in the external one. Result : bad impedance value, wrong signal behavior, sound signal deterioration by the time it gets to your BT board. If in fact your internal mic WORKS without hooking up the external, you can be SURE they did it the wrong way.

Only way to solve this : opening the device, disconnect the internal mic wires. Know that LOCATION of the external mic is EVERYTHING. Fail there : you're attempt is already doomed. MUhahaha .... :)

OR the instructions are written for generic use. I've only known one headunit (the Roadnav S series) which permitted sensitivity changes in the android software, but to exclude errors, simply write them but -make-very-sury-you-speak-in-clear-and-simple-terms- because otherwise, they WILL misunderstand you.

There's a forum member who bought exactly that same model (Zexgx). You may contact him for more hands-on experiences.