USB device problem - Android Q&A, Help & Troubleshooting

Hi. I have a USB port on my car which can be used to play mp3 files of aauSB flash memory through the in car stereo system. The problem is, I needed to quickly transfer some music from my phone (Xperia Z3) to the flash memory, so I used a USB OTG cable to get it of my phone and into the USB storage. Only problem is, immediately after I plugged in the USB memory, the car did not recognise it, saying it is unsupported. I stopped the engine, waited some 10-15 minutes (so I made sure the car shut down it's computer), them tried again and did not succeed. So this leaves me wondering what could have gone wrong. I know I can simply format the memory and refill it again with the data, but I am really interested in what happened: what does actually Android do to such as memory when connected to the handset? I have to mention that the cults on the memory look fine, both on my Windows PC, and on my phone. Also, of useful, I don't know what OS the car uses, but it is a 2013 BMW 3 Series. Thanks for any help.

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[Q] help with USB on head unit in car.

so i got a pioneer 5200 head unit today. it has a usb slot in the front, you can connect things to it and its suposta read them .. such as a ipod/iphone or any other phone with a sd card I WAS TOLD.
but i cant see to get it to work with my vibrant :-/ i know i had to put it in to debug mode to get it to work with my mac.. so i was not sure if i was missing something that i should of done.
any help? thanks.
Mount after plugging in?
Sent from my SGH-T959 using XDA App
you would need to mount the drives on the phoen as samuel said... but there could be another issue... When you mount two drives will showup (internal and SD), can the head unit process two drives?
Not ALL radios have the ability to read every phone. I have a new JVC KW-NX7000 Navi and it would not read crap from my Cliq, but would from my G1. Haven't tried it yet with the Vibrant. Try taking it out of debugging and see if that works.
Another thing to consider is that the head units often have size limitations for the partitions they can read.
It also might be getting confused with the internal storage and the sd card since I doubt it can read more than one drive at a time.
Same problem with the stock radio on my 09 civic si. I believe it to be because of the way the phone provides access to the storage cards (USB hub)
Sent from my SGH-T959 using XDA App
good call, i didnt think of the two drive thing.
checking there site it says
"Not every USB device is compatible with a Pioneer headunit containing an USB port. See more details at the following webpage: http://www.pioneerelectronics.com/USBCompatibility. Pioneer headunits containing a USB port are compatible with USB MSC (Mass Storage Class) devices only, and are not compatible with DRM (Digital Rights Management) contents and MTP (Media Transfer Protocol) connection devices. For size and other limitations, please see Owner’s Manual. Unauthorized copying of music or other files is strictly prohibited. Optional USB extension cable is available for use with front USB ports."
how ever when going to the site they say its basically a blank page ha. ill try to take it out of debugging mode.. and if that does not work ill pop out the sd card.
i tried, taking out one of the sd cards, turning off debugging mode, changing it so i have to select if i want mass storage, or media mode.
and still i get nothing sad but oh well.. still got the aux port ha
I wish I had an aux port, fm transmitters suck ballz! I have to remove my antenna to not get static and even then, sometimes I do.
badaphooko01 said:
I wish I had an aux port, fm transmitters suck ballz! I have to remove my antenna to not get static and even then, sometimes I do.
Click to expand...
Click to collapse
These things work great! http://www.amazon.com/Scosche-FM-MO..._3?ie=UTF8&s=automotive&qid=1284670423&sr=8-3
And the magic question is... CAN WE PUT OUR DEVICE IN USB MSC MODE? (Mass Storage Class)
I think it's one thing we really need. Almost every device is compatible with it, not with MTP!
You have to enable mass storage device and then mount it once you've plugged it into your receiver. Theres an app called Auto-mount that will do out for you automatically. It will only transfer music stored on your sd you will have to use the headphone jack for Pandora and Slacker.
Sent from my SGH-T959 using XDA App
I have the same problem with my Vibrant. I have an Alpine IXA-W404. When I plug in my phone via usb, it shows "searching" then "not supported" but on my head units screen it starts to show some random music files on my phone, but won't play them. I tried plugging in using two different wires, and tried with debugging on and off.
Any help? I even saw a video where the guy was doing it online with a similar setup, using a Droid and some other similar Alpine deck.
when i select "media player" from the usb settings on the phone, after about 20 seconds, the head unit starts to play a few songs but its very choppy. Any help is appreciated!
Also found this post that seems relevant, http://forums.whirlpool.net.au/archive/1283501

[Q] usb connection issues to car stereo, and phone turns off in debugging mode

yesterday i succeeded with connecting the sg2 to my car stereo via usb,
using the following instructions
usb debugging mode off
while Idle then I go to usb utilities and press connect to storage pc
then I connect the usb cable
yesterday it worked fine, although i was bummed it did not read the music on the external sd card, just the music that is stored on the 16 Gb built in sd card, what a bummer.
BUT today i could not connect it and my car stereo gave me usb N/A
i tired to connect my experia play and my iphone and both worked and connected immediately via usb to my car stereo withut any hassles,
what is wrong here, and why only do i face that with the S2.
I also noticed 2 days ago that every time i connect my phone to the computer and usb debugging mode is on after i disconnect the drives from the computer and then press disconnect from my phone the phone turns off. I did a hard reset hoping it would solve the problem and also formatted my external sd card to fat 32 but still no solution. I have installed kies on my laptop and it identifies the note successfully. Why does the note keep turning off when I disconnect it from my laptop or computer
I really need to solve this as I depend on listening to music in my car using the usb cable as listening to the music directly from the sg2 via 3.5mm cable is really bad on my stereo compared to using the note as storage card.
I was so put down when I compared the same song being played from xperia play with the sg2 using poweramp with the same settings, as the sound coming from the xperia play was good compared to the sg2 which was awful. In this comparison both phones where connected via 3.5mm cable to the car stereo, so I have no choice now to only listen to music using the note as a storage card by connecting it to the car stereo via usb cable
this is when I miss the iphone when everything works out of the box, and I don't have to struggle like this
Please help me in solving this as its driving me crazy

[Q] Any way to get Note 2 to work with Car USB?

I've been researching this for a few days now and I am disappointed that I can not find any way to get my Note 2 to allow music playback over USB through the car's USB port. I am trying to hook it up to a Mitsubishi MMCS system.
I know that Samsung has removed UMS on their new phones and that's what most car stereos are used for. I downloaded SGS3 Easy UMS and it seems to work fine (except for the phone appearing as read-only cd drive when I plug it into my computer), and I can access every folder on the device in this mode - at least on the computer. When I plug it into the USB in the car, it starts charging, but the USB/ipod mode on the NAV says "No connection". And yes, it works fine if I hook it up to my old iphone.
My phone has been rooted and I even unlocked it and installed this custom rom on the device, but I still am at a no go. Unfortunately, using my phone as a media device for my car stereo on my long trips to work is one of the main functions I use my phone for. Right now I am stuck using bluetooth which has horrible quality and doesn't offer near the same amount of features on the stereo as USB does.
Does anyone have any ideas or am I simply hosed?

How to put files through PTP?

Hello guys,
I guess I need help from you. I'm trying to connect my phone OnePlus One to FIAT 500 that features Blue&Me system. I've been at service several times and we just can't figure it out. All I want is to listen to music from the phone in the car.
Car radio doesn't recognize my OnePlus One. It says no source available. That happens if I'm in MTP mode. If I choose PTP, it recognizes it well, but there's no media found. And there's no media, because if I connect it to my laptop via PTP I can't create folders or put mp3 files in it. How can I fix it?
Additional facts:
I have Samsung Galaxy S4 zoom. It has internal storage that says Camera (PTP I guess) and MicroSD card. I can put music to Camera storage and it works perfectly in my car, while it doesn't from MicroSD.
If I try to put my USB stick I'm getting the same issue as with OnePlus One. My USB stick is in NTFS doesn't work, while in FAT32 does.

Problems with OTG connected USB devices

Ok, so has anyone else had problems with this..
when you plug in an OTG connected usb device (i have the same problem with usb drives and midi controllers so far) and in the notification bar pull down it will say charging usb device, and when you choose to switch it to something else, like transfer files or connect a midi device, it just goes right back to charging the device after changing it for a few seconds or until you tap the screen or check it again.
This has completely stopped me from being able to connect a midi device, and causes the usb drives to get hot, although I can still transfer files in an 3rd party file manager, but the notification bar will never stay in tranfer mode, and it has never gone into midi mode at all.
This is not an issue with my OTG adapter, as I also have the same problems with borrowed adapters, as well as using DEX. In fact in dex, if I plug in a usb drive and switch to transfer files mode it will crash. Has anyone else experienced these problems? Are any of these apps for OTG management in the play store useful for this? They seem to be useless based on the reviews except for testing a UTG adapter. Thanks!
btw I don't have root, my note 8 is fully updated to BQLA version.
Hi, check the battery! If internal resistance goes up so does noise.
Check the cable and connector on the phone as well.

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