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[HOWTO] Milestone USB-Host mode & using USB devices

Motorola Milestone - USB OTG - USBHost Mode
Found on Chris Paget's blog and since there isn't anything related, I'm postin' it here for xda-devs (with some clarifications and corrections in his words).
You’ll need to make two things, a micro-dongle to enable the USBHost mode (that you'll plugin during boot time) and a cable with the right connectors on each end (for connecting your peripheral).
To do this you’ll need three cables:
- A car charging cable (off-the-shelf at the Verizon store)
- A Micro-USB cable (as above)
- A USB extender cable (the tiny ones that sometimes come free with USB keys work great)
Start with the car charging cable. Break open the micro-usb connector (it comes apart fairly easily) and look at the little PCB inside – there should be a single tiny surface-mount resistor and two wires from the charger cable. Unsolder both wires and the resistor, and then bridge the pads where the resistor used to be so that it’s completely shorted.
The end result should look something like this:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
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(Micro Dongle)
Next up, you need to make your connector cable. Cut the end off the USB extender cable, you want to keep the socket end and discard the plug. Cut the micro-usb cable as well, but on this one you want to keep the plug and discard the socket. You should now have a micro-usb plug that’ll fit into your droid and a usb socket that you could plug a memory stick into. Strip the wires off the ends of both cables and join them to each other, connecting like colours (and the shield) together. When it’s finished it should look something like this:
For using USB-Host mode and your USB peripherals you have to do the following:
- Turn your Milestone off
- Plug the micro-dongle into the USB port
- Turn the Milestone on
- Unplug the micro-dongle as soon as the Motorola logo disappears (when the Android bootscreen is appearing).
Once your Milestone is booted, pull up a terminal and look at dmesg – after plugging in your USB peripheral using the cable you made earlier you should see the usual kernel notifications about new USB devices being connected; they’ll also turn on (or start charging) if they’re powered by USB.
You’ll only be able to plug in one peripheral before the port reverts to peripheral mode and you’ll have to reboot with the micro-dongle if you want to go back into host mode.
Also, if you leave the micro-dongle plugged in too long it triggers another bug, the port gets stuck supplying power to devices but not actually recognising them. Hopefully the drivers are sufficiently open-source that these are easy bugs to squash, and that dynamically switching between host mode and peripheral mode won’t be too hard to add either.
USB external storage won't work, but USB Keyboards are working. Anyway, we can compile a module for making the Linux kernel to recognize all we want since we can insmod as root.
--kholk

and the same text are here

Is it possible to load a module witch allows usb memory sticks?
Sent from my Milestone using XDA App

I made a USB host cable based on Gowthamj reply on the same blog.

Anyone sell this on ebay?

rizdroid said:
I made a USB host cable based on Gowthamj reply on the same blog.
Click to expand...
Click to collapse
Hi,
Some schematics or blueprint that you can upload here?. Look great!!!
EDIT: Got it!: http://sites.google.com/a/gowthamj.com/www/

i do host cable with blueprint from post #6 and... Something work
I'dont have any classic usb keybord (only wireless), but i try with usb storage.
After reboot and pressing button red led on pendrive blink a few times, after i release button (after M logo) they turned black.
It means that cable is ok, in dmesg i saw notification of connecting USB Device. But without drivers in kernel we can put this in our... boxes with accesories... kernel is locked, host usb is IMO only a funny feature of Motorola Milestone

Cant we use the modules they use to connect usb memory sticks to their N1s?
Would this work?
Sent from my Milestone using XDA App

royalcs said:
Cant we use the modules they use to connect usb memory sticks to their N1s?
Would this work?
Sent from my Milestone using XDA App
Click to expand...
Click to collapse
No, because the N1 uses a different kernel and modules as to the Motorola Milestone.

Is there a chance for external USB sound card to work?

bump!
I'm not a linux guy so anyway - do the drivers for usb host HAVE to be compiled in kernel? As on milestone the kernel can't be modified this implies the usb host on milestone works just with - usb keyboards?
Is there any way to use other usb devices? I'm asking because if not it seems it isn't worth to make the "micro usb host + switch" cable...

there is no way untill we can put or own kernel signed by owrselves on the milestone
Live long and prosper- tapatalk

thx but we all know that.

MuF123 said:
thx but we all know that.
Click to expand...
Click to collapse
so.. we all know that the only included driver available is for keyboard, no one has ever reported anything but, and yet... there is a post asking about it, isnt it?
Live long and prosper- tapatalk

Khul said:
so.. we all know that the only included driver available is for keyboard, no one has ever reported anything but, and yet... there is a post asking about it, isnt it?
Live long and prosper- tapatalk
Click to expand...
Click to collapse
could you please read what you post?
Khul said:
there is no way untill we can put or own kernel signed by owrselves on the milestone
Live long and prosper- tapatalk
Click to expand...
Click to collapse
You said kernel is locked.
We all know that.
And if being smarta*s is the only thing you can do here I think noone is interested in your posts Bye.

Please ppl don't become offensive...Just ignore some posts and let's continue to be productive about the topic

we can try to load modules for the kernel. no need for custom kernel. just compile the module sources against the milestone kernel and present libs (for ex. the now famous kernel 2.6.32.9-ge635aa4

so it is possible, but requires better knowledge of linux stuff like compiling etc - that I as a windows user don't know... however - for a person who knows how to do that - is it possible without much effort to do that? or do you need to code your own driver or what
edit> what do we need to do that? let's say I will come to my friend to do the compiling for me - what does he need to do that? how will I then use those drivers? is it same as in linux so will some guide for linux apply to android?

MuF123 said:
if being smarta*s is the only thing you can do here I think noone is interested in your posts.
Click to expand...
Click to collapse
wow jumpi huh? no need to mate, not being smarta*, just returning your "we all know that" right back at ya. nothing more, its all good.
anyways, i didnt think you could actually add more drivers and get them to load properly... thats nice to hear.
Live long and prosper- tapatalk

Awesome!!Nice guide!!! Thank you!!!

[Q] An app to make my phone act like a USB flash drive

I have a galaxy s, running android 2.2, and I was wondering if there is an app I can get which would make my phone emulate a USB flash drive, when the micro USB is plugged into the top.
The reason for this is I have USB input for my car stereo, as well as iPod/iPhone and all that fancy stuff, however that doesn't help for the phone I have. So I would like to be able to somehow 'fool' the head unit into thinking there is just a USB flash drive plugged into the USB input, but instead, it's actually the phone through the micro usb to normal usb cable. The head unit could then play music that is stored on the phone (hopefully by me selecting which directory to use as the emulation)
Is there anything like this around?
Thanks
Denno

I thought every Android device can do that. Just connect device, tap new notification and select enable. I have used G1 with my Samsung TV, so it works well with non-PC devices.

Is there anything special you need to do on the phone or on the tv to get to the location of the media files?

Brut.all said:
I thought every Android device can do that. Just connect device, tap new notification and select enable. I have used G1 with my Samsung TV, so it works well with non-PC devices.
Click to expand...
Click to collapse
I dont think it comes up with that option unless its connected to a computer. Like when you plug it in to charge it, it doesnt let you mount the sd card.
To OP, if your stereo allows you to plug into the headphone jack, you can use the music player to play the music and it will go to your car that way. I havent seen an app that will fool the phone into thinking its plugged into a computer or similar. Good idea though, I could see where an app like that would be useful.

It's not the phone that I want to trick into thinking it's plugged into a computer, it's the head unit. I want it to think that it's connected directly to a normal USB flash drive.
Unfortunately there is only USB and iPod inputs, no 3.5mm jack. I could hack one together, but I would much rather an app so everything stays neat lol.

denno020 said:
I have a galaxy s, running android 2.2, and I was wondering if there is an app I can get which would make my phone emulate a USB flash drive, when the micro USB is plugged into the top.
The reason for this is I have USB input for my car stereo, as well as iPod/iPhone and all that fancy stuff, however that doesn't help for the phone I have. So I would like to be able to somehow 'fool' the head unit into thinking there is just a USB flash drive plugged into the USB input, but instead, it's actually the phone through the micro usb to normal usb cable. The head unit could then play music that is stored on the phone (hopefully by me selecting which directory to use as the emulation)
Is there anything like this around?
Thanks
Denno
Click to expand...
Click to collapse
I did it with one of my friends phones a while back. Plug into USB on the head unit and android should ask you if you want to 'charge only', 'mount as disk drive' etc. Just choose 'mount as disk drive' and the head unit will have access to all the folders on the SD card.
The folders with music in them are listed on the head unit's screen and you go from there.
Maybe it's less of a phone problem and more of a 'that particular head unit' problem.

Oh cheers chjade84, if that's the case, I might go try that now... Who cares if it's 3.44am :/ haha

I'll be interested to know if you get it working.

No good . I tried both with USB debugging on, and with it off, and both times the head unit said Device Error when I selected USB as the source.. Bugga, not going to be an easy solution lol. Surely there would be a way of making the phone 'behave' like a flash drive when I plug in the micro usb (and subsequently select the app to do the fooling).. I wonder how hard it would be to program something like this myself... Probably too hard lol.

when I say debugging, I mean with the usb connected. I have debugging turned on on my phone, so I get a different screen to that in the video posted above. So I don't mean turning debugging on and off, I simply mean 'connecting usb storage', and not having it connected.. if that makes sense..

denno020 said:
It's not the phone that I want to trick into thinking it's plugged into a computer, it's the head unit. I want it to think that it's connected directly to a normal USB flash drive.
Click to expand...
Click to collapse
Still you don't understand. Android works as normal USB flash drive already. But seems you can't use this mode, because Android does not detect, that it should enable it. cwill0303 is right, you need to somehow force-enable usb mode.

Oh i see, thanks for clearing that up, I didn't know android ran in that way..
Sent from my GT-I9000 using XDA App

You could try "Extended Controls" widget. It has a toggle for as "Mass Storage - enables and disables mass storage" although my EVO gives me the error "Your device does not support direct control of USB".
It's a paid app ($1.09) but it's well worth it for all the options it gives you for toggling stuff from your homescreen.
I don't know if it will help or not.
EDIT: See my next post before buying!

Do you have root? You could try to run this command from a terminal:
Code:
echo /dev/block/mmcblk0 > /sys/devices/platform/usb_mass_storage/lun0/file
I could confirm that it works on my G1 and it enables USB mode permanently - if I unplug phone and plug it back, it will mount automatically. So I think it should work even with device, which isn't recognized as a PC.
Few notes:
I think it requires root permissions.
You will have to disable USB manually. If you won't do that then most probably you won't have access to your SD-installed apps and it may drain battery.
If it will work, you should be able to create some widget or other method to easily enable/disable force-mount.
EDIT:
To disable force-mount run: "echo '' > /sys/devices/platform/usb_mass_storage/lun0/file"

Try this app.
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It's called Widgetsoid and it lets you toggle USB Storage - Connect/Disconnect SD card to PC.
And it's free!

I actually already had widgetsoid, so I tried with that widget, however it still didn't work. Still tells me 'device error' on the head unit display.
I do have root permissions, but I have no idea how to run terminals or anything, plus I think that's just going to be doing the same as the widgetsoid widget does...
I will have a look into the format type of the card and what the head unit can read...

Ok so I've just checked the file format of my sd card, and it's FAT32, which the head unit should be able to read.. So I'm out of ideas...

denno020 said:
I do have root permissions, but I have no idea how to run terminals or anything
Click to expand...
Click to collapse
https://market.android.com/search?q=terminal+emulator&c=apps
or you could install SDK on your PC and run "adb shell" command.
denno020 said:
plus I think that's just going to be doing the same as the widgetsoid widget does...
Click to expand...
Click to collapse
You need root to modify /sys/devices/platform/usb_mass_storage/lun0/file file and Widgetsoid doesn't need root for usb mount, so it definitely uses different method to enable it.

You could try to mount sd card from recovery. I know its an option on clockwork not sure about others.
Sent from my DHD

Having just gotten one of the Galaxy S family last week, they approach the USB options slightly differently from other Android devices (Due to Samsung's 'awesome' Kies suite, I believe). Assuming you're using Froyo, go to Settings/Applications/USB Settings and choose Mass Storage. Make sure debugging is disabled. That should trigger the regular Android mass storage interface when you plug in the microUSB cable.
It still might not play nicely though, most of those USB readers in stereos aren't good for reading anything bigger than ~4GB. Also, since the Galaxy S family have internal storage 'and' an SD slot, it'll mount as two mass storage devices instead of one, which may confuse things further.
Best of luck.
Sent from my Vibrant using XDA Premium App

[Q] [HELP] OTG not working on my Note 10.1

Hello,
I have the N8010 version with stock samsung XSA firmware and I bought a OTG cable last week and it does not work.
I am rooted. I tried to attach mice and keyboards and other devices like a pen drive but it does not work. when i connect the otg cable by it self, it shows the USB connector attached notification but it goes away in few seconds. Usb Host Controller (https://play.google.com/store/apps/details?id=hu.sztupy.android.usbhostcontroller) app does not show any device connect. I have tried connecting devices with USB debugging enabled and also it being disabled.
I also flashed cm10 and it does not show anything at all when I connect the OTG cable. I dont think there is a issue with the cable. Please help me out here. Devs, please make a kernel like the SiyahKernel (for SGS2 and SGS3)
:crying:
:crying:
:crying:
:crying:
:crying:
:crying:

hiruna said:
Hello,
I have the N8010 version with stock samsung XSA firmware and I bought a OTG cable last week and it does not work.
I am rooted. I tried to attach mice and keyboards and other devices like a pen drive but it does not work. when i connect the otg cable by it self, it shows the USB connector attached notification but it goes away in few seconds. Usb Host Controller (https://play.google.com/store/apps/details?id=hu.sztupy.android.usbhostcontroller) app does not show any device connect. I have tried connecting devices with USB debugging enabled and also it being disabled.
I also flashed cm10 and it does not show anything at all when I connect the OTG cable. I dont think there is a issue with the cable. Please help me out here. Devs, please make a kernel like the SiyahKernel (for SGS2 and SGS3)
:crying:
:crying:
:crying:
:crying:
:crying:
:crying:
Click to expand...
Click to collapse
Otg cable works with my stock N8010 WALI6 Rom from sammobile. Am also rooted.
Sent from my GT-N8010 using Tapatalk 2

Depends on the Adaptor but check if it has a small switch on it. I have one that switches from memory card reader to usb adaptor as it has both...
Might be of help to you but might not...

Sounds like a faulty adapter to me. The icon should stay when it is plugged in.

Otg cable works with my stock N8010 WALI6 Rom from sammobile. Am also rooted.
Click to expand...
Click to collapse
mine doesnt work...

Depends on the Adaptor but check if it has a small switch on it. I have one that switches from memory card reader to usb adaptor as it has both...
Might be of help to you but might not...
Click to expand...
Click to collapse
mine is just a cable.. heres the link where i bought it : http://www.ebay.com.au/itm/USB-OTG-...AU_MobilePhoneAccessories&hash=item4abbcc741a
thats the exact cable on the image that i have

Sounds like a faulty adapter to me. The icon should stay when it is plugged in.
Click to expand...
Click to collapse
ye thats what i thought, but then again how come it gives power to my usb hub (the light on usb hub lights up as it shud) but it dsnt show on the n8010 ... should I try to return as a faulty cable ?

otg works fine
got the cheapast OTG from amazon and works fine ... tested with stock n custom roms

Get the original Samsung otg adapter, it works the best.

true that
mdalacu said:
Get the original Samsung otg adapter, it works the best.
Click to expand...
Click to collapse
about time i buy a original OTG cable

I'm having an issue with OTG as well, and am wondering if anyone has experienced similar issues:
I purchased 2 different OTG connectors from eBay
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I received them today, and decided to give them a try. Plugging the OTG connector in displays the message "USB connector connected", and in the case of the Card Reader+Hub turns the power light on on the hub. However, in both cases no matter what I plug into the OTG connector (mouse, keyboard, thumbdrive, SD card) my Note 10.1 mounts the connected device, and then immediately dismounts it, and continues doing so in an endless loop.
I've tried rebooting the Note (several times), plugging the OTG connector in and then the USB device, plugging the USB device into the OTG connector and then attaching that to the Note, disabling/enabling USB Debugging. Nothing has worked so far.
I haven't come across this issue being reported elsewhere, and I do find it odd that this would occur with two different OTG connectors in exactly the same fashion.
I am running Team Union ROM on an N8010, so it's possible it could be that. But otherwise I'm not sure.

Have the same cardreader + hub OTG adaptor, works fine with memory card and flashdrives, won't work with a HDD as it requires external power and haven't tried a mouse or keyboard.
I'm using Dr Akrims JB rom....

Has anyone with the standard 4.1.1 (German leak) firmware had success with any adapters? I almost bought one and then read about issues, so I'm hesitant to buy something if it won't work. Thank you!

Fixed the issue :d
Hey guys,
sorry for this late reply, been busy
BUT,
After posting the thread, i decided to crack open the 30 pin connector (correct me if im wrong) and see if anythings wrong. so found that it was cheaply built and a wire was not soldered. i didnt return it, instead bought a new one with a card reader and one usb port. bought 2 of them just in case. both works, its great
thank you all for participating
P.S check out my facebook page @ https://www.facebook.com/pages/Samsung-Galaxy-Note-101/126675490838688 and like.

[Q] simultaneous slimport and otg, not possible?

I had visions of building a dock that would connect the nexus 5 both to:
1. a monitor (or tv)
2. usb hub (allowing access to keyboard, mouse, ext hd, etc.)
but...
my couple of hours of research is looking like this isn't possible, as there isn't a way to run slimport and otg hosting simultaneously. (at least my poking around the nexus 4 and nexus 7 forums has yet to bear fruit). in fact one slimport paper i found describes how pins 2, 3 and 4 would toggle between the two (usb otg and slimport). I'm not confident how such switching would be happening "on the fly".
anyone know of any "successful" threads I'm missing? or is the vision screwed from the go?
Thanks!

*BUMP*
Anyone have a copy of that service manual that leaked? I would love to know what it has to say about simultaneous USB OTG and HDMI, if anything. I know GS3/4 can do this because they have a special 11 pin USB/MHL connector but I can't find anything about USB OTG & HDMI at the same time on SlimPort....
Thanks,
Kevlar

KevlarTheGreat said:
*BUMP*
Anyone have a copy of that service manual that leaked? I would love to know what it has to say about simultaneous USB OTG and HDMI, if anything. I know GS3/4 can do this because they have a special 11 pin USB/MHL connector but I can't find anything about USB OTG & HDMI at the same time on SlimPort....
Thanks,
Kevlar
Click to expand...
Click to collapse
Here's a relevant block diagram:

pau11y said:
I had visions of building a dock that would connect the nexus 5 both to:
1. a monitor (or tv)
2. usb hub (allowing access to keyboard, mouse, ext hd, etc.)
but...
my couple of hours of research is looking like this isn't possible, as there isn't a way to run slimport and otg hosting simultaneously. (at least my poking around the nexus 4 and nexus 7 forums has yet to bear fruit). in fact one slimport paper i found describes how pins 2, 3 and 4 would toggle between the two (usb otg and slimport). I'm not confident how such switching would be happening "on the fly".
anyone know of any "successful" threads I'm missing? or is the vision screwed from the go?
Thanks!
Click to expand...
Click to collapse
From my understanding this is not possible. However, it isn't necessary either since the slimport protocol allows for simultaneous transport of data, audio, and video.
The real question isn't whether we can do both USB otg and slimport at the same time, but rather, when will a slimport dock with a USB hub be released??
Checkout this article:
http://web.luxshare-ict.com/en/NewsDetail.php?ctype=1&autono=11
Edit:
Also see:
http://en.wikipedia.org/wiki/DisplayPort#SlimPort
Notice that it says "support conversion to DisplayPort." If you read up on DisplayPort you will understand more on the potential of slimport. I can't wait until the next generation of smart phones are released with USB 3.0 and the respective slimport iteration.

Hi,
I'm interested in connecting keyboard and display at the same time. You said "Next generation with USB 3.0". If I connect my Nexus 5 to my computer it sais "this supports USB 3.0, I just have to plug it in an usb3 port. I did, but maybe a special cable is neccessary. It seems like our Nexus supports USB3.

When I said USB 3 I was just referring to the fact that it theoretically could handle a higher bandwidth of data over slimport. I didn't realize the nexus 5 was USB 3.0 compatible. In any case the slimport dock would have to be designed to utilize the 3.0 spec and that won't happen unless the slim port standard supports USB 3. Whether or not it does already support it, or if plans exist to upgrade the standard is unclear.
Sent from my Nexus 5 using xda app-developers app
---------- Post added at 04:14 PM ---------- Previous post was at 04:09 PM ----------
Brom2 said:
Hi,
I'm interested in connecting keyboard and display at the same time. You said "Next generation with USB 3.0". If I connect my Nexus 5 to my computer it sais "this supports USB 3.0, I just have to plug it in an usb3 port. I did, but maybe a special cable is neccessary. It seems like our Nexus supports USB3.
Click to expand...
Click to collapse
You can currently use wireless display and USB otg simultaneously. No special docks required... In fact you could use wireless display and a Bluetooth mouse and keyboard and get the desired functionality without having to plug anything into the phone.
Sent from my Nexus 5 using xda app-developers app

I am almost positive when I faced the same problem with the nexus 4 analogix had plans of creating a adapter that covered this, I will defiantly start researching this more once I get my N5.

.....

this article echos michaelmab88's statements, basically saying simultaneous otg-slimport can't happen "now" ("now" being last May when the article was written), but that such things should be expected "next year".
Does anyone know which slimport chip version we (nexus 5 users) have? been having trouble tracking that down.
Analogix's latest Slimport chips (the ANX7808) are, for example:
DisplayPort 1.2, MyDP 1.0, HDMI 1.4a
...compliant, and refers to things like "Seamless switching between USB and MyDP 1.0", which of course may just mean "when you swap plugs".
EDIT:
It is the ANX7808.
Here's a nice breakdown of nexus 5 components.

and..... poop.
The ANX7808's detailed product info pdf states:
"The same connector on the device can be used for USB when a SlimPort® receiver is not connected."
So I guess it's looking like, unless some clever Slimport trickery is conceived, Miracast is the "out of the box" way to go get the video data to the monitor and have simultaneous otg hosting.

pau11y said:
and..... poop.
The ANX7808's detailed product info pdf states:
"The same connector on the device can be used for USB when a SlimPort® receiver is not connected."
So I guess it's looking like, unless some clever Slimport trickery is conceived, Miracast is the "out of the box" way to go get the video data to the monitor and have simultaneous otg hosting.
Click to expand...
Click to collapse
pau11y,
We now know that we can't use the USB functionality whilst using SlimPort for DisplayPort video, however, can the Nexus 5 use the USB channel that should be possible over DisplayPort?
As I've replied to farmerbb in this post, I'm very keen on a solution for the Nexus 5 where I can use a wired display, keyboard and preferably mouse for a Bring Your Own Device (BYOD) functionality where the office worker should only need their Nexus 5 (or other phone) to do all their work (with the work place only needing to supply the MyDP adapter, monitor, keyboard and mouse).
DisplayPort 1.2 even supports multiple displays (by MST) and that would be great if standard Android could grow to support multiple monitors and simultaneous apps in use (ala Samsung Galaxy Note 3).
I'll have to read up on MyDP 1.0 to see if it excludes any functionality of DisplayPort 1.2 (e.g. the USB channel).
Regards,
Matt

The padfone infinity kind of does that between the phone and tablet station wich are connected with a micro usb port.
The tablet station has a screen, a touch screen, speakers, light sensors, microphones, front camera, and all this works through a micro usb port.
I don't know what protocol it exactly uses, but I know it supports slimport, and usb host.
So I wonder what magic Asus used to managed to output fullhd video on the tablet, and still manage to redirect devices inputs and outputs to the phone.
When docked in the tablet, we can't use the tablet micro usb port for usb on the go.

Guys, would something like this work?
http://www.ebay.com/itm/For-LG-G3-G...448165?hash=item1a0294aea5:g:u~IAAOSw-vlVlj7V
It has all the ports needed, but I don't know how it behaves... My guess is that only one at a time would work, but I wonder what would happen if you plug the HDMI in and after that a USB keyboard for example.

Nice. I would like to see Ethernet and displayport too.
Today I would desire to stick to Samsung:
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"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
http://www.amazon.es/dp/B00FXSVVNE/ref=twister_B00DS4F1E0?_encoding=UTF8&psc=1

OPO won't connect to PC in MTP mode.

I don't recall having this problem a few months ago when I tried this the last time so I think it might have been an update that made this happen.
Normally, in the notification bar I get a option to change the connection mode to the pc from "Charge only" to "MTP" or "Camera". However I don't get the notification this time. It will only charge my phone and it doesn't show up in my explorer.
I tried enabling USB debugging but for some reason it is greyed out as seen here:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
also when I try to change the connection mode manually through the "storage" menu I get this.
please help me.

1. Navigate to Settings > About Phone > scroll to the bottom > tap Build number seven (7) times. You'll get a short pop-up in the lower area of your display saying that you're now a developer.
2. Go back and now access the Developer options menu, check ‘USB debugging’ and click OK on the prompt.

drmuruga said:
1. Navigate to Settings > About Phone > scroll to the bottom > tap Build number seven (7) times. You'll get a short pop-up in the lower area of your display saying that you're now a developer.
2. Go back and now access the Developer options menu, check ‘USB debugging’ and click OK on the prompt.
Click to expand...
Click to collapse
could you please read the thread more carefully?
As you can see in the OP, I already did this.

Try using a different USB port and/or a different USB cable.

ryanmat said:
Try using a different USB port and/or a different USB cable.
Click to expand...
Click to collapse
I have tried this and it doesn't change anything tog the situation in the OP.

heulen said:
I have tried this and it doesn't change anything tog the situation in the OP.
Click to expand...
Click to collapse
have you try compare the same cable with different phone, if you had another phone, to make sure if its the cable problem or phone problem.
I do have similar problem with OPO original cable and recently a new remax cable, after sometime the usb connect function is stop working. Tried the same cable with my find 5 and its still not functioning. I do still wondering what caused that, because at first both cables usb function works normally.

si2kul said:
have you try compare the same cable with different phone, if you had another phone, to make sure if its the cable problem or phone problem.
I do have similar problem with OPO original cable and recently a new remax cable, after sometime the usb connect function is stop working. Tried the same cable with my find 5 and its still not functioning. I do still wondering what caused that, because at first both cables usb function works normally.
Click to expand...
Click to collapse
the problem also occurs when the phone doesn't have a USB cable inserted into it.

heulen said:
the problem also occurs when the phone doesn't have a USB cable inserted into it.
Click to expand...
Click to collapse
Errr, isn't that obvious ? If you don't connect your phone to USB/Data Sync Cable to PC then there's no notification about usb connection whether its charging, debugging or MTP

si2kul said:
Errr, isn't that obvious ? If you don't connect your phone to USB/Data Sync Cable to PC then there's no notification about usb connection whether its charging, debugging or MTP
Click to expand...
Click to collapse
yes that's right but then the usb cable can't really be the problem.

I have the same problem on a couple of different ROMs. I used to be able to use PDAnet and connect but now that doesn't even work.
I was finally able to update my ROM using an OTG cable and flash drive. A bit awkward but it works.

zulu657 said:
I have the same problem on a couple of different ROMs. I used to be able to use PDAnet and connect but now that doesn't even work.
I was finally able to update my ROM using an OTG cable and flash drive. A bit awkward but it works.
Click to expand...
Click to collapse
I use the standard rom that came with my OPO tho, shouldn't it always work?

heulen said:
the problem also occurs when the phone doesn't have a USB cable inserted into it.
Click to expand...
Click to collapse
heulen said:
yes that's right but then the usb cable can't really be the problem.
Click to expand...
Click to collapse
yes u might be right, i just pointed out that in my case, the cable was the caused. At first i thought maybe because of the rom, so i tested the same cable on different phone and tested different cables on the same phone, that's when i found the problem was the cable.
But i still wondering why i got two cables that at first every function (charging n data sync) works but then after sometimes only charging function works and i can't no longer used data sync function with the same symptoms as you.

heulen said:
I use the standard rom that came with my OPO tho, shouldn't it always work?
Click to expand...
Click to collapse
Got me... I have two OPOs, one always connects and the other one doesn't. I tried both OPO cables, two aftermarket cables with the same result. There must be a difference between the two but I have no clue what it is.

si2kul said:
yes u might be right, i just pointed out that in my case, the cable was the caused. At first i thought maybe because of the rom, so i tested the same cable on different phone and tested different cables on the same phone, that's when i found the problem was the cable.
But i still wondering why i got two cables that at first every function (charging n data sync) works but then after sometimes only charging function works and i can't no longer used data sync function with the same symptoms as you.
Click to expand...
Click to collapse
exactly, that's my problem. It used to work but no longer...
someone please help.

I do wondering is it because the cable can charge up to 2.1 mA, but still not sure about it.

Developer options ->scroll down there is an option for usb (must be something like usb format option, Greek for me )change it to mtp but it resets after u unplug the phone