Develop Bugs

USB Host OTG Cable Adapter

Got one of these yesterday, quick delivery and does what it says on the tin: link

i have this and is working fine also. It's working even with an optical mouse...cool!

I had a bit of a hard time finding one in the US. I just ordered a micro usb cable and a female to female connector. I think it was under $2(US) total.

has anyone tried connecting external 500 gig hard drive to the galaxy s 2?
Sent from my GT-I9100 using Tapatalk

I have the adapter cable but does not work for GS2 but on the HTC HD2 its work.
Why does not work, does not show me any sign that the cable connected. Does it have to be some special cable?
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please help me how to activate usb host on GS2

please help me how to activate usb host on GS2
Click to expand...
Click to collapse
I didn't do anything to activate it beyond plugging in my cable and a usb stick......

pachi72 said:
has anyone tried connecting external 500 gig hard drive to the galaxy s 2?
Sent from my GT-I9100 using Tapatalk
Click to expand...
Click to collapse
I have, it doesn't work unless you have a external power supply for the hard drive. the phone can't supply enough power to it.

R4mrod said:
I didn't do anything to activate it beyond plugging in my cable and a usb stick......
Click to expand...
Click to collapse
yeah mines the same it automatically recognizes the cable even with no usb stick plugged in to the cable.

kolo200 said:
I have the adapter cable but does not work for GS2 but on the HTC HD2 its work.
Why does not work, does not show me any sign that the cable connected. Does it have to be some special cable?
please help me how to activate usb host on GS2
Click to expand...
Click to collapse
u have to mod this cable so that it would work. I guess it hasnt been manufactured as a HOST cable
check here: http://forum.xda-developers.com/showthread.php?t=1092493
there is the info u need

silentbob59 said:
I have, it doesn't work unless you have a external power supply for the hard drive. the phone can't supply enough power to it.
Click to expand...
Click to collapse
How is the performance when browsing thru the HDD?

USB host OTG best for galaxy note
Any USB mouse and Keyboard can use just like Plug and Play. Our customers used even wireless USB mouse for testing. Pen drive upto 32 GB support in proper way and also you watch movies without copying to Galaxy note.
for Indian customers its available in shopsection website
read customers reviews for your clarifications

[Q] How to Disconnect charging from USB Cable

I'm sorry if this question already asked before
When we connect SGW through cable data to PC the charging process is automatically.
I tried to stop it, so when we connect to PC with USB cable no more charging process on our device.
The process could damage the digitizer if we connect it or charge our device through cable data because the PC voltage wasn't stable.
So, how I can stop the charging process whenever I connect SGW to PC with cable data?

blloewy said:
I'm sorry if this question already asked before
When we connect SGW through cable data to PC the charging process is automatically.
I tried to stop it, so when we connect to PC with USB cable no more charging process on our device.
The process could damage the digitizer if we connect it or charge our device through cable data because the PC voltage wasn't stable.
So, how I can stop the charging process whenever I connect SGW to PC with cable data?
Click to expand...
Click to collapse
There is no way u can disable it by using soft-approach. The only way should be physically removing the DC in wire in the cable.

blloewy said:
I'm sorry if this question already asked before
When we connect SGW through cable data to PC the charging process is automatically.
I tried to stop it, so when we connect to PC with USB cable no more charging process on our device.
The process could damage the digitizer if we connect it or charge our device through cable data because the PC voltage wasn't stable.
So, how I can stop the charging process whenever I connect SGW to PC with cable data?
Click to expand...
Click to collapse
I would suggest you try to fix your computer before modifying any cables, as you say it is the computers fault.

usb requires dc voltage, so if you remove/damage dc+ or gnd wire the connection on bus will simply not work, had such an experience with one old chinese mini-usb cable..
but with only 2 contacts (dc+ and gnd w/o D+ and D-) charge is ok
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Charge and connect USB controller

So ICS supports USB gamepads/mice/keyboards which is awesome. The only problem is that the Galaxy Nexus only has one available USB port.
How can I connect a USB device to the gnex and charge it simultaneously?

Powered USB hub.

I see how that could work, however I want as little bulk as possible, and a USB hub would add a lot of clutter.
That got me thinking though.
Would there be any problem with charging and playing using this diagram?
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It isn't going to work, since the usb port on a nexus only can do one thing at a time: charging/being a slave (transferring files from a pc) or act as a host (for a keyboard/mouse/gamecontroller). This will not work together until a kernel dev finds/creates a workaround.

androo45 said:
It isn't going to work, since the usb port on a nexus only can do one thing at a time: charging/being a slave (transferring files from a pc) or act as a host (for a keyboard/mouse/gamecontroller). This will not work together until a kernel dev finds/creates a workaround.
Click to expand...
Click to collapse
Usb OTG supports accessory/charge mode, but the cable has to have the correct id for the usb chip to allow it. I don't think any cables have this enabled as of yet.
Sent from my Galaxy Nexus using xda premium

collingall said:
Usb OTG supports accessory/charge mode, but the cable has to have the correct id for the usb chip to allow it. I don't think any cables have this enabled as of yet.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
This cable won't suffice?
http://www.amazon.com/T-Flash-Adapt..._1_1?s=wireless&ie=UTF8&qid=1337812370&sr=1-1
If not, what has to be done to enable this?
Also, does this mean the powered USB hub won't work either?

XSafire said:
This cable won't suffice?
http://www.amazon.com/T-Flash-Adapt..._1_1?s=wireless&ie=UTF8&qid=1337812370&sr=1-1
If not, what has to be done to enable this?
Also, does this mean the powered USB hub won't work either?
Click to expand...
Click to collapse
I have a feeling that even if charging works (and I think it should) it will only charge at 500mA as I doubt OTG will work properly if you enable Fast USB charge. At the very least your battery won't die out quickly I guess, depending on the game's requirements hardware wise.

I'll try it out tonight if I can find my damn OTG cable.

Confirmation: Does not work.
Found my cable, and connected the phone to a powered usb hub. It actually would not charge OR read a thumb drive with stick mount. Both worked seperately, but the OTG is not a multitasker. Sorry.

[Q] (Probably help and guide) USB OTG problem related

Well,I try to connect my External Hard Disk and it doesn't work...I got a notification stated that it's empty or unsupported thing like that...how can I fix it?
Plus,I try to plug in my usb controller,I got a notification stated too much power consumption :crying: how can I connect my controller?
Thank you for every help that you guys give to me,I'll never forget it...
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UchihaDareNial said:
Well,I try to connect my External Hard Disk and it doesn't work...I got a notification stated that it's empty or unsupported thing like that...how can I fix it?
Plus,I try to plug in my usb controller,I got a notification stated too much power consumption :crying: how can I connect my controller?
Thank you for every help that you guys give to me,I'll never forget it...
Click to expand...
Click to collapse
I have a Sony DK10 LiveDock, which has it's USB port connected to an Aten US421A USB switch, which is connected to a Targus 7 port powered Hub.
As the Targus 7 port hub is independently powered, it'll support any Sony (LT26i) supported device.
And I have some weird stuff connected like a 80GB IDE FAT32 USB enclosed HDD and/or your bog standard WD 320GB USB HDD (FAT32), a DELL U2410 monitor with SDcard reader and a HP 8GB v165w USB flash drive.
So stuff does work, BUT, if you're independently powering this off your Sony microUSB port on your phone you will have to match the power output of the phone with the power requirement of the attached device.
USB2.0 is spec'd at 5V and 5x100mA units.
WD USB HDD requires V5 0.55A to run and we know they're not supported
It is possible(I don't know) that the output of the Sony LT26i MicroUSB is only around ~300mA and thus devices attempting to draw more power will not work. It could be as low as 100mA.
I have a HP 8GB v165w flash drive and that doesn't work directly connected to the Sony (LT26i), but does work when connected through a powered USB hub. So if one knew it's power draw, then one could work out what the Sony (LT26i) is providing.
This may also help with additional information: USB Controller Games (Xperia S)

Stock Rooted Gnex won't mount as USB to PC

This is my first post here to xda but I've been looking for a solution to this problem for a few months now.
I rooted my Gnex with the rootkit I found through XDA and although I had to do it about ten times and it kept saying it failed, it actually seemed to have worked since I have the SU app and have been able to use Titanium Backup.
Shortly after I rooted my phone it stopped mounting as a USB drive on my computer. I tried cleaning the micro USB port, different ports on my PC, different cords, and recently even did a factory rest and it still won't mount. As an added bonus I got an OTG cable recently and it also fails to work with my phone but works with other phones I've tried like an HTC ONE and GS3 and GS4. Not sure what to do other than maybe buy a new micro USB port online and replace it myself.
Like I said I'm still fully stock and running 4.2.1(still haven't gotten my 4.3 update, not sure if its related to the possibly botched root)
Any help would be greatly appreciated.
Thanks
Sent from my Galaxy Nexus using xda app-developers app

Thought this might help
Sent from my Galaxy Nexus using xda app-developers app
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When you say mount as USB, are you saying you are trying to mount it to view all the files like a mass storage device? Because to my knowledge, the Galaxy Nexus doesnt mount like that. It mounts as MTP which is a bit different but not as a mass storage device.
Or, are you simply saying that your computer doesnt recognize your device when plugged in?
Does your phone charge fine? If so, its not your USB port.

Yes I mean mount as USB...I know its a bit different and comes up as galaxy nexus in my computer. It worked before root and now doesn't. I did have a few days of charging problems but I just cleaned the micro USB and noticed the connector inside was bent downwards a bit. I bent it up very carefully and it charges fine now. This was all post root.
And aside from unrooting(which I'm not even sure how to do) I really don't know what to do. And even if I did know how to unroot or potentially fix the root I would need the usb to work anyway right.
Sent from my Galaxy Nexus using xda app-developers app