Develop Bugs

[Q] USB Host functionality with stock charger cable + USB female/female adapter

Maybe a noob question, but would that work?
Primarily a usb stick that I would use that way

jasahu said:
Maybe a noob question, but would that work?
Primarily a usb stick that I would use that way
Click to expand...
Click to collapse
Ok, info from other thread: It would not
But if happen to have positive experience please let me know
Sent from my GT-P7510 using Tapatalk

hav u tried it ? i was thinking there wud be some power issue wid tht !

freddyraptor22 said:
hav u tried it ? i was thinking there wud be some power issue wid tht !
Click to expand...
Click to collapse
No, I have not tried it, but they say in this thread that it is not only about power but having a resistor as well:
http://forum.xda-developers.com/showthread.php?t=1149442
especially post #10

Tested. Nope, this does not work.
I assume the resister is needed to tell the Tab to send power to the USB.

The resistor is needed to cause the Tab to enter host mode. No resistor - you've got device-to-device and that doesn't work.

Would it be possible to splice the resistors into the female-female usb cable? 2 resistors and a cable is a really cheap way to go.
Sent from my GT-P7510 using XDA Premium App

Pancake345 said:
Would it be possible to splice the resistors into the female-female usb cable? 2 resistors and a cable is a really cheap way to go.
Sent from my GT-P7510 using XDA Premium App
Click to expand...
Click to collapse
No, the resistors go between two dock pins that are not connected to the stock USB cable...

old thread, but i am in the need of the same.
would it theoretically possible to have a charging cable with a usb host part spliced in? i need to be able to connect a usb hid device AND keep charging the tablet. Would the current going into the tablet be mucking things up for the usb host operation?

noromamai said:
old thread, but i am in the need of the same.
would it theoretically possible to have a charging cable with a usb host part spliced in? i need to be able to connect a usb hid device AND keep charging the tablet. Would the current going into the tablet be mucking things up for the usb host operation?
Click to expand...
Click to collapse
It shouldn't since the charging +5V input is on separate pins from the +5 USB host power. But the Tab looks at the USB D+/- pins to figure out if it should do slow or high current charging. If it sees voltages that make it look like a host is on the other end of the pins, then it does 500mA max charging, and if the pins are floating it charges at max 2A. I don't know if host mode would screw that up. You could look at the kernel source, or just try it and see.

USB host cable for $5 on Amazon with Prime (works)

So, this works:
http://www.amazon.com/gp/product/B005FUNYSA/ref=oh_o00_s00_i00_details
However, it doesn't work for everything. A mouse works, but a USB Flash Drive doesn't seem to work, nor does another USB device that does work on the Acer A500 Android tablet I have.
So... Yeah. Just thought you guys would wanna know. I'll look into more devices. I know Honeycomb supported all kinds of USB devices (hub, flash drive, mouse, keyboard) so I'm a little surprised the flash drive didn't work. I'll let you know if I find anything else out. Might just be a driver issue we can work out with custom ROMS. Obviously the communications is working since the mouse works. It could be a power draw issue. I have a USB power meter and the mouse draws 20ma. The flash drive that doesn't work draws 60ma.
-Taylor
UPDATE: Works great with a device we are developing at work (basically a USB hub and FTDI chip combo board if that means anything to ya). It draws about 62ma, so the flash drive issue must not be due to power draw.
UPDATE 2: Rooted users can easily mount flash drives using the app StickMount in the market - its very clean and works well! Thanks to user [esoomenona] for the suggestion.

For who lives outside the USA, buy this with international free shipping: http://www.dealextreme.com/p/usb-fe...a-cable-for-samsung-i9100-galaxy-s2-5cm-67186
The only cons is that can take a while to arrive.

Would something like This work?

TweakMyDevice said:
Would something like This work?
Click to expand...
Click to collapse
http://www.dealextreme.com/p/micro-usb-on-the-go-host-otg-adapter-pair-50774

Do you get a cursor if you plug in a mouse?

Thank you I was looking for something like this. Finding the right cable on Amazon is like a needle in a hay stack.

For $5 i'll give it a try. Thanks!

TweakMyDevice said:
Would something like This work?
Click to expand...
Click to collapse
Actually it looks like no. One of the reviews points out its not a USB OTG (On the go) adapter. USB On the go is a USB port that can act either as a device (plug it into your computer) or as a host (plug in a mouse, etc). In order to tell the phone which mode to be in, USB OTG connectors need to have one of the pins hooked up to ground. Unfortunately not all of these adapters do (I have no idea what they're good for if they don't) and it looks like that one doesn't. But someone linked to the one on DealExtreme that might work.
wonshikee said:
Do you get a cursor if you plug in a mouse?
Click to expand...
Click to collapse
Sure do! Its pretty nifty.
Pacifik said:
Thank you I was looking for something like this. Finding the right cable on Amazon is like a needle in a hay stack.
Click to expand...
Click to collapse
Eh I just found a cheap one that looked ok and said it worked with some Samsung devices. I'm also happy its right angle, as its more pocketable. But glad to help!
-Taylor

http://www.amazon.com/Micro-USB-OTG-2-0-Adapter/dp/B005QX7KYU/ref=pd_cp_cps_1
Here's a cheaper one.
I would prefer this over a one piece, as I am worried about bending the micro usb port.

wonshikee said:
http://www.amazon.com/Micro-USB-OTG-2-0-Adapter/dp/B005QX7KYU/ref=pd_cp_cps_1
Here's a cheaper one.
I would prefer this over a one piece, as I am worried about bending the micro usb port.
Click to expand...
Click to collapse
Cool. Not Amazon Prime though. Its got free shipping but it would probably take a while. I ordered mine friday and got it yesterday (monday).

wonshikee said:
http://www.amazon.com/Micro-USB-OTG-2-0-Adapter/dp/B005QX7KYU/ref=pd_cp_cps_1
Here's a cheaper one.
I would prefer this over a one piece, as I am worried about bending the micro usb port.
Click to expand...
Click to collapse
Shoot, I paid a little over four bucks for that same one from the same company, on Newegg. I should've looked at Amazon as well. Oh well...

Okay, so I received the cable I stated above, and tried to plug in a microSD card via USB adapter, and it didn't work. After a bit of googling, I've come to think of two options for why it doesn't:
1. The cable doesn't work
2. The OS doesn't seem to mount them automatically. I found an app called StickMount on the Market, but it requires root, and I haven't rooted yet.
Anyone know anything about this?

esoomenona said:
Okay, so I received the cable I stated above, and tried to plug in a microSD card via USB adapter, and it didn't work. After a bit of googling, I've come to think of two options for why it doesn't:
1. The cable doesn't work
2. The OS doesn't seem to mount them automatically. I found an app called StickMount on the Market, but it requires root, and I haven't rooted yet.
Anyone know anything about this?
Click to expand...
Click to collapse
Well I mentioned in the first post that USB flash drives don't work. A card reader is going to have the same issue, as they're basically the same. I think its related to the phone not having its own microSD card, and so it lacks the drivers to mount storage properly. Which still seems silly to me if the device has USB host support, they should include those things!
Plug in a mouse. If a mouse works, the cable is fine.

esoomenona said:
Okay, so I received the cable I stated above, and tried to plug in a microSD card via USB adapter, and it didn't work. After a bit of googling, I've come to think of two options for why it doesn't:
1. The cable doesn't work
2. The OS doesn't seem to mount them automatically. I found an app called StickMount on the Market, but it requires root, and I haven't rooted yet.
Anyone know anything about this?
Click to expand...
Click to collapse
I honestly think this is going to be it...because of internal storage it doesn't come with the native ability to detect external storage. I'd imagine that app would allow it or that it'll get pushed out as an update down the road...maybe a MOD will get made too if it takes too long.
Either way, when mine comes *crosses fingers for tomorrow* I'll be rooting and post back the results.

Oh damn, StickMount works! Plug in a USB drive and stickmount will pop up asking to run. Then it mounts the drive and my file browser sees it. Then you unmount the drive before unplugging. Wish it was native but this is pretty damn simple. Thanks for finding it!
I was a bit skeptical since the USB drive doesn't even light up when you first plug it in, but once you run stickmount its all good!
Go ahead and root that thing! Just note rooting will erase the phone, so back up first!

I had a Micro USB to USB female for my Nook Color for UBS host. Tried it. Worked like a charm. It even drew enough to power a hub, the keyboard, and the mouse. I was shocked. Im going to but a splitter and use a MHL out to HDMI for 1080 goodness.
Got mine on Amazon for $1.46. Works well (I just wish it was a cable and not a plug though(.

I'll have to see how this works out, ordered the cable.
I have an externally powered USB hub that I can plug into the USB OTG cable.

This is great, I've been looking for these cables. Thanks!
Edit: Does anyone have any idea if you can use an MHL adapter for HDMI at the same time as one of these? I see that some MHL adapters have charging ports, but I don't know if they support data.

nosit1 said:
Im going to buy a splitter and use a MHL out to HDMI for 1080 goodness.
Click to expand...
Click to collapse
Using MHL through a splitter won't work based on how MHL works. You either get USB or MHL. MHL does not use USB-compatible signaling.

Alright, I typed this with a mouse and it's slow, but cool. Guess it's time to root. See you on the other side.
Sent from my Galaxy Nexus using xda premium

[Q] OTG USB hosting?

Is there a trick to getting the OTG/USB hosting to work? I have the latest Juggernaut ROM & latest Faux kernel. I received an OTG cable, but the phone doesn't react in any way to it. The light on my USB flash drive doesn't light up, mouse doesn't work, etc. Do I have a bad cable, perhaps? Or is there some setting I need to activate?
Thanks!

hella356 said:
Is there a trick to getting the OTG/USB hosting to work? I have the latest Juggernaut ROM & latest Faux kernel. I received an OTG cable, but the phone doesn't react in any way to it. The light on my USB flash drive doesn't light up, mouse doesn't work, etc. Do I have a bad cable, perhaps? Or is there some setting I need to activate?
Thanks!
Click to expand...
Click to collapse
It should work just fine out of the box. I got a USB OTG adapter from deal extreme that works wonders!
Sent from my SGH-T989 using xda premium

it works fine as stated above
i have it, and i use it often with USB drives
just need a USB to microUSB OTG adapter

This is the cable I got:
http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=120836061331&ssPageName=ADME:L:OC:US:1123
So I guess it's either not compatible with the T989 or the cable is defective? It fits in the bottom of the phone no problem, and USB devices physically plug in properly.

hella356 said:
This is the cable I got:
http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=120836061331&ssPageName=ADME:L:OC:US:1123
So I guess it's either not compatible with the T989 or the cable is defective? It fits in the bottom of the phone no problem, and USB devices physically plug in properly.
Click to expand...
Click to collapse
I have the Same problem like you have on your Phone. I have the Juggernaut V3.7 and and Bullet Kernel which support the OTG usb but I can not read the USB Flash Drive either.I think it's a bad USB adapter I bought it from Ebay too.

OK, I ordered another version of the cable, hopefully that will do the trick!
Thanks, fellas!

I received this OTG USB cable, which says it's for T-Mobile's Hercules, in the mail yesterday and it works great:
www ebay com/itm/200697301772#ht_1335wt_994
Seems to be very good quality. Another host cable I'd tried for the international version of the SGS2 (GT-i9100) did not work. It did work on my brother's i9100 he purchased in Europe, so the cable was good - just not cross-compatible (at least for that particular cable).
Sent from my SGH-T989 (on GingerSnap v1.2) using XDA

OTG+MHL? Maybe (anyone taken an MHL adapter (or 11pin to 5pin converter) apart yet?)

so, anyone taken apart an MHL adapter yet?
i have a sneaking suspicion, that the move to an 11 pin is what will allow BOTH OTG, and MHL at the same time, but i could be wrong.
look inside your USB port on the bottom of the S3...
whatya see?
the normal 5 pins on the USB part.. but what is that in back wall? THE OTHER 6 PINS!
yep, that is why you cannot plug the MHL adapter into a hub or anything.. there is 6 pins are missing.
Now, i am wondering:
has anyone taken it apart to see if the 6 pins are used alone, or if it uses the the USB also?
if it uses only the 6 pins for MHL-ness, then it should more than possible to make an OTG/MHL adapter/dock.
more thought says, if my theory is right, an 11 pin to 5 pin conveter may be the key.. and an otg can be spliced in to give 2 outputs: MHL in one (using an s2 MHL adapter) and OTG in the other.....
anyone wanna tear their adapter up? or are you guys gonna make me spend some money?

I ran across this post looking to see if anyone has done this yet. I am going to try to grab the 5 to 11 tomorrow and tear it apart (since it's the cheaper adapter). My plan was to rip it apart and if the original 5 pins are available, splice just as you mentioned.
I can't find a decent picture of the microUSB plug to see if all pins are there.
Also I found this:
http://homixtech.en.alibaba.com/pro...Galaxy_S3_11pin_To_Micro_USB_5pin_Gender.html
Which makes me think 11 pin microUSB plugs that work are available out there somewhere.

cmbg78 said:
I ran across this post looking to see if anyone has done this yet. I am going to try to grab the 5 to 11 tomorrow and tear it apart (since it's the cheaper adapter). My plan was to rip it apart and if the original 5 pins are available, splice just as you mentioned.
I can't find a decent picture of the microUSB plug to see if all pins are there.
Also I found this:
http://homixtech.en.alibaba.com/pro...Galaxy_S3_11pin_To_Micro_USB_5pin_Gender.html
Which makes me think 11 pin microUSB plugs that work are available out there somewhere.
Click to expand...
Click to collapse
I wait with baited breath... i REALLY think this is what is going on.

cmbg78 said:
I ran across this post looking to see if anyone has done this yet. I am going to try to grab the 5 to 11 tomorrow and tear it apart (since it's the cheaper adapter). My plan was to rip it apart and if the original 5 pins are available, splice just as you mentioned.
I can't find a decent picture of the microUSB plug to see if all pins are there.
Also I found this:
http://homixtech.en.alibaba.com/pro...Galaxy_S3_11pin_To_Micro_USB_5pin_Gender.html
Which makes me think 11 pin microUSB plugs that work are available out there somewhere.
Click to expand...
Click to collapse
So, did you do this experiment? Has anybody found a way to get access to all of the pins and make OTG work with MHL?

I've been waiting for two months for an answer about this. I'm glad someone started a thread. I kind of have this hesitation to start new threads.
I would love it if this could be integrated with the seidio active dock.
Sent from my SPH-L710 using xda app-developers app

nightwinn said:
I've been waiting for two months for an answer about this. I'm glad someone started a thread. I kind of have this hesitation to start new threads.
I would love it if this could be integrated with the seidio active dock.
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
I decided to take the plunge.... and have ordered a part to slice open. will update.

scarrmrcc said:
I decided to take the plunge.... and have ordered a part to slice open. will update.
Click to expand...
Click to collapse
Thanks bro!, Ive been searching for the answer to this awhile as well.. I wonder not many people have brought this up. Ideally I would love to use my S3 as a "PC".
Check this out: http://www.gottabemobile.com/2012/06/29/galaxy-s-iii-new-mhl-connector-also-enables-usb-on-go/
Edit: On another thread someone posted that they connected the USB OTG cable to the Micro USB port on the MHL adapter with no luck..hmm

romulusram said:
Thanks bro!, Ive been searching for the answer to this awhile as well.. I wonder not many people have brought this up. Ideally I would love to use my S3 as a "PC".
Check this out: http://www.gottabemobile.com/2012/06/29/galaxy-s-iii-new-mhl-connector-also-enables-usb-on-go/
Edit: On another thread someone posted that they connected the USB OTG cable to the Micro USB port on the MHL adapter with no luck..hmm
Click to expand...
Click to collapse
meh, I think that is wrong. many people have done exactly what it says you can do, and it doesn't work.

Makes me wonder if the boys at Samsung made a press mistake. If indeed you can't use both with the correct cable, then why make a port with 11 pins? Seems a waste of resources to me.

nightwinn said:
Makes me wonder if the boys at Samsung made a press mistake. If indeed you can't use both with the correct cable, then why make a port with 11 pins? Seems a waste of resources to me.
Click to expand...
Click to collapse
I have never seen anything from samsung saying that MHL and OTG was possible.. just speculation in websites.

It better be possible because if not all Samsung's managed to do is make us buy hugely overpriced new MHL cables when they could have kept the old type, but I guess Samsung's made some decent money giving people no option but to buy £30 MHL cables.

I hope Monoprice really is working on a cable. 35-40 USD is more than I want to pay, especially if I get a couple and/or an HDMI dock.

Geordie Lad said:
It better be possible because if not all Samsung's managed to do is make us buy hugely overpriced new MHL cables when they could have kept the old type, but I guess Samsung's made some decent money giving people no option but to buy £30 MHL cables.
Click to expand...
Click to collapse
+1
Sent from my GT-I9300 using XDA

neiliewheeliebin
Both the oem adapters are missing 2 data pins within the plug needed for simultaneous usb connectivity with mhl,I've ordered a Chinese alternative that I'm hoping will have all 11 pins,I'll report back If I have any success

neiliewheeliebin said:
Both the oem adapters are missing 2 data pins within the plug needed for simultaneous usb connectivity with mhl,I've ordered a Chinese alternative that I'm hoping will have all 11 pins,I'll report back If I have any success
Click to expand...
Click to collapse
gracias amigo.
when you get 10 posts, so you can post links, can you come back and post what you got? then I shall order a different one.
we will find the perfect cable.

neiliewheeliebin said:
Both the oem adapters are missing 2 data pins within the plug needed for simultaneous usb connectivity with mhl,I've ordered a Chinese alternative that I'm hoping will have all 11 pins,I'll report back If I have any success
Click to expand...
Click to collapse
Someone needs to find the resistor values first so the phone can use both simultaneously if it's even possible that is.

Geordie Lad said:
Someone needs to find the resistor values first so the phone can use both simultaneously if it's even possible that is.
Click to expand...
Click to collapse
that would be key. I have sent out messages to people that may know, or may be able to find out, but i have not had success.
heck, If it can be done in the terminal (turning on items) i can make a shortcut that would do it.. but i have had no success with that either.

It's not possible I think.
You can use an MHL enabled tv wich powers MHL, (so you don't need the adapter) but how do you want to split that?
You can split the cables from the samsung adapter, so you have the MHL ones(6) and the usb ones(5).
But what then?
You need to connect the MHL ones to an hdmi cable, and connect it with an MHL enabled tv. And the usb ones to an usb port for OTG.
But will that even work with this S3?, because it is designed to get power from your charger via the extra usb port on the adapter.
Maybe it only works with the adapter, and not even with an MHl enabled tv...
I think somebody needs to connect the S3 to an MHL enabled tv, if that works you can modify the adapter and use the usb as OTG.
Send from my GT-I9300 with Tapatalk

Jeurum_92 said:
Values are already figured out, but both MHL and usb output at the same time is not possible I think.
You can use an MHL enabled tv wich powers MHL, (so you don't need the adapter) but how do you want to split that?
You can split the cables from the samsung adapter, so you have the MHL ones(6) and the usb ones(5).
But what then?
You need to connect the MHL ones to an hdmi cable, and connect it with an MHL enabled tv. And the usb ones to an usb port for OTG.
But will that even work with this S3?, because it is designed to get power from your charger via the extra usb port on the adapter.
Maybe it only works with the adapter, and not even with an MHl enabled tv...
I think somebody needs to connect the S3 to an MHL enabled tv, if that works you can modify the adapter and use the usb as OTG.
Send from my GT-I9300 with Tapatalk
Click to expand...
Click to collapse
I found (and shared) the MHL value, and we already know the OTG value.. but it only seems logical there is ANOTHER value to activate both at the same time. we are postulating, the the reasoning behind the 11 pin, is to allow both. If adding just an OTG cable turned on MHL too, it would cause issues without an MHL connection. and the same with MHL activating OTG, without an OTG device connected. like i said, this is postulation at the moment, but there SHOULD be a thrid value to enable both at the same time. that value would be used by a future peice of hardware that does a whole "PC MODE".
and if it does not exist, it CAN be done, we just need more "stuff" a way to enable a special switch if you will.
some people are saying you can connect straight to an MHL enabled TV, but that has not been done yet (and since there are no 11 pin MHL cables, that are not adapters, it seem unlikell that anyone will until said cable exists. the S3 cannot send MHL signal over the usb part, it has to be either the extra 6 pins, or with the 11 to 5 pin adapter.)
essentially, the pins are there, and with some special software, or a hidden resistor value as to yet, unfound, and some custom hardware (as of now NOTHING 11 pin, has 11 pins in it) it SHOULD be possible.
but there is nothing that has been found (hardware wise) that is even modifyable to work.... yet.

What I don't understand, why does MHL only work with the power connected?
They could easily make an MHL cable with the 11 pin, and hdmi. That should work for only MHL.
Only no go I can think is that MHL drains your battery because of always having your screen on, and the MHL output.
So they decided to use the adapter with power, otherwise you can't use MHL feature very long before your battery is empty
I think inside the adapter they only use the pins for giving power, and not the full 5 pin support for OTG, and therefore OTG doesn't work when you want to connect something.
Inside the ROM they have maybe build in something that MHL will only work when power is connected.
Maybe the solution is very simple,modify the adapter so full 5 pins are connected.

USB cable "OTG" not working am I doing it wrong?

I got a Micro-USB to USB (female) cable form ebay... from China (I didn't know until I chekced later. I usually have the "UK sellers only" option checked).
Anyway, after an eternity, it arrived today. But, it doesn't work when I plug it in. Nothing happens. My Sandisk Cruzer doesn't light up when I plug it in or anything.
I was on the ninphetamin3 Kernel, and I've tried the Siyah kernel, just in case it's the kernel that was limiting functionality... Apparently it's not because it still doesn't work.
It only cost a couple of quid, but is there something I might be missing that I can check before buying another from the UK?

Kryten2k35 said:
I got a Micro-USB to USB (female) cable...
Click to expand...
Click to collapse
That is not necessarily an OTG cable... did it SAY it was an OTG cable? If not, it probably isnt. Pin 4 and 5 need to be connected (in the micro usb side) for it trigger OTG functionality. if it is not working it means one of 2 things:
1. You didn't buy and OTG cable, you just bought a cable with the ends you wanted, but without the funtionality
2. Something is broken on your phone... test that cable in another phone with OTG capability (go to a verizon store if you have to)
3. I think i remember seeing you need an app to use some flash drives (keybaords and mice work without any app, i can attest to that from experience)

http://www.ebay.co.uk/itm/320786314480?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
That's the one I got. It's 5pin, but you're right in that it doesn't say it was OTG.
I don't have another OTG compatible device to test with

I got an OTG cable and I tired loads of different things to get it working.... in the end I rebooted the S3 with a usb drive connected and it worked after that.
I'm on stock rooted LG6
This is what I got
http://www.ebay.ie/itm/130728105355...X:IT&_trksid=p3984.m1439.l2649#ht_3061wt_1163

Kryten2k35 said:
http://www.ebay.co.uk/itm/320786314480?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
That's the one I got. It's 5pin, but you're right in that it doesn't say it was OTG.
I don't have another OTG compatible device to test with
Click to expand...
Click to collapse
yep, it is just a plug adapter.
You now have 2 choices:
1. cut open the micro USB, and connect pins 5 and six
2. buy one that actually says it is an OTG
if you can wait:
http://www.amazon.com/T-Flash-Adapt...ef=cm_rdp_product?t=slickdeals&tag=slickdeals
BAM! 64 cents.
a little xtra info:
http://forum.xda-developers.com/showthread.php?t=1812609

I ordered a OTG cable now, but also soldered the one I had and made that into one too., But the OTG one will be ok to pull out in public places, lol.