Database Develop

How to Enable usb - on the go?

please tell me how to enable usb on the go . i want to attached my pen drive and my hard drive to my phone .

plug it into the phone, and u're ready to go.. hence the name usb on the go

jinnn_1989 said:
please tell me how to enable usb on the go . i want to attached my pen drive and my hard drive to my phone .
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Click to collapse
You need a USB Host to go cable - they are pretty cheap off of ebay.
USB hard drives don't always work - at minimum you will need a powered hub.
- Frank

i know wht USB on the means but how do i enable it. i have tried connecting with a pendrive with the help of the USb on the cable but it does not show .

Once you plug your on the cable in the phone will inform you that usb connecter s connected. Whatever you plug in at the other end of otg cable work run unless it is not supported.
Sent from my SCH-I500 using Tapatalk

Just plug it in and look in My files. It will show as usbstorage.

I have an official samsung OTG cable, it works fine on the SGS2, but doesn't appear on the Galaxy Note under usbstorage.
Anyone else out there having similar problems?

i had grab some ebay OtG but after unmount and remove the OTG it causes wakelock which drain alot of juice.

I am also facing problems with OTG . when i plug in the cable thr is not msg nor anything happens in phone. please could any one tell me how to enable it may be with kernel or custom rom or may be anything else.

I also want to know this as well,I have spent considerable time yesterday trying to make this work but no luck at all,I would appreciate if someone could help,as I have seen a video in this forum where the guy was able to.connect a mouse to it stating that it is supported out of the box.

I was able to get it to work with a pendrive and a mouse with no problems, but I couldn't get a keyboard or my 2.5" external drive to mount.
Details:
My OTG cable was from DealExtreme for $2.30 or something.
My pendrive was FAT32 formatted.
My mouse was a basic $10 optical one.
My 2.5" external was NTFS, which probably goes some way to explaining why it didn't work even when I gave it some extra power from my desktop PC too.
My keyboard was a standard USB. I also tried a Logitech keyboard with a wireless USB dongle but that didn't work either.
I watched a whole film off my pendrive with no issues. I messed around with the mouse a bit, but the cursor moved too slowly for my taste and the scroll wheel didn't scroll webpages, which is half the reason I'd plug a mouse in anyway.

jinnn_1989 said:
I am also facing problems with OTG . when i plug in the cable thr is not msg nor anything happens in phone. please could any one tell me how to enable it may be with kernel or custom rom or may be anything else.
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Click to collapse
If you get no message when the cable is plugged in on it's own, chances are it is a problem with the cable. I bought a cable of Ebay which didn't work, so I bought a different one and that did.
Regards,
Dave

[Q] USB OTG: usb1 found, cannot use keyboard

Hello,
I have a USB OTG cable and dell keyboard that I have tested and work in OTG mode on a Nexus 7, however i cannot get them to function with my HP Touchpad 32gb, running CM9 2.6.35, built on Sun Oct 28.
The device recognizes when I plug in anything via USB, but only as a generic Linux USB hub, and not as any particular device. Are there any steps to take to debug this? Has anyone had experience with this type of an issue?
Thanks for your help,
Cory

I don't know if this is the issue, but I know the touchpad doesn't support OTG like the the Nexus does. I think you need a Y-adapter + OTG to provide power since the micro usb port doesn't give any power to the device you connect. Someone correct me if I'm wrong though.

Apparently even a powered USB requires a powered Y cable to be properly recognized. I hacked together a quick Y cable manually, by splicing in another USB cable's power and ground (Red and black) to the respective locations on a female USB cable. Works as expected.
I am now communicating with an Arduino over Serial
Thanks!

Read this thread, should give you all the info you need:
http://forum.xda-developers.com/showthread.php?t=1582771
Basically the Touchpad has OTG but it provides no power.

wcdolphin said:
Apparently even a powered USB requires a powered Y cable to be properly recognized. I hacked together a quick Y cable manually, by splicing in another USB cable's power and ground (Red and black) to the respective locations on a female USB cable. Works as expected.
I am now communicating with an Arduino over Serial
Thanks!
Click to expand...
Click to collapse
I'm curious if you are able to charge with this cable hack while using usb devices?
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

ZedZardoz said:
I'm curious if you are able to charge with this cable hack while using usb devices?
Sent from my SAMSUNG-SGH-I317 using xda app-developers app
Click to expand...
Click to collapse
if so , he is the first of the many many many who has used this cable..HPTP just is not set up for charge + usb data at the same time

amkaos said:
if so , he is the first of the many many many who has used this cable..HPTP just is not set up for charge + usb data at the same time
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Click to collapse
Agreed. I think people just are not stating reality regarding the ability to charge and use OTG Hosting to USB devices at the same time.
My goal here has been to attach a flash drive with video/audio media and play & charge on long flights. It looks like play, charge are mutually exclusive on my beloved TouchPad.
I've asked for the specific confirmation of this from this YouTube but have never had the poster reply:
https://www.youtube.com/watch?v=p10LgZFIawo&feature=BFa&list=PLCED27D4A23068E04&index=7
There are devices out there that have very advanced micro USB device implementations. Sadly the HP is only superficially supportive.
I for one cannot wait to get my SGN2 smart dock which offers:
Charging
OTG (x3 USB)
Audio out
HML HDMI out
Docked Profile

OTG w/ charging

like most MHL cables that include the charging port (where you just plug in from wall), is there anything like this for OTG??
tried finding and searching but nothing.....

If you're looking for power going to the USB device, then you can use this.
If you want to charge your Note while using the OTG feature, then I've not yet come across anything like that.

Just wondering if it is possible to charge the Note 2 while using the OTG yet? I'm in my car all the time and use an external SD card. My 64gig internal card is already full.

cajunflavoredbob said:
If you're looking for power going to the USB device, then you can use this.
If you want to charge your Note while using the OTG feature, then I've not yet come across anything like that.
Click to expand...
Click to collapse
How about a scenario where I have External Battery charger and OTG adapter with usb stick. I want to watch the movie on usb stick while also have External battery connected charging the phone. I guess it's the same problem as not being able to charge up phone from any external source while using another device connected to OTG?

vectron said:
How about a scenario where I have External Battery charger and OTG adapter with usb stick. I want to watch the movie on usb stick while also have External battery connected charging the phone. I guess it's the same problem as not being able to charge up phone from any external source while using another device connected to OTG?
Click to expand...
Click to collapse
You could make your own micro USB OTG cable. I still haven't seen one for sale anywhere.

cajunflavoredbob said:
You could make your own micro USB OTG cable. I still haven't seen one for sale anywhere.
Click to expand...
Click to collapse
Oh, I don't have issues with OTG cables. I have adapter and cables, and modified cables before: http://forum.xda-developers.com/showthread.php?t=2107985
I just want to figure out how I can watch movie from usb-stick while charging my phone at the same time. There seems to be no solution for that yet? Or are you suggesting there is a way to make a custom cable to do that? I think once you attach OTG cable to connect a peripheral device, you turn Note 2 into host and it will not accept charging from micro-usb port. No way around it

vectron said:
Oh, I don't have issues with OTG cables. I have adapter and cables, and modified cables before: http://forum.xda-developers.com/showthread.php?t=2107985
I just want to figure out how I can watch movie from usb-stick while charging my phone at the same time. There seems to be no solution for that yet? Or are you suggesting there is a way to make a custom cable to do that? I think once you attach OTG cable to connect a peripheral device, you turn Note 2 into host and it will not accept charging from micro-usb port. No way around it
Click to expand...
Click to collapse
Oh, I understand what you mean now. In that case, you are correct. You cannot charge your phone and use an external thumb drive at the same time through the usb port. When you plug in an external drive, your phone switches the USB power cables to send the juice instead of receive it.
The only ways I know around that are to use a wireless charge stand or the desk dock.

cajunflavoredbob said:
Oh, I understand what you mean now. In that case, you are correct. You cannot charge your phone and use an external thumb drive at the same time through the usb port. When you plug in an external drive, your phone switches the USB power cables to send the juice instead of receive it.
The only ways I know around that are to use a wireless charge stand or the desk dock.
Click to expand...
Click to collapse
Isn't this exactly what sammys smartdock does? Charge and otg simultaneously?

farfromovin said:
Isn't this exactly what sammys smartdock does? Charge and otg simultaneously?
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Click to collapse
Yep. Not possible with just a cable. It needs a microprocessor to regulate the current in and out. Devices plugged into the dock are powered by the dock's power, not the phone's.

cajunflavoredbob said:
Yep. Not possible with just a cable. It needs a microprocessor to regulate the current in and out. Devices plugged into the dock are powered by the dock's power, not the phone's.
Click to expand...
Click to collapse
I hear what your saying, but looking at threads in the S3 section like this one: http://forum.xda-developers.com/showthread.php?t=1953061 got me thinking... I'm just trying to make an audio cable for my car that charges and has 3.5mm out to my radio. And I need it to work with every 4.1.X kernel and above, especially stock.

farfromovin said:
I hear what your saying, but looking at threads in the S3 section like this one: http://forum.xda-developers.com/showthread.php?t=1953061 got me thinking... I'm just trying to make an audio cable for my car that charges and has 3.5mm out to my radio. And I need it to work with every 4.1.X kernel and above, especially stock.
Click to expand...
Click to collapse
If you get a pinout for the s3, might be able to modify a cable to do both.

Raspberry pi , Power Supply

I want your experience in psu schematics.This is my plan, I will buy a cheap usb hub,,I will power it with dvd player smps 5V at the same time it will supply parallel to pi micro usb socket.My question is ,Do you cut the upstream power from usb hub when you are connecting the hub? do you left it as it is,,may be a diode is present.

PREMOLIKES said:
I want your experience in psu schematics.This is my plan, I will buy a cheap usb hub,,I will power it with dvd player smps 5V at the same time it will supply parallel to pi micro usb socket.My question is ,Do you cut the upstream power from usb hub when you are connecting the hub? do you left it as it is,,may be a diode is present.
Click to expand...
Click to collapse
While I can't answer specifics on what wires to connect I would recommend taking a look at this great guide to building your own PSU for the RPi http://elinux.org/RPi_5V_PSU_construction. This includes circuit diagram layouts.
Sent from my SCH-I535 using xda premium

I have my Pi powered from one of the normal USB ports. The power comes from the 'power' cable of the USB hard disk that is attached to the Pi. The hard disk's main USB cable is plugged into a powered USB hub.
Attached an image.

Do we need push more mA into her. mines running off my Tab2`s charger at the moment which is 2 Amps..??

lodger said:
Do we need push more mA into her. mines running off my Tab2`s charger at the moment which is 2 Amps..??
Click to expand...
Click to collapse
That should be enough amps as most phone and tablet chargers will provide the 5-5.6V of power needed for the RPi to function properly.
Sent from my SCH-I535 using xda premium

2A will be sufficient to power a couple of peripherils including pi itself.

powered USB hub...
Hey guys, it seems ive got power issues with my pi, everything works fine if i just use the two usb ports, but as soon as i plug in my powered usb hub i get keyboard errors, bluetooth dropping, and wifi connection issues, all symptoms of low power. anyone having this issue with thier Raspi & powered usb hub?

justanotherlurker said:
Hey guys, it seems ive got power issues with my pi, everything works fine if i just use the two usb ports, but as soon as i plug in my powered usb hub i get keyboard errors, bluetooth dropping, and wifi connection issues, all symptoms of low power. anyone having this issue with thier Raspi & powered usb hub?
Click to expand...
Click to collapse
Exactly how do you have everything plugged in?
Assuming power to pi from one source, hub to the USB port and your accessories all to the hub: See if you can get your pi to boot with the hub plugged in to the accessory port but nothing to the power micro USB.
I suspect the hub may be causing issues by backfeeding power through the accessory port. This test will tell.

powered USB hub...
cjdalessio said:
Exactly how do you have everything plugged in?
Assuming power to pi from one source, hub to the USB port and your accessories all to the hub: See if you can get your pi to boot with the hub plugged in to the accessory port but nothing to the power micro USB.
I suspect the hub may be causing issues by backfeeding power through the accessory port. This test will tell.
Click to expand...
Click to collapse
You guessed correctly to how i had it all set up. I did exactly what you said, tried booting, but got nothing. i dont think its backfeeding, any other suggestions? this one leaves me scratching my head.

justanotherlurker said:
You guessed correctly to how i had it all set up. I did exactly what you said, tried booting, but got nothing. i dont think its backfeeding, any other suggestions? this one leaves me scratching my head.
Click to expand...
Click to collapse
Are you using seperate power for usb hub ?If it is so you should cut the power terminal from usb hub to pi.See that you are supplying good current to the hub.

Manual USB OTG working

Hi,
As you know, the Nexus 4 doesn't support USB OTG, meaning you can't use it with USB drives, gamepads, etc.. One reason is that the device doesn't seem to provide the neccessary 5V, the other reason is that it's not supported by the kernel.
So, I've been digging a bit, and now I can claim partial success! It's possible to supply the 5V yourself, and then activate USB host mode manually. It's a bit cumbersome, but for the beginning better than nothing. I tried a mouse and USB drives.
I should warn you that this is just a proof of concept and nothing that you'll want to use on a daily basis. Regular USB doesn't work properly while running this kernel, and I haven't checked battery consumption. Also this is based on Android 4.2.1, and if you have 4.2.2 you might not be able to make calls. That shouldn't be a problem as this is for testing only, though. Just let me say, I can't guarantee for anything, and I'm not responsible if you brick or blow up your phone.
You'll need:
- A USB OTG cable
- A USB Y cable to provide the 5V (It has two USB-A plugs and one USB-A socket.)
- My custom kernel
- Unlocked bootloader
- Android developer tools (adb, fastboot)
Load the boot image on your phone (this is not permantent):
Code:
$ fastboot boot myboot.img
Connect everything as follows (should be obvious):
- Y cable power plug (typically red) to the PC or adapter
- Other Y cable plug into the OTG cable
- OTG cable into the phone
- USB device into the Y cable socket
You need a remote shell on your device. Use adbWireless or similar to enable ADB over WiFi, then do:
Code:
$ adb connect 192.168.0.108:5555
(or whatever your phone's IP is)
$ adb shell
Now you should be on your phone. Do
Code:
[email protected]:/ $ ls /sys/kernel/debug/msm_otg/
and you should see 'mode' if the new kernel works. Now become superuser and enable USB host mode:
Code:
[email protected]:/ $ su
[email protected]:/ $ echo host > /sys/kernel/debug/msm_otg/mode
To disable USB host mode, use "none" or "peripheral". Note that at this point, I couldn't get it to go into regular USB mode. This means that MTP and adb over USB doesn't work yet.
Connect a device, and you should see more than two entries under "lsusb". Congratulations, your Nexus 4 has just recognized it's first USB device! If you install Stickmount (you have to sideload it since it's marked as not compatible), you can mount USB flash drives. Nexus Media Importer doesn't seem to work, though.
How does this work?
Basically, I just added the following line to the beginning of msm_otg_debugfs_init in msm_otg.c:
Code:
motg->pdata->otg_control = OTG_USER_CONTROL;
This enables the mode file in debugfs I use for mode switching. The next step would be to enable manual mode switching while keeping regular USB support, which shouldn't be too hard. Later down the line we can think about switching automatically on cable insertion, and maybe event getting 5V out of the device, but that would be a lot harder.
So, try it out, let me know if it works for you, and feel free to tinker around and improve what I've got!

Nice to see some progress going. Only thing that irks me is the Y cable though, kinda defeats the purpose of OTG to me...
Thanks a bunch for your work though!
Sent from my Nexus 4 using xda premium

You are a genius. :good:
Just connected a powered USB-HUB and a mouse to my OTG cable, flashed the kernel and typed the commands directly with a terminal app on the device.
It simply works !!!

Awesome development, one of my biggest gripes was the lack of USB OTG, I just assumed it was included as stock, that's why part of the reason I purchased this device.

This is awesome. Going to have to order some cables now. Since we have to supply power anyway, is it possible to support usb-otg + charging? Figure the phone is "too thin" anyway... I'll probably be making a 64gb microsdxc + battery case for the phone. Hello extended battery life.

Great work, I was just looking for this yesterday. Would it work with a USB dac (Assuming I had a powered usb hub)? Just asking because I think usb audio is often overlooked, and I would really like to have it.

Nice!

It would also be interesting to see if the slimport adapter allows otg pass through (their website says it does)... Then that's HDMI +charging +mouse/keyboard. Even miracast + mouse/keyboard would be awesome
Sent from my Nexus 4 using Tapatalk 2

Flynny75 said:
Even miracast + mouse/keyboard would be awesome
Click to expand...
Click to collapse
we've already got that, haven't we?

Finally! Now I will get to use my 1TB Portable HDD!!
My 8 gig is FREE! Lol
Sent from my Nexus 4 using Tapatalk 2

I'd like to be sure I'm getting a good USB Y cable. I see a few on Amazon, some have the word 'Power' in them, some don't. Most don't have a red plug. Are there some specific characteristics I should look for in the description to know that it's suitable for this purpose?
Here's one example that does NOT say 'Power' in its description.
http://www.amazon.com/OEM-UTStarcom-USB-Adapter-Cable/dp/B002W8EDOM/ref=pd_sim_e_2
Thanks, CaptainMuon, for your terrific work!
EDIT: After reading Scorpio16v"s post (and watching his video...thank you!), I thought I would try with a powered hub, since I don't have the Y cable. Also, I used the terminal emulator instead of adb, as he suggested. YES! It worked with a USB micro sd card reader adapter (I had bought it from ebay specifically for this Nexus 4 since I knew there was no sd card slot). That required stickmount, as CaptainMuon mentioned. Then I tried a USB mouse, and that worked also. This is great!
I'd still like to know more about the Y cable, as I asked above, even though this other method worked well for me.

Wonderful!!

R: Manual USB OTG working
Can the USB hub be non powered?
Inviato dal mio Nexus 4

Cice96 said:
Can the USB hub be non powered?
Inviato dal mio Nexus 4
Click to expand...
Click to collapse
When I powered off my USB powered hub, neither the USB Micro SD or the USB mouse worked.

Greaaatt news and excellent development on this front sir.
I was eagerly waiting for someone to come up with a solution to this topic.
But coming back I've read in so many places that a kernel can be tweaked so as to supply 5V to the socket!!(I'm considering that is the problem here. With power supply its working).
??
Sent from my Nexus 4 using xda app-developers app

Awesome, my one gripe with the phone is now (almost) gone!:good:
Any chance it it'll work with non-OTG cables/adapters (The plain USB host ones which don't have that extra pin)?

Just posting to thank you for all the time and effort you must of put in.

ziddey said:
This is awesome. Going to have to order some cables now. Since we have to supply power anyway, is it possible to support usb-otg + charging? Figure the phone is "too thin" anyway... I'll probably be making a 64gb microsdxc + battery case for the phone. Hello extended battery life.
Click to expand...
Click to collapse
It seems to be charging in USB host mode. (In my Y cable, the +5V line connects all three plugs, so the phone gets juice too. Not sure if that's always the case.) We have to do some testing to see if it charges at normal speed, etc.
eiriklf said:
Great work, I was just looking for this yesterday. Would it work with a USB dac (Assuming I had a powered usb hub)? Just asking because I think usb audio is often overlooked, and I would really like to have it.
Click to expand...
Click to collapse
I guess, if it is supported on any other android device, it should be possible here. Would be great if someone with a DAC would try it!
Flynny75 said:
It would also be interesting to see if the slimport adapter allows otg pass through (their website says it does)... Then that's HDMI +charging +mouse/keyboard. Even miracast + mouse/keyboard would be awesome
Click to expand...
Click to collapse
Dito. If someone has such an adapter, I'd be excited to know if it works.
sga999 said:
I'd like to be sure I'm getting a good USB Y cable. I see a few on Amazon, some have the word 'Power' in them, some don't. Most don't have a red plug. Are there some specific characteristics I should look for in the description to know that it's suitable for this purpose?
Here's one example that does NOT say 'Power' in its description.
http://www.amazon.com/OEM-UTStarcom-USB-Adapter-Cable/dp/B002W8EDOM/ref=pd_sim_e_2
Click to expand...
Click to collapse
Hmm, I don't know how you could make a Y cable that doesn't provide power from one end, and data from the other . It should work, but I know there are a lot of scam/poor quality cables out there, so I can't guarantee it. I've got this one:
http://www.amazon.de/Delock-Adapter...=sr_1_4?s=ce-de&ie=UTF8&qid=1361096352&sr=1-4

Yes good through bro...well done
But ohhhh man...i hate to use extra stuff like y cable and a powersource....
F**k google
Sent from my Nexus 4 using Tapatalk 2

you should post this to development section ;
let's see if other dev can also contribute to make a nice working kernel with these stuff;
without any bugs you had mention above.
BTW ;
Nice work Bro. :good:
by the way ; i can use my powerbanks as the power source. so i don't need any land electric sources.
not yet try it, i will need to find the XY cable first ( non powered USB Hub will do fine, and powered by the 11000Mah Powerbanks )