Yesterday I made a custom usb Y cable and connected it to a USB OTG adapter to our phone and supplied a external +5v power then connected USB keyboard and mouse both worked.
But when i tried connecting my pen drive it did not shown any sign of life.
I searched and narrowed these methods:
http://www.chinadigitalcomm.com/how-to-mount-usb-flash-drives-t1865.html
http://forum.xda-developers.com/showthread.php?t=1334444
http://forum.xda-developers.com/showthread.php?t=997187
According to these two methods I should get sda1 and sda 2 in dev/block after connecting a USB pen drive but that is not happening.
Then I searched and found out that our kernel should have UMS enabled to mount any usb storage device as stated here:
http://forum.xda-developers.com/showpost.php?p=22597744&postcount=3
I am really confused now, I know I have enabled USB Host mode as usb mouse and keyboard are working but dont know how to modify our kernel to get usb pen drive work.
prasannapmv said:
Yesterday I made a custom usb Y cable and connected it to a USB OTG adapter to our phone and supplied a external +5v power then connected USB keyboard and mouse both worked.
But when i tried connecting my pen drive it did not shown any sign of life.
I searched and narrowed these methods:
http://www.chinadigitalcomm.com/how-to-mount-usb-flash-drives-t1865.html
http://forum.xda-developers.com/showthread.php?t=1334444
http://forum.xda-developers.com/showthread.php?t=997187
According to these two methods I should get sda1 and sda 2 in dev/block after connecting a USB pen drive but that is not happening.
Then I searched and found out that our kernel should have UMS enabled to mount any usb storage device as stated here:
http://forum.xda-developers.com/showpost.php?p=22597744&postcount=3
I am really confused now, I know I have enabled USB Host mode as usb mouse and keyboard are working but dont know how to modify our kernel to get usb pen drive work.
Click to expand...
Click to collapse
you won't be able to modify our kernel with our locked bootloader, but your problem could be elsewhere. the drive requires more power than a mouse or keyboard, so it just may not be getting enough. will your power supply give a full 500mA that is what a normal usb port gives, and is probably overkill for a flash drive, but it would prove whether that is the problem or not.
Does the drive have a light on it that usually turns on when you plug it in? if so, does it come on when you plug it in with your splitter into the phone.
It may be that it is just not supported on our phone, but I think a power problem is much more likely.
EDIT: once you think it is getting power, check for it in /dev/block by running this in terminal emulator. you can check before and after to see what changes, if anything in case it is not named /sdxx
Code:
ls /dev/block
lkrasner said:
you won't be able to modify our kernel with our locked bootloader, but your problem could be elsewhere. the drive requires more power than a mouse or keyboard, so it just may not be getting enough. will your power supply give a full 500mA that is what a normal usb port gives, and is probably overkill for a flash drive, but it would prove whether that is the problem or not.
Does the drive have a light on it that usually turns on when you plug it in? if so, does it come on when you plug it in with your splitter into the phone.
It may be that it is just not supported on our phone, but I think a power problem is much more likely.
EDIT: once you think it is getting power, check for it in /dev/block by running this in terminal emulator. you can check before and after to see what changes, if anything in case it is not named /sdxx
Code:
ls /dev/block
Click to expand...
Click to collapse
That is right, our phone does not provide power on the usb connection, it is a one way charge only, no matter which cable you use, it is an issue with moto's implementation of the USB protocol.
---EDIT---
I do think that I read that someone was able to get it working by using a powered usb hub attached in between the A2 and the usb device. WARNING some assembly/dis-assembly was required!
jimbridgman said:
That is right, our phone does not provide power on the usb connection, it is a one way charge only, no matter which cable you use, it is an issue with moto's implementation of the USB protocol.
Click to expand...
Click to collapse
devices do work as long as you provide external power, which is what he has done. basically you cut the power wires out of the cable and hook them up to a power supply, thus givng the power and giving the data to the phone. Since it supports host mode, it SHOULD work with a flash drive as well as mice, I have heard of people doing it.
lkrasner said:
devices do work as long as you provide external power, which is what he has done. basically you cut the power wires out of the cable and hook them up to a power supply, thus givng the power and giving the data to the phone. Since it supports host mode, it SHOULD work with a flash drive as well as mice, I have heard of people doing it.
Click to expand...
Click to collapse
I know this does not explain it, but it is mentioned that a powered hub is needed.... This person was thinking of making basically a DIY HD doc, and there was someone else on here that has done it too, but I can't find that post and I can't remember the users name.
http://forum.xda-developers.com/showthread.php?t=1462541
A cheap hub will do the job much better, and I have heard of other users having trouble with the otg cable and usb storage.
Just more information to think about and look into.
Try this
https://play.google.com/store/apps/details?id=eu.chainfire.stickmount&hl=en
Motorola lied and I'm still locked mb865
I've tried every single thing that I can to make Usb flash drive work but its something in our software that is restricting it detect any of my storage devices.
I saw one more thread yesterday it was for XOOM which says kernel has to be modified in order to get usb Drives work:
http://forum.xda-developers.com/showthread.php?t=1068999
I now understand that with locked bootloader it will not be possible to modify the kernel so i am abandoning this project and hope we find a way to unlock bootloader soon in the future.
You can try by using a self powered hub which provide power to devices, If it works do post the results as I am also looking forward to use USB HOST feature
john1989 said:
You can try by using a self powered hub which provide power to devices, If it works do post the results as I am also looking forward to use USB HOST feature
Click to expand...
Click to collapse
Ive done this. I have a powerd usb hub, otg cable hooked up and it does not recognize drives or mice. None of it is working. Beginning to think there is not a way to make this work.
It does work when you connect pen drive to lapdock so its not software/firmware/kernel issue.
Easy solution: buy a lapdock or a media dock with usb ports and connect your drive there.
Sent from my MB865 using Tapatalk 2
I did finally get this to work.
One caveat, you have to connect the power directly from the cable to the otg cable. Basically power the hub and the otg cable from one line even though they are connected. This is what did the trick for me.
Ill post pictures when i can if its still foggy.
Sent from my MB865 using xda premium
Rebelj12a said:
I did finally get this to work.
One caveat, you have to connect the power directly from the cable to the otg cable. Basically power the hub and the otg cable from one line even though they are connected. This is what did the trick for me.
Ill post pictures when i can if its still foggy.
Sent from my MB865 using xda premium
Click to expand...
Click to collapse
Update and edit. No automounting at all. Have to use an external program to mount. Been trying to debug this for a while but the OS is not seeing the usb device.
Using USB host diagnostics Android api does not detect the device. Although the claims and classes were found. Kernel is in the green here too. Unfortunitely this makes it so that the USB device cannot be used by 3rd party programs. Still working on figuring this out. I saw a post about shorting out the 4 and 5 line of the microusb cable. Going to try that see where it goes.
Related
I've been searching all over and I cant find a definitive answer on this.
I have a Toshiba portable USB hard drive that gets its power from the USB connector (it does not have a separate power supply).
Can I hook this up to my Xoom and watch movies/tv shows from it? Does the Xoom support USB hard drives or thumb drives at all?
Sorry in advance if this has already been answered.
Thanks
Yes but you need a USB OTG cable. Not sure if the Xoom will power an external hard drive that runs off of USB only though, you might need to get one if those cables that splits off for power.
I can't get anything to work, even with a USB OTG cable, and I have 3.2 installed.
When I bought the cable it said this ...
This adapter allows you to plug a USB memory stick pen drive so you can play music, videos, backup & transfer files and view photos.
Click to expand...
Click to collapse
The Motorola forum says it can't be done, yet.
Others say you need to root the phone.
I'm sure you need to unlock and install tiamat rom I think?
I'm new to these forums as of today,
But i've read around the forums, and it seems to me that 3.2 doesn't support USBhost, and therefore PENdrives/USBHDD's cannot be used.
As Kippui stated, you will need to use a custom ROM with USBhost support, before you will be able to use the HDD at the very least
oRAirwolf said:
I've been searching all over and I cant find a definitive answer on this.
I have a Toshiba portable USB hard drive that gets its power from the USB connector (it does not have a separate power supply).
Can I hook this up to my Xoom and watch movies/tv shows from it? Does the Xoom support USB hard drives or thumb drives at all?
Sorry in advance if this has already been answered.
Thanks
Click to expand...
Click to collapse
If it has no separate power supply then no, the xoom doesn't put out enough power
Sent from my ADR6400L using Tapatalk
my wd passport works fine.
I use a motorla host cable(cheap one ship from china a no go)
I'm rooted
use usb mass storage watcher app
I'm on moray rom
superchilpil said:
If it has no separate power supply then no, the xoom doesn't put out enough power
Sent from my ADR6400L using Tapatalk
Click to expand...
Click to collapse
Not true about the newer Passports, for example. I have a 1st generation 250GB Passport that can only work if I use a powered hub, but my brand new USB3 650GB Passport works fine and is fully powered by the Xoom.
Please note, I am unlocked, rooted, and running a custom Rom/kernel that supports USB Host Mode.
Stock Honeycomb does not support USBOTG/host mode.
xoom 2 support usb otg with stock firmware
I would go on eBay and buy an Angled USB OTG cable. I got two of them on their for around $7-$8. It's better because you don't have a wire sticking out of your tablet.
I'm paranoid on breaking my ports.
mdcykkk9 said:
xoom 2 support usb otg with stock firmware
Click to expand...
Click to collapse
Well that's something in it's favor, anyway.
I would like to know if this exists, as if it doesn't I was thinking about making it. As the title may be confusing to understand, maybe describing what I'm trying to do will be easier to explain.
I going to create a dock in a family mini van for a tablet. This tablet will have limited storage space, but has usb otg capabilities. Thus hooking up a flash drive with movies on it would be the goal.
Now running a female to male cable would be fairly easy, however I want to be able to have the tablet charge and still use the usb port to access the usb cable. Thus I need a cable that may be spliced cable with three ends. Where two ends are for usb transfer and another to supply power to the devices. Or if there is another solution, I am up for it.
Sent from my SGH-I777 using xda app-developers app
I have seen Y cables for such a purpose.
If you want to do charge/power and USB host at the same time
you will need the plug into the Android to be an OTG plug with a grounded ID pin.
The other end will go to the flash drive.
If you apply 5V to the Vbus/Gnd your device has the possibility to use this power.
Of course this is an odd situation and it may ignore the 5V and only use its own battery.
Experimenting will show you if this will work without a driver hack.
Anyone manage to mount a usb drive on a a510?
I can do it on my a500, but not my a510.
Any suggestions?
It does not seem to detect the drive at all.
Works fine for me using the included USB-OTG cable. Just plug it in and it's detected.
Same here. Just plug it, and the system mounts it automatically.
Are either of you rooted?
Did not try before root.
For some reason on my 700 it doesn't say they're mounted, but when I open the files app and click the triangle on the left, it is there ready to go. I've had this happen with 4 devices now.
Sent from my A700 using XDA Premium HD app
I am beginning to think my USB-OTG cable is bad.
Using dmesg I can see the cable being plugged in. It registers as a USB hub. That implies to me the USB subsystem is working.
When I plug a device into the cable, dmesg does not show anything. So I suspect the cable is bad.
Ebay here I come.
snickle said:
I am beginning to think my USB-OTG cable is bad.
Using dmesg I can see the cable being plugged in. It registers as a USB hub. That implies to me the USB subsystem is working.
When I plug a device into the cable, dmesg does not show anything. So I suspect the cable is bad.
Ebay here I come.
Click to expand...
Click to collapse
There are some firmware that cannot read mass storage if USB debugging is on. Have you tried disabling that, restarting, then trying again?
To answer the earlier question btw, I am not rooted yet. (I heard people having problems getting OTA on their rooted tabs, so might as well stay stock with mine. Especially since we don't have a lot of development going on. Yet.)
Are there any Roms that support usb otg.
I'm on clean rom 2.5 and can't get it to work. Also the few Roms I have tried it hasn't worked.
Sent from my SCH-I535 using xda app-developers app
CleanRom 2.5 (and 2.1 before that) and it works fine for me. Higher-drain usb devices might need their own power source.
What kind of usb otg are you using maybe I have the wrong cord. Did you have to enable any options?
bsannes said:
What kind of usb otg are you using maybe I have the wrong cord. Did you have to enable any options?
Click to expand...
Click to collapse
I used what I thought was a non-OTG micro-usb-to-usb adapter, and then a cheapo OTG cable and both worked with a wired Xbox 360 controller. The cable also worked with a flash drive. I haven't really tried any other devices.
The ones I used were:
http://www.amazon.com/T-Flash-Adapt...UTF8&qid=1350406382&sr=8-1&keywords=otg+cable
and something like this:
http://www.amazon.com/SANOXY-Micro-Male-Female-Adapter/dp/B0027YYMU6/ref=pd_sim_cps_8
I didn't enable/disable anything when I did the tests -- it just worked. Possibly I had done something earlier, but I can't remember anything specific, and haven't done any specialized hacks for this.
Yeah I have the same cord odd. Oh well .
Thank you for taking the time to supply the links.
Is it possible to attach a powered hub to
A) Attach higher power-requirement devices that do not have external power
and/or
B) Attach multiple devices for simultaneous use (say, a keyboard and a mouse
??
(my USB OTG cables are in the mail)
crabapples said:
Is it possible to attach a powered hub to
A) Attach higher power-requirement devices that do not have external power
and/or
B) Attach multiple devices for simultaneous use (say, a keyboard and a mouse
??
(my USB OTG cables are in the mail)
Click to expand...
Click to collapse
I *believe* both answers are "yes". You can attach a usb hub. A powered one should give power to the devices, or you could try a "y" usb cable to provide power as well.
btw, here's a video showing off some of the capabilities (i believe this is the international version):
http://www.youtube.com/watch?v=46IiRyigUH0
---------- Post added at 02:39 PM ---------- Previous post was at 02:37 PM ----------
bsannes said:
Yeah I have the same cord odd. Oh well .
Thank you for taking the time to supply the links.
Click to expand...
Click to collapse
Shoot. I guess I'm not sure what else to try so hopefully someone else can chime in. I haven't tested it out recently, but I'll let you know if I happen to discover anything.
Works fine for me...just plug the otg cable in (I had one from my old fascinate I got off Amazon for like 3 dollars...and I can either plug a single item like a mouse or flash drive straight into it or a hub that can be powered or not...if you plan on using an external hard drive is suggest plugging it in...I believe the phone holds up to like 6usb connections at once but don't quite me on the exact number...I have had a mouse, keyboard, flash drive, sd card reader, and second phone all plugged in at once...only think I've found is that not all usb hubs will work for some reason...I use a 30 dollar (at bestbuy) belkin 6 port hub and never had a problem...to have it powered though you have to plug the actual power cable on the hub into a power source and run a usb cable from the hub to otg cable...as far as I know every room should support this...I used liquid smooth which is an aosp rom and it works great, also works great on any tw Rom as the capability is built into the phone...hope this helps anyone with questions about this...only think I haven't tried is a hard drive mainly because I have no need to buy one but it should work...and if it means anything I use all 2.0 cables and accessories, no 3.0 or 1.0
Sent from my blackened liquid galaxy
Anyone know of a solution or maybe a custom rom that has this feature support?
Or wireless charging maby
datder said:
Anyone know of a solution or maybe a custom rom that has this feature support?
Click to expand...
Click to collapse
Technically it does not make any sense. your device switches to host mode when you plug in an usb stick or sth else. such devices won't deliver any power to your device. but on the contrary such devices need a power source or won't do anything. if your device don't deliver power to a USB stick you won't be able to read/write any data of/to it.
WoKoschekk said:
Technically it does not make any sense. your device switches to host mode when you plug in an usb stick or sth else. such devices won't deliver any power to your device. but on the contrary such devices need a power source or won't do anything. if your device don't deliver power to a USB stick you won't be able to read/write any data of/to it.
Click to expand...
Click to collapse
That doesn't make any sense. So no power in USB host? What about the hundreds of devices that do it, like a cheap fire tv? Many devices would be rendered useless without this ability.
Reason phones dont have the feature is due to having a battery afaik.
TimmyP said:
That doesn't make any sense. So no power in USB host? What about the hundreds of devices that do it, like a cheap fire tv? Many devices would be rendered useless without this ability.
Reason phones dont have the feature is due to having a battery afaik.
Click to expand...
Click to collapse
You know what host mode means? Your phone enters the host mode when plugging in an USB stick or sth else that gets connected by an OTG adapter. Should the USB stick charge my phone??
If you connect two phones then the used cable/the order they get connected will decide which one enters the host mode and powers the other device.
...and if you connect your phone with a PC/laptop/TV/Bluray/Hifi then your phone gets charged because your phone isn't in host mode then.
WoKoschekk said:
You know what host mode means? Your phone enters the host mode when plugging in an USB stick or sth else that gets connected by an OTG adapter. Should the USB stick charge my phone??
If you connect two phones then the used cable/the order they get connected will decide which one enters the host mode and powers the other device.
Click to expand...
Click to collapse
Do you know what a charging OTG cable is? USB stick and charging... What are you talking about?
TimmyP said:
Do you know what a charging OTG cable is? USB stick and charging... What are you talking about?
Click to expand...
Click to collapse
What are you talking about? idk...
Using OTG and charging can work simutaneously, technically... But generally devices don't support that... When you connect OTG, phone goes to host mode and provides power to external device... When a charger is connected, it goes to client mode and can receive power... There are hubs out there that have USB ports, as well as charging port that claim to charge your phone while using devices connected... But they don't work on all devices... I had a tablet long time ago, and it did not support that... It would either charge, or go to OTG mode, but not both....But some folks with different tablets claimed to have that hub working both as OTG as well as charger simultaneously... As far as tablets are concerned, my guess is that this feature could be available more frequently since the need to use keyboard/mouse/other external devices is more for tablets than it is for cellphones... So I think it would not be possible with OnePlus 9's kernel...