Hello,
I have found that some devices (Phones, Tablets) do not provide power for peripherals while using an OTG host cable. In this case, the use of an external Hub or power source fixes the issue. Does anyone have a list or can lead me to a webpage which shows which devices would need the external power?
I tried an Atrix 4G but every device I tested needed an external power source provided by a USB hub.
Thanks
Related
Hi
Can someone answer if USB OTG is supported on the One V
using stock kernel and ROM?
Regards
max
EDIT: After some searching I found that "official" it is not suported
What surprises me is that in the kernel configuration of the stock
kernel all options are set that I would assume to allow OTG
e.g. there is something like
...
CONFIG_USB_MSM_OTG:
Enable this to support the USB OTG transceiver on MSM chips
...
Would be nice if someone could enable this for One V. This kernel project is enabling OTG for One X http://forum.xda-developers.com/showthread.php?t=1640532
Otg only works in bootloader....
Sent from my HTC One V using XDA
Hy
Actually we are talking here about USB-Host support and not USB-OTG
regards
max
maxwen said:
Hy
Actually we are talking here about USB-Host support and not USB-OTG
regards
max
Click to expand...
Click to collapse
Isn't it the same?
USB On-The-Go, often abbreviated USB OTG, is a specification that allows USB devices such as digital audio players or mobile phones to act as a host allowing a USB flash drive, mouse, or keyboard to be attached and also connecting USB peripherals directly for communication purposes among them.
http://en.wikipedia.org/wiki/USB_On-The-Go
Hi
hlavicka82 said:
Isn't it the same?
Click to expand...
Click to collapse
USB-OTG also means that you dont necessarily need a powered hub to use it AFAIK
And USB-OTG means that "both sides" can act as a client or a host
From your link above
...
USB OTG defines two roles of devices: OTG A-device and OTG B-device. This terminology defines which side supplies power to the link, and which is initially the host. The OTG A-device is a power supplier, and an OTG B-device is a power consumer. The default link configuration is that A-device act as USB Host and B-device is a USB peripheral. The host and peripheral modes may be exchanged later by using HNP. Because every OTG controller supports both roles, they are often called "Dual-Role" controllers rather than "OTG controllers"
...
Whereas USB-Host means that the android device is always the host
Since the HTC is not providing power on its USB port you always
need to use a powered usb hub in this case.
I am pretty sure that we can have USB-Host on the V since other devices
using exactly the same chipset can do it. But I still need to do some investigation
regards
max
Hi Guys
See attached screenshot and notice the "mouse pointer"
So it means we will have USB host support!
Actually not much was "missing" the guys at HTC just
"forgot" to register the usb host driver on init
At the moment the "mode" musst be switched manually
between "host" and "peripheral" which means e.g. charger a.s.o
The automatic switch based on using a OTG cable is not working
or I have the wrong cable
SO I was able to connect a active hub with a mouse and it works
Next thing will be a usb storage device
I will still need some more time to finalize this.
This will then continue in the Titanium-KISS kernel thread
regards
max
Lol why do you have an app for screen shots?
Sent from my GT-P7500 using xda app-developers app
Hi
Just a short update
-OTG cable detect working
that means switching between host and peripheral (normal) mode works
automatically. No need for a script anymore
-USB keyboard tested and works
-USB storage is still killing me
regards
max
Hi
Update:
http://forum.xda-developers.com/showthread.php?goto=newpost&t=1794497
Regards
max
Hi
Just found a nice other xda thread about USB host
http://forum.xda-developers.com/showthread.php?t=1820375
Info there applies nearly 1:1 to KISS kernel
regards
max
Hey...i am on stock rom and kernel..can uab otg work for me..if yes then tell me the setup...
Sent from my HTC One V using Tapatalk 2
I also wan to use otg on my one v.
Sent from mah Htc one V.
I tried connecting a USB keyboard using an USB OTG cable, but I didn't get it to work. The other USB port is in use by my external harddrive.
Is there a possibility to make the keyboard work?
Can immagine more people want to add a second USB device to their OUYA...
Dropshots said:
I tried connecting a USB keyboard using an USB OTG cable, but I didn't get it to work. The other USB port is in use by my external harddrive.
Is there a possibility to make the keyboard work?
Can immagine more people want to add a second USB device to their OUYA...
Click to expand...
Click to collapse
You'll need to buy a USB HUB (Get a powered one to future proof all your USB needs, you can get a USB 2.0 Hub pretty cheap). This will allow you to hook up at least 3 USB's to the OUYA. The Micro USB won't work for things such as hard drives or HID devices.
In the future, please use the search function before posting as this has been talked about in many other posts.
Dropshots said:
I tried connecting a USB keyboard using an USB OTG cable, but I didn't get it to work. The other USB port is in use by my external harddrive.
Is there a possibility to make the keyboard work?
Can immagine more people want to add a second USB device to their OUYA...
Click to expand...
Click to collapse
I have a 4-port hub and it works fine connecting 1 storage and 3 other usb devices
I had this issue where only one harddrive could be used and If you have a harddrive with 2 partitions ouya wont mount it. Luckily I found an app called usbotghelper which does all the above I mentioned plus read and write and ext3 support. I wish it would get submitted to the ouya store so I could use the paid version that will mount on startup.
I have a Chinese phone and a Chinese OTG cable. On insertion of OTG cable the phone volume status bar appears, reducing volume to minimun and leaving to rest for a period removes the status bar. OTG Troubleshooter reports positive USB host support but negative on all three subsequent tests. I am now concerned that the cable is faulty. I am unaware of the technical limitations and because of this I need advice whether an OTG cable should provide the same connectivity with a PC as a standard USB cable. This one connects with my PC with no problem!!
Any help greatly appreciated.
justfreedo said:
I have a Chinese phone and a Chinese OTG cable. On insertion of OTG cable the phone volume status bar appears, reducing volume to minimun and leaving to rest for a period removes the status bar. OTG Troubleshooter reports positive USB host support but negative on all three subsequent tests. I am now concerned that the cable is faulty. I am unaware of the technical limitations and because of this I need advice whether an OTG cable should provide the same connectivity with a PC as a standard USB cable. This one connects with my PC with no problem!!
Any help greatly appreciated.
Click to expand...
Click to collapse
Are you sure your phone support OTG usb? Not all of them do. Regarding using OTG cable with PC, I'm not sure it will work. OTG cable has a few pins shorted together to initiate "host" mode on your phone so you can connect peripheral devices (like mouse, keyboard, usb stick, drive, etc.). By default, PC is already setup as "host" to act in that mode.
some Chinese phone does not support OTG, what brand of phone do you use?
vectron said:
Are you sure your phone support OTG usb? Not all of them do. Regarding using OTG cable with PC, I'm not sure it will work. OTG cable has a few pins shorted together to initiate "host" mode on your phone so you can connect peripheral devices (like mouse, keyboard, usb stick, drive, etc.). By default, PC is already setup as "host" to act in that mode.
Click to expand...
Click to collapse
My original post stated that the OSG Host had been confirmed as present and my query was whether an OSG cable would permit connection with a PC because mine will connect. This makes me think that the cable is incorrectly configured (or in other words NOT an OSG cable). Your reply stated that you were not sure, or in other words my query was not answered. I guess I'll just return it as faulty.
what is the difference between usb host and usb otg?
karthikgoud said:
what is the difference between usb host and usb otg?
Click to expand...
Click to collapse
"Usb host mode" and "usb otg" are probably referring to the same thing, if this is what you are asking...
USB OTG
stamatis is correct.
I have an XPERIA M (C1905) with root access and a LOCKED bootloader.
My testing has shown the XPERIA M supports USB OTG and USB power charging, but not both at the same time[citation needed].
I have tested the following:
• External MicroUSB USB flash and SD card readers are supported directly attached to phone.
• My testing has shown MHL external connections don't work in the XPERIA M with Android 4.1.2 at this time.
MicroUSB port doesn't support power and data at the same time, which is a bad indicator.
• Sony DK10 Media Dock ONLY provides power. It can not provide USB data and power at the same time. Really means it doesn't work.
• Aten 4 port USB switch is supported †
• Targus 7 port USB powered hub is supported
• WD 320GB HDD is supported via a power USB hub
• Logitech USB Unifying mouse supported (sans back key and context menu on mouse) M950,M325 and M905 tested
• Logitech USB Unifying keyboard supported (Esc - Back and Alt-Menu - context menu) K800 and K400 keyboards tested
• The supplied microUSB power on the XPERIA M is greater than an XPERIA S, as I can mounted USB flashdrives on the XPERIA M which give a power consumption error on the XPERIA S. Still can't mount a USB powered WD USB HDD directly to the phone. You need a powered hub for that.
† - With the XPERIA M connected to an Aten 4 port USB switch it becomes one of four devices that can selectively use all supported USB devices connected in a desktop environment.
For me this feeds a Targus 7 port powered USB hub and a U2410 24" monitor with additional USB ports.
The SD/MMC card reader in the U2410 monitor is available too via the Aten USB switch too.
XPERIA M does seem to support higher powered USB 2.0 devices, but still draws the line before being able to directly support the likes of WDC USB 2.0 Hard Disk Drives.
Hello guys, I was wondering if you could help me out
I already have the phone (durr ) and the USB OTG Cable but my doubt is the following:
Can I have the USB OTG connected to the phone and to a Hub at the same time?
[btw:Being one of the ports of the USB Hub a charger and the other ones random stuff (such as mouse, keyboard and so on)]
matheusimmer said:
Hello guys, I was wondering if you could help me out
I already have the phone (durr ) and the USB OTG Cable but my doubt is the following:
Can I have the USB OTG connected to the phone and to a Hub at the same time?
[btw:Being one of the ports of the USB Hub a charger and the other ones random stuff (such as mouse, keyboard and so on)]
Click to expand...
Click to collapse
Pretty sure when in otg mode it will always be a power source and unable to charge but I could be wrong.