Database Develop

USB Hub & OTG

I am trying to find a USB hub that will work well with my Nexus 7, via an OTG cable, for a semi fixed car installation. I picked up one of these USB hubs a week or two ago, but I am not sure its going to be reliable enough.
I tested out with my iPod, plugged directly into the OTG cable, the Nexus picks it up and allows me to use it as external storage. I then plugged the hub into the OTG cable (Nexus also plugged into charger), plugged the iPod into the hub, and the Nexus tries to connect to the iPod. But, for some reason fails to do so. In the process I can see it mount/unmount to the point that the iPod freezes. When I have all of this set up in my car I want to be able to reliably run the following:
USB Flash Drive 128GB/256GB (in place of the iPod)
USB-DAC
Joycon board (steering wheel controls)
Easycap (reverse camera)
Are there any recommended USB hubs that will work? Since tihs will be installed behind the dash, I want to put something in there, and then essentially forget about it.
Thanks.

Try this, unplug the usb hub, plug all your devices into the hub then connect it back to the otg. You might need a powered hub but try the method I just listed first. Also, are you rooted and have stick mount installed?

r00t4rd3d said:
Try this, unplug the usb hub, plug all your devices into the hub then connect it back to the otg.
Click to expand...
Click to collapse
I think I already tried this, but will give it another go. I also tried plugging the USB hub into my laptop, still a no-go on the iPod. Everything else I plugged in worked though, but none of it was pulling much power (headset, mouse, cell phone). I could not find a flash drive anywhere at home, so am waiting to pick one up before I try again with a flash drive.
r00t4rd3d said:
Also, are you rooted and have stick mount installed?
Click to expand...
Click to collapse
Yes rooted, but do not have stick mount installed as using Timur's ROM, so no need for stick mount.

Nexus 7 OTG Questions

I have a OTG cable for my nexus 7. I need to connect it up to my computer and a mouse at the same time with a USB hub, How can i connect it to my computer. I have tried a usb-usb cable with no luck

I wonder if a wifi usb dongle would work. I hate that I had to call it a dongle, but I can't think of another word for it right now.

The tablet can either be a host (for the mouse device) or a device (for the PC host), not both at the same time. If you want to use adb while using a mouse, look into wireless adb.

Try Timur's USB Rom
http://rootzwiki.com/topic/37755-timurs-kernel-usb-rom-usb-host-power-management-usb-audio/

elmicha said:
The tablet can either be a host (for the mouse device) or a device (for the PC host), not both at the same time. If you want to use adb while using a mouse, look into wireless adb.
Click to expand...
Click to collapse
I was wondering, can you use a usb otg with a usb hub so that you can use a keyboard and charge the N7 at the same time?

It probably won't work with a USB hub, because the side of the hub that plugs into the tablet wants to receive power, not give it.
But you can use a Y cable and one of the kernels that provide OTG charging, like Timur's kernel, faux123 kernel, and probably others. Search Google for 'Nexus 7 OTG charging'.

Reply to wrong topic

Help with Smart Dock

i was using the Smart Dock, for about 6 months, and it was running perfect, i saw movies, and play games (emus, and android games) using a ps3 controller wired, on the Dock´s USB, and every time work perfectly.
But suddenly, it stop working, now its dificult to connect, i connect it, and in the phone screen appears the "HDMI cable connected", but after a few seconds appears "HDMI cable disconnected", and then, the message appears one after one,
and when it work, the screen mirroring runs well, but when i connect a mouse (wired) dont work, neither the ps3 controller or a pendrive, the USB Host of the Dock is not working,
I try using a USB OTG, and connect both mouse and ps3 controller, and both work well, but not in the Dock
anny suggestions?
Sorry for the long post

You probably are, but just in case, I'll ask anyway..... Are you using a powerful enough charger (1.8-2.0 maH output) .... e.g-the one that came with the note 2? And are the cables snugly snapped into place and not loosely connected?
Sent from my SPH-L900 using xda premium

omar_alex01 said:
i was using the Smart Dock, for about 6 months, and it was running perfect, i saw movies, and play games (emus, and android games) using a ps3 controller wired, on the Dock´s USB, and every time work perfectly.
But suddenly, it stop working, now its dificult to connect, i connect it, and in the phone screen appears the "HDMI cable connected", but after a few seconds appears "HDMI cable disconnected", and then, the message appears one after one,
and when it work, the screen mirroring runs well, but when i connect a mouse (wired) dont work, neither the ps3 controller or a pendrive, the USB Host of the Dock is not working,
I try using a USB OTG, and connect both mouse and ps3 controller, and both work well, but not in the Dock
anny suggestions?
Sorry for the long post
Click to expand...
Click to collapse
I have this problem too!! none of the USB ports are functioning, however USB accessories all work with my Note 2 via OTG cable (I tried connecting the OTG cable to the Smart Dock too and this didn't work either)

djbenetti said:
I have this problem too!! none of the USB ports are functioning, however USB accessories all work with my Note 2 via OTG cable (I tried connecting the OTG cable to the Smart Dock too and this didn't work either)
Click to expand...
Click to collapse
I have exactly the same problem with all 3 USB ports. HDMI works fine. Is there any special setting or my dock is faulty?

I think they must be faulty, either the unit itself or possibly the charger, or the charger for some reason is not strong enough to power the USB ports (although that seems strange as everything is official Samsung product, and I've tried using my phone power adapter too which ostensibly is the same)

Yes the charger in the dock is 100% the same with the one in the phone packaging. I tried to power the dock through my laptop without any success. Unfortunately, there is not powered problem.

[Q] USB Audio (car usb connector)

I've been searching for a while to solve this.
I'd like to connect my HTC one to my car usb connector.
I've seen several repoirts claiming usb audio works, connecting dac's etcetra.
I know I can connect usb drives with a micro-usb to usb connector, tried it and this works.
But I have also seen people saying you need an USB OTG cable for this, so what is it?
I've already connected my One via the micros-usb to usb cable to my car but I do net get audio via the usb on my car equipment.
So again the question, is audio out available on the htc one (and on other android phones) with the stock rom.
Some of the report where talking about CM roms, I do use the elegancia one but I have no intent of switching to CM.

deboopi2 said:
I've been searching for a while to solve this.
I'd like to connect my HTC one to my car usb connector.
I've seen several repoirts claiming usb audio works, connecting dac's etcetra.
I know I can connect usb drives with a micro-usb to usb connector, tried it and this works.
But I have also seen people saying you need an USB OTG cable for this, so what is it?
I've already connected my One via the micros-usb to usb cable to my car but I do net get audio via the usb on my car equipment.
So again the question, is audio out available on the htc one (and on other android phones) with the stock rom.
Some of the report where talking about CM roms, I do use the elegancia one but I have no intent of switching to CM.
Click to expand...
Click to collapse
since the HTC One does not automaticly plug as mass storage i guess that the car radio simply does not recognize the phone as a mass storage with music.. an USB OTG cable would "fix" it since it will force the phone to be shown as mass storage.. (its a guessing anyway)

And you have guessed correctly. The USB otg cable works fine.....except it added ringtones et al when you select root folder. Worked ok if I navigated to the music folder (assuming your vehicle has that option).
Sent from my HTC One using Tapatalk 4

jmitr said:
And you have guessed correctly. The USB otg cable works fine.....except it added ringtones et al when you select root folder. Worked ok if I navigated to the music folder (assuming your vehicle has that option).
Sent from my HTC One using Tapatalk 4
Click to expand...
Click to collapse
Well, for me it does not work.
As I said before I can attach a USB drive to my phone and I can accomplish this by using a micro-usb to usb adapter.
When attaching the drive my phone complains it cannot charge and that I need the standard charger.
But when using a file explorer I can see (read and write) the contents of my usb drive in the storage/usb folder.
I thought this was enough to decide that the converter was OTG but now I'm not so certain about this anymore.
Is every usb to micro usb an OTG or what are the extra requirements?
Anyway I tried again to connect to my car audio and the message I got on the car was
that he could not charge the phone but the phone was as well not recognized as media input.
Because OTG adapters are very cheap I ordered one which explicitly says it is OTG,
I'll see what happens when I can try that one out but in the meantime all comments are welcome.

deboopi2 said:
Well, for me it does not work.
As I said before I can attach a USB drive to my phone and I can accomplish this by using a micro-usb to usb adapter.
When attaching the drive my phone complains it cannot charge and that I need the standard charger.
But when using a file explorer I can see (read and write) the contents of my usb drive in the storage/usb folder.
I thought this was enough to decide that the converter was OTG but now I'm not so certain about this anymore.
Is every usb to micro usb an OTG or what are the extra requirements?
Anyway I tried again to connect to my car audio and the message I got on the car was
that he could not charge the phone but the phone was as well not recognized as media input.
Because OTG adapters are very cheap I ordered one which explicitly says it is OTG,
I'll see what happens when I can try that one out but in the meantime all comments are welcome.
Click to expand...
Click to collapse
Yes, the cable I had explicitly said "OTG".
I only experimented with this for fun, my Elantra also supports built in bluetooth (phone controls are on the steering wheel, mic in the roof) so I mainly put my One in my car kit, launch car mode and away I go.
The OTG cable worked well for me when I tried it though. It did NOT work with my Son's Nexus 4 so these things can be finicky.

[Q] Playing my 3.0 hdd on my google nexus 7

Hi Guys
In need of some helps on the above issue,I have the nexus 7 jellybeam 4.4.4 and recently download nexus media importer app as i am trying to play films and view pictures from my samsung 3.0 hard drive.i have the standard otg cable and was wondering if this maybe an issue?when i plug the device in it powers and the drive works but can not view anything.if i put my usb stick i can view my files
my nexus is not rooted
thanks

You won't be able to play movies from devices like HDD.
USB port on Nexus 7 doesn't provide enough juice to spin-up platters in mechanical hard drive.
I tried that once also, the hdd was just clicking.
Either move the files to flash drive, or connect hdd through active (POWERED) usb hub - but i am not 100% sure with this on non rooted nexus. It's anyway a bit impractical.