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Need to change USB bus mode from "device" to "host"

Discussion in 'Android Lounge' started by PacificaBren, Jan 5, 2013.

  1. PacificaBren

    PacificaBren Member
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    I bought this USB keyboard/case for my mom's Zenithink C71 Upgrade.

    It has a full-sized USB plug, so I need to get a USB-to-mini USB adapter for it tomorrow. The thing is, I'm also anticipating possibly having to change the USB bus mode to get it to work, as that is mentioned in several of the Amazon reviews of this product.

    Here's what one reviewer wrote:

    Now here's my problem:

    When I call up the menu on that tablet and get into the system settings, I can't find Advanced Settings or anything else that would let me alter the USB host mode.

    This is a Chinese tablet we're talking about that came from the factory with a presumably ordinary install of ICS.

    Is there something I'm missing here? Is USB host mode located somewhere else when you're in ICS?

    Thank you in advance for whatever light you can shed on my dilemma!
     

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  2. Harry2

    Harry2 Extreme Android User
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    Your tab has to be able to switch in the USB host mode.
    So have a look at its manual for this or USB OTG or USB On The Go.

    If the tab has USB OTG ability then the jumped pins 4&5 of the micro/miniUSB connector would force the tab in USB host mode.
    Such jumped pins have USB OTG cables (micro/miniUSB to full-sized USB A female).

    Maybe your tab has enclosed such a USB OTG cable, if not, look at Amazon ... mine came for 7 Euro :)

    Harry
     
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  3. PacificaBren

    PacificaBren Member
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    Thank you Harry. I don't quite understand the concept of USB OTG, but I'll check the manual. The manual's English isn't so good. Maybe I'll get lucky and the keyboard will just work when I plug it in? I sure hope so...
     
  4. PacificaBren

    PacificaBren Member
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    But isn't it still kind of weird that I can't access an Advanced Settings when I press the Menu button?
     
  5. Harry2

    Harry2 Extreme Android User
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    First you might try the USB OTG ability of your tablet with an USB storage stick.

    The reason is that your USB keybord might not be supported of the Android firmware of your tab.
    But USB storage sticks are supported in most cases.

    Harry
     
  6. Harry2

    Harry2 Extreme Android User
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    My HTC One X phone has USB OTG ability and has not a switch in its Settings ... the USB OTG cable does this.

    I correct it, the phone has a switch in its settings, but only for to dismount the USB device (like you have to do it on the PC).

    Harry
     
  7. PacificaBren

    PacificaBren Member
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    If you're suggesting plugging a USB thumb drive into this thing to test it, that won't be possible until I pick up a USB-to-mini USB adapter tomorrow.

    This thing came with a USB cable that plugs into an AC adapter, but I doubt that's the USB OTG cable you're referring to.
     
  8. Harry2

    Harry2 Extreme Android User
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    I had a look at Zinithink's webpage, the C71 Upgade has OTG ability :)

    So your host cable should have a full-sized USB A female connector ... on this you could plug a USB thumb drive for a test.

    Harry
     
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  9. PacificaBren

    PacificaBren Member
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    Thank you for looking into that for me! The cable the tablet came with is mini USB on one end, and then the other end that plugs into the AC adapter is your basic male USB plug, so that thing won't accept a thumb drive.

    Which site did you look at? I know there's apparently a fake Zenithink site out there being run by scammers, and even when you're looking at the real Zenithink site, the info is kinda sparse.
     
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  10. Harry2

    Harry2 Extreme Android User
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  11. PacificaBren

    PacificaBren Member
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    That's the legit, real Zenithink site. If you find a site claiming to be Zenithink, but accepting orders from US customers, that one is fake.

    I bought my mom's Zenithink on eBay.
     
  12. Harry2

    Harry2 Extreme Android User
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    So the C71 Upgrade spec's says 'USB host' and 'USB OTG', two miniUSB sockets I'd guess.

    I think, 'USB host' with that cable, which you had mentioned, connected to the PC, let the tab acts like an USB client, means on PC you'll see your tab's storage and SD card.

    So you'd need for the 'USB OTG' (for the tab been acting like a host) this USB OTG cable which I had mentioned.

    Good luck :)

    Harry
     
  13. PacificaBren

    PacificaBren Member
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    Thanks again. So...

    If I'm understanding you, are you thinking maybe I would need an OTG cable in order for that USB keyboard/case to work?

    I sure hope not, since the dang thing didn't come with such a cable.

    Anyway, yes, the Zenithink C71 has two mini USB ports.
     
  14. Harry2

    Harry2 Extreme Android User
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    Yes, I think you'll need to buy an USB OTG cable for to force the tab in USB host mode.

    But it's not a sure thing that the keyboard will work.

    Maybe you might think about a Bluetooth keyboard. As I heard, such keyboard are more easy to handle with tabs.

    Harry
     
  15. PacificaBren

    PacificaBren Member
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    No Bluetooth on this particular tablet.

    :(
     
  16. Harry2

    Harry2 Extreme Android User
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  17. PacificaBren

    PacificaBren Member
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    Success! I stopped by Central Computers in San Francisco and they had a USB OTG cable that went from USB female to Micro USB. Since the tablet in question has Mini USB, as opposed to Micro USB, they also sold me a Micro-to-Mini adapter.

    The employee warned me that sometimes adapters mess with things and stop them from working, but I took the setup home, and it works perfectly.

    I'm glad I went to a real computer store, as opposed to Radio Shack, because Radio Shack may or may not have had the necessary adapter, and may or may not have had an employee on hand who knew what I needed.

    I'm also glad I had you to advise me, Harry. It's thanks to your input that I was able to know what to ask for when I went into that store!
     
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  18. Harry2

    Harry2 Extreme Android User
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    You're welcome, Bren and I'm glad you had success with the USB keyboard :)
    Thanks for the feedback.

    Harry
     

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