It sounds like a power supply problem.
Make sure you're using an adequate power supply.
Make sure the trim pot on the IOIO is fully clockwise.
On Mar 24, 2014 12:16 PM, "Eric Lee" <[email protected]> wrote:

>  1.  Upgraded the firmware to v5
> 2.  Installed the precompiled HelloIOIO.apk from V5.03, and it works to
> control the yellow LED.
> 3.  But if I leave the IOIO connected the phone shows me the "Open Hello
> IOIO when this USB accessory is connected?" dialog again after a while (10
> seconds to a couple of minutes), even though HelloIOIO is still running.
> 4.  Regardless of how I respond to this dialog, HelloIOIO no longer
> controls the yellow LED from this point.  If I shut down down HelloIOIO and
> allow it to restart, it works again.
> 5.  If I compile HelloIOIO using Eclipse and the V5.03 libraries, I get
> the same behavior.
>
> I'm assuming this isn't how it is supposed to work?
>
> On 3/22/2014 4:07 PM, Ytai Ben-Tsvi wrote:
>
>
>    1. Please use 
> IOIODude<https://github.com/ytai/ioio/wiki/IOIO-OTG-Bootloader-and-IOIODude>to
>  check the versions of firmware and possibly upgrade to the latest
>    (v5.00).
>    2. If everything is fine, please install the precompiled HelloIOIO.apk
>    from the v5.03 (or earlier if you chose not to upgrade) software bundle on
>    your Android and test.
>
>
>
> On Sat, Mar 22, 2014 at 3:17 PM, G Ragib <[email protected]> wrote:
>
>> Nothing special. All I did was update the firmware on the IOIO-OTG to
>> IOIO0500 when I received it.
>>
>>  USB debugging is disabled on my Note 2. The IOIO-OTG is powered by a
>> 12V (or 5V) DC wall wart through the JST connector. Connecting the IOIO-OTG
>> to my Note 2 by USB (OpenAccessory mode) or bluetooth just works with no
>> fuzzing.
>>
>>  I did notice that the operation of the IOIO-OTG over bluetooth can be
>> unpredictable if powered by feeding 5V through the V(in) pins. IMO, a
>> barrel jack-to-JST connector such as this 
>> one<https://www.sparkfun.com/products/8734>must be included with every 
>> IOIO-OTG instead of the header strips.
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