IOIO to charge Samsung Tab 2 10.1

[Falcon]

Hello Guys,

I want to inquire few things.

• What is the max current for the IOIO-OTG  in a 5V.

• We tried using a CPU Power Supply and attach color Purple wire to IOIO-OTG VIN with rating of 5V, 3A. The samsung tab didn't charge.
  

Kindly note: Samsung only needs 5V, 2A power supply to charge.

• We plan to use 12V, 16A (yellow wire) to VIN. Is it ok? And can this charge the samsung tab?
  

Thanks

[Ytai Ben-Tsvi]

Inline

On Wed, Dec 4, 2013 at 7:36 AM, Falcon <starcra...@gmail.com> wrote:

Hello Guys,

I want to inquire few things.

• What is the max current for the IOIO-OTG  in a 5V.

3A

• We tried using a CPU Power Supply and attach color Purple wire to IOIO-OTG VIN with rating of 5V, 3A. The samsung tab didn't charge.
  

Kindly note: Samsung only needs 5V, 2A power supply to charge.

The tablet doesn't know the current rating of its charger. It probably uses some other way to detect that a charger is connected to it as opposed to a host. In many cases, those chargers indicate themselves by shorting the data lines on the USB connection, something that by definition will not allow a data connection at the same time. What happens when you plug the tablet into your PC? Also, do you get a data connection established with the IOIO despite no charging?

 

• We plan to use 12V, 16A (yellow wire) to VIN. Is it ok? And can this charge the samsung tab?
  

You can. Note, however, that a recent problem that was found on the board may cause the IOIO's 5V voltage regulator to fry if driven by >10V over a long wire with a power supply that doesn't have a soft-start. It is thus recommended to use up to 10V input, unless you know what you're doing (in which case up to 15V is fine).

 

Thanks

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[n]

Ytai

I think there are other ways than shorting the usb line too that will allow the phone to note it charging from wallwart charger like the charging chip on the phone like many max or ti gas gauges may look for the current input and then for a char or somesort of notation(from the driver perhaps) if its connected to the usb port or not if it connects to the wallwart charger.
Last time I shorted my lpc11u24s usb lines I saw magic smoke all over.

[Ytai Ben-Tsvi]

If you know what is the actual way to do that, let me know.

If it is not device-specific, I will also consider supporting it in the official software.

[Nishant Sood]

Ytai,

Okay I will make it sure I share the info. On the lines of this particular case.

Thanks & Regards,
Nishant
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[Falcon]

Ytai,


Thanks for the reply.

Does anyone tried http://www.youtube.com/watch?v=qTGQcFuozb4  rather than using the "sensor" featured on the video. Can we use IOIO-OTG? 


In summary there is IOIO-OTG, USB-OTG, Charging Y cable and a Charger. Can this solve the charging problem?


Thanks very much.

[Ytai Ben-Tsvi]

Yes, if your phone likes it, it should work. You'll have to use the IOIO in device mode, which is a recent feature that hasn't yet been officially released. The library is on master in GitHub, though, and is very straightforward to use.

[Falcon]

Hello Guys specially Ytai,

The bad news..

http://shop.valarm.net/collections/cables-connectors/products/micro-usb-host-otg-y-cable-with-micro-usb-power-for-samsung

* DOES NOT WORK WITH Tab2 and Tab3!!! We have never claimed this cable will work on these devices, and customers have reported that it DOES NOT * :(
-------------------------------------------------------------------------------------

Now the only option would be via bluetooth. We would like to ask.. What is the minimum current needed as power input for IOIO to carry USB Bluetooth dongle?

It seems the USB Bluetooth dongle is not viewable / searchable. We already tried the advice from IOIO github page. We already downloaded and tried: http://zornsoftware.codenature.info/blog/pairing-spp-bluetooth-devices-with-android-phones.html

Any advice?


Thank you very much..

[Nishant Sood]

I think you people can have 2amps of power supply anyways it wont hurt and the much I remember you need this much definitely with bluetooth.

Thanks & Regards,
Nishant
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[Nishant Sood]

Also I have a bluetooth module from Orchid Innovations its been 5 to 7 years that I bought this module however it works like a charm.

Thanks & Regards,
Nishant
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Sent from My Android (humongous NOTE-II)

On 17 Dec 2013 21:53, "Falcon" <starcra...@gmail.com> wrote:

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[Falcon]

Thank you for the reply N.


I believe it was mentioned the max current output of IOIO to USB is 1.5A (USB Standard). If IOIO can supply 2A then it can already charge power to Samsung Tab 2. But it doesn't 



Best Regards,


Falcon

[Nishant Sood]

Falcon,

Well I meant the power input from the adapter or other sources like battery to the ioio not the output from ioio

Thanks & Regards,
Nishant
-------------------
Sent from My Android (humongous NOTE-II)

[Ytai Ben-Tsvi]

Let me clarify:

The IOIO can supply up to 1.5A on its 5V rail.

The IOIO-OTG can supply up to 3A on its 5V rail.

On the IOIO-OTG there's a 0.75A fuse on the USB supply rail.

Regardless of that - a USB device should never draw more than 0.5A. So even if you had a power supply capable of 1000A and no fuse, the phone should still draw up to 0.5A and would not charge any faster, unless there are any USB tricks I'm not familiar with. To the best of my knowledge, the fast chargers work by shorting the USB data lines to each other, then the phone can detect that and draw more current. However, by definition, you lose the data connectivity when you do that, so irrelevant to the IOIO case.