[Q] Concurrent Pogo plug charging/OTG USB usage under Android 4.3? - Nexus 10 Q&A, Help & Troubleshooting

A Nexus 10 with Android 4.2.2 cannot be concurrently charged with a pogo plug while using a USB OTG connected accessory. Has this deficiency been fixed with the Android 4.3 update?

I wonder if this isn't so much a deficiency as a way to protect people from frying the tablet by charging through pogo and usb at the same time. So by default they disable usb while pogo's charging.
Sent from my Nexus 10 using XDA Premium HD app

lynnux said:
I wonder if this isn't so much a deficiency as a way to protect people from frying the tablet by charging through pogo and usb at the same time. So by default they disable usb while pogo's charging.
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Well for the Nexus 7 (original model) there is a custom kernel that enables what I am asking about. Also from what I read it seemed like a deficiancy as the code is there to stop concurrent charging from both the pogo connector and USB but unfortunitely it is cutting off pogo charging even when a OTG USB device is drawing power and not charging what so ever. The notification charge indicator displays as if the device is charging but that is false. An OTG cable has more pins (5?) than a USB charging cable (3?) so it seems a solution should be possible.
I'm no expert and am only going by what I've read but it makes sense to me that when the microUSB port it not charging that the pogo connector should be able to. Personally I think the pogo connector has been abandoned and will not likely be included in the Nexus 10 refresh unless Android 5 (Keylime Pie) addresses this issue. Assuming, of course, it has not been addressed with Android 4.3.

Related

USB Charging Cable

I've unlocked and rooted my Nexus mainly to use extra storage.
Can I use a standard USB cable plugged into the OTG cable for charging with the wall charger?
Also with the extra power the charger gives out will it be safe to use for charging my Kindle?
Thanks
jonchill said:
I've unlocked and rooted my Nexus mainly to use extra storage.
Can I use a standard USB cable plugged into the OTG cable for charging with the wall charger?
Also with the extra power the charger gives out will it be safe to use for charging my Kindle?
Thanks
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You should be okay using the 2.0 USB with the OTG charger... There quite consistent. And It would also be the same on your kindle. If anything it may charge quicker. But if your not entirely sure ? Google it.
I've interchangeably used the Kindle Fire charger and OEM n7 charger without any issues. I like the KF charger better because it comes with a much longer cable.
Sent from my Nexus 7
Only problem I have seen is the ones with asymmetrical housings from Samsung don't fit well in N7, but you probably could make it work.

Charge while OTG

Hi.Is there any kernel for Nexus 10 to charge while OTG ? I really need it,my nexus 10 will be connected to a printer most of the time so i need to be able to charge it thru the pogo or thru a USB hub.
Thanks in advance and have a good day !
There's nothing in the kernel that should stop the device from charging via Pogo if you're connected via OTG to something else, so long as the incoming source outweighs power output (which it should in basically every instance).
Rirere said:
There's nothing in the kernel that should stop the device from charging via Pogo if you're connected via OTG to something else, so long as the incoming source outweighs power output (which it should in basically every instance).
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I see.I'll wait till my Pogo arrives but from what i've read,there are problems when using OTG and trying to charge the device as well.
Also,is there a way to connect my nexus 10 to the pc(for app developing) and also connect it to the printer(Star micronics tsp100/143USB-to test if my app is printing right).It really sucks that i need to connect it to the pc,run my app from eclipse and then plug it to the printer.
.This would mean i need to use the tablet as a host and as a slave/client at the same time,is that possible ?
Rirere said:
There's nothing in the kernel that should stop the device from charging via Pogo if you're connected via OTG to something else, so long as the incoming source outweighs power output (which it should in basically every instance).
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You cannot charge with the pogo plug while any OTG device is connected period. This limitation has only been resolved with the Nexus 7. The limitation extends to all Roms stock or otherwise.
This topic has been covered in the accessories forum and I can personally confirm it. What fools a lot of people is that the notifications menu shows charging but the indicator is bogus.
Maybe with Android 4.3 but I am not holding out hope for that fix. It seems Google has abandoned any plans they once had for the pogo connector despite its potential (dock, audio, charging, fasters device I/O ... etc). Charging through the pogo plug has only been enabled through a 3rd party.
I love my N10 but Google dropped the ball on the pogo connector.
3DSammy said:
You cannot charge with the pogo plug while any OTG device is connected period. This limitation has only been resolved with the Nexus 7. The limitation extends to all Roms stock or otherwise.
This topic has been covered in the accessories forum and I can personally confirm it. What fools a lot of people is that the notifications menu shows charging but the indicator is bogus.
Maybe with Android 4.3 but I am not holding out hope for that fix. It seems Google has abandoned any plans they once had for the pogo connector despite its potential (dock, audio, charging, fasters device I/O ... etc). Charging through the pogo plug has only been enabled through a 3rd party.
I love my N10 but Google dropped the ball on the pogo connector.
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Damn,really bad news for me.. What do you mean by "Charging through the pogo plug has only been enabled through a 3rd party."
Are you talking about the nexus 7 or about some hardware modifications ?
And what you're saying is that there are no mods,roms or kernels for nexus 10 that can modifiy this,like the nexus 7 timurs kernel(if i got it right) ?
gehaste said:
... Are you talking about the nexus 7 or about some hardware modifications ? And what you're saying is that there are no mods,roms or kernels for nexus 10 that can modifiy this,like the nexus 7 timurs kernel(if i got it right) ?
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Just to be clear the Nexus 7 (only) has the "Timur Kernel" as an option. While the Nexus 10 "no mods,roms or kernels" or even any hardware mods as far as I am aware.
To me this lack of functionality is a flaw in Google's kernel/ROM implementation considering they added the pogo plug connector allowing charging but never anticipated/implemented concurrent use of the USB and pogo connector.
From what I have read the pogo plug was originally supposed to be included with the Nexus 10 but that was changed just before the product was released. I never heard exactly why but I now suspect that it has to do with the stock kernel/ROM limitation.

[Q] Nexus 7 short circut damage help, please.

So, I apparently did something very stupid with my new Nexus 7.
I have a few 1 TB external hard drives, which don't get enough power via an OTG adapter from the Nexus 7 to run. So, I purchased a two into one cable -- that is, a cable that combines two male USB A plugs into one Micro USB B plug so that a USB 3.0 hard drive can use two USB 2.0 ports to have enough power. I had planned to use this to enable use of the hard drives with the Nexus 7 while traveling by plugging one cable in the tablet and the other into a charger.
When I got the cable I tested it by plugging one of the USB A plugs into my Nexus 7, and then I plugged the other into my computer's USB port. The Nexus 7 promptly shut down, the computer complained of a power surge on the USB port, and a distinct smell of melted plastic came from the computer's USB port. I guess the combining cable didn't combine so much as it just acted like a double headed male A USB cable and shorted things out?
The Nexus 7 refused to restart afterwards until I it plugged it into its charger. It works now, mostly. However, if its battery charge is above about eighty-seven percent then it always reports that it is charging, regardless if it is plugged in or not. And if I plug it into a computer while it is reporting that it is charging I have to restart the tablet to get it to connect to the computer -- I guess it thinks it is connected to a charger and doesn't bother checking for a data connection unless restarted.
The level where it stops thinking it's charging varies somewhat -- I've had it still claim to be charging all the way down to eighty-two percent charge, and by repeatedly opening the battery app over and over again I have been able to get it to notice that it's really not charging all the way up to ninety-one percent, but no higher, and I have to open and close the battery app an increasing number of times for every percent that it goes up over eighty-seven before it will notice it's not charging.
Any idea what kind of damage I'm looking at? How to fix it? Whether I can get the warranty people to fix it free of charge? If yes, whether they will send me a new one or just fix the one I have? Whether it's worth getting fixed since it mostly still works, and doesn't really bother me as long as it doesn't get worse?
Nothing?
Nothing from anyone?
Try replacing the internal USB plug? About $25. Easy to do your self.

Nexus 7 (2012) dock charging performance

Hello everyone, After few failing attempts to make my own OTG Y cable for car mounting & couldn't find it anywhere down here (Egypt), I thought about changing the concept.... I'm thinking about using the pogo pins to charge the tablet & here is where my questions come:
- Are the pogo pins reliable & capable of charging the tablet as an alternative of usb charging?
- Does it take more time to charge rather than the usb cable?
Thanks in advance
USB is better
Adham L. Alfy said:
Hello everyone, After few failing attempts to make my own OTG Y cable for car mounting & couldn't find it anywhere down here (Egypt), I thought about changing the concept.... I'm thinking about using the pogo pins to charge the tablet & here is where my questions come:
- Are the pogo pins reliable & capable of charging the tablet as an alternative of usb charging?
- Does it take more time to charge rather than the usb cable?
Thanks in advance
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as far as I know. USB is faster.
nijom said:
as far as I know. USB is faster.
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USB is faster. I build in a dock drop for my car and while its cool, the charge connection pins are highly variable due to the fit and finish of the crafting I was able to achieve on the dock itself.
The warp and shrink with hot and cold is pretty much outside tolerance +90F and +40F. While I can get it to fit, at higher temps the connection is lose. This results in static and hiss as the connection wobbles back and forth. Im in Texas and not as hot as egypt is my guess.

Nexus 7 wiring??

Hello all,
First thread here and hoping you guys and girls with more experience can help.
Basically I am fitting my nexus 7 2012 in my car but its got the common charging problem where my battery drains faster than I can charge it.
I have ordered a new USB port strip as I've read that can fix it and fingers crossed with that.
My problem/requirement:
1. I want to charge the tablet via the usb port using a hardwired 5V 2A device this will be plugged into a otg y splitter which is then plugged into the tablet.
2. The USB A side of the splitter I want to connect to my cars ECU (it has a USB port) so I can read the data on that (basically a very expensive memory stick)
I wanted to confirm that this would work and id be able to read data at the same time as charging it.
I also wanted to double check I'm not somehow going to send my 5v 2a power down into my ECU and set it on fire
On a side note, if my new USB port replacement doesn't solve the issue of charging the tablet i will have to remove the battery and hardwire it in, will i still be ok with using the USB port for the ecu while charging hardwired with no battery?
Kind Regards
Tim
Getting any USB 2.0 device to take current while hosting is tricky.
Usually it involves talking directly to the PMIC (power management IC).
If it's a fixed installation, why not remove the battery?
It will avoid the grief of the battery swelling up, which is not too unusual for things plugged in all the time.
I've been using a Nexus 7 (2013) for a few years, but just charging on USB.
It started falling out of its nice holder.
That's when I realized that the battery was all puffed up making the back convex.
I cut off the battery cell itself on the metal tabs and soldered in wires to a 4 V 2 A supply.
I found out that the BMS is a bit balky, it refused to turn on.
So I connected it to USB to "charge" it for about 10 seconds.
Then I could turn it on (without the USB).
Ok, I could have bypassed the BMS entirely but that can be a whole 'nother can of worms too.

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