I setup a self-powered USB2.0 hub which has a 2.5AMP power adapter. I used a dual male (split) to single female USB cable and plugged the TAB USB cable into that.
This same dual cable & hub works fine to power an external USB hard-drive which won't work with just a single cable for power. I would think with 2+ AMPS it should charge the TAB "normally" (with no "x" on the battery indicator) but it does not, the "x" remains. All other devices have been removed from the hub.
Anyone else been able to get a normal charge off a PC or USB hub with a split cable? It's such a pain to have to put the TAB on the wall charger then switch it back to the PC.
when the screen is off the device charges, despite what the battery display says.
tca120 said:
when the screen is off the device charges, despite what the battery display says.
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Correction, it trickle charges. Very slowly.
LordLugard said:
Correction, it trickle charges. Very slowly.
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I understand that but I was under the obviously incorrect impression that if you used a double male USB to single female USB cable you would get a normal charge since there is more power available. Is the charge rate dependent on the TAB seeing power on a specific pin of the cable telling it that a charger is connected and not a cable to the PC? I'm connected to a self-powered hub with a big 2.5amp power supply and nothing else connected to it.
I'm wondering if anyone knows if it's possible to have simultaneous OTG & charging with the use of a pogo pin charger?
For instance, plug in a usb OTG into the main microUSB charging port, and use a pogo pin charger [either make one or buy when they are available], and have a flash drive, or hard drive plugged in, and charge at the same time with the pogo pin connector?
I used to have a Nexus 7, and via a custom kernel, and a OTG charging cable [basically a regular OTG with additional power wires & connector for charger]. But I think it would be simpler to use the pogo pin approach. The only thing I'm worried of however, the kernel might disable OTG while it charges via pogo, or perhaps disable charging while OTG is enabled. I guess in this case, we would need a modified kernel to achieve simultaneous OTG and charging.
Here is a link to one of the first Nexus 10 pogo charger cables and it makes this claim:
"You still can power Nexus 10 while the USB port is otherwise occupied for data uses. It is fun & convenient to have MagNector to free up the USB port and charge faster."
http://www.ebay.com/itm/MagNector-N...ader_Chargers_Sync_Cables&hash=item20ce4990a6
So if that statement is true than the answer to your question is Yes.
eBay item is no longer available..
However, I know how sellers often make unfounded claims like that. So while it's probably a good sign, I am not convinced it's true. If anyone is fortunate enough to have a pogo charger, could you test it out with a otg cable and let us know the results?
Or if you're a kernel hacker, maybe take a look at the kernel source code and tell me what you think?
Also if anyone has a link where I could read about pogo pins for the N10, I'd like to read it. I'm interested in trying to make one, if they don't make any low-cost ones in the near future.
:bump:
mvmacd said:
eBay item is no longer available..
However, I know how sellers often make unfounded claims like that. So while it's probably a good sign, I am not convinced it's true. If anyone is fortunate enough to have a pogo charger, could you test it out with a otg cable and let us know the results?
Or if you're a kernel hacker, maybe take a look at the kernel source code and tell me what you think?
Also if anyone has a link where I could read about pogo pins for the N10, I'd like to read it. I'm interested in trying to make one, if they don't make any low-cost ones in the near future.
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The answer to the question is ye, you can charge and use otg. Btw, http://pogocable.com/ 20$ isn't a bad price...
lKBZl said:
The answer to the question is ye, you can charge and use otg. Btw, http://pogocable.com/ 20$ isn't a bad price...
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Just wondering, have you actually tried it yet? I remember on the n7 it would disable pogo charging when you plugged in otg. I hope n10 is different.
Swiped from my Nexus 10 using xda-developers app
I got the pogo cable in today. I plugged the usb-otg cable into the Nexus 10 with a thumbdrive connected to it. Stickmount recognized the thumbdrive and I can read/write to it. I noticed that the battery runs down while the otg is plugged in though. Running Paranoidandroid 2.99 with whatever kernel comes with that.
bd177 said:
I got the pogo cable in today. I plugged the usb-otg cable into the Nexus 10 with a thumbdrive connected to it. Stickmount recognized the thumbdrive and I can read/write to it. I noticed that the battery runs down while the otg is plugged in though. Running Paranoidandroid 2.99 with whatever kernel comes with that.
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Does it say "Charging (USB)" or "Charging (AC)" in Settings > Battery?
mvmacd said:
Does it say "Charging (USB)" or "Charging (AC)" in Settings > Battery?
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It says "Charging (AC)"
I know it's not the original question, but it looks like that would be possible with a modified OTG USB cable. Sounds like you already have something similar.
I was thinking about this for using my n10 for larger video recording when away from wifi. Just need to hook a battery up to the OTG while its plugged into the thumb drive. It takes a charge off my laptop when connected via the otg usb, so it should work as well with the correct setup voltage/wiring .
I would also like to know the pin designation for the pogo plug. If you can do the same setup as the one above, with the pogo... There would be less chance of damage to the tablet on the go......
metaled222 said:
I know it's not the original question, but it looks like that would be possible with a modified OTG USB cable. Sounds like you already have something similar.
I was thinking about this for using my n10 for larger video recording when away from wifi. Just need to hook a battery up to the OTG while its plugged into the thumb drive. It takes a charge off my laptop when connected via the otg usb, so it should work as well with the correct setup voltage/wiring .
I would also like to know the pin designation for the pogo plug. If you can do the same setup as the one above, with the pogo... There would be less chance of damage to the tablet on the go......
Click to expand...
Click to collapse
I know a nonstandard OTG cable [a OTG charging cable, basically the same as a regular one, except it has female USB only connected to the charging pins] and a modded kernel allowed for simultaneous OTG + charge on the Nexus 7, but I'd rather not have to deal with that, as getting a separate pogo charger seems like a better option.
mvmacd said:
I know a nonstandard OTG cable [a OTG charging cable, basically the same as a regular one, except it has female USB only connected to the charging pins] and a modded kernel allowed for simultaneous OTG + charge on the Nexus 7, but I'd rather not have to deal with that, as getting a separate pogo charger seems like a better option.
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It has to be a moded kernel to access the data in read/write mode? Nothing to do with charging, and correct?
What I was considering is a battery/usb hub combo. One that plugs into the micro usb port and the battery actually has a female usb port for the thumb drive (need root to write to the drive, but not to stream from it). Amazon carries lots of external batteries with micro usb connection and the female usb port.
I agree, the pogo would be much simpler and still allow data through the micro usb.
The pogo would be much better for portability for this type of use especially if it allows for faster charging. If no one has the pin layout, guess I'll wait to get mine and test them myself. 6 pins on the n10 itself so it's not a standard usb pin setup?
metaled222 said:
It has to be a moded kernel to access the data in read/write mode? Nothing to do with charging, and correct?
What I was considering is a battery/usb hub combo. One that plugs into the micro usb port and the battery actually has a female usb port for the thumb drive (need root to write to the drive, but not to stream from it). Amazon carries lots of external batteries with micro usb connection and the female usb port.
I agree, the pogo would be much simpler and still allow data through the micro usb.
The pogo would be much better for portability for this type of use especially if it allows for faster charging. If no one has the pin layout, guess I'll wait to get mine and test them myself. 6 pins on the n10 itself so it's not a standard usb pin setup?
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No, on the Nexus 7, if you plug in a OTG cable [which basically grounds a certain pin, the only difference between micro OTG and micro to full size USB adapter], it disables charging through power pins, because it needs to send power to OTG device, for example, a flash drive. It needs +5V power.
So the kernel mod was to disable the output of power, so that it could instead receive power and charge, from the charger. [The charger also 100% powering the OTG device]
Even if you have an externally powered hard drive, it needs power to turn on, even if it uses a wall adapter for the actual power to run the device.
Here is the kernel I was talking about: http://mehrvarz.github.com/usb-host-mode-power-management-nexus7/
it was made by a rootzwiki user. some discussion here: http://forum.xda-developers.com/showthread.php?t=1934722
Check the images of the USB hub on the 1st link.
Just for the heck of it I plugged a USB cable connected to my PC into the Nexus 10 while the pogo was also connected. The Nexus 10 showed up on the PC as it normally does in the file explorer and I can transfer files back and forth as usual. I went to Settings -> Battery on the Nexus 10 and it showed "Charging AC". I then unplugged the pogo cable and the status changed to "Charging USB". Plugged the pogo back in and the status switched back to "Charging AC". Then to make sure the pogo was actually doing the charging, I watched 2 hours of Netflix with the screen set to full brightness. The battery went down only 2%, so I'm pretty sure the pogo was doing the charging.
Sv: [Q] Pogo pins and OTG question [simultaneous charge & OTG?]
Thanks for your test. However with Nexus 10 connected to pc it is not in otg/host mode. You need to connect for example an usb memory with a otg cable to test if charging work with host mode enabled. There seems to be some discussions going on claiming pogo charging is disabled in host mode on Nexus 10 as well. It would be really really stupid if that's the case and I can't for the world figure out how they could put this limitation in the kernel.
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Johan1976 said:
Thanks for your test. However with Nexus 10 connected to pc it is not in otg/host mode. You need to connect for example an usb memory with a otg cable to test if charging work with host mode enabled. There seems to be some discussions going on claiming pogo charging is disabled in host mode on Nexus 10 as well. It would be really really stupid if that's the case and I can't for the world figure out how they could put this limitation in the kernel.
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Click to collapse
Yes I tried that and the pogo would not charge.
EDIT: I bought a couple of OTG Y-cables on ebay (1 male micro usb end, 1 female micro usb end and a female usb end) to play around with when I saw they had a fix for the Nexus 7. I tried one on my Nexus 7 (PA rom and Timur kernel), connecting the female usb to a powered usb hub that has 16gb sdhc card plugged into it. Then connected the female micro usb end to a spare micro usb charging cable and the other end of the charging cable to the usb hub. The male micro usb end gets connected to the Nexus 7. I fired up the Nexus 7 while in the Asus pogo dock I bought for it and it charges the Nexus 7 while also allowing the OTG connection. I tried the same setup with my Nexus 10 (PA Rom, Ktoonez kernel) and pogo cable and it worked. The Nexus 10 charges through the pogo cable while the OTG works also. With the usb hub I'm using with the Nexus 10, I had to plug the charging cable into a charger wall wart. I don't think the old hub was putting out enough power to power the usb device. I let them both run over a day like this. Ran some RomToolBox app backups on both them and they both are charging on the pogo pins while doing so. If you go to system settings -> battery it shows "Charging AC" on both.
The galaxy nexus already has a custom kernel that supports OTG + charging (via a y-cable):
http://forum.xda-developers.com/showthread.php?t=1835720
In that thread (and the link in the OP there) there are discussions about porting that kernel to the nexus 7. Also, this modified kernel is (currently) for 4.1.2. Unfortunately I am not smart enough to do this myself (especially we are now dealing with the pogo cable and the USB); I do hope to let everyone -- especially the developers! -- knows about the possibility in view of the gnex kernel.
Is this an issue only with Disk Media over OTG, or is it with anything (controllers, etc.) over OTG?
If anyone is interested read my edit a couple of posts up.
Sv: [Q] Pogo pins and OTG question [simultaneous charge & OTG?]
It says AC charging even though it's not actually charging. Confirm this with for example battery monitor widget.
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Hello guys I need your kind help on the following questions
1- I bought an otg cable and found that it keeps disconnecting a lot, like when I connect a usb hard drive, or mouse, or xbox controller it keep every now and then disconnecting,
2- the sound volume is really low , especially when I play music
3- is there a software that can tell me about lenovo driver or software updates
4- when i press the power buttom to turn off the display youtube disconnects, i was wondering if i can play youtube while display is off, as I like to listen to youtube sometimes and don't care about the screen to be on
kindly please tell me in detail as I am still new to windows tablets especially drivers and software
i was wondering also is there a special forum for win8.1 tablets that is good for getting help
Mouse should be fine, but an xbox 360 controller is rated at 400mA of current draw officially and hard disks regularly peak at 500mA or more, the miix is only rated for 100mA on its USB. You need a mains powered USB hub inbetween tablet and device if you are going to use big power hungry devices like that, or one of those USB cables with split data and power connections and put the power connection to a mains adaptor or battery pack (you can buy battery packs with USB ports for charging phones).
Sound I have no idea.
Does the normal windows update facility not serve your needs? Just check back every few days.
Pressing the power button depending on power plan is putting your device to sleep or hibernate, all CPU activity is suspended in both of these modes.
SixSixSevenSeven said:
Mouse should be fine, but an xbox 360 controller is rated at 400mA of current draw officially and hard disks regularly peak at 500mA or more, the miix is only rated for 100mA on its USB. You need a mains powered USB hub inbetween tablet and device if you are going to use big power hungry devices like that, or one of those USB cables with split data and power connections and put the power connection to a mains adaptor or battery pack (you can buy battery packs with USB ports for charging phones).
Sound I have no idea.
Does the normal windows update facility not serve your needs? Just check back every few days.
Pressing the power button depending on power plan is putting your device to sleep or hibernate, all CPU activity is suspended in both of these modes.
Click to expand...
Click to collapse
can u send me link for org with power cable
hykhleif said:
can u send me link for org with power cable
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I haven't seen an OTG cable with it integrated, but there is no reason why you couldnt use this with your existing OTG cable:
http://www.newtech.cat/w/en/1473-USB-2-0-Cable-Double-Power-Injector--2xAM-AH--1-2m.html
On this cable there is 1 USB socket and 2 USB plugs. The black plug is a normal USB data connection which would normally plug into a laptop or something, you would simply stick that in the OTG cable, the white plug is wired for power only, this would go into anything capable of supplying 5v in a normal USB connector whether that be one of the wall adaptors supplied for charging phones or something like this: http://www.amazon.co.uk/Digital-Additions®-Battery-Extender-Batteries/dp/B002PHC1XU
Hello guys, I'm trying to interface android tab with peripherals. Problem is, it is having only one micro USB port which is used for charging and otg/host, only one function is possible at a time .But I need to charge the tab and simultaneously transfer data to peripherals, say for example I need to use external mouse and charge the tab at same time.
So, is there any way to do it?
I know usb has 4 pins 5v,d+,d-,gnd. I thought to wire charging input power to tab pin 5v and gnd and pin D+,D-of tab to mouse D+, D- and giving external power supply to 5v and gnd pin of mouse.
Is this a right method? To charge and transfer the data at the same time?
Kindly help me. Suggest a better way to do it.
(mini & micro) USB connectors have 5 pins: Vbus, D-, D+, Id, Gnd.
For OTG, the Id pin is connected to Gnd.
It's like the old adage, "You can lead a horse to water, but you can't make him drink."
You can connect a peripheral to an OTG host and have it work fine.
You can then connect an external power supply across the Vbus and Gnd.
The problem is, how does your host device know that it can "drink"?
There are basically two ways.
If the host detects power on its input before it switches into OTG host mode it may continue to charge.
If the host is in OTG host mode, device-specific commands to the charging circuits may convince it to charge.
There may also be non-standard Id resistor values for signalling host & charge for some devices.
I think your mileage would vary very much depending on what devices your using. AOS was not meant to deal with people hacking on the USB port, and probably the code to implement those features depend on your HW/FW.
If its a Samsung, you can play with some resistor values like these:
http://forum.xda-developers.com/showpost.php?p=25532839&postcount=2
I think the USB "CarKit" specifications should allow you both to charge and "connect" in some way.
A more easy solution would be to use a BlueTooth mouse and keep charging as usual.
I have the Galaxy S8+ Snapdragon and I love (almost) everything about it.
I am on a mission to have a portable desktop experience, but I am running into an annoying issue. I cannot find any solution to maintain a positive charging state whilst mirroring to an external display. Fast Cable Charging and Fast Wireless Charging both drop to regular charging speed when I am connected via USB-C to any external device. Regardless if I use the Samsung wireless fast charging dock or a USB-C dongle with passthrough charging, I cannot maintain a positive charging state and my battery gradually, or sometimes hastily starts to decline.
I have tried
EP-NG930TBUGUS Wireless Charging Stand
in combination with:
direct USB-C male-male connection to ASUS MB169C+
direct connection to any monitor with Samsung Superior "4K Ultra HD" HDMI Adapter USB-C to HDMI Adapter
I have also tried a USB-C hub: Cynergy mini USB C Docking Station USB 3.1 4K HDMI and Ethernet Multiport Adapter with USB C Power Delivery for Charging and USB 3.0 Hub
Every setup works! Mirroring is displayed at 4k 60hz, 4k 30hz, or 1080p 60hz, depending on which device is used. The only problem is, no matter what settings I change or other battery draining services I disable, the battery keeps decreasing, despite being in a charging (not fast charging) state.
Has anyone else tried this or been able to achieve what I have not? If I cannot do it, HOW CAN DEX DO IT? My thought is that it must be in the software to enable it if Dex is recognized, because they know they have the phone on a cooling stand and they don't want a bigass battery explosion mishap like they did with the Note 7. So, they intentionally disable fast charging while connected to external devices.
Fast charging is disabled once the screen is on, how do you know dex still allows fast charging while running??
peachpuff said:
Fast charging is disabled once the screen is on, how do you know dex still allows fast charging while running??
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Good question.
I gather that your point is fast charging is disabled with an external display is connected, because external displays are always on.
Unfortunately I do not have a Dex in my possession so I cannot speak to how it functions. That being said, regardless of whether my phone is in fast charge mode or not, my battery depletes when I am plugged into any external display. This includes external displays that have their own power source... like my TV for example.
So that would beg the question: how can Dex retain a charge on the connected external display when all other devices I have tested cannot? The only answer I can come up with is that the device allows an accelerated level of charging when connected to a predetermined external device. It makes sense, considering the Dex desktop experience can't seem to be invoked without being plugged into the specific Dex hardware...
Thanks for your response, I am looking for any and all constructive troubleshooting here.
Isn't the screen on when it's connected to the external display? That would disable fast charging.
Hi, did you find any solution? I'm on this mission too, in fact, i'm coming from a moto z because it lacks of hdmi output, and i think you already know that chromecast isn't a solution.