I need to enable fast charge/AC on USB and keep it enable to communicate via USB. I need my tablet to charge as connected to AC and be able to transfer files in the same way as if I connect to a PC.
I will have a AC adapter in the middle powering the device 5V/2A, so I wont burn my PC USB port (I wont drain any power from the PC, just the D+/D-/GND Lines...). I know that I should not connect the tablet directly to a PC once I do this.
I have my device rooted, but I do not want to use a custom kernel. Is there anything I can change on my kernel to do this?
Once I think I saw some change that I must do in a system file to be able to do this, but I'm unable to find it now...
Thanks for any tip,
JS
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Hello Gents,
I purchased a USB OTG for my 7+ last week, all was working. the USB drives works, mouse works.
But this morning, when I tried to use the same mouse/usb drives. The tab does not seem to recognized the USB, I can see the LED on the USB blinks for a few moment and then turn off. Like it's getting power but then stop.
I tried the following.
1. reboot the tab. power on , power off. No go.
2. reboot from factory default ( yes it drives me nuts, but I did it anyway) Power Volume Up. Factory reset, data wipe. No go.
3. tried a new OTG USB cable, still does not work.
I had the Tab root before, but after the system reset, it gone back to stock firmware. The only thing I can think of is I did the latest Samsung Patch after my initial test.
When I look at the "dmesg"
s5p-ehci: detected XactErr len 0/8 retry
tspdrv: ImmVibeSPI_ForceOut_AmpEnable (1)
ImmVibeSPI_ForceOut_AMpDisable...
Does anyone have solution for this problem?
Thank
P.S. these are not the OEM Samsung USB cable. But they were working before.
Also, when I plug in an portable external HDD, it does say, High power device not supported.
hi,,,
try to connect all tools to usb otg hub first before you conect it to GTab. i mean if you want to connect a flash disk or a mouse, connect them to the usb otg hub first before connect it to GTab.
for hdd, you have to connect a power supply to usb otg to make it readable on GTab. i use my old nokia charger to power the usb otg hub device.
hope it help and sorry for my bad english.
dan
edit : i use this device as usb otg hub
http://db.tt/fmw1MhTY
I have the same error.
I have the same error but when I reboot my Tab, it's ok, before reboot I do not disconnect USB from my tab!You can try!
I have a custom USB peripheral that I use to communicate through USB OTG of the tablet. The device is wired in such a way, that I don't use a Y-cable. In the USB line, I have wired it so that the device can either be powered by the tablet, or it can be powered by an external power supply.
Scenario A:
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When the USB peripheral device is self-powered, it directs power to itself and sends the power to the tablet as well. The tablet is charging while hosting the peripheral device. The USB connection is still intact.
When the power is pulled, the USB peripheral device shuts off completely. What should happen is when the power is pulled, the tablet should detect this and start supplying power to the USB peripheral. This doesn't happen for some reason, until the tablet is rebooted. When the tablet reboots, it detects that there is a USB device plugged in, and starts supplying power.
Scenario B:
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When the USB peripheral is bus-powered, (meaning the tablet is currently supplying power to peripheral device and is currently hosting it), plugging in the power to the peripheral SHOULD start charging the tablet. This doesn't happen. Instead, the tablet continues to discharge.
So basically, I would like the tablet to supply power to the USB device when it detects that the power is gone. Alternatively, when the tablet detects power coming into its port, it should start charging.
Because I custom made the USB peripheral device, I am able to manually force the host to re-enumerate the device by pulling down the 1.5K pullup (hopefully you know which one I am talking about). Do you think this will work? In my application, I wouldn't have access to the OTG adapter and therefore I wouldn't be able to pull it out from the tablet. [That's what he said...]
How would I come to realize in my app that the power is lost and I need to re-initialize a new handle for the USB stream? Suppose I am able to do this, re-initializing the USB port will enable the tablet to start charging again?
Thanks.
Is there a way to charge an android device while it is connected to the PC?
Assume the device is draining its battery very fast due to some video or gaming activity and the PC cannot keep battery level stable. I would like to connect it to a USB charger at the same time, does such an adapter exists? I am afraid of damaging the PC or the tablet.
It is important to note that I don't need the android to work in hosting mode (OTG) but just for file transfer and adb port forwarding.
Since my tethered connection is throttled can I connect my flash drive to my phone and download over 4G? I have an OTG cable but nothing happens when I plug it into my phone and on top of that I can't find a No Root flash drive detection app to save my life. I thought my phone was rooted but it isn't according to the root apps I've tried. I can't even get those nonworking apps off my phone screen. Anyone know how to do that by the way?
dirigible said:
Since my tethered connection is throttled can I connect my flash drive to my phone and download over 4G? I have an OTG cable but nothing happens when I plug it into my phone and on top of that I can't find a No Root flash drive detection app to save my life. I thought my phone was rooted but it isn't according to the root apps I've tried. I can't even get those nonworking apps off my phone screen. Anyone know how to do that by the way?
Click to expand...
Click to collapse
It depens on OS version. For example some cables are compatible with dofferent OS versions, amd appearently it isnt compatible with yours
Sent from my LG-D722 using Tapatalk
dirigible said:
Since my tethered connection is throttled can I connect my flash drive to my phone and download over 4G? I have an OTG cable but nothing happens when I plug it into my phone and on top of that I can't find a No Root flash drive detection app to save my life. I thought my phone was rooted but it isn't according to the root apps I've tried. I can't even get those nonworking apps off my phone screen. Anyone know how to do that by the way?
Click to expand...
Click to collapse
The device itself has to physically support USB OTG. For USB OTG to work, the device has to provide power to the USB (not just receive charge from). Sometimes the solution to that is to use a powered USB OTG cable (this will have another plug to get power), but even in that case, the device has to have OTG support built into the kernel, which, if the device doesn't physically support USB OTG, it's unlikely to support it in the kernel.
Best bet is simply to download something to the phone and transfer it via USB to your computer.
Hello first sorry for my bad english, second i just got an older Asus Z380KL (runing Android 6.0.1 latest update from Asus) and its working fine for the most part. I just cant connect it to my PC (Windows 7/10) using USB. When i plug it in to my PC in device manager i dont see any new device but the Tablet is charging.
The tablet is in charging mode and i cant switch it to MTP. In Setting>Storage there is no option to change the USB mode, i dont get any notification in the pull down bar, in Developer menu i enabled USB debuging and tested the option to switch the USB configuration but if i change to MTP,PTP or RNDIS it always says Charging. I know the USB connector on the tablet is OK just tested my OTG cable and connected a mouse and it was working. Also i used 5 diferent USB cables that work when i try whit my Phone. Also tested all my USB2 and USB3 ports on my PC and laptop.
If anyone can help i wold be very grateful
Edit: Just tried it on Ubuntu 16.04 Live and MTP is working fine, Tablet connects i get the popup in the status bat saying i can pick if i want charging, MTP or PTP but on Windows 7/10 i cant get it to work its always in charging mode and i cant change it.