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[Q] S3 bricked by OTG and Arduino

Hi all,
N00B here...ya post 1, got to start some time.
I have been experimenting around with my Verizon S3 and some USB devices via a USB OTG cable (to put the S3 into USB Host mode). Common devices like mice, flash drives etc where working great and I was about to start developing some code to talk to a Silicon Labs CP210x when I got the apparently not so bright idea to plug in an Arduino Uno R3.
Instant black screen and bricked.
I tried all the common stuff (cycle battery and SIM card, hard reset via the three buttons) and it appears to likely be in JTAG land.
The Arduino happened to be running a program to write data to its USB port.
I have two random guesses -
1 - The Arduino drew to much current (it was not being powered externally) and some part failed.
2 - The Arduino caused a buffer overrun which resulted in random code execution which resulted in random phone bricking.
Anybody got any ideas what happened? I sure would like to understand it as to not to inadvertently repeat it.

Any thoughts? Anyone? Or is this just to weird?

[Resolved] [tutorial] usb otg for desire s (saga)

This tutorial is aimed to ones who wish to have USB OTG Capability within their
HTC Desire S ( Saga ).
1: what you need ( software )
A USB host capable kernel or your Android Must support USB Host APIs.
if you don’t have proper kernel you will not get USB OTG support, in my case
I flashed kernel 3.0.76 from Stefan on ics Final v2.0 ,Android version 4.0.4, sense 3.6, Now there is another kernel, I have Hboot 2.0******.
Available with USB Host capability the version is 3.0.89, I have not tried this kernel
Yet, you can if you wish, you can find both of these kernels at XDA.
If your rom or framework does support USB Host APIs then may be you don’t need to flash
The kernels.
With a linux patched kernel USB devices are detected under “ sys\bus\usb\*.* “.
If your android system and framework supports USB Host APIs, Android will detect USB devices
Under “dev\bus\usb\*.*”
Install USB Device info from google play store.
Install USB Host Diagnostics from Play Store.
Install USB OTG Helper from Play Store or any other software like Stick Mount to mount your USB STORAGE DEVICE.
You must have root access and super user installed.
Before flashing the kernel always make a backup of your current Rom.
As in my case when I flashed the kernel my wi-fi stoped working and then I had to manually push some wifi related files to system directory.
2: Hardware
You need a USB OTG Cable, unfortunately USB OTG cables available in Market are not suitable for Desire S, because Desire S does not Power the USB Bus within its own, to wake up USB Host Capability for Desire S we need to short Pin 4 and 5 at Micro B plug, Micro B female is incorporated within Desire S.
If a cable with shortened pin 4 and 5 is available then you don’t have to make a cable.
Its recommended not to short pin 4 and 5 at micro B plug, its good to sold a 10k resistor between pin 4 and 5. Get a standard charging cable for you Desire S with Micro B Plug, First of all check this cable by connecting it to your computer, if charge only and disk drive options appears at your phone the cable is good for our purpose.
Secondly get one Standard USB Extension cable, this cable has 4 pin Male at one end and 4 pin Female at the other end. Cut this cable from the center, remove the shielding plastic and uncover the wires.
You will find four wires,
Red = POWER ( Normally 5 Volts )
White = ( Data- )
Green = ( Data+)
Black = GND ( Reference Ground for 5 Volts )
Get a soldering iron and a piece of solder wire.
Now pick Male end, cut white and green wires ( we don’t need them because we only need power wires from this plug ).
Now pick Female one, uncover the wires from this also, Make a joint of Male “RED” with Female “RED”, and Also Make a Joint of Male “BLACK” to Female “Black”, don’t cut “WHITE” and “GREEN” wires.
Now cover “RED” and “Black” with some sort of Glue or Adhesive Tape, Glue is better choice because it will prevent the wires from getting short, or you can use heat shrinking sleeve.
Now pick your standard charging cable and cut it from the center and hold the end having small Micro B Plug, uncover plastic shielding, you shall find following wires,
RED
WHITE
GREEN
BLACK
Now get the cable you already mad having Standard Male and Female and Make joints as follows.
RED = RED
WHITE = WHITE
GREEN = GREEN
BLACK = BLACK
Double check all connections and now the important part comes
Gently remove the plastic from behind the Micro B plug with sharp knife or cutter, be careful and be patient here because in a hurry you can damage the plug or wires.
After you remove the covering Micro B plug you will find “ RED , WHITE , GREEN , BLACK “ wires soldered.
Notice that only one point at Micro B plug is Empty, There you go, it is pin No 4 of Micro B Plug.
You will also see “BLACK” wire there, Now get your 10 k resistor, sold one end of the resistor to where the “BLACK” wire is soldered and sold other end to pin No 4 which you have already found empty.
Be careful here not to short any pins, it may lead to a disapointment. Your USB OTG CABLE is ready, put some glue where you find its necessary to cover and also over the Micro B plug from where you remove the plastic.
Now run USB Host Diagnostics and when it says to plug in then plug your micro B connector to the phone, you don’t have to apply power through mail connector until. USB Host Diagnostics should show
As following picture, it will detect USB root hub of the phone, if it does not detect anything then
May be there your cable is not prepared properly, or just Restart your phone after installing USB HOST Diagnostics and check again, USB HOST Diagnostics needs root access if USB HOST APIs or framework is
Not supporting USB HOST MOD.
Now apply power through your charger to MALE connector, after 5 or 7 seconds your phone will indicate charging, means the cable is correct.
Put a USB stick in USB Female connector, open USB OTG Helper and hit MOUNT, it will mount your USB storage device and will create a directory at the root of your SD card named “UsbOtgDrives”.
You can brows the files and directories of your device in that folder.
Un mount USB Mass storage through USB OTG Helper and connect any USB mouse and you will see a small cursor, its very small and but you can locate it, if pointer does not appear remove the power plug and connect again, same way you can connect a USB keyboard, connect a USB keyboard and open any text editor in your phone and check by typing from keyboard or open your sms editor and check it there.
You can get your device info with “USB Device Info” if you installed it from play store.

Wow...now...
that is one of the great tutorials that were missed
in our forum
many thanks from saga community:good:

asgardr said:
Wow...now...
that is one of the great tutorials that were missed
in our forum
many thanks from saga community:good:
Click to expand...
Click to collapse
I wrote tutorial, but there was a question i did asked, "does viper saga supports USB OTG AND USB HOST API, BUT UNFORTUNATLY NOBODY REPLIED, SO I SPARED SOME TIME AND INSTALLED THIS ROM TO MY DESIRE S, IT WAS ACTIVATING CAR DOCK MOD AS SOON I PLUGGED USB OTG CABLE BUT WAS NOT DETECTING ANY USB DEVICES, I SPENT TOW HOURS ON THIS ROM AND NOW EVERRY THING IS WORKING " MASS STORAGE, CDC-ACM- PL2303 SERIAL CABLE, CH340, CH340, SERIAL CABLE AND ALL HID DEVICES. IF SOMEONE IS GETTING PROBLEM CONNNECTING THOSE DEVICES, PLEASE PM, I WILL TRY MY LEVEL BEST TO HELP.

Many Thanks
MNASWL said:
I wrote tutorial, but there was a question i did asked, "does viper saga supports USB OTG AND USB HOST API, BUT UNFORTUNATLY NOBODY REPLIED, SO I SPARED SOME TIME AND INSTALLED THIS ROM TO MY DESIRE S, IT WAS ACTIVATING CAR DOCK MOD AS SOON I PLUGGED USB OTG CABLE BUT WAS NOT DETECTING ANY USB DEVICES, I SPENT TOW HOURS ON THIS ROM AND NOW EVERRY THING IS WORKING " MASS STORAGE, CDC-ACM- PL2303 SERIAL CABLE, CH340, CH340, SERIAL CABLE AND ALL HID DEVICES. IF SOMEONE IS GETTING PROBLEM CONNNECTING THOSE DEVICES, PLEASE PM, I WILL TRY MY LEVEL BEST TO HELP.
Click to expand...
Click to collapse
I tried ur tutorial with SVHD 2.1.0 ROM on my HTC Desire S with kernel 3.0.76 and it is working superbly, my wifi stpped working after the kernel flash but after flashing the boot.img via fastboot solved the problem .. I did not try to make a usb cable as u narrated instead I am using Y cable for it which has a separate mini usb power adapter and USB slot for pen drives... Many thanks bro :laugh:

Is there any existing cable on the market now that I can buy? I'm low on time to make my own

cable
broucker said:
Is there any existing cable on the market now that I can buy? I'm low on time to make my own
Click to expand...
Click to collapse
no such cable is available in market for desire s,you can try y cable with standard usb to otg converter.

Please can some one get a video of his tutorial for me to take a close look at it to make my own. I really need it to work on ds. Thank u all. I would be very happy to see that video

Just try to closely see the pictures and read care fully what I have written, in case if you feel difficult let me know , will try to spare some time to make video. Any ways it's easy.

MNASWL said:
Just try to closely see the pictures and read care fully what I have written, in case if you feel difficult let me know , will try to spare some time to make video. Any ways it's easy.
Click to expand...
Click to collapse
I am using a custom viper saga Rom, i've install the Stefan kernel, and I have closely followed everything step as you said, but still can't mount any drive. My USB host diagnostic show exact as your in the picture, but my USB helper still can't mount drive..... Please I need help fixing the issue

This Rome will not work.
Install victims saga 2.0 rom.
That will work.

Sorry virtuous saga 2.0

[cm11] Charging while on USB Host

Is there a similar interface to http://electronics.stackexchange.com/a/46918 to force charging while the device acts as a USB host?
Does anyone know which resistor value is required to otherwise enable charging?

Fr4gg0r said:
Is there a similar interface to http://electronics.stackexchange.com/a/46918 to force charging while the device acts as a USB host?
Does anyone know which resistor value is required to otherwise enable charging?
Click to expand...
Click to collapse
It should certainly work, as the phone should be able to act in OTG mode while being charged at the same time, when placed in Motorola lapdock.
There are (at least) some 100k and 200k (between pin 4 and 5, I assume) tests present in kernel (emu detection) that switch the behaviour, but I didn't need to look into it too closely so far. You'll have to study the source and experiment...

@Fr4gg0r
I have recently bought this USB OTG adaptor: http://www.ebay.com/itm/New-Host-OTG-Power-Cable-Micro-USB-Male-to-USB-Female-for-Galaxy-Note2-S3-S4-/191145599519?ssPageName=ADME:LCE:3160
It's the first OTG adaptor fully working for me. All my USB Flash drives are working without problem. It's also charging my Photon Q while using USB host.

[MTK6582] [KitKat 4.4.2] USB OTG no Vout on usb

Hi,
Have tried to enable USB OTG on my smartphone (a chinese MTK6582, branded Overmax Vertis 4011).
When I attach an USB OTG cable (alone or with any usb device), the only reaction of the smartphone is raise in sound volume (all the way up to 100%).
So I checked if the device supports OTG:
-USB OTG Helper shows that: root access OK, storage module Live, NTFS read-write supported (no module files (.ko) in the directory, so I assume they are built-in the kernel),
-USB Host Check showed: "handheld_core_hardware.xml" OK, but "android.hardware.usb.host.xml" not writable. So I changed the permissions, and both are OK now.
Attached an USB OTG again (in fact, just a plain plug), and there was no voltage, no matter if I shorted pins 4 and 5, or not. Still, shorting 4 and 5 has a "raise in sound volume" effect.
I plan to try an USB mass storage (pendrive), powered externally, and now questions:
-shall I isolate Vcc and ground from smartphone (powering only the pendrive, and connecting only the 2 and 3 pins of pendrive and smartphone)?
-shall I short the 4 and 5 pins - supposedly putting the USB in OTG mode? my doubt is whether it's necessary, if I don't draw any current from the USB port. Moreover, I feel a bit uneasy about the "raise in sound volume" effect,
-any other suggestions?
I know it's rather about hardware than software, but perhaps somebody here has enough knowledge/experience to help me?
Cheers
Janusz

Any advance man?

USB C with OTG with charging: Portables as Computers in 2019 and on

I'm seeing multiple kickstarters for "turn your cell phone into a computer" type appliances. Typically a keyboard thing that includes an OTG adapter, an HDMI output, etc... Most /claim/ that you can charge your cell phone while working. They are all overfunded (and shaky, I'm not recommending them)
I've tried many times to use phones / tablets as OTG devices to interface to hardware of different types. Everything from diagnostic tools to robot arms (no really, I'd post links but I'm a newbie here and linking is always suspect; I don't want to be accused of spamming).
One major issue always comes up: You can NOT charge while running OTG on /most/ phones. I've done a lot of research on this, and found a few older phones / tablets that seem to support it. I can't find a /single/ USB C based device that is known to do it. Perhaps it's just not an advertising point? MFGRs don't see most users doing that, so they don't support it?
So what am I asking?
1. Is anyone with a modern phone, especially USB C based, actually using OTG and charging at the same time? Please note: I'm NOT talking about charging the OTG device /from/ the phone, I'm talking about charging the phone while using OTG devices. If you are doing this, please: What phone, what OTG adapter?
2. Is this something people have an interest in doing? Why yes, why no? For me, I don't have any interest in using my cell as a computer, but being able to plug it into equipment and monitor / control operation while not running the battery flat would be great!
3. Is anyone aware of the actual specs, technical issues, reasons for the current state of affairs? I've started a web page to track this issue (again, not linking, not spamming) and would love to hear from anyone with direct knowledge of the technical issues involved. Why doesn't it always work? What specification needs to be met? What future is there for this sort of feature?
Here are the devices I understand DO support it:
RaspBerry Pi
Amazon FireStick
Amazon Kindle Fire 10???
Dell Venue 8 pro
HTC One M9
Lenovo Miix 2 tablet?
Lenovo Yoga Book
Moto G 4?
NuVision Tab 8 (Windows 10) after restart only?
Nvidia Shield K1 table??
OnePlus One
Samsung Galaxy S3
Samsung Galaxy S4
Samsung Galaxy S5
Samsung Galaxy Note 3
Samsung Galaxy Tab A7?
Samsung Galaxy Tab A8.0
Samsung Galaxy Tab S2??
Samsung Galaxy Tab S 10.5?
Samsung Galaxy View
Snes Classic
And here are some that support OTG, but will not charge at the same time:
Amazon Kindle Fire 7
Asus T100TAM
LG Nexus 5
LG Nexus 7
Samsung Galaxy Note 4
Samsung Galaxy S7
Samsung Galaxy S8+
Samsung Galaxy S9
Samsung Galaxy TabPro 10.1
Please do add on your info?

How's the research going? I've been looking for tabs that support USB-OTG and charging when connected to a powered USB hub as I'm planning a car install. Sort of interested in whether the newer tabs like the Samsung Tab S5E support this or not. That would be sweet installed into the dash!

Prostheta said:
How's the research going? I've been looking for tabs that support USB-OTG and charging when connected to a powered USB hub as I'm planning a car install. Sort of interested in whether the newer tabs like the Samsung Tab S5E support this or not. That would be sweet installed into the dash!
Click to expand...
Click to collapse
..
Sent from my SM-S767VL using Tapatalk

I decided to buy a Galaxy Tab A 10.1 2019 (SM-T515) and will report back with findings once I test with a USB C OTG Y cable adapter. It's possible that I may need to fabricate some discrete switch into the tablet's USB to alternate between OTG and charging. Not an ideal state of affairs.
Additionally, I've pondered whether devices with pogo pin dock connectors such as the Samsung Galaxy Tab S5E can charge that way whilst using the USB port for OTG devices. Whilst not strictly meeting the requirement of the list (one USB port charging whilst using OTG) it does present a compelling alternative.

It seems that with USB C, the "standard" includes OTG host charging but called pass through charging, dual role data or something along those lines. I connected my Tab A 10,1 to a Kingston Nucleum non-powered hub via the connected USB C lead, then plugged in a charger to another USB C port. Charging! Pretty much the same works whichever combination of connections is used. It seems the devices negotiate who is the power delivery and at what level. There are some settings in android to set also.

Prostheta said:
It seems that with USB C, the "standard" includes OTG host charging but called pass through charging, dual role data or something along those lines. I connected my Tab A 10,1 to a Kingston Nucleum non-powered hub via the connected USB C lead, then plugged in a charger to another USB C port. Charging! Pretty much the same works whichever combination of connections is used. It seems the devices negotiate who is the power delivery and at what level. There are some settings in android to set also.
Click to expand...
Click to collapse
Yes, but does it charge while also having other external devices such as a USB hard drive connected to the hub(which also requires being powered) at the same time? The USB hard drive receives power from the hub like it should and the device charges simultaneously?
Sent from my SM-S767VL using Tapatalk

I've tested with a USB mouse dongle, and when it arrives, my Meizu DAC pro. So far it seems positive. It does however default to the 5v charging level, but that's fine.

Prostheta said:
I've tested with a USB mouse dongle, and when it arrives, my Meizu DAC pro. So far it seems positive. It does however default to the 5v charging level, but that's fine.
Click to expand...
Click to collapse
Hey did you ever get this working? Does USB-C charge and connect devices simultaneously?
thx

Yes, everything works fine....sometimes. The Kingston Nucleum USB C hub has a 5v supply plugged into a 12v car charger port that has USB PD and QC3.0 options. The tablet is problematic in that once the power to the charger (and hence the hub) is removed after turning the car off, the tablet decides that it'll take over the role of supplying power to the hub which discharges the tablet battery whilst the car is off. Also, the hub doesn't always arrange the attached devices correctly, leaving the USB SSD unmounted and the tablet sat alone charging. I'm unsure what is happening, however I'll blame USB C for being a dumpster fire.

Prostheta said:
Yes, everything works fine....sometimes. The Kingston Nucleum USB C hub has a 5v supply plugged into a 12v car charger port that has USB PD and QC3.0 options. The tablet is problematic in that once the power to the charger (and hence the hub) is removed after turning the car off, the tablet decides that it'll take over the role of supplying power to the hub which discharges the tablet battery whilst the car is off. Also, the hub doesn't always arrange the attached devices correctly, leaving the USB SSD unmounted and the tablet sat alone charging. I'm unsure what is happening, however I'll blame USB C for being a dumpster fire.
Click to expand...
Click to collapse
Thanks, I've been looking for a tablet for car infotainment and gauges/data logging, finally decided on a Lenovo tab 4 8 plus Verizon model, precisely because it had a USB-C 3.0 port, and it is rootable. Then I started reading about the complicated mess that the USB-C standard is. Anyway I'll make a post in the General Discussion>Connected Car forums in a month or so when I get everything connected... work and kids always stand in the way of progress

Is that the place to discuss these things? I've had a lot of difficulty trying to find the best place for this, as most are either too specific or not quite on-topic.

I'm updating all of my comments in various threads on this. I've found that with my specific setup with the Kingston Nucleum hub, there are issues. I'm unsure as to the cause, but hey. Firstly, the tablet needs to be powered up before I turn on the car or at least supply power to the hub. It seems that if this is done the other way around, that is, to power on the car accessories (and hence the hub) then it seems to end up staying as the "device in charge" of the USB network. The tablet charges (slowly) but doesn't mount the USB SSD drive or the USB DAC. If the tablet is powering the hub (in charge, so to speak) then applying power to the hub via the car accessory supply has it working as expected. This does mean that the tablet ends up with a power drain when the car/USB power supply is powered down which isn't ideal. I've gotten into the habit of turning the tablet off when I park for long periods of time, however I need to boot it up to "take charge" of the USB hub network before I can start the car. It's a bit of a bummer.

Prostheta said:
It seems that with USB C, the "standard" includes OTG host charging but called pass through charging, dual role data or something along those lines.
Click to expand...
Click to collapse
Yes, my notebook has an USB-C port and can be charged via USB-C PD pass trough by a USB-C dock (USB hub with LAN). Why the Android Smartphones/Tablets don't do the same?
JamesMNewton said:
3. Is anyone aware of the actual specs, technical issues, reasons for the current state of affairs? I've started a web page to track this issue (again, not linking, not spamming) and would love to hear from anyone with direct knowledge of the technical issues involved. Why doesn't it always work? What specification needs to be met? What future is there for this sort of feature?
Click to expand...
Click to collapse
I found this diagram of a "accessory charger adapter" (USB 2.0 spec, not 3.0+?): https://superuser.com/questions/1124237/windows-tablet-otg-simultaneously-charge/1124354#1124354
JamesMNewton said:
Supports OTG, but will not charge at the same time:
LG Nexus 7
Click to expand...
Click to collapse
Charging+OTG was possible on Nexus 7 2012+2013 using a custom kernel!

Yeah, the Nexus 7 was one of the rarities amongst pre-USB3.0 spec ports that could be manipulated into simultaneous data and charging.
My ongoing concern is with ennumeration; I can get my Tab A10,1 charging through the hub easily. However, to access devices attached to the hub, the tablet needs to be active first and then power applied to the hub. Applying power to the hub first, then starting the tablet leads to charging only. The problem as I see it is the negotiation over host rights on a USB network, and whether re-negotiation or forcing priority is possible. It could be a hardware issue built into the USB-PD negotiation specs, a hardware issue with the tablet or simply a software issue in the tablet. I'm not really wanting to wade into the USB specs since they're notoriously vague and contradictary these days....

Prostheta said:
It does however default to the 5v charging level, but that's fine.
Click to expand...
Click to collapse
I would want to know why? It was the same with the Pixel C, but Notebooks will charge at faster speed via PD pass through.
skally said:
I tried powering the PixelC and it works but not at the same speed as the same charger connected directly. I estimate about 1-1.2A
Click to expand...
Click to collapse
PD charging of a Pixel 1 via pass trough (interesting read on PD negotiations):
"The USB Power Delivery behavior seen when the Plugable USB-C 3-Port Hub is passing through power from Google Pixel's own USB Power Delivery charger is a lot different from what you get when you plug the charger directly into the Google Pixel." https://gtrusted.com/review/how-the...google-pixel-phone-using-usb-power-delivery-2

JamesMNewton said:
You can NOT charge while running OTG on /most/ phones. I've done a lot of research on this, and found a few older phones / tablets that seem to support it. I can't find a /single/ USB C based device that is known to do it. Perhaps it's just not an advertising point? MFGRs don't see most users doing that, so they don't support it?
Click to expand...
Click to collapse
I was able to use the ethernet, PD pass through and USB host feature at the same time with:
1. Samsung Galaxy Tab A 10.5 2018 (Stock ROM)
2. Google Pixel 2 (LineageOS 17.1)
The USB-C standard really has made things easier! I was not able to use the HDMI output because these devices do not support DP alt mode! :-(
"USB C Charger RAVPower 65W Fast Wall Charger, PD3.0 & GaN Tech 2-Port Power Adapter" https://www.amazon.com/Charger-RAVPower-Adapter-Compact-Foldable/dp/B08MWG612F
"Dockteck 4-in-1 USB C Hub with [email protected] HDMI HDR, 100W PD, USB 3.0 and Gigabit Ethernet, Multiport USB Type C Adapter"
Amazon.com: dockteck 4-in-1 USB C Hub with [email protected] HDMI HDR, 100W PD, USB 3.0 and Gigabit Ethernet, Multiport USB Type C Adapter for MacBook/Pro/Air, iMac, XPS, iPad Pro 2020 2018 and More: Computers & Accessories
Amazon.com: dockteck 4-in-1 USB C Hub with [email protected] HDMI HDR, 100W PD, USB 3.0 and Gigabit Ethernet, Multiport USB Type C Adapter for MacBook/Pro/Air, iMac, XPS, iPad Pro 2020 2018 and More: Computers & Accessories
www.amazon.com
USB Device Info
---
Device Path: /dev/bus/usb/001/003
Device Class: Unknown (0x11)
Vendor ID: 2109
Vendor Name (reported): VIA Labs, Inc.
Vendor Name (from DB): not found
Product ID: 8817
Product Name (reported): PD3.0 USB-C Device
Product Name (from DB): not found
Additional Info
Interface #0
Class: Unknown (0x11)
Endpoints: none
---
Device Path: /dev/bus/usb/002/003
Device Class: Use class information in the Interface Descriptors (0x0)
Vendor ID: 0bda
Vendor Name (reported): Realtek
Vendor Name (from DB): Realtek Semiconductor Corp.
Product ID: 8153
Product Name (reported): USB 10/100/1000 LAN
Product Name (from DB): not found
Additional Info
Interface #0
Class: Vendor Specific (0xff)
Endpoint: #0
Address : 0x81 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Bulk (0x2)
Poll Interval : 0
Max Packet Size: 1024
Attributes : 00000010
Endpoint: #1
Address : 0x02 (00000010)
Number : 2
Direction : Outbound (0x0)
Type : Bulk (0x2)
Poll Interval : 0
Max Packet Size: 1024
Attributes : 00000010
Endpoint: #2
Address : 0x83 (10000011)
Number : 3
Direction : Inbound (0x80)
Type : Interrupt (0x3)
Poll Interval : 8
Max Packet Size: 2
Attributes : 00000011
Interface #1
Class: Communication Device (0x2)
Endpoint: #0
Address : 0x83 (10000011)
Number : 3
Direction : Inbound (0x80)
Type : Interrupt (0x3)
Poll Interval : 8
Max Packet Size: 16
Attributes : 00000011
Interface #2
Class: Communication Device Class (CDC) (0xa)
Endpoints: none
Interface #3
Class: Communication Device Class (CDC) (0xa)
Endpoint: #0
Address : 0x81 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Bulk (0x2)
Poll Interval : 0
Max Packet Size: 1024
Attributes : 00000010
Endpoint: #1
Address : 0x02 (00000010)
Number : 2
Direction : Outbound (0x0)
Type : Bulk (0x2)
Poll Interval : 0
Max Packet Size: 1024
Attributes : 00000010
---
Device Info
Device Path: /dev/bus/usb/002/004
Device Class: Use class information in the Interface Descriptors (0x0)
Vendor ID: 05e3
Vendor Name (reported): Generic
Vendor Name (from DB): Genesys Logic, Inc.
Product ID: 0749
Product Name (reported): USB3.0 Card Reader
Product Name (from DB): not found
Additional Info
Interface #0
Class: Mass Storage Device (0x8)
Endpoint: #0
Address : 0x81 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Bulk (0x2)
Poll Interval : 0
Max Packet Size: 1024
Attributes : 00000010
Endpoint: #1
Address : 0x02 (00000010)
Number : 2
Direction : Outbound (0x0)
Type : Bulk (0x2)
Poll Interval : 0
Max Packet Size: 1024
Attributes : 00000010
---

SGH-i200 said:
"Charging+OTG was possible on Nexus 7 2012+2013 using a custom kernel! "
Click to expand...
Click to collapse
Actually You don't need to modify anything with certain tablets to do otg and charging at the same time:
I bought a Lenovo tab 8 hd and only by using a so called "charging y cable" (please Google it) I was able to listen music through my USB dac and charge the tab simultaneously.
Maybe getting into developer mode helped? I don't know, but it's so easy to try...
Daniel