I'd like to connect to android powered tablet several peripherals (through micro usb I guess) like: couple of rs-232 ports, keyboard and even one rj12 port.. as I guess it's possible to create usb-hub-device to all this functions, and develop drivers for it.. I just never dealt with stuff like this before. What of it is possible and mb android have built-in support of some interfaces and devices..? goal is to make cheapest solid touch tablet based complete device.
For this to work, your Phone needs special USB-OTG-capable hardware. I doubt it has. If you don't know what it is and why it is definitely needed, google for USB OTG (on-the-go).
Of course, a simple USB host connector would do as well, but no phone has one (but some tablets do).
No android phone out now has USB host support, nor the drivers to run any peripherals.
thx for answrs, looks like its possible but I need to port usbhost module to device kernel.. and perpherals drivers modules too.
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
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:
---------------
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:
--------------
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.
I got an Anker OTG hub. It works completely if I connect it to my laptop, however, if I try connecting it to my phone, my USB mouse+keyboard combo (wireless with a receiver) doesn't work. It works with other devices, including my laptop's USB C port, and my old phone's USB C port.
I did turn OTG on prior to connecting anything (I'd love (root) to know to keep it on at all times).
I already ensured they work on other computers through that OTG adaptor, and that a USB storage stick works on this phone through it. In addition to that, HDMI works too (the adaptor also has an HDMI port), and the USB C passthrough passes power successfully, as well. No warp charging, but that is to be expected and that's alright.
I have TWRP and everything. Is there a kernel mod I need? I'd be happy to do whatever's needed.
Maybe OnePlus needs some updates
Even i have latency issus with my midi keyboard
But not with op5t
My Samsung S9 has had some screen damage and the touchscreen mostly does not work.
In order to navigate it I must use a mouse that I connect to the phone using the supplied USB C- A adapter.
I wish to get my phone repaired but I wish to backup all the data upon it first.
If I plug my phone directly into my PC, it asks for my permission to allow the PC access. However, since the touchscreen does not work properly, I cannot press the button to accept.
I could not plug both the mouse and PC simultaneously.
So I bought a USB-C hub. (Actually I've bought several, none of them have worked, this latest one is the most expensive and I had hoped it would work - (https://www.amazon.co.uk/gp/product/B07ZVKTP53/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1).
It has a separate port for USB-C Power Delivery and a separate one for data.
I plug the attached USB-C cable from the hub into my phone, and then I plug my mouse into a regular USB port, my charger into the USB-C PD port, and another USB-C to A cable from the USB-C Data port on the hub into a USB port at the back of my (new) PC.
Now my computer does not recognise my phone at all, nor does my phone seem to acknowledge it is connected to a PC. The mouse still works upon the phone and it charges fine through the PD port. If I plug the phone straight into the PC, it is recognised, so I do not think the problem lies there. The hub seems to block communication between the phone and PC.
I would like to backup my data and get my phone repaired. If anyone can solve the USB-C Hub issue or propose another solution to my problem then I would be grateful.
A mouse and keyboard will take priority over anything else in a hub.
I'm betting the hub's power is 2000mA or 2.0 Amps.
What does your fone charger state its power is? Add the mouse, keyboard, and fone's milliamps together. If it's more than the hub's power pack supplies....
In this situation, I would use Vysor, this will defo solve your problem, it allows you work with your fone on your pc/lappy by providing a lovely window that is a duplicate of your fone screen, you'll be glad you found this!!!
I can provide an old cracked version I used for my emergencies, if there is no objections?
Then you'll only need the mouse to use as your finger
Google Vysor. case closed lol.
Pachacouti said:
A mouse and keyboard will take priority over anything else in a hub.
I'm betting the hub's power is 2000mA or 2.0 Amps.
What does your fone charger state its power is? Add the mouse, keyboard, and fone's milliamps together. If it's more than the hub's power pack supplies....
In this situation, I would use Vysor, this will defo solve your problem, it allows you work with your fone on your pc/lappy by providing a lovely window that is a duplicate of your fone screen, you'll be glad you found this!!!
I can provide an old cracked version I used for my emergencies, if there is no objections?
Then you'll only need the mouse to use as your finger
Google Vysor. case closed lol.
Click to expand...
Click to collapse
Hi
Thanks for your reply
It's not a battery hub, but just a USB-C hub (check the link). Power comes from the PD USB-C port which is hooked up to my phone's original USB-C charger.
It also fails to work even when a mouse isn't attached to it.
I will look into Vysor. Also thought about the possibility of using a standalone bluetooth mouse which would free up the cable.
Your fone will suck the life out of a poorly powered hub, by using vysor, your pc/lappy mouse will work your fone using vysor, best app I've ever seen for working with broken screens, just plug phone direct into lappy, vysor works if you've no screen at all!!!!!
Use
Vysor
www.vysor.io
...Njoi
Dont pay for mouses/hubs in this scenario. Just pay for a top quality tool. I would place this as my number one android tool for ANY fone.
Again, if all your doing is data recovery (saving your stuff) I have a patch for an earlier version to unlock full version I swear by, you could use this once if only to try before you buy
The hub supports 85W fast charging directly from mains, which is what it is getting.
How do I enable USB debugging specifically for the app?
I have enabled it in developer options but when I connect my phone via USB to my computer as per the Vysor app, another window pops up on my phone asking to allow USB debugging. Ask there is no mouse attached to the phone at this point, I am unable to allow it.