[Q] Will this work ? - Galaxy S II Q&A, Help & Troubleshooting

Just wondering if a typical cell charger can provide enough power to power these three things. (or if it will even work properly)
1 The Phone
2 A USB flash drive
3 HML adapter
What I want to do is connect power to the USB splitter male (I already have a wall plug to USB female adapter) then with the USB female ends I will connect a USB flash drive and then use a male USB to male micro-USB cable to power the MHL adapter. The phone goes to the other micro-USB end of the MHL adapter.
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I want this for two reasons. 1 So I can play media from a flash drive to a TV or monitor and 2 (if this will even work) use it to connect a USB to XLR cable so that I can record with a better quality microphone to my phone.
I realize that the phone being able to recognize and use the flash drive or microphone may be an issue but I can take a chance on that if nobody can confirm if it will or will not work.
BTW: if you have not already noticed, we are finally starting to get some reasonably priced MHL adapters on fleabay now. They are ranging from around 20-26 CAD (one in picture is 26)

I would like to know as well, as that sounds like a great alternative to carrying around DVD's and stuff, maybe even an externally powered harddrive, would need extfat or ntfs support though for large files.
Sent from my GT-I9100 using XDA Premium App

Linux reads NTFS hard drives and flash drives fine, so I am hoping that Android should also.
I was planning on getting the MHL adapter regardless anyway, and the other cables that I would need would only be like 10 bucks. So I am wanting to try it out since, like you say, opens up more options for portability that may replace other devices or at least take up less space.
I was mainly looking to see if I would hear a show stopper of why not to do this, like if this set up could damage something that is connected.

K3VL4R said:
Linux reads NTFS hard drives and flash drives fine, so I am hoping that Android should also.
I was planning on getting the MHL adapter regardless anyway, and the other cables that I would need would only be like 10 bucks. So I am wanting to try it out since, like you say, opens up more options for portability that may replace other devices or at least take up less space.
I was mainly looking to see if I would hear a show stopper of why not to do this, like if this set up could damage something that is connected.
Click to expand...
Click to collapse
You will need a proper usb to go cable to connect the flash drive or hdd, i have connected a flash drive to my phone without any problems..
I would think you would need a custom kernels or ntfs-3G modules for the kernel you are using.
The big thing is if the phone can deal with being charged, output hdmi and connect to a HDD over the same usb port at the same time?
Maybe a powered hub?
Also wondering if there would be enough bandwidth on the bus to support that all.
The big thing that would be good for me is that I could buy a cheap self powered hdd, load it up with movies and stuff and watch it while at work where there's a lot of down time, and being able to charge and use tv out at the same time would mean I could watch the iplayer or something on the tv without having to worry about battery life!
Hey, connect a mouse and keyboard as well and your phone is basically a normal computer!
Sent from my GT-I9100 using XDA Premium App

Good idea. This powered hub is almost as cheap as the splitter cable and should take care of any power requirements.
As for the on-the-go cable, I have different angled micro male to usb female cables already so that I can help take stress off the jack when using it while charging. My USB flash drive does not power up with this cable. I just assumed it needed external power. What is different about the OTG cable, did they twist some wires or are mine just meant for charging if they are not working ? All the pins are present and the cable is thick, so no reason why they would not just connect everything internally.
Thanks for the replies so far.

K3VL4R said:
Good idea. This powered hub is almost as cheap as the splitter cable and should take care of any power requirements.
As for the on-the-go cable, I have different angled micro male to usb female cables already so that I can help take stress off the jack when using it while charging. My USB flash drive does not power up with this cable. I just assumed it needed external power. What is different about the OTG cable, did they twist some wires or are mine just meant for charging if they are not working ? All the pins are present and the cable is thick, so no reason why they would not just connect everything internally.
Thanks for the replies so far.
Click to expand...
Click to collapse
In order for usb to go to work you need a special cable, its got a special pin that's grounded or floating or has a few different values depending, the cables are very cheap on eBay or there's guides on how to make them.
OTG won't work with generic cables im afraid.
I just want this idea to work myself :d
Sent from my GT-I9100 using XDA Premium App

Im sitting here with a SGS2 with a USB kb, mouse, and a flash drive connected to it.
SGS2> (usb to go cable) > Powered hub > Mouse + keyboard + flash drive.
To get random devices to work (not hubs, input devices) you will need to add the device ids, see this thread for more info, more info and some device/vendor ids and a huge list of almost every device/vendor id
Attached is a rules file with logitech and some other vendors, add and expand as needed!
Now I need to buy a micro USB > many micro USB's and a mhl cable!
The powered hub is a must or stuff just wont work due to the power draw.
Im looking at picture of the MHL adaptor, and they all have a USB port for passthough, so we can defo at the very least charge while outputting via it.
The big question now is if you can daisy chain and do MHL and OTG at the same time!
Well, unless on a lucky chance the USB port will work with a splitter, you cant do MHL and OTG at the same time. A real shame

Thanks for the updates and links veyka. It also looks like the OTG cables do not charge the phone with the jumpered pins, so I will have to make sure and mark the OTG cables when they get here.
I should have the rest of my cables arrive in about 2-3 weeks and will post an update of what will or will not work. Sounds like the OTG cable alone should work with the USB to XLR cable for a microphone, as long as I can find a way to get the phone to recognize it. Though it would be nice to charge at the same time as well which the OTG does not support.
Do you know off hand what the headphone jack will accept for inputs ? Will it take TRRS or TRS audio in as well ? I am just looking at more options for XLR to the phone for connectivity without needing a mixer. Then I will use a mixer as well to see how much of a difference the balanced XLR out will make.

K3VL4R said:
Thanks for the updates and links veyka. It also looks like the OTG cables do not charge the phone with the jumpered pins, so I will have to make sure and mark the OTG cables when they get here.
I should have the rest of my cables arrive in about 2-3 weeks and will post an update of what will or will not work. Sounds like the OTG cable alone should work with the USB to XLR cable for a microphone, as long as I can find a way to get the phone to recognize it. Though it would be nice to charge at the same time as well which the OTG does not support.
Do you know off hand what the headphone jack will accept for inputs ? Will it take TRRS or TRS audio in as well ? I am just looking at more options for XLR to the phone for connectivity without needing a mixer. Then I will use a mixer as well to see how much of a difference the balanced XLR out will make.
Click to expand...
Click to collapse
In the end android should support anything linux does, you might need to build a kernel module (driver) or find someone that will for you.
You can get pretty much any input device going with the links above, but other stuff, I dont know im afraid
Hope lives eternal.
No clue im afraid

No problem bud. You have been more than helpful already. I already have a plethora of cables and devices for recording on laptop and PC with Windows and Linux. My Android uses for recording are so far purely just for practicing so that I have it down in case something of interest is created. So ease of use and portability is the main factor.
It also interested me just to be able to find different ways of recording since so much of it is done through software these says. The more knowledgeable I am with cables, signals and processing, the more options that I will have available to me. Though I still like to mic an amp then process afterwards.

Related

Finally 3 in 1 adapter 4 our Hermes!!

image speak clear:
ORA extUSB 3-in-1 Adaptor for HTC TyTN
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Seen on expansys.it at 16ā‚¬
Avaiable from 20 Feb
It's nice, but looks too big for listening on headphones while traveling.
now that is what you call multitasking!!!
wow thats what i need!
Again it depends on whether using the headphone adapter stops the handset microphone working. It's the one bug in the Martin Fields adapter.
Has someone tested it and can tell whether it is strong and reliable?
usb adapter
I got mine 2 weeks ago, it sits in the car and does a great job. it IS well made and not cheap plastic. now if ony i can plug a usb stick/hdd into it
azreal75 said:
I got mine 2 weeks ago, it sits in the car and does a great job. it IS well made and not cheap plastic. now if ony i can plug a usb stick/hdd into it
Click to expand...
Click to collapse
Mmmm ....... now that would be a thing of wonder and amazement.
Is there something like a Mini USB Memory stick ?
MyDraadloos said:
Is there something like a Mini USB Memory stick ?
Click to expand...
Click to collapse
Yes I'm looking for an adaptor so I can plug in a normal memory stick (using the usb host function) can anyone let me know where I can get one of these (UK ideally).
usb host -- external harddisk
The 3 in 1 adapter is one thing...
The message about enabling HTC to be USB Host ... is another.
Where did you find the needed drivers / s/w for HTC to be able to connect to a usb mem stick. (Or external HDD, or my Creative Zen Vision:M)
--
gdraanen said:
The 3 in 1 adapter is one thing...
The message about enabling HTC to be USB Host ... is another.
Where did you find the needed drivers / s/w for HTC to be able to connect to a usb mem stick. (Or external HDD, or my Creative Zen Vision:M)
--
Click to expand...
Click to collapse
i belive that we are limited to the hardaware....otherwise we could use the files from the UNI.
To those of you who have purchased this 3 in 1 adaptor:
Does the end which plugs into the Hermes have exactly the same shape as the port on the bottom of the Hermes (with all sides of the port at right angles except for one diagonal notch in the lower right hand corner), or is it a standard mini-USB plug with notches on either side of the plug?
The reason I ask is that I would like to be able to plug the HTC-designed cradle I bought from Expansys into a desktop speaker system, but the HTC cradle only has the standard shaped mini-USB ports.
Interestingly, the HTC cradle has two mini-USB jacks, one marked with the USB icon (for synchronizing), and one marked with a power plug icon (for charging). I wish it had a headphone jack too.
Why does HTC make it so hard to use this device to listen to music? How about an honest to goodness 3.5 mm headphone jack on the bloody device itself? How about not making us choose whether to charge the unit OR listen to music? I hope they don't wonder why the iPod is so successful, or why so many folks are interested in the iPhone...
Okay, rant over. Any ideas or pictures of the device side of the 3 in 1 adaptor (you could use the Hermes' built in 2.0 mega pixel camera!) from those of you who purchased it?
the hermes does not support USB hosting... just passthrough... therefore will not work...
ORA3-in-1
Project_23a said:
To those of you who have purchased this 3 in 1 adaptor:
Does the end which plugs into the Hermes have exactly the same shape as the port on the bottom of the Hermes (with all sides of the port at right angles except for one diagonal notch in the lower right hand corner), or is it a standard mini-USB plug with notches on either side of the plug?
The reason I ask is that I would like to be able to plug the HTC-designed cradle I bought from Expansys into a desktop speaker system, but the HTC cradle only has the standard shaped mini-USB ports.
Interestingly, the HTC cradle has two mini-USB jacks, one marked with the USB icon (for synchronizing), and one marked with a power plug icon (for charging). I wish it had a headphone jack too.
Why does HTC make it so hard to use this device to listen to music? How about an honest to goodness 3.5 mm headphone jack on the bloody device itself? How about not making us choose whether to charge the unit OR listen to music? I hope they don't wonder why the iPod is so successful, or why so many folks are interested in the iPhone...
Okay, rant over. Any ideas or pictures of the device side of the 3 in 1 adaptor (you could use the Hermes' built in 2.0 mega pixel camera!) from those of you who purchased it?
Click to expand...
Click to collapse
I was wondering the same thing. This would solve a huge problem that I am having with my setup as well.
walshieau said:
the hermes does not support USB hosting... just passthrough... therefore will not work...
Click to expand...
Click to collapse
I presume this means that you would not be able to plug in something like a USB memory stick with some sort of USB Mini adaptor ?
Just thinking outside the box, not even sure what I would use it for if it was possible.
Mmm .... I guess transferring files to TyTN when there is no USB cable or WiFi available.
Guess what I really need to do is to get as USB adaptor for the Memory Card ...
Right Angle or regular mini USB
Just wondering if anyone who has bought this knows if this is a right angle or a regular mini USB on the end that plugs into the phone.
I have one of these. Its brilliant, well... to an extent.
It has the same non-standard usb shape as the HTC plug that goes into the Hermes. It has to, to connect to Charging, USB and audio.
I use normal headphones with it, works a treat.
I also have a car mount, and my little project was to use my 2.5" Wifi all-in-one disc/access point in the car (Its a Asus something or other). Use WiFi on the Hermes to connect to 80G 2.5" disc in the car boot, and play music using cassette adapter through the car stereo.
Only problem is, if I mod my car mount so this adapter is in it permanently (which I have done), audio from the phone is always diverted through the adapter, whether you have phones plugged in or not.
Which means I wouldnt hear TomTom directions unless I was using the Phone for audio (i.e. not use car radio or CD).
I have this splitter as well. I ride a motorcycle and this thing is great: it allows me to listen to music and use spoken instructions from TomTom for navigation at the same time.
However, I do have a small question. I'd like to have an 'activation button' and a noise cancelling microphone in the helmet. Anyone know if there's a headset around that offers this, one where I could just cut off the earphones??
By the way, has anyone tried hooking up both regular headphones and a complete headset? Does the TyTN/splitter allow audio to both at the same time?
OK, I just got my new adaptor (Stereo Headphone Adapter For ExtUSB 11 pin to 3.5mm) and I was thinking that I can't really charge the phone while using it. This dongle might be the solution. Has anyone tried it with this:
Monaro427 said:
OK, I just got my new adaptor (Stereo Headphone Adapter For ExtUSB 11 pin to 3.5mm) and I was thinking that I can't really charge the phone while using it. This dongle might be the solution.
Click to expand...
Click to collapse
Why wouldn't you be able to charge the phone while using it? Bluetooth earpiece, regular headset, etc. all work fine while charging. Unless you mean 'on the road' when there's no wall outlet

Can i use a regular mini USB to update my G!?

Hi I lost my G1 cable and I wanted to know if I could use a regular mini USB to update my G1 without having issues?
Yes, you can.
Make sure the miniusb cable you are using has a ferrite core/bead on it. Some folks with poorly shielded computer innards have experienced data corruption on cables without ferrites. If your miniusb cable doesn't have one, look around the house for a computer cable with a core that you can remove.
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You can remove those things? I thought they were attached to the wire. I've just been using random junky usb cables with no beads on 'em and I haven't had any problems. I just checked the cord that came with the G1 and that doesn't even have a bead on it.
yeah hes saying, some people, so more often than not you dont need one, its for people who like to be extra safe especially if they end up bricking the device from corrupted data.
one thing that i have heard is that adb will not work if you are using a regular cable, there are a few extra wires and connectors in the usb cable for the G1, it is also a different shape than that of a regular mini usb connector. but for daily use, or just moviing files you shouldn't have any problems
Err, I have several mini USB's, I usually randomly grab one when I work with my G1, I have never had a problem with using ABD or any other type of problem. Also, I'm 99% positive the stock USB cable is no different then any other cable.
Wisefire said:
Also, I'm 99% positive the stock USB cable is no different then any other cable.
Click to expand...
Click to collapse
and i am 100% positive it is different from 99% of other mini USB cables. look at the input for the cable on your g1 and compare it to the mini USB port on anything else you have laying around your house and you will notice there is a difference
tubaking182 said:
and i am 100% positive it is different from 99% of other mini USB cables. look at the input for the cable on your g1 and compare it to the mini USB port on anything else you have laying around your house and you will notice there is a difference
Click to expand...
Click to collapse
Yes, The input is strange, The HTC Shadow is the exact same way. Do realize, the stock USB's "Head", the metal pin, is not the perfect match for the slot on the Dream, it's a basic mini USB. Although, The included stock headphone/ear piece's connector, does in fact fit the input in the exact manor.
I think it's just the "head shape" that is different. I hvn't had any problems with other USBs.
Yes, currently I am using a Blackberry USB cable, and ADB and all functions work properly. In the past, I've used the original G1 cable, one for a Canon digital camera and one for an HTC Vogue, ADB works for all of them. Most of all, USB stands for Universal Serial Bus.. so I assume they are all the same.
tubaking182 said:
and i am 100% positive it is different from 99% of other mini USB cables. look at the input for the cable on your g1 and compare it to the mini USB port on anything else you have laying around your house and you will notice there is a difference
Click to expand...
Click to collapse
It's an ExtUSB port, which is a HTC variant of the mini usb plug that has additional pins for audio. However the usb data lines are physically and electrically identical to standard usb, so for all intents and purposes unless you are using a special ExtUSB headset, it is plain mini usb. The supplied cable is a standard mini usb, so any other mini usb cable will work. Do heed my earlier warning to use a cable with a ferrite though.
I have about 30 different mini usb cables sitting around the house and i have probably used all of them once to or twice well doing playing with my HTC devices
Actually, that ferrite theory might explain things for me... I am experiencing some strange behavior when I use cables without the ferrite bead - the G1 will act as it's charging, but I don't get the "mount" option, i.e. it doesn't detect that it's actually connected to my computer. This happens both when directly connected to the computer USB port, and via a USB hub. I'm pretty sure that when I use a cable with the ferrite bead it also detects the computer and I'm able to data mount it.
Also, when using a cable without the bead, I have noticed that although the G1 says it's charging, it either doesn't or it charges really, really slowly, cause I could check by pressing power or menu once that it says charging - 76%, then turn off the display, then check again like half an hour later and it's still at 76%.
So I would actually say yes: the USB cable matters big time.
But of course, this is all based on my personal experience.
~Christopher
i plugged up an old desktop to retrieve some stuff the other day and realized that it didn't have usb2.0 and would not let the phone stay mounted. so just a caution if thats an issue.
grenness said:
Actually, that ferrite theory might explain things for me... I am experiencing some strange behavior when I use cables without the ferrite bead - the G1 will act as it's charging, but I don't get the "mount" option, i.e. it doesn't detect that it's actually connected to my computer. This happens both when directly connected to the computer USB port, and via a USB hub. I'm pretty sure that when I use a cable with the ferrite bead it also detects the computer and I'm able to data mount it.
Also, when using a cable without the bead, I have noticed that although the G1 says it's charging, it either doesn't or it charges really, really slowly, cause I could check by pressing power or menu once that it says charging - 76%, then turn off the display, then check again like half an hour later and it's still at 76%.
So I would actually say yes: the USB cable matters big time.
But of course, this is all based on my personal experience.
~Christopher
Click to expand...
Click to collapse
strange, that's a similar thing that happens when not using enough voltage (the battery issue). I have a homemade battery powered usb charger, but it's only 4.5v as opposed to 5v. This causes strange issues with my g1 and my girlfriends. do you have lots of things drawing power (LED lights, lit up SATA cables, tons of usb stuff etc) because that can cause instability with your computer and sometimes undervolting usb things.
Ferrite beads more have to do with interference which doesnt seem like issue. Although i'd certainly use a cable with a ferrite bead when flashing or issuing commands via adb, flashboot etc.

USB OTG (USB host functionality) on Razr - Working!

I'm assuming Razr support usb host functionality as the motorola multimedia dock has USB ports.
I connected a samsung micro usb male to usb A female cable to it with a USB key (checked with a pair of models), but couldn't reach its files.
The Razr couldn't see it.
Maybe I'm missing something as I'm new to android world, but USB host functionality right from the phone without too many adapters would be the first thing I would show to any Apple's slave to show what modern phone is expected to do.
Hope I wasn't wrong as USB host capability + Bluetooth 4.0 together with its fast response and good audio were the quite unique specs (at least on the same device) which lead me to invest on it!
Anyone found a solution to use a standard adaptor or are we tied to the motorola multimedia dock (or hopefully at least a smaller proprietary adaptor?)
Maybe something like the Xoom 'desktop hack' could be a solution or is there any simpler one? I don't know exactly if this hack gave also OTG functionality together with unblocking the desktop mode (couldn't understand from what I googled around).
[go directly to the post with the actual findings
http://forum.xda-developers.com/showpost.php?p=20008351&postcount=31
I'll update this first post with a resume of the findings as soon as I'll have time to ]
Check this thread http://forum.xda-developers.com/showthread.php?t=1343982#post19398196
I have usb host cable from my old s2 ,i have tried but doesn't works any usb pendrive or usb mouse/keyboard.
Inviato dal mio XT910 usando Tapatalk
can u provide a link where did u buy it?
Szadzik said:
Check this thread http://forum.xda-developers.com/showthread.php?t=1343982#post19398196
Click to expand...
Click to collapse
Didn't helped, as from my first post I already checked with a samsung adaptor and didn't worked out of the box.
asheg said:
can u provide a link where did u buy it?
Click to expand...
Click to collapse
I bought it in a real life store, actually 'Mondadori informatica' which had in stock Razr since the 10th of November.
If it helps it is Model: ET-R205UBEGSTD by Samsung.
I checked it with two FAT32 memory sticks and didn't worked
It's useless.
You need a powered USBHost cable, so you need to connect the 5V to an external battery or an external power supply, and TX/RX to the USB end of the device you are connecting to the phone.
Or, alternatvely, you need a powered USB Hub.
It won't just work. Motos don't give any output power from the USB.
so did anyone find working otg usb host so far?
i have the proper nokia cable which works on the Xoom but it wil not work on the RAZR (i assume) until like the Xoom a custom kernel can be installed to access this feature.
dont see that coming anytime soon (least not Verizon RAZR)
Can't you all read what someone writes prior you?
USBOTG WORKS ONLY IF EXTERNALLY POWERED. HARDWARE LIMITATION.
kholk said:
Can't you all read what someone writes prior you?
USBOTG WORKS ONLY IF EXTERNALLY POWERED. HARDWARE LIMITATION.
Click to expand...
Click to collapse
If OTG functionality were just a matter of powering a device with an external source that would not be a big issue considering the avaiability of power reserve devices.
I think a step forward in understanding Razr's OTG capabilities will be given dismantling a multimedia docking station and playing with it as soon as it will be available.
@Karmarock
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1 VCC Red +5 V
2 Dāˆ’ White Data āˆ’
3 D+ Green Data +
4 ID none Mode Identification
5 GND Black Ground
LapDock:
+5V and GND connected directly to the battery of the LapDock, TX+RX connected to the integrated USB HUB.
Docking Station:
+5V and GND connected directly to external power (5V AC), TX+RX connected to the integrated USB HUB.
Oh, in BOTH, for enabling the Host Mode, pins 4 and 5 are shortcircuited, exactly as the USB OTG specifications.
Dismounted a micro usb male to USB female cable, to my surprise found it with connection 4 free.
Hence made the 4-5 bridge and checked again.
Yet no usb host connectivity with an external powered 2.5 HD.
The HD happened to charge the Razr.
Hence modified the cable disconnecting the +5V.
Now I should have an OTG cable with an external powered devices.
As soon as I'll find back my USB Y cable I'll check with it and some external devices to see if any of them is recognized right out of the box.
Yet I suspect that, like the Razr Upon USB connection let you choose between some differents kind of connections, maybe some settings has to trigger host mode.
Any idea?
You've done something wrong, mine works fine in USBHost Mode.
kholk said:
You've done something wrong, mine works fine in USBHost Mode.
Click to expand...
Click to collapse
Details? 10char
kholk said:
You've done something wrong, mine works fine in USBHost Mode.
Click to expand...
Click to collapse
What an incredible news!
There are quite a bunch of posts around about Razr USB host capability, but up to now (to my google capabilities) no one succeeded in connecting any external I/O!
I'm pretty sure about the wirings (at least according to pure guessing from your schematics) as I checked all of them with a tester.
The wiring I made is quite simple
on the micro USB side:
contacts 4 and 5 bridged
Data wires connected to its corresponding ones on the female USB.
Power and ground on the female USB taken from an male USB connected to a charger.
Anything wrong?
Now it comes the detail requests:
1) What does it happen when you connect your cable to the Razr. Does it recognize it in some way giving any notice?
2) Rooted is needed? (Mine is not yet rooted).
3) Any special setup/tweaking to have OTG working?
4) Where do you access the external I/O contenct? From a directory in \SDcard otherways where else? Can you name it?
5) What I/O have you succesfully connected? Any kind of memory stick works? Any kind of HD? Mouse? Keyboards?
Thanks in advance in the name of all of the Razr's users interested in usb host functionality!
You would have to connect ground from the charger to the phone also.
pajn said:
You would have to connect ground from the charger to the phone also.
Click to expand...
Click to collapse
Thanks Pajn for the suggestion, actually updated the wirings but with no luck!
Are you currently using a cable like this to connect devices to your Razr?
If the following questions could be answered at least we would know what to expect when the wirings are correct!
Karmarock said:
Now it comes the detail requests:
1) What does it happen when you connect your cable to the Razr. Does it recognize it in some way giving any notice?
2) Rooted is needed? (Mine is not yet rooted).
3) Any special setup/tweaking to have OTG working?
4) Where do you access the external I/O contenct? From a directory in \SDcard otherways where else? Can you name it?
5) What I/O have you succesfully connected? Any kind of memory stick works? Any kind of HD? Mouse? Keyboards?
Thanks in advance in the name of all of the Razr's users interested in usb host functionality!
Click to expand...
Click to collapse
@Kholk
Some words about your experience are eagerly waited with great anticipation!
Karmarock said:
Thanks Pajn for the suggestion, actually updated the wirings but with no luck!
Are you currently using a cable like this to connect devices to your Razr?
If the following questions could be answered at least we would know what to expect when the wirings are correct!
Click to expand...
Click to collapse
To bad it didn't work
No I have not tested. I proposed it because it have to be so electrically. If you don't connect ground the phone have no possibility to read the signal.
IE. if you power to things from different sources you should always connect the ground.
I don't have a cable so I can't test myself
Karmarock said:
What an incredible news!
There are quite a bunch of posts around about Razr USB host capability, but up to now (to my google capabilities) no one succeeded in connecting any external I/O!
I'm pretty sure about the wirings (at least according to pure guessing from your schematics) as I checked all of them with a tester.
The wiring I made is quite simple
on the micro USB side:
contacts 4 and 5 bridged
Data wires connected to its corresponding ones on the female USB.
Power and ground on the female USB taken from an male USB connected to a charger.
Anything wrong?
Now it comes the detail requests:
1) What does it happen when you connect your cable to the Razr. Does it recognize it in some way giving any notice?
2) Rooted is needed? (Mine is not yet rooted).
3) Any special setup/tweaking to have OTG working?
4) Where do you access the external I/O contenct? From a directory in \SDcard otherways where else? Can you name it?
5) What I/O have you succesfully connected? Any kind of memory stick works? Any kind of HD? Mouse? Keyboards?
Thanks in advance in the name of all of the Razr's users interested in usb host functionality!
Click to expand...
Click to collapse
The first try was with the Motorola LapDock, the second one with a custom USBOTG cable.
When you connect the RAZR to the USBOTG cable or to a LapDock, it says that a dock has been connected to the device (HD Multimedia Station or LapDock, both are recognized as docks, obviously).
So you have to connect something to your RAZR and it will be instantly recognized but the USB Device Connected notification is shown only in WebTop, not in Android.
The USBOTG cable HAS TO give power to the RAZR and to the devices you're connecting to it, otherwise the RAZR won't recognize the Dock Connected status.
Be sure your AC power is 5V with at least 1A, otherwise there won't be enough amperage for RAZR and the connected device and since the RAZR has got the priority, you'll only charge the device's battery and your connected USB device won't have the necessary power for working correctly.
ROOT is not needed for OTG USBHost operation as the device has been configured by Moto to work in USBHost Mode.
When you connect an external pendrive, the device will automatically create a device node and will automatically mount the connected pendrive/USBHDD in a directory created in /mnt.
I've successfully connected all the device I was able to use on ATRIX, including keyboards, mouses, an 8GB PenDrive and a 500GB external HDD.
I'm also about to see if I can do a modification to the ATRIX LapDock for including into it another USB HUB and a switchable (ON/OFF) 2.5 250GB SATA->USB HDD. If I'll success in this, I'll also post on xda-developers a thread with the instructions on how to do that.

[MOD] Self Powered USB OTG on the HP Touchpad! (v2 Full Size) 11-30-12

First:
Major Credit to SDX's FTEN for being first with his very original idea and micro Usb version of this hardware mod. If it weren't for him, I would not have dared to do this.
See his original thread: Self Powered USB Host on the HP Touchpad! and at RootzWiki
SDX Version of this thread
Rootzwiki Version of this thread
DISCLAIMER: I'm not a dev, nor do I play one on t.v. Use the information and links at your own risk. Read and understand what you're doing FIRST is the best bet. I take no credit for the original idea, just ran a bit farther out on the branch before it broke.
Afterwards be sure to check out:
[Tips and Tricks] OTG (USB Host Support) - Requires kernel support
and
My 2 Port 2 Amp OTG Charger & Mod post further down.
This is a difficult modification that requires you to completely disassemble Touchpad (correct tools a plus), cut and dremel out excess material from the back cover (risk of permanent damage) and display frame. You also need to have some soldering equipment plus skill with very small circuit boards/traces (if you want more than a full size power port) and loads of patience (this took several hours over 4-6 separate days).
Still interested? Have a look:
Parts:
- USB-A Female Connector from a USB Extension cable (and it's spare wire)
(or optional microUSB breakout as FTEN used in his original version)
- Small, thin, SPDT switch (single pole double throw) from a Dollar Store toy, ie "DollarTree"
- VPack PRT-08290 (5v Regulator) and it's PDF Reference file
- micro USB (M) connector from a cable or OTG Adapter (if you can't get the Enable switch landed you'll need this cut up into a plug with the ID pin shorted)
( or maybe AppleCable's Powered OTG Cable )
Tools:
- Spudger Tool set (or similar for cracking open the TP)
- Variable Speed Dremel with "Rotary File" bit
- Decent Soldering Iron (ie: Weller WES51) with small conical tip, and small electrical solder (LeadFree compatible recommended)
- Hobby knife Set (ie X-Acto with various blades and handles)
- Hot Glue Gun and sticks
Basic Disassembly/Reassembly: iFixit's HP Touchpad Battery Removal Guide
(You should be confident with the above. Be prepared to break a few of the 7 clips; superglue helps).
The Finished Product:
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Part 0 - Parts, Planning, & Schematics:
My Original sketch of the wiring schematic for the mod
The 3.7v to 5vdc Step-Up Regulator board
My wife's Simon Toy supplied the OTG Enable Switch (she wasn't thrilled)
Here's another option for the switch from my local "DollarTree" store
Here's the Full Size USB-A Extension Cable before and after modifiying
Lesson Learned: Go ahead and strip the Potting Material off the USB-A (F) connector to expose the 4 solder points and remove the wires (or at least the 2 DATA lines). I think you will have better success if you "land" the Data wires and OTG Enable Switch wire to the TP's USB Controller Board first and then connect the leads to the USB-A Connector and Enable Switch since those solder points are more durable.
** Make sure that the cable wiring is "Copper Colored" not silver, etc. The copper wire will solder more easily without damage to the USB Controller Board later on **
Part 1 Pictures (MB Power Leads and Routing):
Part 1 pictures (Sim Slot Modification & Test Fitting):
When it's all mounted up (Later) the connector will stick out the back like this:
Part 1 Pictures (Regulator/Connector Placement and Wiring)
Soldering the Battery leads to the Regulator input (take time to get the length & routing correct)
* See Previous note about soldering Data and OTG Switch wire to USB Controller Board First *
Here the 5vdc to the USB connector is soldered to the Regulator Output & a DC Rtn from the regulator is soldered to the switch's "common".
Part 2 Pictures (Sim Slot/Display frame notching)
Part 3 Pictures (USB Controller Board info)
Part 3 Pictures (USB Controller Board info)
Note: You can skip this step if you just want a full size USB-A power port and don't care about it having working "data" communication and OTG Enable Switch (I screwed up the enable switch solder pad).
Please read the notes in the pictures for this section, they will help avoid my mistakes.
Part 4 Pictures (finished)
Updated: 12-3-12
Additional Reference Info
Here'a an OTG Cable reference schematic that I made to help people make their own OTG cables and OTG shorting plugs. It works as a good reference to figure out how a purchased cable is wired up (some are different).
And here's a picture of the micro-USB breakout board (4pins only) from Sparkfun.com that Ften used in his original mod mentioned at the top of the OP. If you prefer, you can squeeze this into the sim slot without dremeling the back cover to a "paper thinness" and hook up your data and pwr to it, but you will have to make or purchase a male microUSB to USB-A adapter (an OTG one would work since there isn't an ID pin hooked up). I avoided this option because I don't want someone hooking it up to a USB wall charger by accident and possibly killing the regulator
2 Port 2Amp USB OTG Charger & Mod
Here's an update...
My CrazyOnDigital 2 port charger doesn't have the data pins shorted (D+ and D-) like the stock HTC unit. This causes any "Android" phone to charge at the lower 500ma Max "Charging USB" rate vs "AC Charging" (explains my slow charging when travelling), but a bonus is that it allows me to pass data b/w the 2 ports like a simple hub.
- If the D+ and D- pins are shorted when an OTG USB cable is plugged in, the phone/device will go into "AC Charging" mode, but not allow OTG devices to work, but if the phone is still connected and the data pins opened back up, you retain "AC Charging" mode and have USB OTG functions.
(I'm thinking that a simple on/off switch installed across the data pins of my charger will give me a dual mode charger).
AC CHARGING / USB CHARGING (Data Pass Through) MOD 12-1-12
- I got tired of having a 2 port 2 Amp charger that only allowed 500ma "USB Charging" with Android & OTG. See pix:
Since breaking my power button and not knowing where to find a replacement part, I am very interested in what you are doing here.
I was considering finding a way to install an SDHC card in the same spot you've done your USB port. Do you imagine that there would be any additional complications?
I'd also like to add a power switch via the battery.
Sent from my SAMSUNG-SGH-T989 using xda premium
-SGA- said:
Since breaking my power button and not knowing where to find a replacement part, I am very interested in what you are doing here.
I was considering finding a way to install an SDHC card in the same spot you've done your USB port. Do you imagine that there would be any additional complications?
I'd also like to add a power switch via the battery.
Sent from my SAMSUNG-SGH-T989 using xda premium
Click to expand...
Click to collapse
In case you not aware there is an app called Button Saviour that can mimic all your hardware buttons including power.
Edit which I have just realised is of no help whatsoever if your Tablet is off . Best of luck.
-SGA- said:
Since breaking my power button and not knowing where to find a replacement part, I am very interested in what you are doing here.
I was considering finding a way to install an SDHC card in the same spot you've done your USB port. Do you imagine that there would be any additional complications?
I'd also like to add a power switch via the battery.
Click to expand...
Click to collapse
My suggestion for the power switch would be to get another TP off Ebay to rob for the switch (probably the only way I will get another USB board to finish my OTG mod 100%). I saw the guts of a 16gb (no screen assy) go for $41 the other day.
As for an SDHC card, don't know. You'd probably have to connect it the same way as the OTG connector (pwr & Data). You'd still need the switch or OTG plug to get the TP to check the bus, the 5v step up to pwr it, some sort of micro-Sd "socket (so there's room for the switch) and an app like "StickMount" to mount it for use. Ultimately, it'd still be OTG but without the option to connect anything else. I'd recommend the OTG port instead.
Edit: I updated Part 4 pictures with a fillet around the port and added a link to the OTG Tips & Tricks Thread (Evo3D)
i saw the orig post you referred to in your OP..
altho i like it very much and admire your work, i will never
be qualified to attempt it..
i just wonder why the cable still has to run outside from your new usb port to the micro usb port.
is it stupid to ask why it could not permanently connect from the inside and use a switch for charging / data transfer ?
again, i will never be able to do this so you could ignore this post..
also, from your evo 3d thread, i see that someone uses a 4 port 12000mah
battery charger for data... is this correct?..
i use a solar powered 4 port hub but would like to see a battery charger modded to charger / data transfer w/ a switch..
the solar hub of mine doesnt last so long
thanx foryour reply..
amkaos said:
i just wonder why the cable still has to run outside from your new usb port to the micro usb port.
is it stupid to ask why it could not permanently connect from the inside and use a switch for charging / data transfer?
Click to expand...
Click to collapse
Look closer at the USB Board post pictures. If the OTG switch wire is connected to the board internally, then no external setup is needed. I damaged the board just enough that I couldn't finish it until I can locate another board.
Others may not be willing to attempt the board soldering and choose only a full size power port (or microUSB) that needs the external cable that provides power back to the otg device plugged into the original port.
Sent from my "Up all night, Sleep all day" EVO3D!
mpgrimm2 said:
Look closer at the USB Board post pictures. If the OTG switch wire is connected to the board internally, then no external setup is needed. I damaged the board just enough that I couldn't finish it until I can locate another board.
Others may not be willing to attempt the board soldering and choose only a full size power port that needs the external cable that provides power back to the otg device plugged into the original port.
Sent from my "Up all night, Sleep all day" EVO3D!
Click to expand...
Click to collapse
thanx for the explanation.. i get it now..that makes so much sense
do you know what i was speaking of relating to the mod to a battery charger to switch between charge / otg ?
if possible to do , i could attempt that mod
amkaos said:
also, from your evo 3d thread, i see that someone uses a 4 port 12000mah
battery charger for data... is this correct?..
i use a solar powered 4 port hub but would like to see a battery charger modded to charger / data transfer w/ a switch..
the solar hub of mine doesnt last so long
Click to expand...
Click to collapse
I'm not sure what u mean by this. Post some links or quote the post and I will see if I can figure it out.
Sent from my "Up all night, sleep all day" HP CM9 Touchpad
shoot... sorry i thought i did link...
http://forum.xda-developers.com/showthread.php?t=1916638
to me , this is interesting because the OP shows a modded OTG cable to connect the mini port on his solar hub to the micro port of his evo3d..
this eliminates one cable:: from hub mini port to OTG usb..
he does say how it works but i dont know if the mod would be exactly the same for our HPTP..
i have that same self powered hub and it works fine.. just not much run time.. maybe 700mah.. iirc
secondly post #2 in that thread speaks of his 12000mah charger. it seems to me like he modded it to do OTG..
this would be good because of how much run time it would have..
could be great if he put on the charger a switch for charge / data transfer if it would need a switch to use like that..
anyway your current mod is soo ambitious but i saw you modded a wall charger ..
thanx again
OK I see what he did with the charger. It uses an adapter (host) cable to go from the main hub port to the PC (mini-USB to full size USB-A).
It looks like he spliced the micro-USB OTG cable (pin 4&5 shorted) to a mini-USB cable, and made a custom OTG Host cable. He mentions he disconnected/broke the +5v wire to prevent it charging the phone due to the small battery in it. I wouldn't do that myself, but I'd also ideally want a 3000-4000mah Solar Hub to modify for OTG & keeping the phone/tablet charged.
Have a look at my OTG cable schematics in reference post 9 above, particularly cable 1.
Sent from my "Up all night, sleep all day" HP CM9 Touchpad
mpgrimm2 said:
OK I see what he did with the charger. It uses an adapter (host) cable to go from the main hub port to the PC (mini-USB to full size USB-A).
It looks like he spliced the micro-USB OTG cable (pin 4&5 shorted) to a mini-USB cable, and made a custom OTG Host cable. He mentions he disconnected/broke the +5v wire to prevent it charging the phone due to the small battery in it. I wouldn't do that myself, but I'd also ideally want a 3000-4000mah Solar Hub to modify for OTG & keeping the phone/tablet charged.
Have a look at my OTG cable schematics in reference post 9 above, particularly cable 1.
Sent from my "Up all night, sleep all day" HP CM9 Touchpad
Click to expand...
Click to collapse
hi
so his phone supports data / charging at the same time?
but to mod an OTG cable for hptp and the mini usb port Hub, we just need to replace the usb end?
and leave pins 4 and 5 as they are?
How else would you make it instead..
I looked everywhere for a better self powered hub whether replaceable battery or not and would have liked to find something better.
thanx.. maybe I can try to make one

USB3 OTG Cable w/Y-Splitter for Power

http://www.dx.com/p/usb-3-0-female-...able-w-adapter-black-20cm-289081#.U4Sx-ii5IrM
Anyone use this or buy from this site? Seems cheap enough *lol* and free shipping to us Canucks! :laugh:
I think it would be the same with those listed on eBay, I bought OTG USB 3.0 and it works pretty good.
thanks for the info...
enroh said:
http://www.dx.com/p/usb-3-0-female-...able-w-adapter-black-20cm-289081#.U4Sx-ii5IrM
Anyone use this or buy from this site? Seems cheap enough *lol* and free shipping to us Canucks! :laugh:
Click to expand...
Click to collapse
i bought one of these from mobilepower on amazon, but it doesn't work. wanted it to power an external harddrive, but it was a no-go. my notepro recognizes that a usb connector was added, but doesn't mount the harddrive, even with the power pack attached.
however, i did get a usb2 otg cable and that works (pictured below). i don't know what the difference would be, perhaps i just got a dud with the usb3.
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-liquidquick
I've got one coming in in the next 21 days (HK shipping, lol) so I'll tell you what's what when it arrives over here.
In an effort to find a way to lighten my travel load just a little (normally travel with tablet and my macbook pro) for trips where I'm really not going to need the laptop I decided to try out using a 4-port USB 3.0 hub.
Just got it yesterday so I haven't put it through its paces just yet.
Here's a test setup I just tried using a USB keyboard, mouse, 500GB hard drive formatted exFAT, and a usb SD card reader. Test setup is powered by an Anker Astro2 9000mah battery and utilizes this USB OTG cable and this USB 3.0 hub.
At first the setup was a bit finicky. I had plugged everything in (the wire for the hard drive is the piggy back style where it has an additional connector for power) and the hard drive would not show up in file browsers. It wasnt until I unplugged all but the hard drive and ran the hub off of the tablet's power that the drive showed up. I then plugged back the power source and everything was fine after that as I inserted the keyboard, mouse and card reader. Further testing is needed but at least I know I can copy files from my DSLR cards to my HDD as a backup at my leisure back at the hotel on my next trip.
All of this is more proof of concept kind of stuff for me. When I travel I will be using a bluetooth keyboard and mouse that gets left in the hotel room along with the hard drive and hub. I'll carry around the tablet wherever I go but it's nice to know that in a pinch I can use it back at the hotel as more than just a tablet if I need to.
does that y-connecter power the tablet or the drive? my drive does not require power attached (its a USB3 WD Passport Ultra 500GB) but I need to power my tablet with the drive connected as i barely get over 3 hours of 1080p playback till I need to plug in.
if your cord doesn't I need to find one that does - if one exists...if not i may switch over to a Surface Pro 3 as it has USB3 fullaize and a sep. power connector...will buy a power inverter for my vehicle
muzzy996 said:
In an effort to find a way to lighten my travel load just a little (normally travel with tablet and my macbook pro) for trips where I'm really not going to need the laptop I decided to try out using a 4-port USB 3.0 hub.
Just got it yesterday so I haven't put it through its paces just yet.
Here's a test setup I just tried using a USB keyboard, mouse, 500GB hard drive formatted exFAT, and a usb SD card reader. Test setup is powered by an Anker Astro2 9000mah battery and utilizes this USB OTG cable and this USB 3.0 hub.
At first the setup was a bit finicky. I had plugged everything in (the wire for the hard drive is the piggy back style where it has an additional connector for power) and the hard drive would not show up in file browsers. It wasnt until I unplugged all but the hard drive and ran the hub off of the tablet's power that the drive showed up. I then plugged back the power source and everything was fine after that as I inserted the keyboard, mouse and card reader. Further testing is needed but at least I know I can copy files from my DSLR cards to my HDD as a backup at my leisure back at the hotel on my next trip.
All of this is more proof of concept kind of stuff for me. When I travel I will be using a bluetooth keyboard and mouse that gets left in the hotel room along with the hard drive and hub. I'll carry around the tablet wherever I go but it's nice to know that in a pinch I can use it back at the hotel as more than just a tablet if I need to.
Click to expand...
Click to collapse
enroh said:
does that y-connecter power the tablet or the drive? my drive does not require power attached (its a USB3 WD Passport Ultra 500GB) but I need to power my tablet with the drive connected as i barely get over 3 hours of 1080p playback till I need to plug in.
if your cord doesn't I need to find one that does - if one exists...if not i may switch over to a Surface Pro 3 as it has USB3 fullaize and a sep. power connector...will buy a power inverter for my vehicle
Click to expand...
Click to collapse
Doesn't power the tablet, it's meant to power the USB devices.
I'm no electrical engineer but I would imagine that once the tablet goes into USB HOST mode there are limitations as to where power is going to go and that the power is going to go to the external devices not the tablet. Still I've seen mention of cables existing that will power both but have yet to see any concrete evidence of them. Would have loved it if this one powered both ways but I simply have no need to work for hours on end with a hard drive connected to my tablet.
I would imagine that with power going to the hard drive with this cable though your video playback time would increase substantially, perhaps even double to 6 hours.
For me I just use mircoSD cards with my video content on them that I'll swap in/out of the tablet as needed.
I have yet to find evidence that anyone has successfully powered the tablet with one of the y-adapters while using another device. I prefer to use my external drive as it doesn't require power connection and is 500GB. Maybe I will have to go the pricier microSD card route and limit the amount of media I have on it.
Not ideal if you ask me. Not that the SP3 is perfect but at least power and USB3 are separate ports and at least 128GB though the one I am looking at is 256GB.
muzzy996 said:
Doesn't power the tablet, it's meant to power the USB devices.
I'm no electrical engineer but I would imagine that once the tablet goes into USB HOST mode there are limitations as to where power is going to go and that the power is going to go to the external devices not the tablet. Still I've seen mention of cables existing that will power both but have yet to see any concrete evidence of them. Would have loved it if this one powered both ways but I simply have no need to work for hours on end with a hard drive connected to my tablet.
I would imagine that with power going to the hard drive with this cable though your video playback time would increase substantially, perhaps even double to 6 hours.
For me I just use mircoSD cards with my video content on them that I'll swap in/out of the tablet as needed.
Click to expand...
Click to collapse
Yeah I wish there was a better solution. I have a Kingston MobileLite collecting dust over here. I wished that it worked well but it just plain doesn't. Large high res video file playback is hit and miss and the software that Kingston put out for Android is ****e. In theory this thing would be perfect for what you want, a separate device that you could power and use to share your hard drive wirelessly to the tablet to stream. In practice . . useless as far as I'm concerned. I dunno, perhaps all I need to do is re-encode my library of files to a format that will work with this device combo but I'm just not motivated to do that.
Sent from my SM-P900 using Tapatalk

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