Develop Bugs

How to use the MHL adapter

I am really ignorant in the ways of using an mhl adapter. I ordered an adapter and and hdmi cable. The adapter has a port on one end for plugging the hdmi cable into to. The other end has a micro usb that plugs into my phone. On the side of it is micro usb port. Do I need to plug a power source into that port on the side in order for it to work?

ElAguila said:
I am really ignorant in the ways of using an mhl adapter. I ordered an adapter and and hdmi cable. The adapter has a port on one end for plugging the hdmi cable into to. The other end has a micro usb that plugs into my phone. On the side of it is micro usb port. Do I need to plug a power source into that port on the side in order for it to work?
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Yes it does need to be plugged into a power source.
Blasted from my Epic4GTouch con XDA-PA

Thanks for the info. That is what I thought.

ElAguila said:
Thanks for the info. That is what I thought.
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Yeah man it's pretty lame. If the length of the HDMI doesn't limit movement (when playing games) then the power cable sure will haha.

I bought a good thick usb cable of the same length as my hdmi cable. my tv has both hdmi & usb ports so for now I'm a pretty happy camper. All I'm missing are bluetooth keyboard and mouse

Lapdock HDMI

I can confirm that the lapdock does indeed work as a hdmi monitor and usb mouse / keyboard, I had some spare time and tried it out.
*update*
I just spliced a USB A to a micro USB female, works great on my ps3. I just connected USB Rx Tx and ground, Don't bother connecting USB +5vdc red as it sends power up stream and may damage whatever your connecting it to.
here's a video of it in action.
http://www.youtube.com/watch?v=On8e6kuqeF0
I sent an email to sparkfun inquiring about a micro hdmi female breakout board and here's they're response:
***
Level 1 [email protected] to me
show details 2:33 PM (1 hour ago)
Hi XXXX,
Thank you for your breakout board product suggestion. You bring up a great point about seeing this type of connection more and more. I will forward it on the appropriate people to see if this is something we can make and carry. Thank you again and have a great day!
Take care,
Pamela
***
Hopefully we see something from this.

great news!

callen81 said:
I can confirm that the lapdock does indeed work as a hdmi monitor, I had some spare time and tried it out. I haven't tried the usb but its just a matter of me splicing a cable together.
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It'd be awesome if you could post some pictures, such as a game console or camera

So far I just connected it to my laptop by holding it. I have an adapter I bought off dealextreme that converts micro female hdmi to full size hdmi. I had to file the female side down a bit but nothing more. If I can find my hdmi genderbender then I'll post it with my xbox360 or ps3. http://www.dealextreme.com/p/hdmi-male-to-micro-hdmi-female-adapter-converter-81206

that is awesome, a female micro hdmi to female hdmi cable is impossible to find I'm sure

What kind of usb slicing is involved?

stvmac11 said:
It'd be awesome if you could post some pictures, such as a game console or camera
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http://www.youtube.com/watch?v=On8e6kuqeF0 go here, I just made a simple video demo'ing it working with my ps3.

shanghei said:
What kind of usb slicing is involved?
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I just spliced a USB A to a micro USB female, works great on my ps3. I just connected USB Rx Tx and ground, Don't bother connecting USB +5vdc red as it sends power up stream and may damage whatever your connecting it to.

callen81 said:
I just spliced a USB A to a micro USB female, works great on my ps3. I just connected USB Rx Tx and ground, Don't bother connecting USB +5vd red as it sends power up stream and may damage whatever your connecting it to.
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What are you using the USB for for end-use? USB hub for the ps3?
I'm not familiar with the ps3

stvmac11 said:
What are you using the USB for for end-use? USB hub for the ps3?
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The lapdock keyboard and touchpad work just like a normal USB keyboard and mouse. I just used a ps3 as a good proof of concept. But it'll work on anything else that has HDMI / DVI and USB. I'm going to use mine as a cheap rack controller with a KVM.

@callen81, I see there are 2 HDMI to micro HDMI connectors on dealextreme. The one you've posted is $5, and the other one is $4.10. The cheaper one also has a smaller form factor. Maybe it'll fix without any modifications. Anyway, I just wanna ask is there any reason why you've decided to purchase the expensive one? Thanks!
Here is the link to the cheaper one.
http://www.dealextreme.com/p/hdmi-male-to-micro-hdmi-female-adapter-66079

Awesome find callen81!
If I get a "Gold Plated HDMI Female to HDMI Female Adapter/Converter" (search on dealextreme) coupled with the HDMI Male to Micro HDMI Female Adapter, I should be good to go right?
@callen81: Out of curiosity do you happen to have Rock Band 2 with a Rock Band 2 Guitar? If so, I'd love for you to run the auto-calibration test on the Laptop monitor and let us know what the Video Response Time is (aka input lag). If it's under 16.6ms, then it is considered sub 1 frame lag. If you don't have this, I'll do this test myself when I get my Laptop monitor up and running and report back!

callen81 said:
The lapdock keyboard and touchpad work just like a normal USB keyboard and mouse. I just used a ps3 as a good proof of concept. But it'll work on anything else that has HDMI / DVI and USB. I'm going to use mine as a cheap rack controller with a KVM.
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Any chance you can take a pic of the splicing?

SpeedBrkr said:
Awesome find callen81!
If I get a "Gold Plated HDMI Female to HDMI Female Adapter/Converter" (search on dealextreme) coupled with the HDMI Male to Micro HDMI Female Adapter, I should be good to go right?
@callen81: Out of curiosity do you happen to have Rock Band 2 with a Rock Band 2 Guitar? If so, I'd love for you to run the auto-calibration test on the Laptop monitor and let us know what the Video Response Time is (aka input lag). If it's under 16.6ms, then it is considered sub 1 frame lag. If you don't have this, I'll do this test myself when I get my Laptop monitor up and running and report back!
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I don't have Rock Band, that HDMI micro female to HDMI male looks identical to the one I have. Looks just to be cheaper? As well I just used a hdmi female to female gender bender for a wall plate and it seems to have worked fine. A HDMI extension cable would probably be ideal.

Where did you get the female micro usb as well? FRom video it looks like the hdmi adapter takes up almost all the room so I am just wondering how hard is it to fit them plugged in at same time

Is there anyway to make an extender (female to male) for both the HDMI and USB connections? I would love to be able to use my atrix as a webcam for skype or goggle talk since the screen blocks the view of the phone when the lapdock screen is up.

shanghei said:
Where did you get the female micro usb as well? FRom video it looks like the hdmi adapter takes up almost all the room so I am just wondering how hard is it to fit them plugged in at same time
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I had to file both the hdmi and micro usb female plugs down a bit, far as an extension cable for the atrix itself it wouldn't work as more then usb data is sent though the usb plug.

Mac Mini?
All the more reason to pick up the dock while its being sold for $50 on ATT.
Someone should connect this to a Mac Mini and you would have your very own PAAH (Portable as Hell Hackintosh)

acoustique said:
All the more reason to pick up the dock while its being sold for $50 on ATT.
Someone should connect this to a Mac Mini and you would have your very own PAAH (Portable as Hell Hackintosh)
Click to expand...
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You should look at the pandaboards, full opmap4 dev board with hdmi.

I plan on doing the same thing.
Ordered two of the link below thanks to your testing.
hxxp://wwx.sparkfun.com/products/9614
Plan on soldering them together to make a clean adapter. (Without the +5v connected, or with to power a beagleboard using the OTG port)
Had to de-link the post b/c I'm a "new" poster... long time lurker though

[Q] usb host - what adapter to get?

I'm a bit lost with this usb-a and usb-b stuff.
Should I get USB-A to USB-B Micro or USB-A to USB-A Micro?
I want to use this phone as host for various DSLR's. I'm rooted and have all the software needed for this.

EsPeHil said:
I'm a bit lost with this usb-a and usb-b stuff.
Should I get USB-A to USB-B Micro or USB-A to USB-A Micro?
I want to use this phone as host for various DSLR's. I'm rooted and have all the software needed for this.
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what you need is a male micro USB to female USB A.
Like the picture
Sent from my Galaxy Nexus using Tapatalk

So it doesn't matter if the micro male is a or b? I get the regular female side...

EsPeHil said:
So it doesn't matter if the micro male is a or b? I get the regular female side...
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You need an OTG Micro-USB B to Standard-A receptacle.

Could you share what exactly you want to so with dslr's?
Im a photographer and would love to use my Gnex as an alternative to Nikon's 700 euro WT-4 wireless adapter!

vyruz1986 said:
Could you share what exactly you want to so with dslr's?
Im a photographer and would love to use my Gnex as an alternative to Nikon's 700 euro WT-4 wireless adapter!
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If you've got a spare DSLR you can send it to Chainfire so he can write code for the Nikon variant of DSLR Controller!

Kalavere said:
You need an OTG Micro-USB B to Standard-A receptacle.
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Excellent! Thank you, very much.
The dslr controller should work cause I use 5D mark II. But I'm more interested using this as portable hdd and then send my pictures via ftp/email to the image developer back in our firm. AFAIK this should be possible. We'll see how it goes....

Galaxy S III MHL Adapter Supports USB OTG--Work with GN?

The new MHL adapter for the Galaxy S III supports both HDMI and USB OTG simultaneously, according to this article:
http://www.gottabemobile.com/2012/06/29/galaxy-s-iii-new-mhl-connector-also-enables-usb-on-go/
I'm wondering if this means it could be used for USB OTG with a flash drive while charging the phone at the same time--something that's impossible with current adapters and cables. And does it also work with the Galaxy Nexus? Does anyone happen to have the adapter and a GN to test this?

highvista said:
The new MHL adapter for the Galaxy S III supports both HDMI and USB OTG simultaneously, according to this article:
http://www.gottabemobile.com/2012/06/29/galaxy-s-iii-new-mhl-connector-also-enables-usb-on-go/
I'm wondering if this means it could be used for USB OTG with a flash drive while charging the phone at the same time--something that's impossible with current adapters and cables. And does it also work with the Galaxy Nexus? Does anyone happen to have the adapter and a GN to test this?
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My friend has an S3 and I know the 5 pin MHL adapter we use doesn't work with his because of the pin configuration, so I would assume if he can't get HDMI out using the 5pin, we won't be able to get HDMI out using the 11pin. Of course I am only guessing, but it makes sense to my mind.

I don't see how it could work, to use the HDMI out you need the charger cable plugged in to the MHL adaptor. So where would the OTG cable go?

danben7 said:
I don't see how it could work, to use the HDMI out you need the charger cable plugged in to the MHL adaptor. So where would the OTG cable go?
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Looks to me like the standard S3 MHL adapter has a micro USB "charging port". Could be that it could also accept an external drive. I don't have the phone or the cable yet, so I can't test. Maybe somebody who has both could post results?

it's not actually a charging port, it's a power port because apparently it needs more power to output HDMI, i.e. if you don't have the charger plugged in to the vacant port, no HDMI.

Samsung does sell a bunch of dual head micro usb to usb cables.... so maybe you need one of those and they sell this: http://www.samsung.com/us/mobile/cell-phones-accessories/ET-R205UBEGSTA which says it allows you connect drives, keyboards, etc to S3's....

Yeah those work, I actually use this one:
http://www.ebay.com/itm/Micro-USB-2...100-Note-i9220-Nexus-i9250-XOOM-/120894431890
or something similar, but you still can't use HDMI when you use those
you can however plug in keyboard, mouse, usb drive and anything else you want all at once which is cool

danben7 said:
Yeah those work, I actually use this one:
http://www.ebay.com/itm/Micro-USB-2...100-Note-i9220-Nexus-i9250-XOOM-/120894431890
or something similar, but you still can't use HDMI when you use those
you can however plug in keyboard, mouse, usb drive and anything else you want all at once which is cool
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Is that one on eBay compatible with the S3????? Isn't the pin out's different?

stan.s said:
Is that one on eBay compatible with the S3????? Isn't the pin out's different?
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only MHL is affected by the pins, usb OTG is not affected by the new layout

Charging while using USB OTG?

I use USB OTG pretty often and I want to be able to charge my device while using it for other things. Is there any type of splitter from microUSB (Male) to USB 2.0 female + microUSB female OR from microUSB male to 2x microUSB female?
EDIT: Found this using Google- http://forum.xda-developers.com/showthread.php?t=1856663

I would like to know the same thing. I noticed that Samsung sells a USB OTG cabe and was wondering if it has the ability to connect a charger to it like the HDMI adapter has. I'm surprised that no one is interested in charging their devices while using USB OTG. Someone please comment, is this possible or not. Thanks!!

MikeM said:
I would like to know the same thing. I noticed that Samsung sells a USB OTG cabe and was wondering if it has the ability to connect a charger to it like the HDMI adapter has. I'm surprised that no one is interested in charging their devices while using USB OTG. Someone please comment, is this possible or not. Thanks!!
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never mind, I misunderstood your post