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[HOWTO] Milestone USB-Host mode & using USB devices

Motorola Milestone - USB OTG - USBHost Mode
Found on Chris Paget's blog and since there isn't anything related, I'm postin' it here for xda-devs (with some clarifications and corrections in his words).
You’ll need to make two things, a micro-dongle to enable the USBHost mode (that you'll plugin during boot time) and a cable with the right connectors on each end (for connecting your peripheral).
To do this you’ll need three cables:
- A car charging cable (off-the-shelf at the Verizon store)
- A Micro-USB cable (as above)
- A USB extender cable (the tiny ones that sometimes come free with USB keys work great)
Start with the car charging cable. Break open the micro-usb connector (it comes apart fairly easily) and look at the little PCB inside – there should be a single tiny surface-mount resistor and two wires from the charger cable. Unsolder both wires and the resistor, and then bridge the pads where the resistor used to be so that it’s completely shorted.
The end result should look something like this:
{
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"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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(Micro Dongle)
Next up, you need to make your connector cable. Cut the end off the USB extender cable, you want to keep the socket end and discard the plug. Cut the micro-usb cable as well, but on this one you want to keep the plug and discard the socket. You should now have a micro-usb plug that’ll fit into your droid and a usb socket that you could plug a memory stick into. Strip the wires off the ends of both cables and join them to each other, connecting like colours (and the shield) together. When it’s finished it should look something like this:
For using USB-Host mode and your USB peripherals you have to do the following:
- Turn your Milestone off
- Plug the micro-dongle into the USB port
- Turn the Milestone on
- Unplug the micro-dongle as soon as the Motorola logo disappears (when the Android bootscreen is appearing).
Once your Milestone is booted, pull up a terminal and look at dmesg – after plugging in your USB peripheral using the cable you made earlier you should see the usual kernel notifications about new USB devices being connected; they’ll also turn on (or start charging) if they’re powered by USB.
You’ll only be able to plug in one peripheral before the port reverts to peripheral mode and you’ll have to reboot with the micro-dongle if you want to go back into host mode.
Also, if you leave the micro-dongle plugged in too long it triggers another bug, the port gets stuck supplying power to devices but not actually recognising them. Hopefully the drivers are sufficiently open-source that these are easy bugs to squash, and that dynamically switching between host mode and peripheral mode won’t be too hard to add either.
USB external storage won't work, but USB Keyboards are working. Anyway, we can compile a module for making the Linux kernel to recognize all we want since we can insmod as root.
--kholk

and the same text are here

Is it possible to load a module witch allows usb memory sticks?
Sent from my Milestone using XDA App

I made a USB host cable based on Gowthamj reply on the same blog.

Anyone sell this on ebay?

rizdroid said:
I made a USB host cable based on Gowthamj reply on the same blog.
Click to expand...
Click to collapse
Hi,
Some schematics or blueprint that you can upload here?. Look great!!!
EDIT: Got it!: http://sites.google.com/a/gowthamj.com/www/

i do host cable with blueprint from post #6 and... Something work
I'dont have any classic usb keybord (only wireless), but i try with usb storage.
After reboot and pressing button red led on pendrive blink a few times, after i release button (after M logo) they turned black.
It means that cable is ok, in dmesg i saw notification of connecting USB Device. But without drivers in kernel we can put this in our... boxes with accesories... kernel is locked, host usb is IMO only a funny feature of Motorola Milestone

Cant we use the modules they use to connect usb memory sticks to their N1s?
Would this work?
Sent from my Milestone using XDA App

royalcs said:
Cant we use the modules they use to connect usb memory sticks to their N1s?
Would this work?
Sent from my Milestone using XDA App
Click to expand...
Click to collapse
No, because the N1 uses a different kernel and modules as to the Motorola Milestone.

Is there a chance for external USB sound card to work?

bump!
I'm not a linux guy so anyway - do the drivers for usb host HAVE to be compiled in kernel? As on milestone the kernel can't be modified this implies the usb host on milestone works just with - usb keyboards?
Is there any way to use other usb devices? I'm asking because if not it seems it isn't worth to make the "micro usb host + switch" cable...

there is no way untill we can put or own kernel signed by owrselves on the milestone
Live long and prosper- tapatalk

thx but we all know that.

MuF123 said:
thx but we all know that.
Click to expand...
Click to collapse
so.. we all know that the only included driver available is for keyboard, no one has ever reported anything but, and yet... there is a post asking about it, isnt it?
Live long and prosper- tapatalk

Khul said:
so.. we all know that the only included driver available is for keyboard, no one has ever reported anything but, and yet... there is a post asking about it, isnt it?
Live long and prosper- tapatalk
Click to expand...
Click to collapse
could you please read what you post?
Khul said:
there is no way untill we can put or own kernel signed by owrselves on the milestone
Live long and prosper- tapatalk
Click to expand...
Click to collapse
You said kernel is locked.
We all know that.
And if being smarta*s is the only thing you can do here I think noone is interested in your posts Bye.

Please ppl don't become offensive...Just ignore some posts and let's continue to be productive about the topic

we can try to load modules for the kernel. no need for custom kernel. just compile the module sources against the milestone kernel and present libs (for ex. the now famous kernel 2.6.32.9-ge635aa4

so it is possible, but requires better knowledge of linux stuff like compiling etc - that I as a windows user don't know... however - for a person who knows how to do that - is it possible without much effort to do that? or do you need to code your own driver or what
edit> what do we need to do that? let's say I will come to my friend to do the compiling for me - what does he need to do that? how will I then use those drivers? is it same as in linux so will some guide for linux apply to android?

MuF123 said:
if being smarta*s is the only thing you can do here I think noone is interested in your posts.
Click to expand...
Click to collapse
wow jumpi huh? no need to mate, not being smarta*, just returning your "we all know that" right back at ya. nothing more, its all good.
anyways, i didnt think you could actually add more drivers and get them to load properly... thats nice to hear.
Live long and prosper- tapatalk

Awesome!!Nice guide!!! Thank you!!!

[KERNEL] [4.2.2 CM10.1][m4xx3d0ut][kexec,ath9k,rtl8187,USBhost][5/2/13]

so i thought this kernel may be helpful to others so i decided to post it. its a recompiled version of the cm10.1 kernel with Tasssadar's kexec patch applied (thanks Tasssadar!), added support for ath9k, and added support for rtl8187.
this will allow you to use TWRP multirom and boot android or pwnie express's pwn pad backup in which ever order you prefer.
also you may allow them to share the kernel and use (for example) an Alfa AWUS036H or a TP-link TL-WN722N usb wifi adapter with both.
it will allow multiple radios to be used at the same time via a usb hub (pictured) and packet injection works as well.
this is the part that i say "attempting to crack the key to a wireless network on which you are not authorized to is ILLEGAL and i do not condone such actions"
i am a security researcher and only conduct tests on my own networks or ones i am authorized to do so on, i recommend you do the same.
also, if anyone has an ubertoothone or some an industrial bluetooth adapter let me know if they work. if they do not i will recompile and we can retest, i intend on purchasing one as soon as i have the extra funding.
please let me know how it works and ill keep this thread updated with any optimizations i make in the future. enjoy!
edit: NEW UPDATE!!! kernel now implements host mode charging (charges with usb devices connected, power injection cable required) thanks Timur!!!
also i have designed a new power injection cable with a toggle switch for host mode charging.
it allows for a hub, external nic's, or whatever you want to be powered 1 of 3 ways.
1.) with an external power source (in this case the usb battery pack) sending power only to the external devices, therefore not adversely affecting the battery life of the nexus 7.
2.) switch flipped to the other position, nexus 7 will power attached devices and work as a normal usb cable plugged into otg.
3.) both nexus 7 and external devices will be powered by external source
first pic is n7 with 2 wireless nic's, a 4 port hub, and a usb battery pack
second pic is the switchable host power injection cable
third pic is screenshot of second wireless device up and charging icon on
fourth pic is basic schematic for power injection cable (note mine has extra female usb for 1 device at a time)
then last few are some picks from airmon-ng and aireplay-ng in a kali chroot
edit: NEW UPDATE 12/21/13!!! V3 NOW INCLUDES RT2800 AND SYSVIPC! POSTGRESQL NOW WORKING IN KALI!!!
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just recompiled today with some new features. last week i whipped up a nifty new power injection cable. enjoy!

Nice
Sent from my Nexus 7 using XDA Premium HD app

Super nice! I was going to build my extra cables tonight as well, but realized I was out of small heat shrinks. I need to order more.
"What do you tell a man with two black eyes? Nothing. He has already been told twice."

the cable is working out just as expected, gonna do some testing this week (ie- plug it in and test reaver against wps and leaving it plugged in on my network and launch some reverse shells from remote locations)

m4xx3d0ut said:
the cable is working out just as expected, gonna do some testing this week (ie- plug it in and test reaver against wps and leaving it plugged in on my network and launch some reverse shells from remote locations)
Click to expand...
Click to collapse
Looking forward to hearing some results. I still need to order my ext wifi, so it will be a bit before I can get started.
"What do you tell a man with two black eyes? Nothing. He has already been told twice."

i recommend TP-link TL-WN722N. its only $20 and it uses an atheros chip. as far as i have seen it yields the best all around results, it can also operate in master mode if you want to turn your ride into a wifi hot spot

m4xx3d0ut said:
i recommend TP-link TL-WN722N. its only $20 and it uses an atheros chip. as far as i have seen it yields the best all around results, it can also operate in master mode if you want to turn your ride into a wifi hot spot
Click to expand...
Click to collapse
Sounds good. I dont need a hotsopt though. I have an old linksys router loaded with dd-wrt in my car and set up as a wireless bridge.
Once I get the tp link, I want to add it to my small parabolic setup. I want some RANGE on the go, lol.
"What do you tell a man with two black eyes? Nothing. He has already been told twice."

funny you should say that, i was gonna set up a parabolic on my roof and a yagi for my adapters and see if i could get my network from the beach (only 1 block). they are next on my list so ill run some long range test too and post results.

For my house, I just jacked up my router tx to 210 mW, from 71. I can pick it up about 2 blocks from my house with little issue. Granted, I live in a more rural area and my "block" may very well be much smaller than yours. I have also thought about making a parabolic for here. I have a large 2 story and there is already a vacant dish network stand on the peak. I have an los of about 3 miles, so I think I could really get out there.
Btw: We talked about host mode charging on Ubuntu for N7. Looks like they released 13.10 Suacy Salamander today. Gonna see if they finally got it into thier kernel.
"What do you tell a man with two black eyes? Nothing. He has already been told twice."

Wow!
Could you please add support for the rt2800 driver? This driver allows dozens of compatible usb wifi devices based on the following ralink chipsets: rt3070 (ALFA AWUS036NH), rt5370, rt2770+rt2750(ALFA AWUS051NH/AWUS052NH), rt8070 (nano sized usb wifi superior to 8192cu-based edimax 7811).
Basically, the rt2800 driver seems to have far wider hardware support, including wifi cards with dual band, 5ghz capability.
Here are a couple of lists of compatible devices:
http://wireless.kernel.org/en/users/...800usb/devices
http://wiki.debian.org/rt2800usb
The rtl8187 is great but BG only and has a tendency to get warm (even hot). The AR9271 adds N but lacks the range and still 2GHz only. Don't get me wrong, I have both of these cards (I have four 036H Alfas, two AR9271-based cards, one is tplink 722n).

looking into it, ill pick up an adapter to test with asap

Hi all, just refered to this thread (thanks), I have the pwpad nexus 7 , community free image, it flashed ok and works as it should, I have the correct TPLink wifi, and bluetooth dongle(not ubertooth) as per pwniee site, incedentally I have it on the 16g wireless only model and it states req'd 32g and 3g, it doesnt seem to matter tho... the only think holding me back so far is lack of linux knowledge(learning fast...) as its new to me. I'm trying to have the TPlink usb wifi usable in both andriod and linux software and leave the internal chip wifi asleep forever...its range isnt good and it doesnt inject etc.So I was refered here and am delighted to see your work, Ive downloaded the kernel and will now 'swat up' on proceedures to flash it, will this do what I want?
Regards
Jay

well I flashed the kernel and it hasnt allowed the android aps to 'see' or use the ext TPLink wifi dongle, the functionality is the same as my previous custom kernel from pawnie, except I now have a few errors cropping up, more research required from me I guess and a flash back to the orig kernel to I know some more.
Regards
Jay

Hi,
could you please explain how to flash it with multirom ?
I would like to continu using my Kernel with Android Roms, and your Kernel with the Pwnpad community build
Many Thanks in advance

I don't believe you can flash it with multirom

vertab7 said:
well I flashed the kernel and it hasnt allowed the android aps to 'see' or use the ext TPLink wifi dongle, the functionality is the same as my previous custom kernel from pawnie, except I now have a few errors cropping up, more research required from me I guess and a flash back to the orig kernel to I know some more.
Regards
Jay
Click to expand...
Click to collapse
I'm not sure why you needed to flash this kernel since the Pwnie PwnPad image is supposed to support the rtl8187 and ar9271.

vertab7 said:
I don't believe you can flash it with multirom
Click to expand...
Click to collapse
I understood it should work according to the OP.
m4xx3d0ut said:
with Tasssadar's kexec patch applied (thanks Tasssadar)
this will allow you to use TWRP multirom and boot android or pwnie express's pwn pad backup in which ever order you prefer.
Click to expand...
Click to collapse
Sent from my Nexus 7 using xda premium

you can flash kernels with multirom, just use the option to inject current boot sector then select the image.
i say this kernel is usable with multirom because is was compiled to support kexec system calls (google kexec). this allows one running kernel to boot into another without shutting down. its a requirement of multirom.
as for android apps seeing your adapter i dont know of any that will, other than android pcap seeing an rtl8187. you need to manipulate your adapters from the command line. best way is with a chroot. you can use them to connect to ap's using tools like wpa supplicant, and any command line scanning tool will see them as long as you manually bring the interface up.

I mistakenly thought it may give fuctionality for the android tools to also use the ext TPLink dongle, not just the liux apps, my mistake. I have a few android tools (ie: Z-Anti, Dsploit) and want them to use wlan1 not onboard wlan0.
Learning fast...
Jay
---------- Post added at 11:06 PM ---------- Previous post was at 11:02 PM ----------
I can bring up wlan1/tplink ok in a terminal window/ssh, and scan, see ap's etc. but if I fire up an android app it says not connected .... is a little beyond me, at the moment. Not sure how android finds its device... maybe a question for an android dev forum.
regards
Jay

[Q] GT-N8013 + Powered Hub + USB Stick. No Dice.

Hey all,
I've been perusing these forums for a bit as a guest and have slowly accumulated a bank of information regarding the use of usb sticks on my Note 10.1.
I have the official OTG from Samsung. However, I've never managed to get any of my USB sticks (all less than 4GB and FAT32) to work on my Note. Sometimes the 'high power' message comes up, other times nothing.
I gandered that I have to get a powered usb hub. I bought a belkin model, the following image is the hub:
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The hard drive is on there to show that there's enough power running through the hub to run all of them. That little USB with the red light is the one I am trying really hard to access.
Here's the kicker. My Note 10.1 STILL doesn't recognise any of the sticks (I don't expect it to recognise the HDD).
Anyone have any ideas?
Thanks.

vika09 said:
Hey all,
I've been perusing these forums for a bit as a guest and have slowly accumulated a bank of information regarding the use of usb sticks on my Note 10.1.
I have the official OTG from Samsung. However, I've never managed to get any of my USB sticks (all less than 4GB and FAT32) to work on my Note. Sometimes the 'high power' message comes up, other times nothing.
I gandered that I have to get a powered usb hub. I bought a belkin model, the following image is the hub:
The hard drive is on there to show that there's enough power running through the hub to run all of them. That little USB with the red light is the one I am trying really hard to access.
Here's the kicker. My Note 10.1 STILL doesn't recognise any of the sticks (I don't expect it to recognise the HDD).
Anyone have any ideas?
Thanks.
Click to expand...
Click to collapse
I was able to get the 10.1 to recognize my usb drives by using the otg cable and the usb otg helper app that can be found on the Google play store. I bought a nice little 7 port powered usb hub from eBay, trying to get multiple usb devices to work simultaneously on the note 10.1 but havent been able to get ANY usb devices to be recognized by the note 10.1 through the powered usb hub.
Does anyone know of a usb hub that acts as a Bluetooth device? It would be cool to use usb devices as Bluetooth devices via some type of hardware medium.

I bought a cable from Amazon & bought a 64gb stick from Wal-Mart. My note recognizes it with no problem.
Sent from my SCH-I605 using xda app-developers app

Itbelikedat said:
I was able to get the 10.1 to recognize my usb drives by using the otg cable and the usb otg helper app that can be found on the Google play store. I bought a nice little 7 port powered usb hub from eBay, trying to get multiple usb devices to work simultaneously on the note 10.1 but havent been able to get ANY usb devices to be recognized by the note 10.1 through the powered usb hub.
Does anyone know of a usb hub that acts as a Bluetooth device? It would be cool to use usb devices as Bluetooth devices via some type of hardware medium.
Click to expand...
Click to collapse
Where exactly are you looking for your devices to show up. Also when you use the USB application and it finds your devices, can you manualy at the same time find the devices using something like es file explore.

shaun298 said:
Where exactly are you looking for your devices to show up. Also when you use the USB application and it finds your devices, can you manualy at the same time find the devices using something like es file explore.
Click to expand...
Click to collapse
I use astro or es explorer to browse through my files. If you use usb otg helper, there will be a button that says "mount" at the bottom of the screen. Plug your usb drive into you otg cable, plug your otg cable into your tablet, and then tap the mount button on your screen. Once your usb drive is mounted, use astro or es explorer to access your usb drive. If you still can't seem to find your usb drive, open up es file explorer or astro, go to the root folder, then tap on the mnt folder. You should see your usb drive in the mount folder, if you properly mounted your usb drive using the usb otg helper app.

Itbelikedat said:
I was able to get the 10.1 to recognize my usb drives by using the otg cable and the usb otg helper app that can be found on the Google play store. I bought a nice little 7 port powered usb hub from eBay, trying to get multiple usb devices to work simultaneously on the note 10.1 but havent been able to get ANY usb devices to be recognized by the note 10.1 through the powered usb hub.
Does anyone know of a usb hub that acts as a Bluetooth device? It would be cool to use usb devices as Bluetooth devices via some type of hardware medium.
Click to expand...
Click to collapse
That app if for rooted devices. I haven't rooted my Note yet.
I will do so in some time, but I want to figure out why this is happening. I mean, logic dictates that once the power is externalized, all the Note has to do is read the USB.
Yet, mine doesn't even manage to do that.
Are there any specific brands of USB flash drives that are more successful?

Reboot your Note.
Put the USB stick in the OTG adapter, and stick the adapter in the Note.
Does a message "USB Connector connected" appear?
But no USB device (you should have a USB symbol in the status line)?
Try a keyboard or a mouse: still no device?
What ROM are you using (Settings > About device > Build number)?

I have this USB connector that works fine on my unrooted Note 10.1, it lets you connect a single USB thumb drive. I do not believe you can get a USB hub to work on an unroot Note 10.1. As stated in post 7 you get better results if you connect the adaptor before starting tablet or connect adaptor and then restart Note 10.1.
You can find my adaptor here for $5.99 US http://www.ebay.com/itm/OEM-SAMSUNG-USB-CONNECTOR-P30PIN-EPL-1PLOBEGXAR-FREE-SHIPPING-/111160387393?pt=US_Cell_Phone_PDA_Cables_Adapters&hash=item19e1ace741

Sorry, I mustn't have use the term 'cable'. I have the same adapter as #8. Still doesn't work on all my sticks.
I will try the solution you have posted #7,

USB Audio

Hi all,
Just brought a Pixel 32gb coming from the 6P. With the 6p, I'm able to use USB-audio to my cars radio no problem. However, with my pixel - it doesn't want to work. Upon connection, it cycles through the USB modes (Charging, PTP and Audio Source,) which interrupts the connection process. With the 6P, it's a constant 'audio source' USB mode.
I should mention, that the times I've got it working, I've had to wait for the connection to time out, and cause my radio to throw up an 'Android error' (unable to connect.) Then I simply went into developer options and selected 'audio source' as the default method. When this worked, I wasn't able to use the radio buttons (pause / play and seek.)
Nexus 6P - 7.1 dev preview
Pixel - 7.1
Radio: Kenwood KDC200UB.
Thoughts anyone?
Thanks in advance,
Chicken

It doesn't sound like your head unit is demanding "USB audio" and I don't believe it should.. It sounds like your 6P is connecting as a hard drive and you're able to use the head unit to control the tracks. This is how pretty much all after market head units work, I don't believe there are any head units that act like a USB DAC (straight thru USB audio controlled solely by the phone with an analog/digital output).
In my case with my DEH4800BT, my Pixel automatically mounts as storage and the head unit reads the music content and is able to play/pause/skip directly from it. This should be what happens in your case, I had to play with mine a few times in order to get it to work.
Edit: I'm going to play with the OTG adapter and a male/male USB cable to see how my head unit connects. Just as an experiment.

I can assure you, my 6p is not acting as a hard drive due to the radio not supporting MTP. It's a Kenwood KDC200UB. It's using USB-passthrough, and yes, the radio does support it and many others do too.
You may search the radio google, and you'd find a feature called 'hand mode.' This allows Google play etc to pass audio.

You are right, I should have done the research. However your head unit is using AOA and not USB audio in the traditional sense, it's allowing the head unit to be a human interface device and not (just) a DAC .
Your Kenwood head unit technically requires the use of the Kenwood Music Play app however my pioneer also states it needs an app but I don't use one. I did have to cycle my device into midi mode once before it worked you could give that a try or maybe your head unit needs a software update? Are you using the cable that came with the Pixel?
Thank you tho, I never would have fully understood AOA if you hadn't suggested that I look it up.

Last firmware update was last year, the nexus 6p wasn't on the supported device.
It did try to connect to an accessory, which I thought was strange

mine did too the first time, which is why i shuffled thru the usb modes. When i was reading about AOA i found out that its now depreciated, so there wont be anymore updates for it.

k.s.deviate said:
mine did too the first time, which is why i shuffled thru the usb modes. When i was reading about AOA i found out that its now depreciated, so there wont be anymore updates for it.
Click to expand...
Click to collapse
I'm sure AOA2 is still being worked upon, no?

Just an update: popped into a car audio Centre, and tried roughly 40 headunits. Didn't work on any of them. I'm almost positive this is a 7.1 issue

I believe you need to change the way it connects to your USB port in the car. I changed it from charging to reading files. Pull down the notification bar and click on the USB notification to select how it connects to the car. Worked for me.

pixel-painter said:
I believe you need to change the way it connects to your USB port in the car. I changed it from charging to reading files. Pull down the notification bar and click on the USB notification to select how it connects to the car. Worked for me.
Click to expand...
Click to collapse
I'm guessing your using MTP connection, which does work. However, after trying 2 pixels, and a Pixel XL - as well as having someone in America try with a similar head unit - it's definitely a pixel bug / issue.
To reiterate, MTP works fine - but using Audio out VIA USB does NOT

Suicidal Chicken said:
I'm guessing your using MTP connection, which does work. However, after trying 2 pixels, and a Pixel XL - as well as having someone in America try with a similar head unit - it's definitely a pixel bug / issue.
To reiterate, MTP works fine - but using Audio out VIA USB does NOT
Click to expand...
Click to collapse
While I understand what you mean by MPT, you might be confusing some people since it isn't listed as such on my phone and probably for others too. It is listed as "Transfer files" as in my screenshot below. Perhaps it is a brand specific issue related to proprietary software, or a mod or app installed. I bought mine directly from Google and have never had this issue once File transfer is selected, but my pixel seems to default to "Charge this device" every time even if I change the settings.
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pixel-painter said:
While I understand what you mean by MPT, you might be confusing some people since it isn't listed as such on my phone and probably for others too. It is listed as "Transfer files" as in my screenshot below. Perhaps it is a brand specific issue related to proprietary software, or a mod or app installed. I bought mine directly from Google and have never had this issue once File transfer is selected, but my pixel seems to default to "Charge this device" every time even if I change the settings.
Click to expand...
Click to collapse
My phones not rooted, it's stock. Your image is relating to MTP / file transfer. My issue is related to Audio Out via USB using the AOA (Android Open Accessory) protocol.

Suicidal Chicken said:
My phones not rooted, it's stock. Your image is relating to MTP / file transfer. My issue is related to Audio Out via USB using the AOA (Android Open Accessory) protocol.
Click to expand...
Click to collapse
What is the drawback of starting using the method that works and stopping using the method that doesn't work?
A moment of nostalgic want for the old days?
If AOA is depreciated, 7.1 has forgotten it so it is not technically a bug but unsupported.
I get it is annoying if you're losing features to use the current working method of MTP / file transfer. Is that the case?
If AOA is depreciated, you may need to adapt to continue.
Sent from my sailfish using XDA Labs

nednednerb said:
What is the drawback of starting using the method that works and stopping using the method that doesn't work?
A moment of nostalgic want for the old days?
If AOA is depreciated, 7.1 has forgotten it so it is not technically a bug but unsupported.
I get it is annoying if you're losing features to use the current working method of MTP / file transfer. Is that the case?
If AOA is depreciated, you may need to adapt to continue.
Click to expand...
Click to collapse
It works on the 6p with 7.1 Dev preview.
Google's guidelines for nougat were that devices MUST be compatible with AOA. It's a bug.

Having this issue too and it sucks. I had a Nexus 5 and a Pioneer MVH-X380BT and it sounded great with the usb cable. Now with my Pixel my deck says error-19 every time I plug it in. I've tried going into the dev settings and changing the usb configuration and the app SoundAbout and it didn't make a difference. It was a pretty big difference in sound quality on the Nexus 5 between usb and bt and it's lame that the Pixel doesn't have the same audio support.
It would be amazing if Google backported aoa or someone made a mod to add it. That would be worth rootingng my phone for.

I also tried to connect my phone through USB, but it's not successful. Why google didn't provide an easy solution for such a long time?

I have a Pixel 2 and cannot get Audio out of phone to AOA device.
https://source.android.com/compatibility/android-cdd.pdf
In documentation it reads:
SHOULD NOT implement AOAv2 audio documented in the Android Open Accessory
Protocol 2.0 documentation. AOAv2 audio is deprecated as of Android version 8.0
(API
level 26). (page 102)
WHY must you do this Google!!!! :crying::crying::crying:

Question Using POCO X3 Pro as desktop ?

I intend to use my POCO X3 Pro as desktop. I would like to
a) connect external display monitor using some USB-C to HDMI cable or dongle
b) use keyboard and mouse (ideally wired but can use Bluetooth as well)
Does POCO X3 Pro on MIUI 12.5 support desktop mode? Any mods required ? Any recommendation for dock ?

dards said:
I intent to use my POCO X3 Pro as desktop. I would like to
a) connect external display monitor using some USB-C to HDMI cable or dongle
Click to expand...
Click to collapse
Cast to TV:
Miracast, Chromecast
Cast to PC:
GitHub - Genymobile/scrcpy: Display and control your Android device
Display and control your Android device. Contribute to Genymobile/scrcpy development by creating an account on GitHub.
github.com

Is there any app that changes the screen resolution/design to something more suitable for desktop operations e.g. something similar to Samsung DEX ?

dards said:
Is there any app that changes the screen resolution/design to something more suitable for desktop operations e.g. something similar to Samsung DEX ?
Click to expand...
Click to collapse
reportedly in the work but then again don't keep your hopes up that soon because it was teased for flagship devices and the chances that it would be ported to this phone is likely but lengthy

You can buy a usb-C dock, I've seen them for like 50Euro/$. If doesn't work just return.
I think video output will not work because we have USB 2 and not USB 3.
I've tried it in the past with a Honor View 10(USB 2-didn't work) and with a Mate 10 pro(USB 3- worked fine). Same chipset but different USB versions.
LE: desktop mode worked with wifi display though.

Use devices like This :
Amazon.com: 2 in1 USB Type C Micro USB to HDMI Cable MayLowen MHL to HDMI Adapter 1080P HD HDTV Mirroring Cable for All Android Smartphones to TV Projector Monitor: Computers & Accessories
Buy 2 in1 USB Type C Micro USB to HDMI Cable MayLowen MHL to HDMI Adapter 1080P HD HDTV Mirroring Cable for All Android Smartphones to TV Projector Monitor: HDMI Cables - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
This is casting via cable for any android devices without hdmi out.
Eta Price was recommending and testing on his channel.
I was testing it too and work perfectly with Poco X3 Pro, Huawei Matepad 10.4 Wifi 6 Kirin 820 and few another devices

dards said:
I intent to use my POCO X3 Pro as desktop. I would like to
a) connect external display monitor using some USB-C to HDMI cable or dongle
b) use keyboard and mouse (ideally wired but can use Bluetooth as well)
Does POCO X3 Pro on MIUI 12.5 support desktop mode? Any mods required ? Any recommendation for dock ?
Click to expand...
Click to collapse
USB-C HDMI support is only available on devices that support USB Type C 3.1 protocol, which unfortunately is not supported by any Xiaomi smartphones. I've researched about it because that's a functionality that I really want on my next smartphone.

astronomy2021 said:
Use devices like This :
Amazon.com: 2 in1 USB Type C Micro USB to HDMI Cable MayLowen MHL to HDMI Adapter 1080P HD HDTV Mirroring Cable for All Android Smartphones to TV Projector Monitor: Computers & Accessories
Buy 2 in1 USB Type C Micro USB to HDMI Cable MayLowen MHL to HDMI Adapter 1080P HD HDTV Mirroring Cable for All Android Smartphones to TV Projector Monitor: HDMI Cables - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
This is casting via cable for any android devices without hdmi out.
Eta Price was recommending and testing on his channel.
I was testing it too and work perfectly with Poco X3 Pro, Huawei Matepad 10.4 Wifi 6 Kirin 820 and few another devices
Click to expand...
Click to collapse
does this cast only specific apps or does it mirror the device screen?

khaotik said:
does this cast only specific apps or does it mirror the device screen?
Click to expand...
Click to collapse
This mirrors devices screen like show ETA Prime in his dedicated video.

@daeds for fully wired setup, you can try using usb type C hub + usb type a to hdmi Displaylink adapter and your mouse and keyboard plugged into it, as well as power. I didn't test it, but it should for work, although display resolution and latency will be limited due to slow usb2.0 bus. Poco X3 Pro doesn't support neither DisplayPort over type C nor MHL for better and more straightforwards experience, sadly.

What about this ?
I wish the demo phone language was English! I could not understand it completely.
Now I am
1- using Chromecast to connect display to desktop monitor
2- using Bluetooth to connect keyboard and mouse
Basically just need software to change screen Resolution, PPI and change interface to more desktop like.

Try scrcpy
You're welcome

then can someone explain me this on the developer options??
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

because this guy uses a normal type c to hdmi and used the developer options-> force desktop mode

Also, as variant you can use Displaylink Interface. I bought "cable creation usb 3 to hdmi converter" + "type-c hub with charging"

After a long time of absence I want to share with All Of You my way to use Our phone on external display.
First of all, my specs:
- Poco X3 Pro vayu 6/128
- 12.5.5.0 RJUEUXM
- Locked bootloader
- over half year of intense usage
I'm familiar with modding/rooting/flashing android phones since Galaxy S1 SGS, so I know a lot, but not everything I tried to mirror many phones on tv/monitors and only two of them worked "successfully", and now at last my Poco is working too. But... Not as I've expected. That's because I'm not rich enough to buy every cable/dock/adapter to test. So (after deep learning on web) I ordered to my favorite shop about 6-7 different cables similar to what I saw in movies and articles, and tested them before I buy the proper one. None of them worked - always the same "NO SIGNAL". Of course I did everything exactly as in guides many times with every adapter. Finally I decided to order one from China - one that worked flawlessly on every video guide I've found. But surprisingly my friend brought me his cable but not working with his phone. And after almost one hour of fighting with every settings and apps.... "finally!!!". At last I can play on big screen.
Happy for now, but I need the cable from those guides, because there's the same problem as I had with my Xperia Z3 (which has support for mhl/HDMI). The resolution is FullHD 1920x1080 60Hz as it should be, but the quality of display is way worse than on phone, and it doesn't send sound to display (need to listen from phone, thru speakers or headphones. Displaying is simultaneous on the phone and on tv/monitor at the same time. And it looks perfect on phone , but worse on external display. You can see it by Yourself. There's no way to improve it. That's why I need that cable from video guide because it doesn't need any app to start casting screen, and it displays with perfect quality on full display without resizeing. Even sound is perfect.
But for know I need to play with my friends cable. Here are photos and specs of it.
UNITEK - Mobile to HDMI Display Cable
M101AWH
I attached HDMI to external display, USB-male to my Poco's charger, USB-female to my Poco's usb-c cable, and lastly usb-c to my phone.
USB debugging ON, force desktop mode ON, and (because of this cable) installed EZ Cast app, and DisplayLink Presenter app. Every permission granted to them and turned off battery optimization. If adapter is plugged to charger there will be guide displayed on screen of monitor how to do it. With all this set up, just plug cable to phone and.... Sometimes one time and sometimes many times need to choose connection type popup "transfer files". Need to be patient and finally will popup notification to start casting/presentation. Please don't click on anything after plugging cable to phone, You can miss final notification. Even when it shows "x" on connection status.

UNITEK - Mobile to HDMI Display Cable
Click to expand...
Click to collapse
I looked into the cable on the official site and it does look like it'll work. I ordered the cable and if it works, I'll declare you my best friend.
Also, the cable is cheaper on the official site, which is not usually the case. They even ship to Turkey which is never the case. It's going so well, it makes me nervous.