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Can we use the USB port to a serial device?

I have a piece of old equipment at work that i use a DOS program and a USB to serial adapter with a null modem cable to back up files off of the equipment. I installed DOS box and it runs my equipments program perfectly. Is it possible to communicate through the XOOM's USB port to my equipment using a USB to Serial adapter and null modem cable to do this with? Any help or advice would be great.
Thank You,
-Nathan

I guess I should take that as a NO!!!. I will pay to make this happen though!!

Bump
Sent from my PC36100 using XDA App

those usb to serial adapters use a Prolific chipset. Linux requires a kernel module to work with them. I suspect you'll need to build the kernel module and add a script to insmod it.

My boss will gladly pay someone to get this to work. If there are any Devs that want this project contact me and we can get this going. I know i can approve 1K to make this happen.

It can be done.
I have currently got my xoom setup so that I have a usb serial adapter connected to it for debugging purposes.
Do you know what chipset your usb to serial adaptor uses? I can then check if it is supported by the linux kernel.

evonate said:
My boss will gladly pay someone to get this to work. If there are any Devs that want this project contact me and we can get this going. I know i can approve 1K to make this happen.
Click to expand...
Click to collapse
I'm in. We'll start research. Sounds like fun.

Sign me up too. I would love to serial into Cisco devices with my xoom.
The following pieces of information i have already:
My usb2serial Adapter uses the prolific pl-2303 chipset
it is driven by the pl2303 kernel module.
the module depends on the usbserial module, which is already in tiamat as well as stock (its needed for the 3g modem i think)
So if i am correct we need the pl-2303 kernel module and a piece of software (minicom, cu) to use the serial (as far as i know there is no software in the market for this)

ok, i took a quick look at the tiamat git repository and it contains the pl2303 driver.
Now i am going to try to compile my own tiamat kernel
First time compiling linux for an android device

I would love to see this happen. I have tons of Cisco swithes and routers that I always have to configure on the fly. I know I can buy a bluetooth adapter but still have to power that :-( Would love to be able to hookup my otg cable, then my usb to serial, then to my console cable to configure everything.
Just not sure how to get the usb serial drivers installed on android :-(
If this ever gets working then my IT dept. will be getting a Xoom as well.
Thanks,
Ken~

Any updated news on getting this to work? Really don't want to spend $60 for a bluetooth serial adapter.
Ken~

I can try and include a few optional modules for the next tiamat release for usb serial devices

This is an old thread but in case ...
I also have to do serial communication with an old printer.
For now, I'm trying to prototype with an arduino mega using a trendnet usb to serial adapter.
I'm using the sample app on the market of this lib :
http://slickdevlabs.com/slick-usb-2-serial-library/
I actually can send and receive bytes on the xoom.
The only problem for now is that characters receive or send are not correct. I Don't understnd but still searching.
Any way, it should work ...
Mike

install bt5 and then install minicom under bt5. The pl2303 module with the pl2303 usb serial adapter does this very well.

bt5 you mean "backtrack 5" ?
I must use default rom ... My customer doesn't wan't to loose it's warranty ...
And usage of Motorola xoom is sure.
It might be another tablet.
Using capabilities that only requre Android 3.1 (without root) and a USB Host allow to change of device easily.

[Q] usb webcam's

usb webcam's tf101 mounted in my car 24x7 as a car pc so to speak.
And i'm wondering if anyone knows a way to add a usb webcam and record maybe a 1hr loop of video at 640x480+ res and say 15fps+ like a police dash cam in a way
Tablet is in a custom mount with dock so i have 2 usb ports.
Tablet is rooted and running team eos rom. It is a b70 sbv1.
I have made a few small apps to interface my tablet with my arduino over bluetooth. But thats about the best i can do
I have a small 7 tablet with a usb host bort and no cameras (tegra powered)
That i wish to use a usb cam with as well as a bike cam
As always the higher the rez the better
I have a tf201 as well

If it doesn't detect and use the usb webcam, then you're running in to the same problem I'm having with my usb headphone adapter, and will probably have to make a driver for it. If it's Plug and Play in a linux based operating system, you should be able to package the needed modules into a driver and add to a kernel. Get a terminal emulator and run lsusb with the cam unplugged, and then run lsusb again after plugging in. it should give something like this
--
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 <-- These were here already
Bus 001 Device 026: ID 05e3: 0610<-- These were here already
Bus 001 Device 028: ID 046d:0a17 <--- this is the new entry after plugging in/ (headphone adapter)
--
Then google the ID (046d:0a17, whatever yours says) linux module. You'll need kernel source from asus or other base kernel to work with.
--
also try dmesg immediately after plugging in and see if any errors pop up, if not then you need a driver.

[Q] USB/ Bluetooth development for special devices.

I just bought a TF700. I've never written a single line of code for an Android device. I've done some Linux development.
I want to build an app to control a Zoom HDZ300 AM/FM radio. It can be controlled remotely by simple messages sent to its serial port, but apparently the sending device does need to handle flow control.
The sound output is regular analog stereo. That will go into an amplifier, not my Android.
Does the Android operating system (Ice Cream Sandwich or Jelly Bean) allow programmers direct access to the USB or Bluetooth stacks so that one can enumerate devices and send/receive raw data to/from them ?
I am hoping to use the ASUS stand alone USB adapter, a USB hub and a USB serial port adapter to interface to the radio. I'd put a link here to the device, but I'm a newb and newbs are prevented from linking in their first 10 posts.
Does anyone see a problem with doing this ?
How would a Bluetooth Serial adapter work instead ? From the OS point of view, which would be easier/better to use ?
Thanks

I'd also like to connect and use an external USB sound "card". What are the issues with doing that ?
Thanks

[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

OTG + Charging using USB ACA (Accessory charging adaptor) on my Moto G (XT1032)

I was interested in getting USB OTG + Charging to work, and discovered that an "Accessory charging adaptor" was designed to serve such a purpose, the adapter is described in "Battery Charging Specification" Revision 1.2.
Here is a simple diagram of such an adapter (this design does not fully comply to the specifications):
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The code in 'drivers\usb\otg\msm_otg.c' suggests that the device can operate in the following 3 modes:
ID_FLOAT: Configure device to act as peripheral and allow charging if VBUS is present, else move it to LPM (low power mode).
ID_GROUND: Configure device to act as host and supply VBUS.
ID_A: Configure device to act as host and don't supply VBUS. In this state the device can charge as well.
So I built the adapter, and compiled my XT1032 kernel with CONFIG_USB_MSM_ACA,
unfortunately, (as far as I can tell) the hardware cannot detect the 124K resistor (so it does not automatically switch to ID_A).
Plan B:
It is possible however to modify 'msm_otg.c' and force ID_A (OTG + Charging mode), I was able to find an automatic method that works for me:
If you connect the ACA cable to a power source and a peripheral device and THEN connect your phone, the adapter will be detected as USB_PROPRIETARY_CHARGER (a dedicated charging port shorts the D+ and D- pins, and a flash drive does not),
so I simply assumed that USB_PROPRIETARY_CHARGER should activate ID_A.
I tested the patch (attached) using two Moto G XT1032 phones:
One manufactured in 2013-12-19 and have BOOTLOADER = 0x3 (with fastboot 41.13)
The other was manufactured in 2015-02-13 and have BOOTLOADER = 0x2 (with fastboot 41.18).
(the latest BOOTLOADER version is 0x4 with fastboot 41.1A, you can read the BOOTLOADER fuse using 'fastboot oem read_sv')
Other than the bootloader and MF date, the phones are Identical, same kernel, same system.
oddly, each behaved differently with the modified kernel and ACA cable:
With both phones, most USB peripheral devices were able to work when connected through a cheap (unpowered) USB 2.0 hub, this is the only hub out of the 3 tested that worked properly with the ACA cable.
The newer phone (but not the older one) had connectivity issues when devices were connected directly to the ACA cable.
To sum it up: I was able to use USB devices and charge at the same time using this patch.
maybe using two power adapters would have solved some of the minor issues I encountered (e.g. I could see the USB hub LED brightness fluctuate in some cases - it's not supposed to happen)
p.s. Using this patch, the phone exits ID_A mode once the charger is disconnected, and will provide power to OTG devices, so the patch does not interfere with the regular operation of the phone (unless you happen to have a real "USB_PROPRIETARY_CHARGER").
Components for the adapter:
USB 2.0 Male To Female Extension Cable
124K Ohm resistor (optional)
Micro USB Male to Female Extension Cable
Update:
I have bought the Acasis H027 and together with my patch I can use USB peripheral devices (connected to the hub) + charge at the same time.
p.s. USB Device Info shows the connected USB devices

This is great info! I'm a complete rookie when it comes to developing but I've jumped in. I'm trying to get my XT1060 (2013 Motorola Moto X Verizon Developer Edition) to do OTG and charging at the same time. I've downloaded the source from Motorola (here) and tried to enable ACA in the menu but I couldn't get it to compile. I then tried using source from @tycoo and @army9000 and their modified kernel (here) to enable this and recompile but again, I'm getting errors. I must be doing something wrong, either not enabling other items in the menuconfig that are required or I'm missing a lot more of the actual "meat" of the mods and just enabling an item in menuconfig. I know I've got my Ubuntu and toolchain all set up right because I can successfully recompile (using msm8960_defconfig only for some reason, msm8960-perf_defconfig and full_msm8960-perf_defconfig fail compile, some error about "this error is dumb" and acpulock-krait?) the source kernels (after a lot of work!) Think you could help me out? I'd greatly appreciate it.
I have a Nexus 7 tablet running Timur's USB Host kernel and a custom made USB OTG cable with power spliced it. Works great on the Nexus 7 but need it for the Moto X!
Unrelated to this topic, also trying to enable CIFS filesystem so I can mount a Windows network share in the device. Can't get that to work either I thought just enabling it in menuconfig.
Thanks,
Mike

Hey Mike, Did you unpack an existing boot image using Android Image Kitchen and replaced the kernel binary (zImage) with the one you built? that's the way to go.
Even with the XT1032 I'm having a few compilation errors that needs fixing due to different build environment, use the official source and search for solution to the compilation issues.
You don't have to change anything in the menuconfig at all.

Yes, I'm using the zip file from @army9000 kernel and replacing the zimage and modules to flash my recompiled kernels, works well!
I'm using source, both stock from Motorola as well as the one from @army9000, to build from. I'll have to see if I can figure out a solution with the info from your patch.

Yes! I can't believe my dumb arse got this working! Thanks so much @tal.aloni for your patch. I had to tweak it and I just manually edited my msm_otg.c file because I was afraid the patch would work with fuzz because the reference lines weren't the same. Like you said, I didn't change a single thing in menuconfig, just tweaked msm_otg.c and recompiled and flashed! The one thing I noticed is that it says its charging on USB, not AC. Hopefully the device doesn't slowly drain the battery due to lack of charging current, will have to troubleshoot. Thanks so much! And thanks @army9000 and @tycoo for the source to work with!
I have no idea how to use git and repositories, but credit goes to the above XDA members. Attached is the modified msm_otg.c file that has @tal.aloni's patch in it but modified for the Verizon Wireless XT1060 Developer Edition Motorola Moto X that I used to compile @army9000's 5.1 kernel (here).
Also, no idea why, but this seems to be the "process" for me to get my Moto X to properly do OTG and charging.
1. Boot up the Moto X
2. With powered OTG cable NOT powered, plug micro-B USB into phone
3. Plug in OTG device (usb-to-ethernet)
4. Plug in ethernet cable to adapter
5. NOW plug in USB power charger for power
6. Unplug micro-B USB from phone
7. Plug in micro-B USB to phone
8. Phone should have ethernet AND be charging (USB)
FYI, I'm also trying to get CIFS support working with this same kernel in the post for that (here).

OTG+CHARGING at same time
dear
tal.aloni and Mike7143,
thanks for your post and reply,
i am trying to do the same,
I am using
Kernel: github.com/akhilnarang/whyred
it does not has /usb/otg/ folder, so where to look for "otg+charging"
i try and test otg+charging on redmi note 4 (codename:MIDO) on lineage14.1
but i did not change anything in kernel,
just using instructables.com/id/DIY-Cable-to-Use-OTG-and-Simultaneously-Charge-the/
and it works fine,
*weblink is not allowed so i remove www
please guide.
thanks and regards.

jacob19 said:
dear
tal.aloni and Mike7143,
thanks for your post and reply,
i am trying to do the same,
I am using
Kernel: github.com/akhilnarang/whyred
it does not has /usb/otg/ folder, so where to look for "otg+charging"
i try and test otg+charging on redmi note 4 (codename:MIDO) on lineage14.1
but i did not change anything in kernel,
just using instructables.com/id/DIY-Cable-to-Use-OTG-and-Simultaneously-Charge-the/
and it works fine,
*weblink is not allowed so i remove www
please guide.
thanks and regards.
Click to expand...
Click to collapse
I don't know why there's no /drivers/usb/otg folder. Paging @akhilnarang to the thread, perhaps he can help you? Heck, maybe he can help improve the hack job I did for the XT1060 so my Wifi works and maybe CIFs as well! Doesn't hurt to ask!

thanks for quick reply dear,
I try and test
github.com/LineageOS/android_kernel_xiaomi_msm8953/tree/cm-14.1
for MIDO(xiaomi redmi note 4), it also has not usb/otg folder,
i did not change anything in kernel, but still it supports charging+otg ,
but then also it works,

Dear Sir,
I am using MSM8953 and Android 9, that I could not use ACA mode to charge and USB data transfer at the same time. Is there any comment for me?
Thank you.

Hi!
Is it possible to somehow enable that ID_A mode in kernel by just passing whatever parameter to kernel via terminal command line?