I have an AT&T Z998 phone running Android 4.1.2 that is rooted. I bought an OTG cord and nothing I plug into it will detect. Running an app called USB Host Diagnostics told me that the Android API supports it but does not detect the device.
I plugged the cord into someone else's phone and connected it to a male to male connector to plug it into my computer to see if it detects it. It detected it and started charging the phone, so I know the cord is not defective, but other devices such as a mouse, keyboard and flash drive are not detected (also, my computer doesn't detect my phone).
I've also tried it with a Galaxy Tab 2 7" tablet and my computer detected it but would not charge.
TL;DR - Device not detected with OTG cord but has manufacturer support for OTG.
Any help would be appreciated. Thanks!
Related
http://support.google.com/ics/nexus/bin/answer.py?hl=en&answer=2386439&topic=2375623&ctx=topic
According to the official Google Help Page, it should support USB Host. However searching online have returned a lot of out-dated threads about how the USB chip works when it was still running Gingerbread.
I have purchased a USB adapter, tried to connect any USB device to my Nexus S, and nothing happens. The USB port will not be powered. However quoting Google's official help text :
You may need an adapter to connect the keyboard or other device to your phone's USB port. To connect more than one USB device at a time, use a powered USB hub to reduce the drain on your phone’s battery.
This implies that connecting devices to your Nexus S will drain your battery?
I am very confused. I have no powered USB hubs so I cannot try to see if the USB host function is purely limited by the lack of power or the USB chip.
I am sure I am not the only person who would love this to work. Is there anyone who knows what does it take to get USB Host to work on Nexus S upgraded to ICS? (Despite Google's help site indicating that it should just works out of the box)
Thanks a lot.
So, I spent some money and bought a powered USB hub.
No it didn't work.
I think the reason is that the power is not being transferred UPSTREAM. For example, I have connected the USB hub to my Nexus S, and a Logitech wireless mouse receiver to the powered USB hub.
Although I am sure that the Logitech wireless mouse receiver has power (from the USB hub), the Nexus S does not recognize the existence of the USB hub, since the power is not transmitted from the USB hub back INTO the Nexus S.
Feeling disappointed, I repacked everything nicely and exchanged my purchase for a slightly more useful 16GB SD Card.
Does anyone has any information to how is this supposed to work?
Or should we assume Google has made a stupid typo in their help articles, and that the Nexus S will not actually work in USB Host Mode ??
anyone please?
I too am looking for answers. Anyone?
Sent from my Nexus S using Tapatalk
Here's another cross post from General/General (don't worry, I'll clean up after myself).
Here's a cross post from the Mesmerize thread where I'm not having any luck:
I have a 2.2.1 (rooted) Mesmerize and I can't get it to recognize anything plugged into the Samsung Micro USB to USB Adapter I just bought.
The phone is set to "Mass Storage" for USB and I've tried both USB Debugging on and off.
I can't get it to recognize any of 5 thumb drives that I've tried connecting to it. So either it's a bad cable, or something else in the phone is preventing the connection. Help, please!
EDIT: I'm possibly naive in assuming that this (reading a USB thumb drive from the phone) will work at all, but since they (Samsung) sell the cable and tout it as being capable of it, I must just be missing something such as a setting or the necessary version of Android or a wonderful hack from this group.
You are looking for something called USB hosting. It is a nice feature that hasn't been implemented on many devices.
It would be nice, but you would need an intermediate usb adapter that supplies power to the thumbdrive, as I doubt that the phone is capable of supplying power for very long.
Hello. I have a TF101 B60 model. It fails booting to recovery. I can not get it to talk to my WIN7, Mint15, WINXP PCs via USB. It does not get recognized by any. I replaced the USB connector, but that did not help. However; I purchased an ASUS USB adapter that plugs into the tablet and has a full size USB port. I can connect a USB thumb drive, serial port adapter and lan adapter to this USB adapter and the tablet will recognize all of them and work flawlessly. This is the part that confuses me. I have three cables. The original and two I got from ebay. None of these cable work connecting to a PC with Linux or WINDOWS. I can not boot into APX mode. I have spent hours looking a posts and most are fixed by replacing the cable. I have to believe the USB part works because of the adapter works with USB devices.
Any ideas on fixing this or on how to flash a new ROM. I am at .27 now. I can't root or flash withour USB?! I have not seen this as successful even using adb. You still need a rooted tablet. Any help would be greatly apreciated.
Pete
ASUS TF101
2x NEXUS 7
NOOK HD+ with CM 10.2
Unfortunately, if you cannot connect using the USB charging cable you will not be able to root. Many of us have tried to find a way to root using the tablet itself. It is not possible.
The USB host adapter may be using different pins than the actual USB charging cable so there could be a bad pin in the tablet connector that is causing an issue with the USB SLAVE when connecting to a PC. Not sure the best way to diagnose this other than try your cable with another Transformer (could be TF201, 300, 700 or 701) to see if it is recognized by your PC and cable.
I've been having trouble connecting my A8 via OTG for some time. I have a Syntec USB-C to USB adaptor, which allows me to plug usb to the phone via OTG. However, this doesn't work any more (it did originally).
Sometimes when I plug in a device, the phone flashes device connected / device disconnected, sometimes it says usb charging, sometimes it doesn't do anything. I've tested the adaptors connecting them to the thunderbolt port on my desktop, and they work perfectly.
I've also tested the adaptor by using it with a USB-C to usb-a cable to connect the phone to my computer. When the adaptor is on the phone end, it doesn't do anything, when it is on the computer end it works perfectly.
Is there something I can reset or change on my phone to get this working?? It's driving me crazy.
Thanks,
Nick
nicktrigger said:
I've been having trouble connecting my A8 via OTG for some time. I have a Syntec USB-C to USB adaptor, which allows me to plug usb to the phone via OTG. However, this doesn't work any more (it did originally).
Sometimes when I plug in a device, the phone flashes device connected / device disconnected, sometimes it says usb charging, sometimes it doesn't do anything. I've tested the adaptors connecting them to the thunderbolt port on my desktop, and they work perfectly.
I've also tested the adaptor by using it with a USB-C to usb-a cable to connect the phone to my computer. When the adaptor is on the phone end, it doesn't do anything, when it is on the computer end it works perfectly.
Is there something I can reset or change on my phone to get this working?? It's driving me crazy.
Thanks,
Nick
Click to expand...
Click to collapse
plug your phone into your computer and change the connection type to MTP
hI everyone in regard to otg using Usb and charging tablet at same time, I have a fusion5 tablet and a usb hub the kind with 3 usb hubs and a power in with a micro usb male plug. and a switch for otg or charge. Ive tried using a potentiometer to find the magic resistor value between pin 4 (the id ) and pin 5 ground of the micro plug.
(thought i had it at one point but not sure) as could play a avi file while charging) However now most of the timee either accesses the usb or charges, I can get it to do both , but stops charging after 8 seconds.
Anybody happen to know if a specific resistance value works for both charging and otg.
I have seen another schematic but havent tried it.
It doesn't sound like the micro usb otg cable to me. I built one without a resistor and mine works just fine. Have a look at your usb settings. Some devices require you select your choice: usb otg or charging.
nastiero said:
It doesn't sound like the micro usb otg cable to me. I built one without a resistor and mine works just fine. Have a look at your usb settings. Some devices require you select your choice: usb otg or charging.
Click to expand...
Click to collapse
Thanks How do I look at my usb settings?. I think I may not have the proper resistor setting as will currently provide power to usb and charge at same time for a few seconds then stops charging.. I turn resistance up it will charge , turn it down and will allow access to usb.. i think have to find that magic number inbetween.
jmxda21 said:
Thanks How do I look at my usb settings?. I think I may not have the proper resistor setting as will currently provide power to usb and charge at same time for a few seconds then stops charging.. I turn resistance up it will charge , turn it down and will allow access to usb.. i think have to find that magic number inbetween.
Click to expand...
Click to collapse
Depending on which phone and version of Android you have, the most recent versions of Android have the USB settings under Developers Options.
The USB OTG charging works differently from phone to phone. Sometimes you must plug your charger cable and the USB device you want to connect to into the OTG cable prior to plugging the OTG cable into your phone. This way the phone detects charging and device.
nastiero said:
Depending on which phone and version of Android you have, the most recent versions of Android have the USB settings under Developers Options.
The USB OTG charging works differently from phone to phone. Sometimes you must plug your charger cable and the USB device you want to connect to into the OTG cable prior to plugging the OTG cable into your phone. This way the phone detects charging and device.
Click to expand...
Click to collapse
Yes that is what I have been doing . In developer options under Usb default , no charge option there, only file transfer, USB tEThering, MID, PTP ,and o data transfer
I thanks. However i believe the default USB option is charge as thats what it is when i plug in USB to a powered cable.
. As I said jt works for A short time using USB and charging at same time with resistor between 45K and 68k
then either stops charging and continues usb or keeps charging but gives usb errrors or cant access usb but continues charging.
Fusion5 tablet android 9
Update this works fine with unmodified USB hub or charge power and USB on my LG k32 phone but not on the fusion ta blet.