In theory (ignoring drivers) could one connect a USB keyboard to an XDA2??
Dont think so, xda device is usb slave, usb keyboard is slave so they cant talk to each other. Usb uses master/slave protocol, a slave device can only communicate with a master.
Related
Is it possible to use a usb device without a dock using the usb cord that comes with the tf201?
Nope, but you can get one of these.
Does it have full USB functions (keyboard connectivity and USB storage connectivity) ?
I have that and although I have not connected a keyboard I have gotten it to work wit a ps3 controller and a memmory card reader.
Sent from my PG86100 using XDA
stefankorun said:
Does it have full USB functions (keyboard connectivity and USB storage connectivity) ?
Click to expand...
Click to collapse
I have used a thumbdrive, harddrive, usb receiver for logitec mouse and keyboard, usb wifi adapter (had to the compile drivers)... I imagine anything with a proper driver would work..
Hi all, I have a MK809III tv stick with Android 4.4.2 running. I use it as a mini PC with a LCD screen. I have attached to its USB OTG ports a quadrate 2.0 4 ports USB HUB (google for this and you can see it) , and connected to it, a PS/2 keyboard (using an usbtoPs2 adapter), an usb mouse, a usb ethernet dongle, and a usb sound card dongle. When I use this combo, all works fine, the mouse can drag and select, also wheel works, the keyboard works fine, the ethernet run smooth, and the sound works as player and mic recorder, the only thing not works is to reboot the tv stick, and launch android again (with other MK89III tv stick this also works flawlessly), to get this, I must to unplug RJ45 or usb ethernet. But this last question is not my main problem. The main problem is that I can not make the combo work anyway if I change usb hub model, If I use a 2.0 usb square hub (no name brand) with a little blue led installed, all works fine, but using other hub (I have tested two others), thare is no way to work. The main situation is that the hub stops work, and all item connected not works at all. But commonly, mouse works with a bad behaviour in button response, usb sound disconnects suddenly, or usb ethernet lagg or not works at all. My question is about this behaviour with usb hubs, if there is a special requirements in hardware to match an usb hub with this kind of android devices, or if thare are some drivers that can solve this.
Thank in advance.
Solved
I have solved the two main problems in order to use my MK809III RK3188 as a mini pc with usb hub and rj45 ethernet. The hub must to be a chip on board one, no an all-in-one glued ultra-cheap type, this is a mark of better quality and response, then you can conect keyboard/mouse, usb or ps2 with usb converters, usb sound, and usb pendrives. The ethernet must be an ASIX AX88772C, this a true usb ethernet 100mbps (7MB/s real) device, since I use it there is no lag, no boot errors, no delays or shorts in Tx/Rx. That´s all.
I bought a Rapoo e6500 portable bluetooth keyboard
https://www.youtube.com/watch?v=mvim6Gh4hR0
It works perfectly in wireless with either my Android tablet or with my desktop computer
However, it also has a mini USB port (for recharging)
But if I switch BT off and connect it via USB it does not get recognized at all
How come?
Could it be that the USB connection carries only charge and no data?
If I connect it to a linux running computer and give the command lsusb the keyboard does not show up....
Android doesn't work like that. Only charging and mtp protocols are the only ones.
Hi!
Please, give me advice how to find out problem root with some USB devices that can't be detected/used with my android device.
There is device like car rear view mirror with android. Phisung E06 or any of exactly same devices under different Chinese brands. Every device have touchscreen, front view camera, rear view USB (!) camera, one SIM card LTE, GPS and mini USB connector. Rear view camera connector is 2,5 mm mini jack instead of regular USB connector. miniUSB connector is for power supply and for firmware update from PC. These devices are based on MTK MT6735 chip that have only one USB port (as you see there is two USB connectors and only one phisical USB port) and 2 . Android is 5.1 Lollipop. Кernel version is 3.10.65+
I run dmesg in android console and found following. miniUSB port is connected to MT6735 regular USB port whereas USB camera is connected to inter chip USB port that normally used to work with second SIM card. I soldered DIY 2,5 mm mini jack to USB female adapter and tested it. With USB active hub with external power supply and my DIY adapter I successfully connected and used rear view camera, keyboard and mouse . They are work well. However USB card reader and U-BLOX USB GPS reciever are not detected by android. So I used USB Device Info app to check how my devices are detected by kernel USB subsystem. I was able connect hub to hub to hub and plug my devices to any port of them.
-USB Device Info app on the kernel tab view always give correct HUB hierarchy and point of connection hub/port of camera/mouse/keyboard and it's detailed info (vendor, name, etc.).
-USB card reader is shown too connected but none of my SD card recognized. No info in USB Device. No SD Card files in any of subfolder of /storage folder.
-U-BLOX USB GPS reciever was not detected at all. It's power indicator is lit still. GNSS Commander can't use reciever showing it's offline status. (P.S. Reciver is OK. It is used with PC and OTG port of my android 5 tablet)
The question are:
- why SD card is not detected in card reader
- why U-BLOX USB GPS reciever is not detected at all
I expect both of them are requre data to be recieved from host to control usb peripherial device. Unlike, for example, camera or mouse who do not require any data from host.
Please, advice me what log I need to check, what special apps I need to run, what adb and console commands can help me.
Thank you
preloader
could you plz send me the Preloader because I f*ck up my system and format the whole system :S
Hi,
I want to control my Motorola Moto Z Play over USB Debugging with my Notebook. The Problem is that I must confirm that the Notebook is trustable, but my Touchscreen doesn't function. So I must confirm it with a keyobard or mouse after I connect it with the Notebook.
I testet a USB Hub: Smartphone -> OTG Adapter -> USB Hub -> Notebook (usb male to male cable) + Keyboard.
The Keyboard has functioned and my phone was charging, but the confirm button doesnt come. I also couldn't see the phone as an adb device.
Can I solve this Problem or do I have to buy a new screen?
Best regards
motozmod
And what exactly is your laptop?