I've recently started flying quadcopters (DJI Phantom 4 Pro & 3DR Solo). I've been using a Gen 3 iPad to display inflight video and telemetry which also augments the handheld controller. Thing is, iPad brightness is unimpressive in sunlight and there are android apps for the 3DR that are not available to iOS.
So I went to Best Buy and purchased a Samsung Galaxy Tab S2 8.0 with a fairly bright OLED display. I was operating under the deluded impression that the device would USB tether to the Phantom and 3DR controllers as seamlessly as the iPad. It didn't. Specs on the android tablet are as follows:
Device: gts28vewifi
Model: SM-T713 (T713XXU2APK6)
Build: MMB29M
OS: Samsung implementation of Marshmallow 6.0.1
On board memory: 32 GB
External SD memory: 256 GB of U3.
The first issue that I immediately noticed while attempting to connect the Samsung tablet to the Phantom Controller was the small window containing three app icons that repeatedly cycled open & closed as soon as I connected the USB cable from the Phantom controller to the T713 tablet. I started fooling around with setting USB modes (Charging, MTP, PTP, Midi, etc.) thinking that there was a mode incompatibility with the Phantom controller. Nothing seemed to work.
So I put the tablet into Developer Mode, enabled USB Debugging, and flipped the OEM lock off. I fooled a bit with trying to set a compatible mode through the Developer interface without much success. Oddly, when I plugged the iPad into the controller and verified connectivity, then unplugged it and plugged in the android tablet, the android tablet worked fine. (until I unplugged the USB cable. Reattaching the cable after detaching did not reinstate connectivity.)
After fooling around for over 4 hours without any reliable success, I decided that maybe Samsung's USB implementation on this WiFi-Only tablet was less than stellar and I should look at rooting the T713 with a build that implemented USB more effectively and reliably than Samsung's implementation (maybe Nougat?).
I'm an android virgin for all intents and purposes. I've done a fair amount of work on different flavors of Linux, OS X, iOS, and Windows over the years so I assumed that for a first timer, rooting the T713 would not be trivial. I spent several hours reading up on the protocols and tools for rooting, and specifically as it related to the T713. The signal to noise ratio of online information, especially with respect to the 713, appears to be fairly low. But I did find and use Odin (3.07) to install the TWRP 3.0.2-1 tar file according to one online article. I haven't made any further progress beyond that.
After booting into TWRP I noticed that (1) I could tether between the tablet and a Windows 10 machine and eventually get "adb devices" to return a serial number as well as reboot the T713. But I've not been able to get fastboot to connect nor have I been able to upload SuperSU to the tablet. Checking tablet's log, entries complained that the T713 couldn't mount /data and was unable to find the crypto folder. Then I read that /data needed to be formatted (after I had already tried unsuccessfully to wipe it. Okay, my bad. Can't wipe an unmounted device. I get it.) I did, however, manage to get TWRP to format /data.
Thing is, I "assumed" that /data was formatted since the terminal output didn't give any indication of anything in progress. So I think I must have rebooted the T713. The problem now is that the I've had a slowly flashing "Samsung" splash logo throbbing on screen for the past 4 hours; and I think it's looking at me funny.
I've tried to boot it into Recovery Mode and Download Mode without success. TWRP no longer loads. I'm somewhat lost at this point and would appreciate it if someone could point me in the right direction, or link me to some current material on how to either get back into Recovery Mode, or alternatively help me figure out why I am unable to re-flash the tablet.
Thanks
Related
When I first tried connecting the Skyrocket to my desktop PC, it reported that it couldn't find the drivers. After searching around, I found out about the Kies software and installed that. Initially, it wouldn't see the Skyrocket, but somehow in my testing/experimenting it suddenly saw the phone and everything was OK.
I've just connected the Skyrocket to my laptop, which of course doesn't see the storage on the phone. I've installed Kies, rebooted, and played around with it for a while, but it still can't see the phone.
Is there a basic process I should follow to get this to work, one that doesn't involve trial and error and jumping around on one foot while tapping out the Swedish national anthem in morse code with my right pinkie?
Never mind ...
I found the problem: it was the cable! I was using a different cable with my laptop than with the desktop - a thin one that came with an external battery unit for recharging. I suspect that this cable didn't support the data lines. When I switched to another cable, both drives (the main memory and the microSD card) showed up as drives under Windows. When I then went in and enabled "USB mass storage" on the phone, the contents of the phone showed up and became accessible.
Still, I don't know why Samsung doesn't make the drivers easily available without installing their Kies software.
Hi,
Apologies if this has been asked before, but I did look at the suggested related threads and many other forums.
Ultimately, I am trying to root my son's Galaxy Tab 2 7" (wifi only) but I am falling at the first hurdle. When I plug the phone via USB to the laptop it claims the USB has malfunctioned and the device cannot be recognised, however, all my USB ports work perfectly. I have also installed the latest Samsung Drivers on the laptop (running Windows 8).
When I go to the Settings menu of the tab itself, there is NO USB connection settings at all, in any sub-menu and so I can't even check if it is set up to allow transfer. I have factory wiped in the hope that some updates removed this option, as I do recall (perhaps wrongly) that I was able to connect when we first purchased the device.
Is this a common issue with the Tab 2, or is it an issue with my set-up. If already known is there a solution, or is he doomed to walk stock for all eternity?
Any help would be greatly appreciated
If I'm not mistaken you actually want download mode, not usb, in order to flash a custom recovery via Odin. I think it's power plus vol down while plugging the phone to computer (phone is off).
Sent from my GT-p511x
Hi,
I'm trying to learn about serial communication with devices from an Android tablet via USB host mode. I have a tablet, I have the devices, I have the apps... they just won't talk. It's most likely something to do with the firmware on my odd tablet, or maybe I'm just missing something stupid.
The tablet:
SUPERPAD FLYTOUCH
10.2" >24GB< ANDROID 4.0 TABLET A10 1.5Ghz CPU | 1GB RAM
"About this Tablet" says:
Model: BC1003
Android 4.04
Baseband ver 1.5rc4
Kernel 3.0.8 [email protected] #2 Mon Aug 6 15:23:31 CST 2012
There are 2 USB-A ports on this device. One has a physical switch that goes from device to host mode, comes with a male-male cable for attaching to a PC. The other port is host only. I can connect a USB thumb drive and it mounts just fine, shows up in the file manager, no problems. Same for a USB keyboard. It powers any USB device I've plugged into it.
The problem:
It works well enough for most things. But, I've now run into two applications that won't use the host USB port on the thing. Both seem to want to do basic serial communication. At this point, those 2 apps are about the only things I actually want to do with it, so I'm willing to experiment.
I have a USB oscilloscope that comes with an Android app. The app installs and runs fine, but it won't recognize the hardware usb device I've plugged in. Annoying, but I don't really need it. I've recently purchased some digital scales(DROs) for my lathe/mill. There's an Android app that interfaces these scales to an Arduino device via USB. Installs fine, won't connect to the Arduino. Okay, now this is starting to get annoying. Also, for what it's worth, the Android app for doing general Arduino stuff didn't work either.
So, the USB hardware works enough to connect a USB thumb drive or keyboard but the firmware won't use said hardware to do what I want.
The questions:
Am I doing something wrong? Is there an app I can install that enables serial communication over USB host mode? Am I missing something stupid?
Is there any other firmware I can run that will allow this communication? I think I've got the Windows utility that will allow me to flash the rom. I've watched the youtube vids on dis-assembly so I can pull the internal tf/sdcard and make a full dd backup. I'm assuming it contains the roms and everything else. Actually, I'm thinking about just pulling said card and replacing it with a smaller one for experimenting. Will I still be able to flash it using the windows LiveSuite utility even with a blank card inserted?
At this point, I'm willing to play. I mean, it's still useful enough to be careful, but I'm willing to take some chances and put a little work into it. If I can get it running with the DRO software while talking over USB to the Arduino, I'd sacrifice everything else. GPS, battery life, wifi, screen rotation, sound, whatever. I'd just bolt the thing next to the mill and that's that. Failing that, I'll put it back to stock and stick it on the fridge for my wife to look up recipes, Yeah, poor tablet... motor oil and metal swarf or cooking oil and flour. No happy retirement for this tablet, sitting in a drawer gathering dust.
Any hints, links, recommendations, or directions appreciated.
David...
Hello, I have a problem with my MK809IV stick. It seems to be a hardware problem or a feature of my device, maybe you can help me. I can't flash any rom to my stick, because when I plug it in my PC, I have a message "USB device not recognized". I tried different methods, such as pressing Reset key or making contact between 8 and 9 pads of NAND - no result. At first case I can see an Android picture on the screen (sure, if I connect it to TV), at second case nothing really happens: even CPU stay cold, no picture on sreen.
As I know, it's a problem of devices (not only MK809IV), which have PCB, marked CYX_809III V5_0 20140510.
Please, help. My device works bad, there is a low FPS in films, and I can't flash any ROM. I spent a lot of hours trying different methods and searching for information.
Same here
Ancharas said:
Hello, I have a problem with my MK809IV stick. It seems to be a hardware problem or a feature of my device, maybe you can help me. I can't flash any rom to my stick, because when I plug it in my PC, I have a message "USB device not recognized". I tried different methods, such as pressing Reset key or making contact between 8 and 9 pads of NAND - no result. At first case I can see an Android picture on the screen (sure, if I connect it to TV), at second case nothing really happens: even CPU stay cold, no picture on sreen.
As I know, it's a problem of devices (not only MK809IV), which have PCB, marked CYX_809III V5_0 20140510.
Please, help. My device works bad, there is a low FPS in films, and I can't flash any ROM. I spent a lot of hours trying different methods and searching for information.
Click to expand...
Click to collapse
I have the same device, having the same issues, and i have tried almost all what you have done so far. Really looking forward, if some one could help with this. I want to install linux on this tv stick.
Look at this thread:
w w w.freaktab.com/showthread.php?15752-CYX_809III-V5_0-20140510-%28CX-919-MK809IV-clone%29-not-connecting-to-PC-as-USB-device-for-flashing-rooting
It is almost the same device (same PCB, but sell as a "CX919"). We are able to boot on linux with an sd-card, but (up to now) I cannot make the wifi works (it is a uncommon wifi module: ESP8089).
Hi all,
A friend of my handed me his old Galaxy S6 with a broken screen. Like every typical user he had no cloud sync or back-up of his data. Normally I would tell them these lessons are hard-learned but in this case it's about important data and media of some projects in Africa he volunteered at some years ago.
This phone is a worst-case scenario. The screen is dead without backlight, the home button has been broken for some time and USB-Debugging is turned off. First thing I tried was connecting a USB-HDMI cable and OTG cable to see if we can unlock it with a conventional mouse, but sadly HDMI support was discontinued from the Galaxy S4. (Why!?)
I dismounted the phone and used an USB-Jig to force it into download mode. When connected to the computer both the MTP device and Samsung USB modem are visible. That tells me the phone still boots normally..
Connecting trough ADB did nothing, "no devices/emulators found". I also tried some commercial tools like FoneLab Android data recovery and some of the many (spyware-bundled) forks to no avail. Some detect the MTP device but off-couse need USB-Debugging to be enabled what seems to be impossible without a working screen.
Odin recognizes the phone but off course flashing the firmware will erase all data on the phone.
Replacement screens for this model are hard to get at and crazy expensive these days. Any other things I can try without risking data-loss?
Any tips are greatly appreciated!