Hi all,
N00B here...ya post 1, got to start some time.
I have been experimenting around with my Verizon S3 and some USB devices via a USB OTG cable (to put the S3 into USB Host mode). Common devices like mice, flash drives etc where working great and I was about to start developing some code to talk to a Silicon Labs CP210x when I got the apparently not so bright idea to plug in an Arduino Uno R3.
Instant black screen and bricked.
I tried all the common stuff (cycle battery and SIM card, hard reset via the three buttons) and it appears to likely be in JTAG land.
The Arduino happened to be running a program to write data to its USB port.
I have two random guesses -
1 - The Arduino drew to much current (it was not being powered externally) and some part failed.
2 - The Arduino caused a buffer overrun which resulted in random code execution which resulted in random phone bricking.
Anybody got any ideas what happened? I sure would like to understand it as to not to inadvertently repeat it.
Any thoughts? Anyone? Or is this just to weird?
Related
well, since this is not OS or model specific i'll place the question here.
1 colleague plugged in his HTC Desire at home and his pc crashes, and his internal mirror RAID became invalid. after the reboot (boot disk was a separate disk) he tried to connect his phone again and no problem at all!
another colleague plugged in his HTC Desire (bought a few months after the one described above) and the pc freezes (no immediate reboot) and the cooling fan from the power supply started blowing like there's 30 volts running through instead of 12. YES REALLY! i was there! after a reboot, again, no problem at all!
me, connecting my HTC HD2 to my pc and suddenly it starts rebooting. after the reboot, again, no problem at all!
immediately afterwards i tried plugging in the usb cable pressing gently in all possible directions in the usb plug. tried different usb plugs. tried with or without my phone connected on the other end. there was no way of repeating anything i wrote in this post.
so the question. does anyone recognize this?
what other phones and phone OSes give this problem?
could it be win XP? win7? vista?
anything?
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).
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
My samsung galaxy s7 (SM-G930F) that was installing LineageOS 18.1 is stuck in a bootloop and I can not get into recovery or pretty much do anything. I can however get into download mode, but the phone is not recognized by USB connection. (From what I read online a year ago, this maybe a hardware issue with some samsung s7 phones. It has not worked for a while for me and I upgrade/update using the phone's hard drive or micro-SD card.) Is there a way to install/get in recovery without a USB connection (since the USB is not recognized). The USB connection does power the device so the issue is likely with the connection and data transfer part of the USB. I have tried other cables and computers and computer ports.
Can I flash a new recovery without USB? Is there any other option? Currently, the phone goes into boot (after the logo) and then keeps on the boot/install into lineage bubble from right to left and does not finish. I don't know if this means that the bootloader is corrupted.
I can get into "Download" mode, but because I can not connect by USB, I can not install a new recovery (unless there is some other option available).
I have/had a similar issue. To the best of my knowledge, you need the USB connector.
My USB port was broken because my meathead self somehow broke the contacts on the USB connector. I'd been using wireless charging to charge it in the meantime.
Replacing the usb connector through the back (soldering a new one on) isn't too bad a feat, and you don't have to mess with the notoriously fragile display at all. Here's a youtube video example
.