I have a big problem and I have searched thoroughly and found nothing... I'm using Android things as a central device in a system with other devices connectected. We are using the UART pins of the Raspberry Pi 3 Model B to communicate with the other devices.
When I use the default image burned with the Android Things utility and install the app through LAN connection, the app starts but it doesn't respod to any UART commands (as if nothing was being received). Note that the same code works if we burn a custom image with that app. The Raspberry also shows an error saying "bluetooth has stopped" even though I am not using the bluetooth... No error is shown in the logcat console so I don't know what is it causing it... I have tried reburning the image several times, but it doesn't work.
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I am developing a C# Windows app with feet32 library that is suppossed to initiate phone calls on a cell phone (in my case SAMSUNG S8) through bluetooth by passing ATD command. I have spent days trying to make it work. Unfortunately, I keep getting CME error message code 4 (operation not supported). I have tried different Bluetooth services including HandsFree etc. No success. What could be the reason? I am new to Bluetooth or AT commands topics and I got lost a little bit.
I am unable to attach VS2017 to my unity android app. Here's my setup.
I have adb connected via wifi.
C:\Users\Diamonds\AppData\Local\Android\sdk\platform-tools>adb devices
List of devices attached
192.168.86.20:5555 device
Unity successfully sends the build to the android phone, and logs show up when the app runs on phone:
I've got the app just running on the phone. Inside VS2017 the phone shows up correctly. When I select it, VS2017 spins for 20 seconds then does nothing. No error in VS2017 or in Unity.
Oddly I do not have the phone connected via USB. I do not know why it shows up there.
I think you can try USB instead of WIFI.
According to Microsoft's documentation
Wifi is versatile but super slow compared to USB because of latency. We saw a lack of proper multicast support for some routers or devices (Nexus series are well known for this).
using USB is a better option.
ref:
https://learn.microsoft.com/zh-cn/visualstudio/cross-platform/troubleshooting-and-known-issues-visual-studio-tools-for-unity?view=vs-2017
I recently bought an android tv box (dongle) model mk808b plus which some of you might be familiar with. What I want to do is use it for development, I want to program on it using adb, Android Studio.
The problem I am facing and its not the first of its kind, I get this with all the media boxes that I tried, they dont work as adb devices at all, I dont get any device in my device manager when I connect them on the usb (not even an unknown one). I tried reflashing the android, I put cyanogen mod on it, but to no avail, it still happens. Another thing is, if I put my device in Recovery Mode it does detect an unknown device in my control panel, but never after I boot up my android os.
Now before you say I didnt enable Developer Options Usb Debugging or I didnt put my device as MTP device, I did. I checked these and the cables im using are fine.
I dont have any problem with my Nexus 5 or S5 for the matter, just when I try these android boxes that come up with these tv like custom roms.
If you guys have any idea, I'll be happy to read, I did not find anything related to this on the internet.
PS: Why not use my Nexus 5 or S5? because the app im developing is for these boxes, so testing some of the features such as hdmi connectivity etc etc is very useful to me.
Thank you,
Andi
Unfortunately I couldn't do anything, maybe it's because of the custom ROM on it, but I did find an alternative, I'm using adb on tcp ip, it seems to work after I rooted my device, still no usb adb interface.
Is it possible to connect an Android smartphone working a host to a computer (working as a device?) I am writing an app that is supposed to remote control a camera via smartphone. I have some trouble testing my app since emulators don't support usb connections. But when I connect my smartphone to the camera I can't really tell what goes wrong. I thought of connecting the phone to a computer so that it could e.g. display the characters it is receiving but I don't really know if it would work, as computers usually work as host to other devices, not the other way around.
Thanks a lot for any tips.
You might wanna take a look here http://developer.android.com/guide/topics/usb/host.html
Altho as mention somewhere no google io mobile in android 3.1 didnt support host mode, maybe this has changed in 4.0 which might be true basing on this video http://www.youtube.com/watch?v=sQGxckZkH2g
A computer cannot act as a Device. If you want to see what is happening on your smartphone when you connect your camera, use the
adb shell dmesg commands to look at the logs and see if the camera is being detected.
Currently I'm working on a project that demands using Android and tcpdump.
A short description of what I do:
I want sniff packets using android. I have built an android application which does this using by "tcpdump".
Basically the application initiate tcpdump, which dumps the captured packet in a file (in the sdcard). Then I process the captured packets just by opening the file.
The problem :
When the wifi is in managed mode, everything works fine. But, when I put the wifi device in "ad-hoc" the wireless device stops working.
I'm using "Samsung Captivated S" (SGH - I897), and in order support "overhearing" (promiscuous mode) and ad-hoc I installed the latest "Cyanogen 7" rom ( cm_galaxysmtd_full-126.zip, from: http://download.cyanogenmod.com/?type=nightly&device=galaxysmtd)
I don't know how to solve this and I would really need your help. I suspect
that "wpa_supplicat" is to blame for that, but most probably I wrong.
Thanks in advance,
Ps: I should also mention that I start an adhoc network using my laptop. Then two android devices join the adhoc network. The android devices (SGH-I897) join the network without a problem. All the devices can ping each other.
only solution for this is described here.
http://www.44actions.com/?p=273