Windows 7 32bit, Dell laptop.
I find my USB Bluetooth dongle stop working, I used it very rare. When I connected USB dongle, it show 'Unknown device' message, and driver not installed. In taskbar show notifications 'USB device not recognized'.
In Device Manager this USB Bluetooth dongle shown as "Unknown device". I tried right click on icon, 'Uninstall Driver Software', then Action > "Scan for hardware changes", it refreshes and show message driver installed successfully in windows taskbar. But, in Device Manager, this USB dongle still yellow "Unknown Device". When right click in icon, device status is "Windows has stopped this device because it has reported problems. (Code 43)' I tried to ininstall every item under "Universal Serial Bus controllers" menu in Device Manager, then rebooted PC, but this not help. I uninstalled all Bluetooth devices from Device Manager, include Bluetooth Radios and Network adapters:
But this not help, too. From MSDN Bluetooth FAQ I read that Windows 7 include in-box support for Bluetooth.
How to install built-in the system Bluetooth drivers in Windows 7 and enable Bluetooth? (I need only transfer files, not audio capabilities).
I find the problem: USB Bluetooth Adapter dongle is faulty. So this is hardware issue.
Related
I'm trying to connect to Sphero Sprk+ device with gobot.io, like this example: https://gobot.io/documentation/platforms/sprkplus/
The code cannot connect to the device, so I checked in the visible bluetooth devices from Bluetooth Preferences in MacBook, and Sphero isn't listed there.
Sphero is visible from android devices, and is visible from the MacBook via Sphero EDU application, but not directly from the bluetooth console.
What do I miss?
Thanks
SPRK+ communicates via BLE (Bluetooth Low Energy). BLE comes with concept of 'profiles'. There are public (documented, well-known, standard) profiles, like SPP (serial port profile), A2DP (audio profile), etc. If the device supports these profiles, you can see it in system BT preferences.
However, SPRK+ (Sphero) features it's own private communication profile, not known to Apple nor Google.
That's why the EDU application can 'see' the device, but you cannot find it in BT preferences.
I am trying to connect my sony xperia sp running on android 7.1 ( Lineage OS ) to my arduino uno using an OTG cable and the droidScript app. It worked perfectly the first time, it asked permission to open droidScript : I clicked on "OK" and checked "Use by default for this USB device".
But now I can't get it to work. When I reconnect my phone to the Uno nothing happen on my phone, droidScrip does not seem to recognize the device either and now when I try to connect my phone to my computer it does not work either ( but it's charging ).
I have tested all my cables and connected the arduino the same way using a different phone several times and it worked ( but didn't allow "Use by default for this USB device" as I suspect it comes from here ). Manually enable MTP through dev options does not work.
How can I remove that "Use by default for this USB device" option, and get the asking permission box back when I connect to my Uno ?
Try unistalling DroidScript and any other apps that might have talked to that USB device and then re-install DroidScript but don't start it up.
Plugin the OTG cable to the device (make sure you get it the right way round so that the OTG cable goes into the phone end) and then you should see the popup box for permissions.
I am developing an app that A dongle (USB) device must connect to Android OS supported device(mobile phones, tablets...) via OTG (On-The-Go) cable. The problem starts here. I need to do debug while the dongle is connected to the Mobile phone. Unfortunately, such situation makes connecting mobile phone to PC and debugging method impossible. ( Mobile phone has 1 socket but I need 2, one for connecting the dongle to mobile phone and other for connecting mobile phone to pc for debugging)
Is there a way such that the Android Studio Emulator can access to USB device on the PC?
EDIT I have found an alternative way like connecting the mobile phone to PC via Bluetooth which is explained here.
EDIT 2: A better and clear way : Installing Genymotion and Virtual Box.
Another option (I use daily) is
adb connect phone_ip
The phone should be connected to wifi (the host also).
Lots of sources for that on the net (here is one)
mordy.
I have a Late 2009 iMac which doesn't support Bluetooth 4.0 and an USB Bluetooth 4.0 dongle (CSR).
I need to write an OSX application which transfers data with a Bluetooth 4.0 device.
If I plug the dongle, the CBCentralManager returns the state CBCentralManagerStateUnsupported since OSX has loaded the driver for the internal Bluetooth device.
If I issue the following command:
sudo nvram bluetoothHostControllerSwitchBehavior="always"
the OSX loads the driver for the dongle, the CBCentralManager recognize the device but unfortunately both wireless keyboard and magic mouse stop working. Presumably because they use a previous version of Bluetooth.
Is there any way to have both internal Bluetooth and external dongle working together ?
Aside from the development, which I can manage with USB keyboard and mouse, this issue prevents older iMacs to use my app.
Thank you in advance.
...unfortunately both wireless keyboard and magic mouse stop working. Presumably because they use a previous version of Bluetooth.
This is not true. The iMac takes some time to recognize that it has not keyboard and mouse configured. After waiting some time, the iMac asks for pairing keyboard and everything work correctly with the external dongle.
I have a dual monitor setup,
1: a computer monitor connected via vga
2: a samsung lcd tv conntected via dvi->hdim cable
Until yesterday, this setup was working just fine. Today when I booted windows 7, the bios & windows loading ... screen shows up fine on my lcd tv
however, when windows loads and shows my desktop, my TV goes blank, and I only get the desktop on my computer monitor.
When I go to "screen resolution" and "detect", I only see my computer monitor listed.
As far as I know, no new display drivers were installed, I am using nvadia gt300.
Also, since the bios/welcome screen does show up on my TV, I can root out the tv/cable being faulty.
has anyone encountered something similar before ?
I had exactly the same problem. I de- and reinstalled drivers, I deinstalled the 11/18 Windows Update, I turned my monitor off and on again at least a dozen times as did I unplug and replug the HDMI cable - nothing worked.
Then, in an act of despair, I unplugged my monitor's power cable, replugged it and.... here we go again!
HTH!
Chris