The scanner is bluetooth connected to the android device.
Scanner loses connection after some time (approx. 2 days). When trying to reconnect, it connects to the device for a while and loses it again. I tried to update the android system, reset to factory settings.
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i have some questions for ble conneciton between smartphone with bluetooth earphone.
after pairing/bonding the bluetooth earphone, when i turn on bluetooth earphone, my smartphone automatically connect to the bluetooth earphone.
how it can be? the smartphone periodically try to connect (send connect request packet) to paired devices?
i don't think that job includes advertising/scan because the connection has completed so quickly right after bluetooth earphone turn on.
maybe.. i think the smartphone periodically try to connect to paired devices..
is it right?
I have datalogic qd2131 hand scanner, want to use with java pos
after scanning the interface usb-oem the scanner dies
please help in enabling the scanner
It was a long time ago in a galaxy far far away ....
but disconnect device, hold 5 sec trigger, connect device. Release trigger. Some seconds it will be flashing. Then reconnect device.
I am trying to debug a memory leak on a Android based VOIP desk phone with Android Studio 2.1 (For what it's worth it's a Grandstream GXV3275 phone, which has a 7in Android tablet embedded in it).
As best I can tell this device has no direct USB connection. I've enabled "Developer Mode" on the phone and am able to connect to it using "adb connect" from the command line. I can use Android Studio to then download and run/debug applications over the network.
But Android Device Monitor will not connect to the device and the phone does not show up in Device Monitor's list of devices. In the Device Monitor's console i see:
[2016-08-30 15:17:32 - DeviceMonitor] Adb connection Error:EOF
[2016-08-30 15:17:32 - DeviceMonitor] Connection attempts: 1
[2016-08-30 15:17:33 - DeviceMonitor] Connection attempts: 2
[2016-08-30 15:17:34 - DeviceMonitor] Connection attempts: 3
Any ideas how to make Device Monitor recognize devices over the network?
Well, the alternative is to use the Android Monitor tab built into Android Studio. This does indeed seem to work without a direct usb tether. Android Monitor supports initiating GC and performing heap dumps (HPROF). The downside that I have seen, is that performing an HPROF dump temporarily disconnects my ethernet connected Android desktop phone from the network.
I am working on an application (windows phone 8.1), which is the following: if my phone is already connected to a bluetooth device then it should connect in parralel to another device which is already paired("cc2541"). I would appreciate a little help with the coding.
My problem is i don't know how to connect to a device automatically. I only found code samples that are only scans and lists devices and it only connects when I touch the screen ( approve the connectivity ).
You can get the RSSI value (signal strength) for each device, then you can implement a dispatcherTimer, where you start the scanning as the timer starts and then connect to the closest device on a timeout.
This is a basic example of automatic connection establishment.
my problem is the connection with a Bluetooth device. I have a Netbook with an integrated bluetooth device. I want to connect my netbook with an OBD-II interface and write a software to read out the stats of my car. To test the connection, I started by adding the OBD device via the bluetooth menu. The manager connects to the interface and it wants me to wait while the configurations are taking place. This state lasts "forever". After 60-Minutes of waiting, I closed the window. However, the device is shown in the list of available devices. Because I'm not able to switch the button to initiate the connection, I thought about using minicom (the OBD-II interface uses SPP for communicating).
As far as I did understand, I need an initiated connection with a bluetooth device and with it a virtual serial port to connect to with minicom. After reading some postings, I found out that the hcitool should be able to create the bluetooth session. With this I was able to connect to the device and the "connected" button turned on. Unfortunately it switches back after 2 secs.
hcitool scan is able to find the device
hcitool cc 00:11:22:33:44:55 is able to connect for the already mentioned 2 secs
hcitool con list the connection if it's called within 2 sec after initiating
I also tried to connect via a Windows PC using putty. Windows connected with the device without a problem and after that, I was able to send requests and get the appropriate answers. So it seems like the interface is working correctly.
I'm using Fedora 17 with gnome3. If you need any output or more information, please let me know.
Thanks in advance