Tablet Coby Kyros 7034 disconnected from WiFi

[jcohedman]

When I run UsbSerialDemo with B4A-Bridge, the tablet is disconnected from wi fi.
Can anybody help me?

 

[Erel]

Does it only happen with this specific example?

 

[jcohedman]

I don't know, not test in another. Sorry for my english...

 

[Erel]

Are you running multiple instances of Basic4android?

If not then the disconnections are usually related to network disconnections.

 

[agraham]

It's possible that the WiFi controller is connected internally by USB. I seem to remember another post where a user said his app could see a Ralink device which I would assume to be his WiFi controller. I would have thought that Android shouldn't expose such internal devices to an app but it seemed to in his case.

If this is the case, and it is the first device in the device list, then I can see potential problems as, for simplicity, UsbSerial assumes that the first device it sees is the one of interest. This is true in almost all cases and making the assumption avoids some messy complications in coding for a situation that will seldom arise.

 

[jcohedman]

This is the tablet screen when I press Start, and it closes the wifi:

Device Information

DeviceName: /dev/bus/usb/001/002
DeviceClass: USB_CLASS_PER_INTERFACE(per-interface basis)
DeviceSubClass:0
DeviceID: 0x3EA
ProductId:0x8176
VendorId:0xBDA

B4aInterfaceNumber:0
InterfaceClass:USB_CLASS_VENDOR_SPEC(vendor specific)
InterfaceSubClass:255
InterfaceProtocol:255

EndpointNumber:1
EndpointDirection:In
EndpointType:USB_ENDPOINT_XFER_BULK(bulk)
EndpointAttribute:2
EndpointInterval:0
EndpointMaxPacketSize:512

EndpointNumber:2
EndpointDirectionut
EndpointType:USB_ENDPOINT_XFER_BULK(bulk)
EndpointAttribute:2
EndpointInterval:0
EndpointMaxPacketSize:512

EndpointNumber:3
EndpointDirectionut
EndpointType:USB_ENDPOINT_XFER_BULK(bulk)
EndpointAttribute:2
EndpointInterval:0
EndpointMaxPacketSize:512

EndpointNumber:4
EndpointDirection:in
EndpointType:USB_ENDPOINT_XFER_INT(interrupt)
EndpointAttribute:3
EndpointInterval:1
EndpointMaxPacketSize:64

 

[jcohedman]

If I run the app in the tablet then connect it to the wifi and connect B4Android from the pc, I got log data...

 

[agraham]

Those are the IDs for a Realtek 8192cu WiFi USB adaptor. Android really shouldn't be exposing that to your app. You won't be able to use UsbSerial on that device.

 

[jcohedman]

Thank You, Agraham!

I'll try on another tablet.

 

[jcohedman]

With an Acer A 500 it's ok!