I am trying to use IOBluetooth framework on OS X 10.8.2 to connect with the bluetooth enabled phones emulating computer as a hands free device. I can successfully make a connection with the phone and phone can recognise the connection as a HandsFree connected to the phone.
But when I try to make a call with the phone and want to send the audio to the mac (by selecting the source as handsfree), the audio never reaches the computer.
As at this point the bluetooth framework tries to open a SCO Audio connection with the device, but the connection establishment is never successful and I get the error code 0x0D status code in scoConnectionOpened status.
I am using IOBluetoothAddSCOAudioDevice function to attach the SCO Audio device with bluetooth device and it is always successful.
//btDevice is paired
res=IOBluetoothAddSCOAudioDevice((IOBluetoothDeviceRef) btDevice,NULL);
if(res != kIOReturnSuccess)
{
self.error.title = [NSString stringWithFormat:
#"Could not attach the Audio device. Try paring device again"];
}
The console log says
24/11/2012 4:02:13.000 PM kernel[0]: [SendHCIRequestFormatted] ###
ERROR: [0x0428] (Setup Synchronous Connection) -- Send request failed
(err = 0x000D (kBluetoothHCIErrorHostRejectedLimitedResources))
24/11/2012 4:02:13.000 PM kernel[0]: REQUIRE_NO_ERR failure: 0xd -
file:
/SourceCache/IOBluetoothFamily_kexts/IOBluetoothFamily-4090.4.33/Core/Family/Drivers/IOBluetoothSCOAudioDriver/IOBluetoothSCOAudioDevice.cpp:872
Although console log says limited resources but I have tried it with multiple phones having their batteries full.
I am stumped on this and just thinking if I need to do any thing special or different?
Thanks in advance for much appreciated help.
This error ("Connection Rejected due to Limited resource") typically happens when a T2 request is sent to a T1-only SCO listener. If you read the patch notes to version 5 you can get a discussion about this problem linux-bluetooth v5 patch notes
Related
I have a web app which uses web bluetooth api. GATT server is running on STM32 microcontroller. Web app works good on Android devices, but it keeps disconnecting on Windows 11 in a Chrome browser. I used WireShark to track BLE packets. The disconnection reason is following: "Remote user terminated connection (0x13)".
I have tested web bluetooth on the same windows device with a different GATT server running on my Android phone. In this case it worked well. What can be an issue?
The peripheral is sending a malformed GATT packet.
Packet 163, Read By Group Response, contains 156 bytes of Attribute Protocol data. It contains a list of services, each is 20 bytes, consisting of (start handle, end handle, service uuid). The list contains 7 valid entries. After that follows an entry which is truncated to 14 bytes. That entry should not be present in the list since it does not fit. So, it seems the GATT server software running on the peripheral is buggy.
The client is supposed to continue the search by sending a new Read By Group Request containing a start handle that is +1 of the last retrieved end handle.
I have a software which is on the retail machine (self check out) installed:
In the device manager, I did not receive any error like, some device is unplugged.
The functionality of the application is this:
Each device of the payment station coin recycler, note acceptor, note distributor are installed on serial ports, and USB ports, these devices send information to the application thru the ports and com:
These payment devices are installed with no issues, but after some time I found this error in event viewer (windows7) :
Microsoft.PointOfService.PosControlException: Coins device is not initialized
ErrorCode: Failure
ErrorCodeExtended: 0
and
Microsoft.PointOfService.PosControlException: Notes acceptor returned message Access to the port 'COM10' is denied.
ErrorCode: Failure
Note that in the device manager is nothing unplugged and also devices are in the normal mode, no error identified.
Can somebody please explain why, I receive the above errors, what can I improve?
I need to create a new driver to check the communication of the ports, to close and open the ports.(and if yes please advise how ).
What should I check per total to not receive these errors anymore?
thank you.
Please note that Windows version is Embedded (special for retail created)
We have device ""FT245R USB FIFO" USB to Seriel for communication from Windows 10 using D2xx driver.
FT_OpenEx() API works without any issue. But whenever user unplug/plug new USB device(Mass storage device) , during that time FT_OpenEx() API failed to execute, so handle invalid and our data communication interepted. Could you let us know what can I do further to resolve this issue ?
Note: I have opened handle using following command FT_OpenEx("FT245R USB FIFO", FT_OPEN_BY_DESCRIPTION, &handle), I open it everytime, whenever I need to talk with communication device. tried with seriel number of the device , but still communication fails when unplug/plug other USB device.
I have problem with communication via USB CDC with Windows. On Linux or Mac everything work good.
So, when I try to connect to my COM port I get notification from PUTTY "Unable to open communication to COM2. Unable to configure port.
It is my own device based on Rx63n uC, I transmit in FullSpeed standard, packet in size less than 64 bytes. I'm used 2 endpoints for bulk transfer IN/OUT.
In USBLyzer I got information thatSTALL packet is received from my device after error (USBD_STATUS_CANCELED).
I used driver from Windows 10 usbser.sys.
Any ideas what is wrong?
I forgot to add that in USBLyzer I see a lot of my packets, and after transferred some data it generate error as above.
Im trying to open a L2Cap HID Channel And Interrupt channel so I can send HID commands to a bluetooth device.
I've done all my service advertising and device paring and established a baseband connection.
The Hid Control channel opens fine.
When I try to create my kBluetoothL2CAPPSMHIDInterrupt connection
l2capChannelQueueSpaceAvailable
delegate method called (not sure what this means) followed by
l2capChannelOpenComplete
but the connection closes immediately calling
l2capChannelClosed
How can I correctly open these connection?
I've spent a long time digging through the IOBlueTooth framework and the bluetooth.org HID spec but theres barely any helpful information (that I can find at least).
When i trace out my L2Cap channels I see some null values for
mIncomingDataListener
and
mEventDataListener
. I dont know how to set these or if they have anything to do with my problem.... just speculating.
The code snippet below is my attempt so far to make the connections after a connection to the device has been established.
-(void)establishL2CappConnections:(IOBluetoothDevice*)device
{
IOReturn r;
IOBluetoothL2CAPChannel *ch1;
r = [device openL2CAPChannelSync:&ch1
withPSM:(BluetoothL2CAPPSM)kBluetoothL2CAPPSMHIDControl
delegate:self];
self.mL2CappChannel=ch1;
NSLog(#"r == %i",r);
IOBluetoothL2CAPChannel *ch2;
r = [device openL2CAPChannelSync:&ch2
withPSM:(BluetoothL2CAPPSM)kBluetoothL2CAPPSMHIDInterrupt
delegate:self];
self.mL2CappInterruptChannel=ch2;
NSLog(#"r == %i",r);
}
Edit:1
I've attached my packet logs. It's strange, a request for
kBluetoothL2CAPPSMSDP 0x0001
gets made without me requesting it and then everything starts disconnecting.
BT Packet Logs
As per your logs its very clear that your device in in Limited Connection mode, its stays Active for 30sec or less. change device settings to make it General Discoverable.
kBluetoothL2CAPPSMSDP 0x0001
means Bit 13 - Limited Discoverable Mode
Playing with the Bluetooth settings will solve your problem