site_archiver@lists.apple.com Delivered-To: bluetooth-dev@lists.apple.com Hi I am attempting to communicate with bluetooth enabled scanner device, for which i did try the following code to start communication with device using bluetooth adapter. I did receive acknowledgement when i run the same program from device but could not able to open the device file to write & read. I tried to debug and found IOBluetoothDeviceOpenConnection API gets failed. What could be the reason ? OR What should be the write approach to start communication with same ? Any pointers ? Just have a look at the snippet of code below. Thanks in advance. //==============================================================// // Serial headers #include <stdio.h> #include <string.h> #include <termios.h> #include <CoreFoundation/CoreFoundation.h> // Bluetooth #include <IOBluetooth/IOBluetoothUserLib.h> #include <IOBluetoothUI/IOBluetoothUIUserLib.h> #include <CoreServices/CoreServices.h> IOBluetoothRFCOMMChannelRef mRFCOMMChannelRef; // Hold the original termios attributes so we can reset them void rfcommEventListener (IOBluetoothRFCOMMChannelRef rfcommChannel, void *refCon, IOBluetoothRFCOMMChannelEvent *event) { } } bool StartBlueTooth() { bool returnValue = FALSE; IOBluetoothSDPServiceRecordRef serviceRecord; IOBluetoothServiceBrowserControllerRef serviceBrowser; IOReturn result; if((result == kIOReturnSuccess) && (serviceRecord != NULL) ) { UInt8 rfcommChannelID; result = IOBluetoothSDPServiceRecordGetRFCOMMChannelID(serviceRecord, &rfcommChannelID); } bool sendData(void* buffer, UInt32 length) { if ( mRFCOMMChannelRef != nil ) { UInt32 numBytesRemaining; IOReturn result; BluetoothRFCOMMMTU rfcommChannelMTU; result = kIOReturnSuccess; numBytesRemaining = length; UInt32 numBytesToSend = ( ( numBytesRemaining > rfcommChannelMTU ) ? rfcommChannelMTU : numBytesRemaining ); result = IOBluetoothRFCOMMChannelWriteSync( mRFCOMMChannelRef, buffer, numBytesToSend ); // Updates the position in the buffer: numBytesRemaining -= numBytesToSend; ((char *) buffer) += numBytesToSend; } return FALSE; } int main(int argc, char *argv[]) { #pragma unused(argc, argv) printf("Starting the application\n"); bool ret = StartBlueTooth(); if (ret != TRUE) { DLOG("Failed to start"); goto kill1; } char l_pTrigger[200]; int l_iLength; sprintf(l_pTrigger, "\x16T\x0D"); l_iLength = 3; CFRunLoopRun(); sendData((void *) l_pTrigger, l_iLength); kill1: TerminateBluetooth(); return 0; } //==============================================================// http://www.patni.com World-Wide Partnerships. 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This email sent to site_archiver@lists.apple.com void TerminateBluetooth() { if ( mRFCOMMChannelRef != NULL ) { IOBluetoothRFCOMMChannelCloseChannel( mRFCOMMChannelRef ); IOBluetoothDeviceCloseConnection( IOBluetoothRFCOMMChannelGetDevice( mRFCOMMChannelRef ) ); IOBluetoothObjectRelease( mRFCOMMChannelRef ); mRFCOMMChannelRef = NULL; } // to select a device and service. serviceBrowser = IOBluetoothServiceBrowserControllerCreate(kIOBluetoothServiceBrowserCont rollerOptionsNone ); result = IOBluetoothServiceBrowserControllerDiscover(serviceBrowser, &serviceRecord); if ( result == kIOReturnSuccess ) { IOBluetoothDeviceRef device; //NSLog( @"Service selected '%@' - RFCOMM Channel ID = %d\n", (NSString*)IOBluetoothSDPServiceRecordGetServiceName( serviceRecord ), rfcommChannelID ); // Get the device from the service record device = IOBluetoothSDPServiceRecordGetDevice( serviceRecord ); if ( ( device != NULL ) && ( IOBluetoothDeviceOpenConnection(device, NULL, NULL) == kIOReturnSuccess ) ) { // Open channel and registers our callback for RFCOMM Events: result = IOBluetoothDeviceOpenRFCOMMChannelAsync(device, &mRFCOMMChannelRef, rfcommChannelID, rfcommEventListener, NULL); printf("result = %d\n", result); if ( result == kIOReturnSuccess ) returnValue = TRUE; } } } return returnValue; rfcommChannelMTU = IOBluetoothRFCOMMChannelGetMTU( mRFCOMMChannelRef ); while ( ( result == kIOReturnSuccess ) && ( numBytesRemaining > 0 ) ) { // We are successful only if all the data was sent: if ( ( numBytesRemaining == 0 ) && ( result == kIOReturnSuccess ) ) { return TRUE; } } This e-mail message may contain proprietary, confidential or legally privileged information for the sole use of the person or entity to whom this message was originally addressed. 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