Nathanael, what they told you is correct, you need to add to the object that calls "selectedDevice openRFCOMMChannelSync" a method called "rfcommChannelData": (void)rfcommChannelData:(IOBluetoothRFCOMMChannel*)rfcommChannel data:(void *)dataPointer length:(size_t)dataLength; because you passed "self" as delegate in openRFCOMMChannelSync the rfcomm channel will automatically call your implementation of rfcommChannelData:data:length: everytime it gets new data. ... Marco On May 24, 2004, at 7:46 AM, Nathanael P wrote: Hi everyone.. I am a student of a college in Indonesia, and I am currently doing a final task. I am a newbie in mac programming. For my final task, I want to build a bluetooth communication between my se t610 and my mac. I have built a rfcomm sync connection, but I do not how to receive the response from what I have sent. I have asked to bluetooth developer mailing list, they told me to set the callback from setdelegate: and use this function: (void)rfcommChannelData:(IOBluetoothRFCOMMChannel*)rfcommChannel data:(void *)dataPointer length:(size_t)dataLength; But I do not know how to use it both. Currently, this is what i have done: IOBluetoothDeviceSelectorController *deviceSelector; NSArray *deviceArray; deviceSelector = [IOBluetoothDeviceSelectorController deviceSelector]; [deviceSelector runModal]; deviceArray = [deviceSelector getResults]; selectedDevice = [deviceArray objectAtIndex:0]; [selectedDevice openRFCOMMChannelSync:&mRFCOMMChannel withChannelID:10 delegate:self]; [mRFCOMMChannel retain]; char *s1 = "at+cmgf=1\r"; [mRFCOMMChannel writeSync:s1 length:strlen(s1)]; char *s2 = "at+cmgl=\"all\"\r"; [mRFCOMMChannel writeSync:s2 length:strlen(s2)]; These code is learned from the example that comes along with project builder. I'd be so grateful if anyone could explain me. Thanks a lot, Nathanael __________________________________ Do you Yahoo!? Yahoo! Domains Claim yours for only $14.70/year http://smallbusiness.promotions.yahoo.com/offer _______________________________________________ bluetooth-dev mailing list | bluetooth-dev@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/bluetooth-dev Do not post admin requests to the list. They will be ignored. _______________________________________________ bluetooth-dev mailing list | bluetooth-dev@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/bluetooth-dev Do not post admin requests to the list. They will be ignored.