Since you correctly registered yourself as delegate of the channel you should implement: - (void)rfcommChannelData:(IOBluetoothRFCOMMChannel*)rfcommChannel data:(void *)dataPointer length:(size_t)dataLength; to receive data. There are more delegate methods you may need, the full list of delegate methods for an RFCOMM channel are toward the end of IOBluetoothRFCOMMChannel.h ... Marco On Apr 12, 2004, at 10:46 PM, Nathanael P wrote: I want to enter at commands to mobile phone using bluetooth. I wrote the program on xcode. I have opened a rfcomm channel synchronously: [selectedDevice openRFCOMMChannelSync:&mRFCOMMChannel withChannelID:10 delegate:self]; [mRFCOMMChannel retain]; I have a problem: I've tried to enter the at commands using writeSync, but there's no response. I have no idea how to read the incoming data from the mobile phone. How to write the at commands and read the incoming data? __________________________________ Do you Yahoo!? Yahoo! Small Business $15K Web Design Giveaway http://promotions.yahoo.com/design_giveaway/ _______________________________________________ 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.