Hi, I have a problem concerning listening to incoming channel on the l2cap stack level with bluetooth. The way I understood the API was the following: 1-) the one that initiates the channel simply calls : [remoteDevice openL2CAPChannel:psm findExisting:FALSE newChannel:&mChannel]; when he wants to get a channel ( on a Mac computer). 2-) But the one that receives ( on another Mac) doesn't know when a call will be initiated and has to become a listener, as: // server impl -(void)receiveAny { SEL mySel = @selector(L2CAPIncomingChannelOpened:withChannel:); connectRef = [IOBluetoothL2CAPChannel registerForChannelOpenNotifications:self selector:mySel]; } -(void)L2CAPIncomingChannelOpened:(IOBluetoothUserNotification *)ref withChannel:(IOBluetoothL2CAPChannel *)newChannel { mChannel = newChannel; if(mChannel != NULL) { mIOReturn = [mChannel setDelegate:self]; [mInChannelWaitLock unlockWithCondition:CHANNEL_OPENED]; printf("channel opened"); } } Then the server registers itself as a listener of the channel for incoming data. 3-) But my problem is that the server (receiver) never gets called. In the debugger of the caller, it seems as if everything goes well. I assume that the data are sent but are lost in the server since it never gets called by the hardware or the framework functions or whatsoever. Also, it seems as if the caller gets a channel and sends the data when I check the pointers in the debugger, but in fact, the delegate methods - (void)l2capChannelOpenComplete:(IOBluetoothL2CAPChannel*)l2capChannel status:(IOReturn)error; and - (void)l2capChannelWriteComplete:(IOBluetoothL2CAPChannel*)l2capChannel refcon:(void*)refcon status:(IOReturn)error; never get called either. 4-) I tried something. I started the server side on my Mac. As explained in the API, it is supposed to listen for ANY incoming channel. Then I started a HP iPAQ equipped with Bluetooth and made a file transfer with the Bluetooth application from Apple included with my PowerBook. The transfer did very well, but my listener still never got called. It should have been, since file transfer works over RFComm over L2CAP. Any idea ( or any link to an answer)? Thanks. luc bergevin, computer programming student. _______________________________________________ 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.