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POiOS Bluetooth retrievePeripherals causes EXC_BAD_ACCESS crash
 

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  1. POiOS Bluetooth retrievePeripherals causes EXC_BAD_ACCESS crash
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    <p>I need to periodically reconnect to a peripheral, but trying to re-connect crashes.</p> <p>First, my central scans for peripherals' UUID, then it connects, then it stores the peripheral.UUID into a CFUUIDRef variable, and then disconnects. Next, to re-connect it retrieves the UUID from variable, then either crashes with "EXC_BAD_ACCESS" when it does retreivePeripherals, or a little later when it does the subsequent didRetrievePeripherals.</p> <p>Maybe I'm not storing the UUID correctly, but I don't see the bug. Thanks.</p> <p>Here's the code ..........</p> <pre><code>-(void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral { /////////////////////// C E N T R A L C O N N E C T E D P E R I P H E R A L ////////////////////// [self.centralManager stopScan]; // Make sure we get the discovery callbacks peripheral.delegate = pwr_tx_management; switch( PWR_TX_manager.present_operation ) { case POLLING_FOR_GENERIC_DVINEWAVE_DEVICE: if( dbg_ev ) printf("1"); // Add new record for connection device to local system status database: update_device_record( &amp;packed_ad_record ); // ==&gt; device_record_index // Store peripheral UUID for later, perioed re-connection for polling: area_device_status[ device_area ][ device_record_index ].peripheral_UUID = peripheral.UUID; // uses declaration: CFUUIDRef peripheral_UUID; // Disconnect: !!! [self.centralManager cancelPeripheralConnection: peripheral]; break; case OPERATION_SPECIFIC_POLLING: NSLog( @"(7) didConnectPeripheral " ); if( dbg_ev ) printf("2"); // Proceed with reading device's status and updating local database: [peripheral discoverServices:nil]; // request service, characteristics, then request device send its packed status record break; default: break; } } // Connects to device specificed by index next_dbase_record . void connect_specific_device( void ) { NSLog( @"(5) connect_specific_device - next_dbase_record = %d", next_dbase_record ); CFUUIDRef uuid = area_device_status[ device_area ][ next_dbase_record ].peripheral_UUID; if( uuid ) { // Request call to didRetrievePeripherals() with CBPeripheral: [pwr_tx_management.centralManager retrievePeripherals:[NSArray arrayWithObject: (id)CFBridgingRelease(uuid)]]; &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; crashes here with: Thread 1: EXC_BAD_ACCESS } else { NSLog( @" - missing area_device_status[][].peripheral_UUID "); } } // Iniates connection to peripheral device specified before by retrievePeripherals. - (void) centralManager:(CBCentralManager *)central didRetrievePeripherals:(CBPeripheral *)peripheral { NSLog( @"(6) didRetrievePeripherals"); [central connectPeripheral:peripheral options:nil]; } </code></pre>
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