CBCentralManager

- (instancetype)initWithDelegate:(id<CBCentralManagerDelegate>)delegate queue:(dispatch_queue_t)queue
- (instancetype)initWithDelegate:(id<CBCentralManagerDelegate>)delegate queue:(dispatch_queue_t)queue options:(NSDictionary *)options

- (void)connectPeripheral:(CBPeripheral *)peripheral options:(NSDictionary *)options
- (void)cancelPeripheralConnection:(CBPeripheral *)peripheral

- (void)retrieveConnectedPeripherals
- (NSArray *)retrieveConnectedPeripheralsWithServices:(NSArray *)serviceUUIDs
- (void)retrievePeripherals:(NSArray *)peripheralUUIDs
- (NSArray *)retrievePeripheralsWithIdentifiers:(NSArray *)identifiers

- (void)scanForPeripheralsWithServices:(NSArray *)serviceUUIDs options:(NSDictionary *)options
- (void)stopScan

@property(readonly) CBCentralManagerState state
@property(weak, nonatomic) id< CBCentralManagerDelegate > delegate

NSString *const  CBCentralManagerOptionShowPowerAlertKey ;
NSString *const  CBCentralManagerOptionRestoreIdentifierKey;

NSString *const  CBCentralManagerScanOptionAllowDuplicatesKey ;
NSString *const  CBCentralManagerScanOptionSolicitedServiceUUIDsKey;

NSString *const  CBConnectPeripheralOptionNotifyOnConnectionKey ;
NSString *const  CBConnectPeripheralOptionNotifyOnDisconnectionKey ;
NSString *const  CBConnectPeripheralOptionNotifyOnNotificationKey;

typedef enum {
   CBCentralManagerStateUnknown  = 0,
   CBCentralManagerStateResetting ,
   CBCentralManagerStateUnsupported ,
   CBCentralManagerStateUnauthorized ,
   CBCentralManagerStatePoweredOff ,
   CBCentralManagerStatePoweredOn ,
} CBCentralManagerState;