IOS蓝牙开发版本限制蓝牙2.0 === 越狱设备蓝牙4.0 === iOS 6 以上MFI认证设备（Make For ipod/ipad/iphone） === 无限制
ios连接外设的代码实现流程
1、建立中心角色#import <CoreBluetooth/CoreBluetooth.h>CBCentralManager *manager;manager = [[CBCentralManager alloc] initWithDelegate:selfqueue:nil];
2、扫描外设（discover）[manager scanForPeripheralsWithServices:nil options:options];
3、连接外设(connect)(void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary*)advertisementData RSSI:(NSNumber*)RSSI{if([peripheral.name isEqualToString:BLE_SERVICE_NAME]){[selfconnect:peripheral];}s);}(BOOL)connect:(CBPeripheral *)peripheral{self.manager.delegate =self;[self.manager connectPeripheral:peripheraloptions:[NSDictionarydictionaryWithObject:[NSNumbernumberWithBool:YES] forKey:CBConnectPeripheralOptionNotifyOnDisconnectionKey]];}
4、扫描外设中的服务和特征(discover)(void)centralManager:(C幞洼踉残BCentralManager *)centr锾攒揉敫al didConnectPeripheral:(CBPeripheral *)peripheral{NSLog(@"Did connect to peripheral: %@", peripheral);_testPeripheral = peripheral;[peripheral setDelegate:self]; <br>//查找服务[peripheral discoverServices:nil];}(void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError*)error{NSLog(@"didDiscoverServices");if(error){NSLog(@"Discovered services for %@ with error: %@", peripheral.name, [error localizedDescription]);if([self.delegate respondsToSelector:@selector(DidNotifyFailConnectService:withPeripheral:error:)])[self.delegate DidNotifyFailConnectService:nilwithPeripheral:nilerror:nil];return;}for(CBService *service in peripheral.services){//发现服务if([service.UUID isEqual:[CBUUID UUIDWithString:UUIDSTR_ISSC_PROPRIETARY_SERVICE]]){NSLog(@"Service found with UUID: %@", service.UUID); <br>//查找特征[peripheral discoverCharacteristics:nilforService:service];break;}}}(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError*)error{if(error){NSLog(@"Discovered characteristics for %@ with error: %@", service.UUID, [error localizedDescription]);[selferror];return;}NSLog(@"服务：%@",service.UUID);for(CBCharacteristic *characteristic in service.characteristics){//发现特征if([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"xxxxxxx"]]) {NSLog(@"监听：%@",characteristic);<br>//监听特征[self.peripheral setNotifyValue:YESforCharacteristic:characteristic];}}}
5、与外设做数据交互(读 与 写) 读(void)peripheral:(CBPeripheral *像粜杵泳)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError*)error{if(error){NSLog(@"Error updating value for characteristic %@ error: %@", characteristic.UUID, [error localizedDescription]);self.error_b = BluetoothError_System;[selferror];return;}// NSLog(@"收到的数据：%@",characteristic.value);[selfdecodeData:characteristic.value];}写NSData*d2 = [[PBABluetoothDecode sharedManager] HexStringToNSData:@"0x02"];[self.peripheral writeValue:d2 forCharacteristic:characteristic type:CBCharacteristicWriteWithoutResponse];