簡介：

　　很早前就像總結一下手機通過藍牙連接外設的知識點，但是由于項目比較急，也沒有時間去總結。今天剛好看到一篇別人的博客，我就結合的總結了一下。

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實現的流程：

建立中心角色

掃描外設（discover）

連接外設(connect)

掃描外設中的服務和特征(discover)

? ? - 4.1 獲取外設的services

? ? - 4.2 獲取外設的Characteristics,獲取Characteristics的值，獲取Characteristics的Descriptor和Descriptor的值

5. 與外設做數據交互(explore and interact)

6. 訂閱Characteristic的通知

7.斷開連接(disconnect)

8.模擬器藍牙調試，慎用，最好還是用真機去調試。

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代碼實現：?

#import <Foundation/Foundation.h> #import <CoreBluetooth/CoreBluetooth.h>#define MyPeripheralName @"MyPeripheralName" #define MySUUID @"XXXX" #define MyCUUID @"XXXX"#define kNotificationConnected @"kNotificationConnected" #define kNotificationDisconnected @"kNotificationDisconnected"typedef enum _EN_Command_Type {EN_Command_Invalid = -1,EN_Command_Start = 0x0,EN_Command_Mode1 = 0x1,EN_Command_Mode2,EN_Command_Mode3,EN_Command_Mode4,EN_Command_Mode5,EN_Command_Mode6,EN_Command_Mode7,EN_Command_Mode8,EN_Command_Mode9,EN_Command_Stop,EN_Command_Shutdown,//關機 }EN_CommandType;@interface MSBluetoothManager : NSObject<CBCentralManagerDelegate,CBPeripheralDelegate>@property (nonatomic,assign)BOOL bluetoothPowerOn;/*** 單例方法** @return 單例*/ +(MSBluetoothManager*)shareInstance;/*** 開始掃描*/ -(void)startScan;/*** 停止掃描*/ -(void)stopScan;/*** 連接*/ -(void)startconnect;/*** 取消連接*/ -(void)cancelConnect;/*** 向設備寫數據*/ -(BOOL)writeData:(NSData*)data;/*** 是否可以準備好寫數據** @return 是否可以準備好寫數據*/ -(BOOL)isReady;/*** 發送命令** @param command 命令內容** @return 是否發送成功*/ -(BOOL)sendCommand:(EN_CommandType)command;@end View Code

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由于代理方法比較多，我就不一一做介紹 了

#import "MSBluetoothManager.h" #import "TKAlertCenter.h" #define SCACN_INTERVALS 1.5@interface MSBluetoothManager() @property BOOL cbReady; @property (nonatomic,strong) CBCentralManager *cbCM; @property (strong,nonatomic) NSMutableArray *nDevices; @property (strong,nonatomic) NSMutableArray *nServices; @property (strong,nonatomic) NSMutableArray *nCharacteristics;@property (strong,nonatomic) CBPeripheral *cbPeripheral; @property (strong,nonatomic) CBService *cbServices; @property (strong,nonatomic) CBCharacteristic *cbCharacteristcs;@end@implementation MSBluetoothManager+(MSBluetoothManager*)shareInstance {static dispatch_once_t pred = 0;__strong static MSBluetoothManager *_sharedObject = nil;dispatch_once(&pred, ^{_sharedObject = [[self alloc] init]; // or some other init method });return _sharedObject; }#pragma mark -對外接口 /*** 開始掃描*/ -(void)startScan {if(_bluetoothPowerOn){if( !_cbReady ){[self updateLog:@"Scan for Peripheral..."];[_cbCM scanForPeripheralsWithServices:nil options:nil];// [self performSelector:@selector(startScan) withObject:nil afterDelay:SCACN_INTERVALS]; }}else{//彈框提示，請去系統中打開藍牙[[TKAlertCenter defaultCenter]postAlertWithMessage:NSLocalizedString(@"Please open the Bluetooth on system settings", @"請到系統設置中打開藍牙")];}}/*** 停止掃描*/ -(void)stopScan {[self updateLog:@"stop scan..."];[_cbCM stopScan];[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(startScan) object:nil]; }/*** 連接*/ -(void)startconnect {if (_cbReady ==false){[self.cbCM connectPeripheral:_cbPeripheral options:nil];} }/*** 取消連接*/ -(void)cancelConnect {if(_cbReady){[_cbCM cancelPeripheralConnection:_cbPeripheral];}}/*** 向設備寫數據*/ -(BOOL)writeData:(NSData*)data {BOOL ret = NO;if([data length] >0){[self writeCharacteristic:_cbPeripheral sUUID:MySUUID cUUID:MyCUUID data:data];ret = YES;}return ret; }/*** 是否可以準備好寫數據** @return 是否可以準備好寫數據*/ -(BOOL)isReady {return _cbReady; }/*** 發送命令** @param command 命令內容** @return 是否發送成功*/ -(BOOL)sendCommand:(EN_CommandType)command {NSLog(@"begin send command:%d",command);BOOL ret = NO;if([self isReady]){unsigned char data [6]= {0};data[0] = 0xa5;*(data+1) = 0x01;*(data+2) = 0x01;switch (command) {case EN_Command_Start:{}break;case EN_Command_Stop:{command = 0x00;}break;case EN_Command_Mode1:break;case EN_Command_Mode2:break;case EN_Command_Mode3:break;case EN_Command_Mode4:case EN_Command_Mode5:case EN_Command_Mode6:case EN_Command_Mode7:case EN_Command_Mode8:case EN_Command_Mode9:{ // datastr = [NSString stringWithFormat:@"%d",command]; }break;case EN_Command_Shutdown:{command = 0x5a;}default:break;}NSLog(@"send command:%d",command);*(data+3) = command;// datastr = @"1234567890";// NSNumber* num = @(0x01);// NSData* data = [datastr dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; do_crc(data,6);// char a[10]= {0x2,0x2,0x2,0x2,0x2,0x2,0x2,0x2,0x2,0x2};NSData *nsdata = [NSData dataWithBytes:data length: sizeof(char)*6];NSLog(@"send data: %@",nsdata);//真正發送命令ret = [self writeData:nsdata];}return ret; }#pragma mark -CBCentralManagerDelegate - (void)centralManagerDidUpdateState:(CBCentralManager *)central {switch (central.state) {case CBCentralManagerStatePoweredOff:[self updateLog:@"CoreBluetooth BLE hardware is Powered off"];//對外拋出斷開連接的通知[[NSNotificationCenter defaultCenter] postNotificationName:kNotificationDisconnected object:nil];_cbReady = FALSE;_bluetoothPowerOn = FALSE;break;case CBCentralManagerStatePoweredOn:[self updateLog:@"CoreBluetooth BLE hardware is Powered on and ready"];_bluetoothPowerOn = YES;break;//cbReady = true;case CBCentralManagerStateResetting: // _cbReady = FALSE;[self updateLog:@"CoreBluetooth BLE hardware is resetting"];break;case CBCentralManagerStateUnauthorized:[self updateLog:@"CoreBluetooth BLE state is unauthorized"]; // _cbReady = FALSE;break;case CBCentralManagerStateUnknown:[self updateLog:@"CoreBluetooth BLE state is unknown"];break;case CBCentralManagerStateUnsupported: // _cbReady = FALSE;[self updateLog:@"CoreBluetooth BLE hardware is unsupported on this platform"];break;default:break;} }//已發現從機設備 - (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI {[self updateLog:[NSString stringWithFormat:@"Did discover peripheral. peripheral: %@ rssi: %@, UUID: %@ advertisementData: %@ ", peripheral, RSSI, peripheral.identifier, advertisementData]];BOOL replace = NO;// Match if we have this device from beforefor (int ii=0; ii < _nDevices.count; ii++) {CBPeripheral *p = [_nDevices objectAtIndex:ii];if ([p isEqual:peripheral]) {[_nDevices replaceObjectAtIndex:ii withObject:peripheral];replace = YES;}}if (!replace) {if ([peripheral.name isEqualToString:MyPeripheralName]) {[_nDevices addObject:peripheral];[self updateLog:@"has found MyPeripheralName！\r\n"];_cbPeripheral = peripheral;}}if(_cbPeripheral ){//開始連接 [self startconnect];} }//已鏈接到從機 - (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral {//取消重連[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(startScan) object:nil];[self updateLog:[NSString stringWithFormat:@"Connection successfull to peripheral: %@ with UUID: %@",peripheral,peripheral.identifier]];//Do somenthing after successfull connection.//發現services//設置peripheral的delegate未self非常重要，否則，didDiscoverServices無法回調peripheral.delegate = self;[_cbPeripheral discoverServices:nil];_cbReady = true;[self updateLog:@"didConnectPeripheral"];//對外拋出連接的通知[[NSNotificationCenter defaultCenter] postNotificationName:kNotificationConnected object:nil];//統計[AVAnalytics event:@"ConnectToHardWare"];}//已斷開從機的鏈接 - (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error {[self updateLog:[NSString stringWithFormat:@"Disconnected from peripheral: %@ with UUID: %@",peripheral,peripheral.identifier]];//Do something when a peripheral is disconnected._cbReady = false;//對外拋出斷開連接的通知[[NSNotificationCenter defaultCenter] postNotificationName:kNotificationDisconnected object:nil];//統計[AVAnalytics event:@"DisconnectToHardWare"];//嘗試重連dispatch_async(dispatch_get_main_queue(), ^{[self startScan];}); }- (void) centralManager:(CBCentralManager *)central didRetrieveConnectedPeripherals:(NSArray *)peripherals {[self updateLog:[NSString stringWithFormat:@"Currently connected peripherals :"]];int i = 0;for(CBPeripheral *peripheral in peripherals) {[self updateLog:[NSString stringWithFormat:@"[%d] - peripheral : %@ with UUID : %@",i,peripheral,peripheral.identifier]];i++;//Do something on each connected peripheral. }}- (void) centralManager:(CBCentralManager *)central didRetrievePeripherals:(NSArray *)peripherals {[self updateLog:[NSString stringWithFormat:@"Currently known peripherals :"]];int i = 0;for(CBPeripheral *peripheral in peripherals) {[self updateLog:[NSString stringWithFormat:@"[%d] - peripheral : %@ with UUID : %@",i,peripheral,peripheral.identifier]];i++;//Do something on each known peripheral. } }//delegate of CBPeripheral //已搜索到services -(void) peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{[self updateLog:@"Found Services."];int i=0;for (CBService *s in peripheral.services) {[self.nServices addObject:s];}for (CBService *s in peripheral.services) {[self updateLog:[NSString stringWithFormat:@"%d :Service UUID: %@(%@)",i,s.UUID.data,s.UUID]];i++;[peripheral discoverCharacteristics:nil forService:s];} }#pragma mark -CBPeripheralDelegate // ////已讀到char //-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{ // if (error) { // return; // } // unsigned char data[characteristic.value.length]; // [characteristic.value getBytes:&data]; // // //}//已搜索到Characteristics -(void) peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error{[self updateLog:[NSString stringWithFormat:@"Found Characteristics in Service:%@ (%@)",service.UUID.data ,service.UUID]];for (CBCharacteristic *c in service.characteristics) {[self updateLog:[NSString stringWithFormat:@"Characteristic UUID: %@ (%@)",c.UUID.data,c.UUID]];[_nCharacteristics addObject:c];} }//已讀到char -(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{if (error) {return;}unsigned char data[characteristic.value.length];[characteristic.value getBytes:&data];NSDate*date = [NSDate date];NSCalendar*calendar = [NSCalendar currentCalendar];NSDateComponents*comps;comps =[calendar components:(NSHourCalendarUnit | NSMinuteCalendarUnit |NSSecondCalendarUnit) fromDate:date];NSInteger hour = [comps hour];NSInteger minute = [comps minute];NSInteger second = [comps second];[self updateLog:[NSString stringWithFormat:@"char update! [%ld:%ld:%ld],char = %d",hour,minute,second,data[0]]]; }#pragma mark -內部函數 -(id)init {if(self = [super init]){_cbCM = [[CBCentralManager alloc] initWithDelegate:self queue:nil];_cbServices =[[CBService alloc]init];_cbCharacteristcs =[[CBCharacteristic alloc]init];//列表初始化_nDevices = [[NSMutableArray alloc]init];_nServices = [[NSMutableArray alloc]init];_nCharacteristics = [[NSMutableArray alloc]init];_cbReady = FALSE;_bluetoothPowerOn = FALSE;}return self; }-(void)updateLog:(NSString *)s {//用回NSLog，NSLog(@"%@",s ); }-(void)writeCharacteristic:(CBPeripheral *)peripheral sUUID:(NSString *)sUUID cUUID:(NSString *)cUUID data:(NSData *)data {// Sends data to BLE peripheral to process HID and send EHIF command to PCfor ( CBService *service in peripheral.services ) {if ([service.UUID isEqual:[CBUUID UUIDWithString:sUUID]]) {for ( CBCharacteristic *characteristic in service.characteristics ) {if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:cUUID]]) {[self updateLog:@"has reached\r\n"];/* EVERYTHING IS FOUND, WRITE characteristic ! */[peripheral writeValue:data forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse];}}}} }-(void)setNotificationForCharacteristic:(CBPeripheral *)peripheral sUUID:(NSString *)sUUID cUUID:(NSString *)cUUID enable:(BOOL)enable {for ( CBService *service in peripheral.services ) {if ([service.UUID isEqual:[CBUUID UUIDWithString:sUUID]]) {for (CBCharacteristic *characteristic in service.characteristics ) {if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:cUUID]]){/* Everything is found, set notification ! */[peripheral setNotifyValue:enable forCharacteristic:characteristic];}}}} }- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{[self updateLog:[NSString stringWithFormat:@"%@",error]];}void do_crc(unsigned char *data,unsigned short int length) {//此處為加密算法，略去 }@end View Code

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轉載于:https://www.cnblogs.com/HJQ2016/p/5790347.html

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