iO蓝牙开发 - BLE(蓝牙4.0)

来源：互联网发布：淘宝直播可以用电脑吗编辑：程序博客网时间：2024/05/21 17:34

设备:

中心设备(CBCentralManager):iOS系统的手机等设备
外围设备(CBPeripheral):手环等第三方设备

外围设备:

服务: 外围设备下的子信息, 每个服务有一个UUID标示.
特征:服务下的子信息, 每个特征也有一个UUID标示.特征是外围设备的最小单位,每一个特征信息代表设备的一个信息或者数据, 以手环为例, 每一个特征可能代表手环记录的步数或者电量等信息.

实现步骤:

创建中心设备(CBCentralManager)
中心设备开始扫描(scanForPeripherals)
扫描到外围设备之后, 自动调用中心设备的代理方法(didDiscoverPeripheral)
如果设备过多, 可以将扫描到的外围设备添加到数组
开始连接, 从数组中过滤出自己想要的设备, 进行连接(connectPeripheral)
连接上之后, 自动调用中心设备的代理方法(didConnectPeripheral), 在代理中, 进行查找外围设备的服务(peripheral.discoverServices)
查找到服务之后, 自动调用外围设备的代理(didDiscoverServices), 可通过UUID,查找具体的服务,查找服务(discoverCharacteristics)
查找到特征之后, 自动调用外围设备的代理(didDiscoverCharacteristics), 通过UUID找到自己想要的特征, 读取特征(readValueForCharacteristic)
读取到特征之后, 自动调用外设的代理方法(didUpdateValueForCharacteristic),在这里打印或者解析自己想要的特征值.

代码:

#import "ViewController.h"#import <CoreBluetooth/CoreBluetooth.h>//4个字节Bytes 转 intunsigned int  TCcbytesValueToInt(Byte *bytesValue) {    unsigned int  intV;    intV = (unsigned int ) ( ((bytesValue[3] & 0xff)<<24)                            |((bytesValue[2] & 0xff)<<16)                            |((bytesValue[1] & 0xff)<<8)                            |(bytesValue[0] & 0xff));    return intV;}@interface ViewController () <CBCentralManagerDelegate, CBPeripheralDelegate>// 扫描设备- (IBAction)scanPeripheral:(id)sender;// 连接蓝牙- (IBAction)startConnect:(id)sender;// 断开蓝牙- (IBAction)disConnect:(id)sender;// 开始震动- (IBAction)startShake:(id)sender;// 停止震动- (IBAction)stopShake:(id)sender;@property (weak, nonatomic) IBOutlet UILabel *label;// 中心设备@property (nonatomic, strong) CBCentralManager *manager;// 外围设备集合@property (nonatomic, strong) NSMutableArray *peripherals;@end@implementation ViewController- (NSMutableArray *)peripherals{    if (!_peripherals) {        self.peripherals = [NSMutableArray array];    }    return _peripherals;}- (void)viewDidLoad {    [super viewDidLoad];    self.manager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];}// 扫描设备- (IBAction)scanPeripheral:(id)sender {    NSLog(@"扫描设备...");    // 扫描设备    [self.manager scanForPeripheralsWithServices:nil options:nil];}// 开始连接- (IBAction)startConnect:(id)sender {    for (CBPeripheral *peripheral in self.peripherals) {        NSLog(@"----->>>>>> peripheral == %@", peripheral);        if ([peripheral.name isEqualToString:@"MI"]) {            NSLog(@"这是公司的小米手环设备!");            // 中心设备 连接 外围设备            [self.manager connectPeripheral:peripheral options:nil];           }    }}// 断开连接- (IBAction)disConnect:(id)sender {}// 开始震动- (IBAction)startShake:(id)sender {}// 停止震动- (IBAction)stopShake:(id)sender {}#pragma mark -当前蓝牙主设备状态- (void)centralManagerDidUpdateState:(CBCentralManager *)central{    switch (central.state) {        case CBCentralManagerStateUnknown:            NSLog(@">>>CBCentralManagerStateUnknown");            break;        case CBCentralManagerStateResetting:            NSLog(@">>>CBCentralManagerStateResetting");            break;        case CBCentralManagerStateUnsupported:            NSLog(@">>>CBCentralManagerStateUnsupported");            break;        case CBCentralManagerStateUnauthorized:            NSLog(@">>>CBCentralManagerStateUnauthorized");            break;        case CBCentralManagerStatePoweredOff:            NSLog(@">>>CBCentralManagerStatePoweredOff");            break;        default:            break;    }}// 发现设备会进入方法- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI{    // 添加外围设备    if (![self.peripherals containsObject:peripheral]) {        // 设置外设的代理        peripheral.delegate = self;        [self.peripherals addObject:peripheral];        NSLog(@"扫描连接外设：%@ ",peripheral);        self.label.text = [NSString stringWithFormat:@"%@", peripheral];    }}/** *  连接到某个外设的时候调用 */- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral{    [central stopScan];    NSLog(@"连接上了");    // 查找外设中的所有服务    [peripheral discoverServices:nil];}#pragma mark - CBPeripheralDelegate/** *  外设已经查找到服务 */- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{    // 遍历所有的服务    for (CBService *service in peripheral.services) {        NSLog(@"服务 = %@", service);        // 过滤掉不想要的服务        if ([service.UUID.UUIDString isEqual:@"FEE0"]) {            // 找到想要的服务            // 扫描服务下面的特征            [peripheral discoverCharacteristics:nil forService:service];        }    }}- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error {    // 遍历所有的特征    for (CBCharacteristic *characteristic in service.characteristics) {        NSLog(@"特征 = %@", characteristic);        // 过滤掉不想要的特征        if ([characteristic.UUID.UUIDString isEqual:@"FF0C"]) {            // 找到想要的特征            NSLog(@"电量: %@", characteristic);            [peripheral readValueForCharacteristic:characteristic];        }    }}#pragma mark 设备信息处理//扫描到具体的值- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(nullable NSError *)error{    if (error) {        NSLog(@"扫描外设的特征失败！%@-> %@",peripheral.name, [error localizedDescription]);        self.title = @"find value error.";        return;    }    NSLog(@"%@ %@",characteristic.UUID.UUIDString,characteristic.value);    Byte *bufferBytes = (Byte *)characteristic.value.bytes;    int buterys = TCcbytesValueToInt(bufferBytes)&0xff;    NSLog(@"电池：%d%%",buterys);}@end

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