android 蓝牙获取服务数据手机蓝牙服务

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mob64ca140d2323 2024-07-01 17:30:22

文章标签 android 蓝牙获取服务数据 ui 外围设备特征值错误信息 文章分类 Android 移动开发

蓝牙这块主要熟悉了下CoreBluetooth。它主要分中央和周边设备。另参考:http://www.tuicool.com/articles/QnYFzi

这博客写的挺好，非常感谢！！

中央:

//
//  centerViewController.m
//  blueTooth
//
//  Created by City--Online on 15/6/8.
//  Copyright (c) 2015年 CYW. All rights reserved.
//

#import "centerViewController.h"
#import <CoreBluetooth/CoreBluetooth.h>
#define kServiceUUID @"C4FB2349-72FE-4CA2-94D6-1F3CB16331EE" //服务的UUID
#define kCharacteristicUUID @"6A3E4B28-522D-4B3B-82A9-D5E2004534FC" //特征的UUID

@interface centerViewController ()<CBCentralManagerDelegate,CBPeripheralDelegate>
@property (strong,nonatomic) CBCentralManager *centralManager;//中心设备管理器
@property (strong,nonatomic) NSMutableArray *peripherals;//连接的外围设备
@property (weak, nonatomic) IBOutlet UITextView *log;//日志记录
@end

@implementation centerViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.navigationItem.rightBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"开始" style:UIBarButtonItemStylePlain target:self action:@selector(startClick:)];
}
#pragma mark - UI事件
- (void)startClick:(UIBarButtonItem *)sender {
    //创建中心设备管理器并设置当前控制器视图为代理
    _centralManager=[[CBCentralManager alloc]initWithDelegate:self queue:nil];
}

#pragma mark - CBCentralManager代理方法
//中心服务器状态更新后
-(void)centralManagerDidUpdateState:(CBCentralManager *)central{
    switch (central.state) {
        case CBPeripheralManagerStatePoweredOn:
            NSLog(@"BLE已打开.");
            [self writeToLog:@"BLE已打开."];
            //扫描外围设备
            //            [central scanForPeripheralsWithServices:@[[CBUUID UUIDWithString:kServiceUUID]] options:@{CBCentralManagerScanOptionAllowDuplicatesKey:@YES}];
            [central scanForPeripheralsWithServices:nil options:@{CBCentralManagerScanOptionAllowDuplicatesKey:@YES}];
            break;
            
        default:
            NSLog(@"此设备不支持BLE或未打开蓝牙功能，无法作为外围设备.");
            [self writeToLog:@"此设备不支持BLE或未打开蓝牙功能，无法作为外围设备."];
            break;
    }
}
/**
 *  发现外围设备
 *
 *  @param central           中心设备
 *  @param peripheral        外围设备
 *  @param advertisementData 特征数据
 *  @param RSSI              信号质量（信号强度）
 */
-(void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI{
    NSLog(@"发现外围设备...");
    [self writeToLog:@"发现外围设备..."];
    //停止扫描
    [self.centralManager stopScan];
    //连接外围设备
    if (peripheral) {
        //添加保存外围设备，注意如果这里不保存外围设备（或者说peripheral没有一个强引用，无法到达连接成功（或失败）的代理方法，因为在此方法调用完就会被销毁
        if(![self.peripherals containsObject:peripheral]){
            [self.peripherals addObject:peripheral];
        }
        NSLog(@"开始连接外围设备...");
        [self writeToLog:@"开始连接外围设备..."];
        [self.centralManager connectPeripheral:peripheral options:nil];
    }
    
}
//连接到外围设备
-(void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral{
    NSLog(@"连接外围设备成功!");
    [self writeToLog:@"连接外围设备成功!"];
    //设置外围设备的代理为当前视图控制器
    peripheral.delegate=self;
    //外围设备开始寻找服务
    [peripheral discoverServices:@[[CBUUID UUIDWithString:kServiceUUID]]];
}
//连接外围设备失败
-(void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{
    NSLog(@"连接外围设备失败!");
    [self writeToLog:@"连接外围设备失败!"];
}

#pragma mark - CBPeripheral 代理方法
//外围设备寻找到服务后
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{
    NSLog(@"已发现可用服务...");
    [self writeToLog:@"已发现可用服务..."];
    if(error){
        NSLog(@"外围设备寻找服务过程中发生错误，错误信息：%@",error.localizedDescription);
        [self writeToLog:[NSString stringWithFormat:@"外围设备寻找服务过程中发生错误，错误信息：%@",error.localizedDescription]];
    }
    //遍历查找到的服务
    CBUUID *serviceUUID=[CBUUID UUIDWithString:kServiceUUID];
    CBUUID *characteristicUUID=[CBUUID UUIDWithString:kCharacteristicUUID];
    for (CBService *service in peripheral.services) {
        if([service.UUID isEqual:serviceUUID]){
            //外围设备查找指定服务中的特征
            [peripheral discoverCharacteristics:@[characteristicUUID] forService:service];
        }
    }
}
//外围设备寻找到特征后
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error{
    NSLog(@"已发现可用特征...");
    [self writeToLog:@"已发现可用特征..."];
    if (error) {
        NSLog(@"外围设备寻找特征过程中发生错误，错误信息：%@",error.localizedDescription);
        [self writeToLog:[NSString stringWithFormat:@"外围设备寻找特征过程中发生错误，错误信息：%@",error.localizedDescription]];
    }
    //遍历服务中的特征
    CBUUID *serviceUUID=[CBUUID UUIDWithString:kServiceUUID];
    CBUUID *characteristicUUID=[CBUUID UUIDWithString:kCharacteristicUUID];
    if ([service.UUID isEqual:serviceUUID]) {
        for (CBCharacteristic *characteristic in service.characteristics) {
            if ([characteristic.UUID isEqual:characteristicUUID]) {
                //情景一：通知
                /*找到特征后设置外围设备为已通知状态（订阅特征）：
                 *1.调用此方法会触发代理方法：-(void)peripheral:(CBPeripheral *)peripheral didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
                 *2.调用此方法会触发外围设备的订阅代理方法
                 */
                [peripheral setNotifyValue:YES forCharacteristic:characteristic];
                //情景二：读取
                //                [peripheral readValueForCharacteristic:characteristic];
                //                    if(characteristic.value){
                //                    NSString *value=[[NSString alloc]initWithData:characteristic.value encoding:NSUTF8StringEncoding];
                //                    NSLog(@"读取到特征值：%@",value);
                //                }
            }
        }
    }
}
//特征值被更新后
-(void)peripheral:(CBPeripheral *)peripheral didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{
    NSLog(@"收到特征更新通知...");
    [self writeToLog:@"收到特征更新通知..."];
    if (error) {
        NSLog(@"更新通知状态时发生错误，错误信息：%@",error.localizedDescription);
    }
    //给特征值设置新的值
    CBUUID *characteristicUUID=[CBUUID UUIDWithString:kCharacteristicUUID];
    if ([characteristic.UUID isEqual:characteristicUUID]) {
        if (characteristic.isNotifying) {
            if (characteristic.properties==CBCharacteristicPropertyNotify) {
                NSLog(@"已订阅特征通知.");
                [self writeToLog:@"已订阅特征通知."];
                return;
            }else if (characteristic.properties ==CBCharacteristicPropertyRead) {
                //从外围设备读取新值,调用此方法会触发代理方法：-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
                [peripheral readValueForCharacteristic:characteristic];
            }
            
        }else{
            NSLog(@"停止已停止.");
            [self writeToLog:@"停止已停止."];
            //取消连接
            [self.centralManager cancelPeripheralConnection:peripheral];
        }
    }
}
//更新特征值后（调用readValueForCharacteristic:方法或者外围设备在订阅后更新特征值都会调用此代理方法）
-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{
    if (error) {
        NSLog(@"更新特征值时发生错误，错误信息：%@",error.localizedDescription);
        [self writeToLog:[NSString stringWithFormat:@"更新特征值时发生错误，错误信息：%@",error.localizedDescription]];
        return;
    }
    if (characteristic.value) {
        NSString *value=[[NSString alloc]initWithData:characteristic.value encoding:NSUTF8StringEncoding];
        NSLog(@"读取到特征值：%@",value);
        [self writeToLog:[NSString stringWithFormat:@"读取到特征值：%@",value]];
    }else{
        NSLog(@"未发现特征值.");
        [self writeToLog:@"未发现特征值."];
    }
}

#pragma mark - 属性
-(NSMutableArray *)peripherals{
    if(!_peripherals){
        _peripherals=[NSMutableArray array];
    }
    return _peripherals;
}

#pragma mark - 私有方法
/**
 *  记录日志
 *
 *  @param info 日志信息
 */
-(void)writeToLog:(NSString *)info{
    self.log.text=[NSString stringWithFormat:@"%@\r\n%@",self.log.text,info];
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end

周边:

//
//  peripheralViewController.m
//  blueTooth
//
//  Created by City--Online on 15/6/8.
//  Copyright (c) 2015年 CYW. All rights reserved.
//

#import "peripheralViewController.h"
#import <CoreBluetooth/CoreBluetooth.h>
#define kPeripheralName @"Yvan Cui's Device" //外围设备名称
#define kServiceUUID @"C4FB2349-72FE-4CA2-94D6-1F3CB16331EE" //服务的UUID
#define kCharacteristicUUID @"6A3E4B28-522D-4B3B-82A9-D5E2004534FC" //特征的UUID

@interface peripheralViewController ()<CBPeripheralManagerDelegate>
@property (strong,nonatomic) CBPeripheralManager *peripheralManager;//外围设备管理器

@property (strong,nonatomic) NSMutableArray *centralM;//订阅此外围设备特征的中心设备

@property (strong,nonatomic) CBMutableCharacteristic *characteristicM;//特征
@property (weak, nonatomic) IBOutlet UITextView *log; //日志记录
@end

@implementation peripheralViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.navigationItem.rightBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"开始" style:UIBarButtonItemStylePlain target:self action:@selector(startClick:)];
    self.navigationItem.leftBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"更新" style:UIBarButtonItemStylePlain target:self action:@selector(transferClick:)];
   
}
#pragma mark - UI事件
//创建外围设备
- (void)startClick:(UIBarButtonItem *)sender {
    _peripheralManager=[[CBPeripheralManager alloc]initWithDelegate:self queue:nil];
}
//更新数据
- (void)transferClick:(UIBarButtonItem *)sender {
    [self updateCharacteristicValue];
}

#pragma mark - CBPeripheralManager代理方法
//外围设备状态发生变化后调用
-(void)peripheralManagerDidUpdateState:(CBPeripheralManager *)peripheral{
    switch (peripheral.state) {
        case CBPeripheralManagerStatePoweredOn:
            NSLog(@"BLE已打开.");
            [self writeToLog:@"BLE已打开."];
            //添加服务
            [self setupService];
            break;
            
        default:
            NSLog(@"此设备不支持BLE或未打开蓝牙功能，无法作为外围设备.");
            [self writeToLog:@"此设备不支持BLE或未打开蓝牙功能，无法作为外围设备."];
            break;
    }
}
//外围设备添加服务后调用
-(void)peripheralManager:(CBPeripheralManager *)peripheral didAddService:(CBService *)service error:(NSError *)error{
    if (error) {
        NSLog(@"向外围设备添加服务失败，错误详情：%@",error.localizedDescription);
        [self writeToLog:[NSString stringWithFormat:@"向外围设备添加服务失败，错误详情：%@",error.localizedDescription]];
        return;
    }
    
    //添加服务后开始广播
    NSDictionary *dic=@{CBAdvertisementDataLocalNameKey:kPeripheralName};//广播设置
    [self.peripheralManager startAdvertising:dic];//开始广播
    NSLog(@"向外围设备添加了服务并开始广播...");
    [self writeToLog:@"向外围设备添加了服务并开始广播..."];
}
-(void)peripheralManagerDidStartAdvertising:(CBPeripheralManager *)peripheral error:(NSError *)error{
    if (error) {
        NSLog(@"启动广播过程中发生错误，错误信息：%@",error.localizedDescription);
        [self writeToLog:[NSString stringWithFormat:@"启动广播过程中发生错误，错误信息：%@",error.localizedDescription]];
        return;
    }
    NSLog(@"启动广播...");
    [self writeToLog:@"启动广播..."];
}
//订阅特征
-(void)peripheralManager:(CBPeripheralManager *)peripheral central:(CBCentral *)central didSubscribeToCharacteristic:(CBCharacteristic *)characteristic{
    NSLog(@"中心设备：%@ 已订阅特征：%@.",central,characteristic);
    [self writeToLog:[NSString stringWithFormat:@"中心设备：%@ 已订阅特征：%@.",central.identifier.UUIDString,characteristic.UUID]];
    //发现中心设备并存储
    if (![self.centralM containsObject:central]) {
        [self.centralM addObject:central];
    }
    /*中心设备订阅成功后外围设备可以更新特征值发送到中心设备,一旦更新特征值将会触发中心设备的代理方法：
     -(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
     */
    
    //    [self updateCharacteristicValue];
}
//取消订阅特征
-(void)peripheralManager:(CBPeripheralManager *)peripheral central:(CBCentral *)central didUnsubscribeFromCharacteristic:(CBCharacteristic *)characteristic{
    NSLog(@"didUnsubscribeFromCharacteristic");
}
-(void)peripheralManager:(CBPeripheralManager *)peripheral didReceiveWriteRequests:(CBATTRequest *)request{
    NSLog(@"didReceiveWriteRequests");
}
-(void)peripheralManager:(CBPeripheralManager *)peripheral willRestoreState:(NSDictionary *)dict{
    NSLog(@"willRestoreState");
}
#pragma mark -属性
-(NSMutableArray *)centralM{
    if (!_centralM) {
        _centralM=[NSMutableArray array];
    }
    return _centralM;
}

#pragma mark - 私有方法
//创建特征、服务并添加服务到外围设备
-(void)setupService{
    /*1.创建特征*/
    //创建特征的UUID对象
    CBUUID *characteristicUUID=[CBUUID UUIDWithString:kCharacteristicUUID];
    //特征值
    //    NSString *valueStr=kPeripheralName;
    //    NSData *value=[valueStr dataUsingEncoding:NSUTF8StringEncoding];
    //创建特征
    /** 参数
     * uuid:特征标识
     * properties:特征的属性，例如：可通知、可写、可读等
     * value:特征值
     * permissions:特征的权限
     */
    CBMutableCharacteristic *characteristicM=[[CBMutableCharacteristic alloc]initWithType:characteristicUUID properties:CBCharacteristicPropertyNotify value:nil permissions:CBAttributePermissionsReadable];
    self.characteristicM=characteristicM;
    //    CBMutableCharacteristic *characteristicM=[[CBMutableCharacteristic alloc]initWithType:characteristicUUID properties:CBCharacteristicPropertyRead value:nil permissions:CBAttributePermissionsReadable];
    //    characteristicM.value=value;
    
    /*创建服务并且设置特征*/
    //创建服务UUID对象
    CBUUID *serviceUUID=[CBUUID UUIDWithString:kServiceUUID];
    //创建服务
    CBMutableService *serviceM=[[CBMutableService alloc]initWithType:serviceUUID primary:YES];
    //设置服务的特征
    [serviceM setCharacteristics:@[characteristicM]];
    
    
    /*将服务添加到外围设备*/
    [self.peripheralManager addService:serviceM];
}
//更新特征值
-(void)updateCharacteristicValue{
    //特征值
    NSString *valueStr=[NSString stringWithFormat:@"%@ --%@",kPeripheralName,[NSDate   date]];
    NSData *value=[valueStr dataUsingEncoding:NSUTF8StringEncoding];
    //更新特征值
    [self.peripheralManager updateValue:value forCharacteristic:self.characteristicM onSubscribedCentrals:nil];
    [self writeToLog:[NSString stringWithFormat:@"更新特征值：%@",valueStr]];
}
/**
 *  记录日志
 *
 *  @param info 日志信息
 */
-(void)writeToLog:(NSString *)info{
    self.log.text=[NSString stringWithFormat:@"%@\r\n%@",self.log.text,info];
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end

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