一台手机连接2个蓝牙

1. 框架
 利用蓝牙CoreBluetooth框架 在7.0以上就用这个连接蓝牙框架。 
2.连接
 连接多台蓝牙设备与单台连接蓝牙设备的道理是一样，同样需要首先发现蓝牙设备然后把发现的设备添加到一个 NSMutableArray 保存起来。 
具体看下面代码： 
首先 我们需要创建 
@property (nonatomic,strong ) CBCentralManager *manager;// 中心设备
@property (nonatomic,strong ) NSMutableArray   <CBPeripheral*>*devices;// 扫描到的外围设备
@property (nonatomic, strong) NSMutableArray   *connectSuccess;//连接成功的的外设
 
上面 CBCentralManager 是指定的中心设备（手机 ，平板…) 
而 CBPeripheral 所指的是需要连接的蓝牙设备（耳机,手表，手环…等等） 
需要一个 connectSuccess 用来保存连接成功的设备。 
设置 CBCentralManager 代理 
@interface ViewController ()<CBCentralManagerDelegate>
 
当打开程序的时候就要实现此代理 CBCentralManagerDelegate 
并自动检查手机蓝牙是否打开，只有打开的时候才会去自动的扫描蓝牙设备 
//中心设备状态改变的代理必须实现
- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
    switch (central.state)
    {
        case CBManagerStatePoweredOn:
            NSLog(@"蓝牙已打开");
            //自动开始扫描
            [self startScan];
            break;
        case CBManagerStateUnknown:
            break;
        case CBManagerStatePoweredOff:
            NSLog(@"蓝牙未打开");
            
            break;
        case CBManagerStateResetting:
            //            [self showInfo:@"蓝牙初始化中"];
            break;
        case CBManagerStateUnsupported:
            NSLog(@"蓝牙不支持状态");
            
            //            [self showInfo:@"蓝牙不支持状态"];
            break;
        case CBManagerStateUnauthorized:
            //            [self showInfo:@"蓝牙设备未授权"];
            break;
        default:
            break;
    }
}

 
扫描蓝牙 
下面的代码 扫描不是一直在进行 15秒后结束扫描 
/*
 * 开始扫描
 */
-(void) startScan{
    NSLog(@"scan....");
    [self.manager scanForPeripheralsWithServices:nil options:nil];
    //15秒后停止。
    //(开启扫描后会不停的扫描)
    [self performSelector:@selector(stopScan) withObject:nil afterDelay:15];
}

 
停止扫描 
中心设备停止（手机、平板…） 
/**
 *  停止扫描
 */
-(void)stopScan{
    [self.manager stopScan];
    NSLog(@"stopScan....");
}
 
扫描到设备就要添加设备 最好是放到tableview中 
并所有扫描出来的 peripheral 添加到 self.devices 中 
相应的tableview也要刷新一下 
/**
 *  扫描蓝牙的代理
 *
 *  @param central           中心设备
 *  @param peripheral        扫描到的蓝牙
 *  @param advertisementData 在ios中蓝牙广播信息中通常会包含以下4种类型的信息。ios的蓝牙通信协议中不接受其他类型的广播信息。
 因此需要注意的是，如果需要在扫描设备时，通过蓝牙设备的Mac地址来唯一辨别设备，那么需要与蓝牙设备的硬件工程师沟通好：将所需要的Mac地址放到一下几种类型的广播信息中。
 通常放到kCBAdvDataManufacturerData这个字段中。
 kCBAdvDataIsConnectable = 1;
 kCBAdvDataLocalName = XXXXXX;
 kCBAdvDataManufacturerData = <XXXXXXXX>;
 kCBAdvDataTxPowerLevel = 0;
 *  @param RSSI              信号强度
 */
//扫描到的蓝牙设备添加到devices数组中，刷新列表
-(void)centralManager:(CBCentralManager *)central
didDiscoverPeripheral:(CBPeripheral *)peripheral
    advertisementData:(NSDictionary<NSString *,id> *)advertisementData
                 RSSI:(NSNumber *)RSSI{
    if (![self.devices containsObject:peripheral]) {
        [self.devices addObject:peripheral];
        [self.tableView reloadData];
        NSLog(@"发现外围设备:%@---RSSI:%@---advertisementData:%@",peripheral,RSSI,advertisementData);
    }
}

 
点击tableview中各个蓝牙选择项 并连接蓝牙 提示给用户 连接成功 
并把连接成功的 peripheral 添加到 self.connectSuccess中 
/**
 *  蓝牙连接成功时候的代理
 *
 *  @param central    中心设备
 *  @param peripheral 当前连接的设备
 */
-(void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral{
    NSLog(@"%@名字的蓝牙连接成功",peripheral.name);
    _maincell.txtDeviceContent.text = @"已连接";
    //cell.detailTextLabel.text = @"已连接";
    [self.connectSuccess addObject:peripheral];
}

 
同样也有失败和断开的时候 
失败的时候不做处理 也可以做处理
 但是断开的时候 需要把 连接成功的 self.connectSuccess 设备移除掉
 并在tableview中把 连接成功的文字清空。这样就变为没有连接的状态 
/**
 *  蓝牙链接失败的代理
 *
 *  @param central    中心设备
 *  @param peripheral 当前连接的外设
 *  @param error      错误信息
 */
- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(nullable NSError *)error;{
    NSLog(@"%@名字的蓝牙连接失败",peripheral.name);
}
/**
 *  蓝牙断开连接的代理
 *
 *  @param central    中心设备
 *  @param peripheral 当前需要断开连接的外设
 *  @param error      错误信息
 */
-(void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{
    NSLog(@"%@名字的蓝牙断开链接",peripheral.name);
    _maincell.txtDeviceContent.text = @"";
    
    for(int i=0;i<_connectSuccess.count;i++){
        CBPeripheral *p = [_connectSuccess objectAtIndex:i];
        if ([p.identifier.UUIDString isEqualToString:peripheral.identifier.UUIDString]) {
            [self.connectSuccess removeObject:p];
        }
    }
}

 
具体的连接的代码如下：
 头部没有东西
 ViewController.m 
//
//  ViewController.m
//

#import "ViewController.h"
#import <CoreBluetooth/CoreBluetooth.h>
#import "mainViewCell.h"


@interface ViewController ()<CBCentralManagerDelegate,UITableViewDelegate,UITableViewDataSource>


- (IBAction)btnSure:(id)sender;


@property (weak, nonatomic) IBOutlet UITableView *tableView;

@property(nonatomic,strong) mainViewCell *maincell;
@property (nonatomic,strong ) CBCentralManager *manager;// 中心设备
@property (nonatomic,strong ) NSMutableArray   <CBPeripheral*>*devices;// 扫描到的外围设备
@property (nonatomic, strong) NSMutableArray   *connectSuccess;//链接成功的的外设

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIColor *blues = [self stringTOColor:@"#436EEE"];
    [self.navigationController.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor],UITextAttributeTextColor,nil]];
    [self.navigationController.navigationBar setBarTintColor:blues];
    self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
    
    UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:nil action:nil];
    self.navigationItem.backBarButtonItem = item;
    
    _maincell = [[mainViewCell alloc] init];
    self.manager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
    self.devices = [NSMutableArray array];
    self.connectSuccess = [NSMutableArray array];
    
    self.tableView.delegate = self;
    self.tableView.dataSource = self;
    
    //创建下啦刷新
    //UIRefreshControl *rc = [[UIRefreshControl alloc] init];
    //rc.attributedTitle = [[NSAttributedString alloc] initWithString:@"Drop Scan"];
    
    //[rc addTarget:self action:@selector(redreshTableView) forControlEvents:UIControlEventValueChanged];
    
    //self.refreshControl = rc;
    
   
    
}

/*
 * 字符串转为颜色值
 */
- (UIColor *) stringTOColor:(NSString *)str
{
    if (!str || [str isEqualToString:@""]) {
        return nil;
    }
    unsigned red,green,blue;
    NSRange range;
    range.length = 2;
    range.location = 1;
    [[NSScanner scannerWithString:[str substringWithRange:range]] scanHexInt:&red];
    range.location = 3;
    [[NSScanner scannerWithString:[str substringWithRange:range]] scanHexInt:&green];
    range.location = 5;
    [[NSScanner scannerWithString:[str substringWithRange:range]] scanHexInt:&blue];
    UIColor *color= [UIColor colorWithRed:red/255.0f green:green/255.0f blue:blue/255.0f alpha:1];
    return color;
}

/*
 * 开始扫描
 */
-(void) startScan{
    NSLog(@"scan....");
    
    [self.manager scanForPeripheralsWithServices:nil options:nil];
    
    //[self.manager scanForPeripheralsWithServices:nil options:@{CBCentralManagerScanOptionAllowDuplicatesKey:@YES}];
    //3秒后停止。(开启扫描后会不停的扫描)
    [self performSelector:@selector(stopScan) withObject:nil afterDelay:15];
}

/**
 *  停止扫描
 */
-(void)stopScan{
    [self.manager stopScan];
    NSLog(@"stopScan....");
}

//中心设备状态改变的代理必须实现
- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
    switch (central.state)
    {
        case CBManagerStatePoweredOn:
            NSLog(@"蓝牙已打开");
            //自动开始扫描
            [self startScan];
            break;
        case CBManagerStateUnknown:
            break;
        case CBManagerStatePoweredOff:
            NSLog(@"蓝牙未打开");
            
            break;
        case CBManagerStateResetting:
            //            [self showInfo:@"蓝牙初始化中"];
            break;
        case CBManagerStateUnsupported:
            NSLog(@"蓝牙不支持状态");
            
            //            [self showInfo:@"蓝牙不支持状态"];
            break;
        case CBManagerStateUnauthorized:
            //            [self showInfo:@"蓝牙设备未授权"];
            break;
        default:
            break;
    }
}



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

/**
 *  扫描蓝牙的代理
 *
 *  @param central           中心设备
 *  @param peripheral        扫描到的蓝牙
 *  @param advertisementData 在ios中蓝牙广播信息中通常会包含以下4种类型的信息。ios的蓝牙通信协议中不接受其他类型的广播信息。
 因此需要注意的是，如果需要在扫描设备时，通过蓝牙设备的Mac地址来唯一辨别设备，那么需要与蓝牙设备的硬件工程师沟通好：将所需要的Mac地址放到一下几种类型的广播信息中。
 通常放到kCBAdvDataManufacturerData这个字段中。
 kCBAdvDataIsConnectable = 1;
 kCBAdvDataLocalName = XXXXXX;
 kCBAdvDataManufacturerData = <XXXXXXXX>;
 kCBAdvDataTxPowerLevel = 0;
 *  @param RSSI              信号强度
 */
//扫描到的蓝牙设备添加到devices数组中，刷新列表
-(void)centralManager:(CBCentralManager *)central
didDiscoverPeripheral:(CBPeripheral *)peripheral
    advertisementData:(NSDictionary<NSString *,id> *)advertisementData
                 RSSI:(NSNumber *)RSSI{
    if (![self.devices containsObject:peripheral]) {
        [self.devices addObject:peripheral];
        [self.tableView reloadData];
        NSLog(@"发现外围设备:%@---RSSI:%@---advertisementData:%@",peripheral,RSSI,advertisementData);
    }
}
/**
 *  蓝牙连接成功时候的代理
 *
 *  @param central    中心设备
 *  @param peripheral 当前连接的设备
 */
-(void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral{
    NSLog(@"%@名字的蓝牙连接成功",peripheral.name);
    _maincell.txtDeviceContent.text = @"已连接";
    //cell.detailTextLabel.text = @"已连接";
    [self.connectSuccess addObject:peripheral];
}
/**
 *  蓝牙链接失败的代理
 *
 *  @param central    中心设备
 *  @param peripheral 当前连接的外设
 *  @param error      错误信息
 */
- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(nullable NSError *)error;{
    NSLog(@"%@名字的蓝牙连接失败",peripheral.name);
}
/**
 *  蓝牙断开连接的代理
 *
 *  @param central    中心设备
 *  @param peripheral 当前需要断开连接的外设
 *  @param error      错误信息
 */
-(void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{
    NSLog(@"%@名字的蓝牙断开链接",peripheral.name);
    _maincell.txtDeviceContent.text = @"";
    
    for(int i=0;i<_connectSuccess.count;i++){
        CBPeripheral *p = [_connectSuccess objectAtIndex:i];
        if ([p.identifier.UUIDString isEqualToString:peripheral.identifier.UUIDString]) {
            [self.connectSuccess removeObject:p];
        }

    }
    
    /*for (CBPeripheral *p in self.connectSuccess) {
        if ([p.identifier.UUIDString isEqualToString:peripheral.identifier.UUIDString]) {
            [self.connectSuccess removeObject:p];
        }
    }*/
}


-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    [self.manager connectPeripheral:self.devices[indexPath.row] options:nil];
    _maincell = [tableView cellForRowAtIndexPath:indexPath];
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return self.devices.count;
    
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *CellIdentifier = @"ViewCell";
    
    mainViewCell *cell1 = [tableView
                              dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell1 == nil) {
        cell1 = [[mainViewCell alloc]
                 initWithStyle:UITableViewCellStyleValue1
                 reuseIdentifier:CellIdentifier];
    }
    
    if (!self.devices[indexPath.row].name) {
        cell1.txtDeviceName.text=@"null";
    }else{
        cell1.txtDeviceName.text=self.devices[indexPath.row].name;
        //cell1.txtDeviceAddre.text=self.devices[indexPath.row].identifier;
        NSString *c = [NSString stringWithFormat:@"%@",self.devices[indexPath.row].identifier];
        NSString *b = NULL;
        if ([[UIDevice currentDevice].systemVersion floatValue] < 10.0) {
            b = [c substringFromIndex:30];
        }else{
            b = [c substringFromIndex:30];
        }
        cell1.txtDeviceAddre.text = b;
    }
    return cell1;
    
}


-(BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath{
    mainViewCell *cell2 = [tableView cellForRowAtIndexPath:indexPath];
    if ([cell2.txtDeviceContent.text isEqualToString:@"已连接"]) {
        return YES;
    }
    return NO;
}

- (NSArray<UITableViewRowAction *> *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath{
    _maincell = [tableView cellForRowAtIndexPath:indexPath];
    UITableViewRowAction *disconnect = [UITableViewRowAction rowActionWithStyle:1 title:@"断开连接" handler:^(UITableViewRowAction * _Nonnull action, NSIndexPath * _Nonnull indexPath) {
        //断开蓝牙连接
        CBPeripheral *peripheral = self.devices[indexPath.row];
        [self.manager cancelPeripheralConnection:peripheral];
        [self.tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationLeft];
    }];
    return @[disconnect];
}


- (IBAction)btnSure:(id)sender {
    LinkViewController *link = [[LinkViewController alloc] init];
    if (self.connectSuccess.count > 0)
    {
        for (int i = 0; i < self.connectSuccess.count; i++) {
            CBPeripheral *p = self.connectSuccess[i];
            if (i == 0) {
                link.oneperipheral = p;
            }
            else if (i == 1) {
                link.twoperipheral = p;
            }
            else if(i == 2){
                link.threeperipheral = p;
            }
            else if(i==3){
                link.fourperipheral = p;
            }
            else if(i==4){
                link.fiveperipheral = p;
            }
            else if(i==5){
                link.sexperipheral = p;
            }
            else if(i==6){
                link.sevenperipheral = p;
            }
        }
        [self.navigationController pushViewController:link animated:YES];
    }
}

@end

 
3.数据读取
 这里的数据读取是分开来写的 如果是同样的设备 并底层给的UUID 接收和发送数据是同样的话可以写一个就可以并可以用tabview 中的cell来写
 但是如果需要连接不相同的UUID的时候 并解析格式不一样介意使用多个 
我创建的是view 可以使用MVC 来实现 创建NSObject也可以 毕竟是 数据获取 
用不上view 
如 OneView.h 
#import <UIKit/UIKit.h>
#import <CoreBluetooth/CoreBluetooth.h>

@interface OneView : UIView<CBPeripheralDelegate>

@property (nonatomic, strong) UITextView *textView;
@property (nonatomic, strong) CBCharacteristic *oneNotiC, *oneWriteC;
@property (nonatomic, strong) NSMutableString *mutStr;

@end
 
OneView.m 如下 
在这个里面 我们连接到设备之后 需要读取 peripheral 里面的UUID 包含了服务和特征的 UUID 
首先读取服务的 一样的要实现 CBPeripheralDelegate 代理 
#pragma mark - 外围设备服务的代理
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
{
    //NSLog(@"123");
    for (CBService *s in peripheral.services) {
        NSLog(@"%@",[s.UUID UUIDString]);
        [peripheral discoverCharacteristics:nil forService:s];
    }
}

 
当发现了服务UUID之后 我们需要 服务里面的具体携带的特征UUID 也是数据解析的 UUID 
这里面有些是多余的你可以选择你自己需要的 
#pragma mark 2. 外围设备 扫描到服务下有哪些特征
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(nonnull CBService *)service error:(nullable NSError *)error
{
    if (error){
        NSLog(@"扫描特征出现错误,错误原因:%@",error);
    }else{
        //拿到服务中所有的特征
        NSArray *characteristics = service.characteristics;
        //遍历特征,拿到需要的特征进行处理
        for (CBCharacteristic *characteristic in characteristics){
            NSLog(@"所有的特征为:%@",characteristic.UUID.UUIDString);
            //如果是温度数据处理
            if([characteristic.UUID.UUIDString isEqualToString:@"底层给你的UUID"]){
                //将全部的特征信息打印出来
                //_peripheral = peripheral;
                [peripheral setNotifyValue:YES forCharacteristic:characteristic];
                NSLog(@"%@",characteristic);
            }
            //这里是发送 设备设置蓝牙发送温度数据的值
            else if([characteristic.UUID.UUIDString isEqualToString:@"底层给你的UUID"]){
                [peripheral setNotifyValue:YES forCharacteristic:characteristic];
                NSLog(@"写入的值为:%@",characteristic);
            }
            //如果是ota进行ota升级
            else if([characteristic.UUID.UUIDString isEqualToString:@"底层给你的UUID"]){
                //_peripheral = peripheral;
                //设置通知
                [peripheral setNotifyValue:YES forCharacteristic:characteristic];
                NSString *s = @"OTA";
                NSDictionary *tempOta = [NSDictionary dictionaryWithObject:s forKey:@"ota"];
                [[NSNotificationCenter defaultCenter] postNotificationName:@"tempOTA" object:nil userInfo:tempOta];
            }
            //无键按钮DFU
            else if([characteristic.UUID.UUIDString isEqualToString:@"底层给你的UUID"]){
                [peripheral setNotifyValue:YES forCharacteristic:characteristic];
                NSLog(@"写入的OTA值为:%@",characteristic);
            }
        }
    }
}

 
当读取到你需要的UUID的时候直接读取数据
 在这里面你 可以用你们底层给你们的算法去解析数据 
我写的不代表你的 
#pragma mark 3.接收外围设备的数据（这里就能接到蓝牙发送过来的数据，具体协议就要看你们是怎么定义的）
-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{
    
    NSString *temps=[self getTempData:characteristic];
    //self.textView.text = temps;
    //发送广播来更新通知信息
    //第一个的温度数据
    
    NSString *blename = peripheral.name;
    NSString *c = [NSString stringWithFormat:@"%@",peripheral.identifier];
    NSString *b = NULL;
    if ([[UIDevice currentDevice].systemVersion floatValue] < 10.0) {
        b = [c substringFromIndex:30];
    }else{
        b = [c substringFromIndex:30];
    }

    NSString *bleaddre = b;
    NSString *tempss = [temps stringByAppendingString:@","];
    NSString *tempsss = [blename stringByAppendingString:@","];
    NSString *tempssss = [tempsss stringByAppendingString:bleaddre];
    NSString *tempsssss = [tempss stringByAppendingString:tempssss];
    
    NSDictionary *tempDict = [NSDictionary dictionaryWithObject:tempsssss forKey:@"tempOne"];
    [[NSNotificationCenter defaultCenter] postNotificationName:@"tempNofictionOne" object:nil userInfo:tempDict];
}

 
还需要打开通知 我这个项目是通过接收通知来更新温度数据的 
//设置通知
-(void)notifyCharacteristic:(CBPeripheral *)peripheral
             characteristic:(CBCharacteristic *)characteristic{
    //设置通知，数据通知会进入：didUpdateValueForCharacteristic方法
    [peripheral setNotifyValue:YES forCharacteristic:characteristic];
    //[_centerManager stopScan];
}

 
OneView.m详细代码 
//
//  OneView.m
//  LHTempProject
//
//  Created by rnd on 2017/5/2.
//  Copyright © 2017年 GoDream. All rights reserved.
//

#import "OneView.h"

@implementation OneView

-(instancetype)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:frame];
    if (self) {
        self.mutStr = [NSMutableString string];
        //[self addTextView];
    }
    return self;
}

//添加textView
-(void)addTextView{
    self.textView = [[UITextView alloc] initWithFrame:self.bounds];
    self.textView.backgroundColor = [UIColor whiteColor];
    [self addSubview:self.textView];
}

#pragma mark - 外围设备服务的代理
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
{
    //NSLog(@"123");
    for (CBService *s in peripheral.services) {
        NSLog(@"%@",[s.UUID UUIDString]);
        [peripheral discoverCharacteristics:nil forService:s];
    }
}
#pragma mark 2. 外围设备 扫描到服务下有哪些特征
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(nonnull CBService *)service error:(nullable NSError *)error
{
    if (error){
        NSLog(@"扫描特征出现错误,错误原因:%@",error);
    }else{
        //拿到服务中所有的特征
        NSArray *characteristics = service.characteristics;
        //遍历特征,拿到需要的特征进行处理
        for (CBCharacteristic *characteristic in characteristics){
            NSLog(@"所有的特征为:%@",characteristic.UUID.UUIDString);
            //如果是温度数据处理
            if([characteristic.UUID.UUIDString isEqualToString:@"783F2991-23E0-4BDC-AC16-78601BD84B39"]){
                //将全部的特征信息打印出来
                //_peripheral = peripheral;
                [peripheral setNotifyValue:YES forCharacteristic:characteristic];
                NSLog(@"%@",characteristic);
            }
            //这里是发送 设备设置蓝牙发送温度数据的值
            else if([characteristic.UUID.UUIDString isEqualToString:@"849B5163-93BE-4229-9A6A-BB38D6471917"]){
                [peripheral setNotifyValue:YES forCharacteristic:characteristic];
                NSLog(@"写入的值为:%@",characteristic);
            }
            //如果是ota进行ota升级
            else if([characteristic.UUID.UUIDString isEqualToString:@"00060001-F8CE-11E4-ABF4-0002A5D5C51B"]){
                //_peripheral = peripheral;
                //设置通知
                [peripheral setNotifyValue:YES forCharacteristic:characteristic];
                NSString *s = @"OTA";
                NSDictionary *tempOta = [NSDictionary dictionaryWithObject:s forKey:@"ota"];
                [[NSNotificationCenter defaultCenter] postNotificationName:@"tempOTA" object:nil userInfo:tempOta];
            }
            //无键按钮DFU
            else if([characteristic.UUID.UUIDString isEqualToString:@"33040179-CAC9-4A06-B83D-433ED3F8C55E"]){
                [peripheral setNotifyValue:YES forCharacteristic:characteristic];
                NSLog(@"写入的OTA值为:%@",characteristic);
            }
        }
    }
    
}

#pragma mark 3.接收外围设备的数据（这里就能接到蓝牙发送过来的数据，具体协议就要看你们是怎么定义的）
-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{
    
    NSString *temps=[self getTempData:characteristic];
    //self.textView.text = temps;
    //发送广播来更新通知信息
    //第一个的温度数据
    
    NSString *blename = peripheral.name;
    NSString *c = [NSString stringWithFormat:@"%@",peripheral.identifier];
    NSString *b = NULL;
    if ([[UIDevice currentDevice].systemVersion floatValue] < 10.0) {
        b = [c substringFromIndex:30];
    }else{
        b = [c substringFromIndex:30];
    }

    NSString *bleaddre = b;
    NSString *tempss = [temps stringByAppendingString:@","];
    NSString *tempsss = [blename stringByAppendingString:@","];
    NSString *tempssss = [tempsss stringByAppendingString:bleaddre];
    NSString *tempsssss = [tempss stringByAppendingString:tempssss];
    
    NSDictionary *tempDict = [NSDictionary dictionaryWithObject:tempsssss forKey:@"tempOne"];
    [[NSNotificationCenter defaultCenter] postNotificationName:@"tempNofictionOne" object:nil userInfo:tempDict];
}

//设置通知
-(void)notifyCharacteristic:(CBPeripheral *)peripheral
             characteristic:(CBCharacteristic *)characteristic{
    //设置通知，数据通知会进入：didUpdateValueForCharacteristic方法
    [peripheral setNotifyValue:YES forCharacteristic:characteristic];
    //[_centerManager stopScan];
}

/*
 * 温度数据的转换
 */

-(NSString *)getTempDatas:(CBCharacteristic *)characteristic{
    NSString *tempUnit;
    int temps = 0;
    NSData *data= characteristic.value;
    if(data!=nil){
        const uint8_t *bytes = [data bytes];
        int b0,b1,b2,b3;
        b0 = bytes[1]&0xff;
        b1 = bytes[2]&0xff;
        b2 = bytes[3]&0xff;
        b3 = bytes[4]&0xff;
        
        temps = (b0<<24)|(b1<<16)|(b2<<8)|b3;
        const uint8_t flagByte = bytes[0];
        if ((flagByte & 0x01) != 0) {
            tempUnit = @"°F";
            //[_userDefaults setObject:tempUnit forKey:@"tempUnit"]; //存储温度数据
        } else {
            tempUnit = @"°C";
            //[_userDefaults setObject:tempUnit forKey:@"tempUnit"];
        }
    }
    
    float a = temps;
    //保留小数点后面的1位小数
    NSString *s = [NSString stringWithFormat:@"%.1f",a/10];
    NSString *ss = [NSString stringWithFormat:@"%@,%@",s,tempUnit];
    return ss;
}

-(NSString *)getTempData:(CBCharacteristic *)characteristic{
    NSString *tempUnit;
    int temps = 0;
    int alarm = 0;
    int normal = 0;
    NSData *data= characteristic.value;
    if(data!=nil){
        const uint8_t *bytes = [data bytes];
        int b0,b1,b2,b3,b4,b5,b6,b7,b8,b9;
        b0 = bytes[0]&0xff;
        b1 = bytes[1]&0xff;
        b2 = bytes[2]&0xff;
        b3 = bytes[3]&0xff;
        b4 = bytes[4]&0xff;
        b5 = bytes[5]&0xff;
        b6 = bytes[6]&0xff;
        b7 = bytes[7]&0xff;
        b8 = bytes[8]&0xff;
        b9 = bytes[9]&0xff;
        
        temps = (b5<<24)|(b4<<16)|(b3<<8)|b2;
        
        alarm = (b9<<24)|(b8<<16)|(b7<<8)|b6;
        
        const uint8_t flagBB = bytes[1];
        
        normal = flagBB&0x01;
        
        const uint8_t flagByte = bytes[0];
        
        if ((flagByte & 0x01) != 0) {
            tempUnit = @"°F";
            //[_userDefaults setObject:tempUnit forKey:@"tempUnit"]; //存储温度数据
        } else {
            tempUnit = @"°C";
            //[_userDefaults setObject:tempUnit forKey:@"tempUnit"];
        }
    }
    
    float a = temps;
    //保留小数点后面的1位小数
    NSString *am = [NSString stringWithFormat:@"%d",alarm];
    NSString *no = [NSString stringWithFormat:@"%d",normal];
    
    NSString *zuhe = [am stringByAppendingString:@","];
    
    NSString *zuhe1 = [zuhe stringByAppendingString:no];
    
    NSString *s = [NSString stringWithFormat:@"%.1f",a];
    //NSString *ss = [NSString stringWithFormat:@"%@,%@",s,tempUnit];
    NSString *ss = [NSString stringWithFormat:@"%@,%@,%@",s,tempUnit,zuhe1];
    
    return ss;
}
@end

 
4.展示数据
 把读取出来的数据放到一个界面里面显示 
LinkViewController.h 
//
//  LinkViewController.h
//  LHTempProject
//
//  Created by rnd on 2017/5/2.
//  Copyright © 2017年 GoDream. All rights reserved.
//

#import <UIKit/UIKit.h>

#import "OneView.h"
#import "TwoView.h"
#import "ThreeView.h"
#import "FourView.h"
#import "FiveView.h"
#import "SixView.h"
#import "SevenView.h"
#import "NormalUtil.h"

#import <CoreBluetooth/CoreBluetooth.h>

@interface LinkViewController : UIViewController

@property(nonatomic,strong) CBPeripheral *oneperipheral;

@property(nonatomic,strong) CBPeripheral *twoperipheral;

@property(nonatomic,strong) CBPeripheral *threeperipheral;

@property(nonatomic,strong) CBPeripheral *fourperipheral;

@property(nonatomic,strong) CBPeripheral *fiveperipheral;

@property(nonatomic,strong) CBPeripheral *sexperipheral;

@property(nonatomic,strong) CBPeripheral *sevenperipheral;

//显示温度的数值 关键 切换
@property(nonatomic,strong) UILabel *labelTempOne;

@property(nonatomic,strong) UILabel *labelSymbolOne;

@property(nonatomic,strong) UILabel *labelTempTwo;

@property(nonatomic,strong) UILabel *labelSymbolTwo;

@property(nonatomic,strong) UILabel *labelTempThree;

@property(nonatomic,strong) UILabel *labelSymbolThree;

@property(nonatomic,strong) UILabel *labelTempFour;

@property(nonatomic,strong) UILabel *labelSymbolFour;

@property(nonatomic,strong) UILabel *labelTempFive;

@property(nonatomic,strong) UILabel *labelSymbolFive;

@property(nonatomic,strong) UILabel *labelTempSix;

@property(nonatomic,strong) UILabel *labelSymbolSix;

@property(nonatomic,strong) UILabel *labelTempSeven;

@property(nonatomic,strong) UILabel *labelSymbolSeven;

//两个label
@property(nonatomic,strong) UILabel *labelNameOne;

@property(nonatomic,strong) UILabel *labelAddreOne;

@property(nonatomic,strong) UILabel *labelNameTwo;

@property(nonatomic,strong) UILabel *labelAddreTwo;

@property(nonatomic,strong) UILabel *labelNameThree;

@property(nonatomic,strong) UILabel *labelAddreThree;

@property(nonatomic,strong) UILabel *labelNameFour;

@property(nonatomic,strong) UILabel *labelAddreFour;

@property(nonatomic,strong) UILabel *labelNameFive;

@property(nonatomic,strong) UILabel *labelAddreFive;

@property(nonatomic,strong) UILabel *labelNameSix;

@property(nonatomic,strong) UILabel *labelAddreSix;

@property(nonatomic,strong) UILabel *labelNameSeven;

@property(nonatomic,strong) UILabel *labelAddreSeven;

@property(nonatomic,strong) NormalUtil *normalUtil;

@end

 
LinkViewController.m 
//
//  LinkViewController.m
//  LHTempProject
//
//  Created by rnd on 2017/5/2.
//  Copyright © 2017年 GoDream. All rights reserved.
//

#import "LinkViewController.h"

#ifdef __OBJC__

//define this constant if you want to use Masonry without the 'mas_' prefix
#define MAS_SHORTHAND

//define this constant if you want to enable auto-boxing for default syntax
#define MAS_SHORTHAND_GLOBALS

#import "Masonry.h"

#endif

@interface LinkViewController ()<UIScrollViewDelegate>

@property(nonatomic,strong)OneView *one;
@property(nonatomic,strong)TwoView *two;
@property(nonatomic,strong)ThreeView *three;
@property(nonatomic,strong)FourView *four;
@property(nonatomic,strong)FiveView *five;
@property(nonatomic,strong)SixView *six;
@property(nonatomic,strong)SevenView *seven;

@property(nonatomic,strong)UIScrollView *myscrollview;

@end

@implementation LinkViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    _normalUtil = [NormalUtil sharedManager];
    
    [self setUIView];
    
    [self setValues];
    
    //发现左边外设的服务 （运行到这个方法会进入leftView.m文件中的外围设备服务的代理）
    [self.oneperipheral discoverServices:nil];
    //发现右边外设的服务
    [self.twoperipheral discoverServices:nil];
    
    [self setNotification];
    
}

//初始化值显示
-(void) setValues{
    //_labelTempOne.text = @"No Data";
    _labelTempOne.text = @"Load.";
    _labelTempTwo.text = @"Load.";
    _labelTempThree.text = @"Load.";
    _labelTempFour.text = @"Load.";
    _labelTempFive.text = @"Load.";
    _labelTempSix.text = @"Load.";
    _labelTempSeven.text = @"Load.";
    
    _labelTempOne.textAlignment = NSTextAlignmentCenter;
    _labelTempTwo.textAlignment = NSTextAlignmentCenter;
    _labelTempThree.textAlignment = NSTextAlignmentCenter;
    _labelTempFour.textAlignment = NSTextAlignmentCenter;
    _labelTempFive.textAlignment = NSTextAlignmentCenter;
    _labelTempSix.textAlignment = NSTextAlignmentCenter;
    _labelTempSeven.textAlignment = NSTextAlignmentCenter;
    
    _labelNameOne.text = @"";
    _labelAddreOne.text = @"";
    _labelNameTwo.text = @"";
    _labelAddreTwo.text = @"";
    _labelNameThree.text = @"";
    _labelAddreThree.text = @"";
    _labelNameFour.text = @"";
    _labelAddreFour.text = @"";
    _labelNameFive.text = @"";
    _labelAddreFive.text = @"";
    _labelNameSix.text = @"";
    _labelAddreSix.text = @"";
    _labelNameSeven.text = @"";
    _labelAddreSeven.text = @"";
    
}

//接收通知
-(void)setNotification{
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(tempCompletionOne:) name:@"tempNofictionOne" object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(tempCompletionTwo:) name:@"tempNofictionTwo" object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(tempCompletionThree:) name:@"tempNofictionThree" object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(tempCompletionFour:) name:@"tempNofictionFour" object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(tempCompletionFive:) name:@"tempNofictionFive" object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(tempCompletionSix:) name:@"tempNofictionSix" object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(tempCompletionSeven:) name:@"tempNofictionSeven" object:nil];
}

/*
 接到温度数据的通知
 */
-(void)tempCompletionOne:(NSNotification*)notification{
    NSDictionary *temps = [notification userInfo];
    NSString *all = [temps objectForKey:@"tempOne"];
    NSArray *allarry = [all componentsSeparatedByString:@","];
    _labelTempOne.textAlignment = NSTextAlignmentCenter;
    _labelSymbolOne.textAlignment = NSTextAlignmentCenter;
    //这里面做数据判断
    //int temp = [allarry[0] intValue];
    int normal = [allarry[3] intValue];
    if(normal==0){
        _labelTempOne.text = allarry[0];
    }else if(normal == 1){
        _labelTempOne.text = @"HHH";
    }else if(normal == 2){
        _labelTempOne.text = @"LLL";
    }else{
        _labelTempOne.text = @"NONE";
    }
    _labelSymbolOne.text = allarry[1];
    _labelNameOne.text = allarry[5];
    _labelAddreOne.text = allarry[4];
}

-(void)tempCompletionTwo:(NSNotification*)notification{
    NSDictionary *temps = [notification userInfo];
    NSString *all = [temps objectForKey:@"tempTwo"];
    NSArray *allarry = [all componentsSeparatedByString:@","];
    _labelTempTwo.textAlignment = NSTextAlignmentCenter;
    _labelSymbolTwo.textAlignment = NSTextAlignmentCenter;
    //int a = [allarry[0] intValue];
    int normal = [allarry[3] intValue];
    if(normal==0){
        _labelTempTwo.text = allarry[0];
    }else if(normal == 1){
        _labelTempTwo.text = @"HHH";
    }else if(normal == 2){
        _labelTempTwo.text = @"LLL";
    }else{
        _labelTempTwo.text = @"NONE";
    }
    _labelSymbolTwo.text = allarry[1];
    _labelNameTwo.text = allarry[5];
    _labelAddreTwo.text = allarry[4];
}

-(void)tempCompletionThree:(NSNotification*)notification{
    NSDictionary *temps = [notification userInfo];
    NSString *all = [temps objectForKey:@"tempThree"];
    NSArray *allarry = [all componentsSeparatedByString:@","];
    _labelTempThree.textAlignment = NSTextAlignmentCenter;
    _labelSymbolThree.textAlignment = NSTextAlignmentCenter;
    //int a = [allarry[0] intValue];
    int normal = [allarry[3] intValue];
    if(normal==0){
        _labelTempThree.text = allarry[0];
    }else if(normal == 1){
        _labelTempThree.text = @"HHH";
    }else if(normal == 2){
        _labelTempThree.text = @"LLL";
    }else{
        _labelTempThree.text = @"NONE";
    }
    _labelSymbolThree.text = allarry[1];
    _labelNameThree.text = allarry[5];
    _labelAddreThree.text = allarry[4];
}

-(void)tempCompletionFour:(NSNotification*)notification{
    NSDictionary *temps = [notification userInfo];
    NSString *all = [temps objectForKey:@"tempFour"];
    NSArray *allarry = [all componentsSeparatedByString:@","];
    _labelTempFour.textAlignment = NSTextAlignmentCenter;
    _labelSymbolFour.textAlignment = NSTextAlignmentCenter;
    //int a = [allarry[0] intValue];
    int normal = [allarry[3] intValue];
    if(normal==0){
        _labelTempFour.text = allarry[0];
    }else if(normal == 1){
        _labelTempFour.text = @"HHH";
    }else if(normal == 2){
        _labelTempFour.text = @"LLL";
    }else{
        _labelTempFour.text = @"NONE";
    }
    _labelSymbolFour.text = allarry[1];
    _labelNameFour.text = allarry[5];
    _labelAddreFour.text = allarry[4];
}

-(void)tempCompletionFive:(NSNotification*)notification{
    NSDictionary *temps = [notification userInfo];
    NSString *all = [temps objectForKey:@"tempFive"];
    NSArray *allarry = [all componentsSeparatedByString:@","];
    _labelTempFive.textAlignment = NSTextAlignmentCenter;
    _labelSymbolFive.textAlignment = NSTextAlignmentCenter;
    //int a = [allarry[0] intValue];
    int normal = [allarry[3] intValue];
    if(normal==0){
        _labelTempFive.text = allarry[0];
    }else if(normal == 1){
        _labelTempFive.text = @"HHH";
    }else if(normal == 2){
        _labelTempFive.text = @"LLL";
    }else{
        _labelTempFive.text = @"NONE";
    }
    _labelSymbolFive.text = allarry[1];
    _labelNameFive.text = allarry[5];
    _labelAddreFive.text = allarry[4];
}

-(void)tempCompletionSix:(NSNotification*)notification{
    NSDictionary *temps = [notification userInfo];
    NSString *all = [temps objectForKey:@"tempSix"];
    NSArray *allarry = [all componentsSeparatedByString:@","];
    _labelTempSix.textAlignment = NSTextAlignmentCenter;
    _labelSymbolSix.textAlignment = NSTextAlignmentCenter;
    //int a = [allarry[0] intValue];
    int normal = [allarry[3] intValue];
    if(normal==0){
        _labelTempSix.text = allarry[0];
    }else if(normal == 1){
        _labelTempSix.text = @"HHH";
    }else if(normal == 2){
        _labelTempSix.text = @"LLL";
    }else{
        _labelTempSix.text = @"NONE";
    }
    _labelSymbolSix.text = allarry[1];
    _labelNameSix.text = allarry[5];
    _labelAddreSix.text = allarry[4];
}

-(void)tempCompletionSeven:(NSNotification*)notification{
    NSDictionary *temps = [notification userInfo];
    NSString *all = [temps objectForKey:@"tempSeven"];
    NSArray *allarry = [all componentsSeparatedByString:@","];
    _labelTempSeven.textAlignment = NSTextAlignmentCenter;
    _labelSymbolSeven.textAlignment = NSTextAlignmentCenter;
    //int a = [allarry[0] intValue];
    int normal = [allarry[3] intValue];
    if(normal==0){
        _labelTempSeven.text = allarry[0];
    }else if(normal == 1){
        _labelTempSeven.text = @"HHH";
    }else if(normal == 2){
        _labelTempSeven.text = @"LLL";
    }else{
        _labelTempSeven.text = @"NONE";
    }
    _labelSymbolSeven.text = allarry[1];
    _labelNameSeven.text = allarry[5];
    _labelAddreSeven.text = allarry[4];}

//加载UIView
-(void)setUIView{
    NSString *getpm = [_normalUtil getPingMuWindow];
    
    int a  = [getpm intValue];
    
    _myscrollview = [[UIScrollView alloc] init];
    _myscrollview.delegate = self;
    // 设置内容大小
    _myscrollview.contentSize = CGSizeMake(a, 1100);
    // 提示用户,Indicators flash
    //[UIScrollView flashScrollIndicators];
    // 是否同时运动,lock
    _myscrollview.scrollEnabled = YES;
    
    _myscrollview.directionalLockEnabled = YES;
    
    _myscrollview.backgroundColor = [self stringTOColor:@"#D6D6D6"];
    [self.view addSubview:_myscrollview];
    
    [_myscrollview makeConstraints:^(MASConstraintMaker *make){
        make.left.equalTo(self.view).offset(0);
        make.right.equalTo(self.view).offset(0);
        make.top.equalTo(self.view).offset(0);
        make.bottom.equalTo(self.view).offset(0);
    }];
    
    
    //创建主要的View
    UIView *mainView = [[UIView alloc] init];
    mainView.backgroundColor = [self stringTOColor:@"#D6D6D6"];
    [_myscrollview addSubview:mainView];
    
    //给主view添加约束
    [mainView makeConstraints:^(MASConstraintMaker *make){
        make.edges.equalTo(_myscrollview);
        make.width.equalTo(_myscrollview);
        //make.top.equalTo(_myscrollview).offset(64);
        make.height.equalTo(_myscrollview).multipliedBy(1.5);
    }];
    
    
    /*UIColor *blues = [self stringTOColor:@"#436EEE"];
     
     //创建一个导航栏
     UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, a, 64)];
     //创建一个导航栏集合
     UINavigationItem *navItem = [[UINavigationItem alloc] initWithTitle:@"111"];
     //在这个集合Item中添加标题，按钮
     //style:设置按钮的风格，一共有三种选择
     //action：@selector:设置按钮的点击事件
     //创建一个左边按钮
     UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithTitle:@"< Back" style:UIBarButtonItemStyleDone target:self action:@selector(clickLeftButton)];
     
     //设置导航栏的内容
     [navItem setTitle:@"Display Device"];
     
     //把导航栏集合添加到导航栏中，设置动画关闭
     [navBar pushNavigationItem:navItem animated:NO];
     
     [navBar setBarTintColor:blues];
     
     //[navBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor],UITextAttributeTextColor,nil]];
     
     [navBar setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor whiteColor],
     NSFontAttributeName:[UIFont boldSystemFontOfSize:20]
     }];
     //把左右两个按钮添加到导航栏集合中去
     [navItem setLeftBarButtonItem:leftButton];
     
     [leftButton setTintColor:[UIColor whiteColor]];
     
     //将标题栏中的内容全部添加到主视图当中
     [self.view addSubview:navBar];*/
    
    //添加View头部
    UIView *topView = [UIView new];
    [mainView addSubview:topView];
    
    [topView makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(mainView).offset(0);
        make.left.equalTo(mainView).offset(0);
        make.right.equalTo(mainView).offset(0);
        make.height.equalTo(@0);
    }];
    
    
    //添加第一个显示温度view
    _one = [[OneView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 100)];
    
    _one.backgroundColor = [UIColor whiteColor];
    [mainView addSubview:_one];
    
    _oneperipheral.delegate = _one;
    
    //添加里面的布局模式
    //UIColor *bgColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"circle.png"]];
    
    UIView *c1 = [[UIView alloc] init];
    
    [_one addSubview:c1];
    
    [c1 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_one).offset(10);
        make.left.equalTo(_one).offset(35);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    UIImageView *circle1 = [[UIImageView alloc] init];
    circle1.image = [UIImage imageNamed:@"circle.png"];
    //[circle1 setBackgroundColor:bgColor];
    
    [_one addSubview:circle1];
    
    [circle1 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c1).offset(0);
        make.left.equalTo(c1).offset(0);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    _labelTempOne = [[UILabel alloc] init];
    
    [circle1 addSubview:_labelTempOne];
    
    [_labelTempOne makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c1).offset(15);
        make.centerX.equalTo(c1);
        make.width.equalTo(@80);
        make.height.equalTo(@30);
    }];
    
    _labelSymbolOne = [[UILabel alloc] init];
    
    [circle1 addSubview:_labelSymbolOne];
    
    [_labelSymbolOne makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_labelTempOne).offset(25);
        make.centerX.equalTo(c1);
        make.width.equalTo(@80);
        make.height.equalTo(@25);
    }];
    
    //添加第一个2个label
    _labelNameOne  = [[UILabel alloc] init];
    _labelNameOne.text = @"";
    _labelNameOne.textColor = [UIColor blackColor];
    
    //设置字体的大小
    [_one addSubview:_labelNameOne];
    
    [_labelNameOne makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_one).offset(20);
        make.left.equalTo(_one).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    _labelAddreOne = [[UILabel alloc] init];
    _labelAddreOne.text = @"";
    _labelAddreOne.textColor = [UIColor blackColor];
    [_one addSubview:_labelAddreOne];
    
    [_labelAddreOne makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_one).offset(50);
        make.left.equalTo(_one).offset(130);
        make.width.equalTo(@200);
        make.height.equalTo(@30);
    }];
    
    
    //添加第二个view
    _two = [[TwoView alloc]initWithFrame:CGRectMake(0, 101, [UIScreen mainScreen].bounds.size.width, 100)];
    
    _two.backgroundColor = [UIColor whiteColor];
    [mainView addSubview:_two];
    
    _twoperipheral.delegate = _two;
    
    UIView *c2 = [[UIView alloc] init];
    
    [_two addSubview:c2];
    
    [c2 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_two).offset(10);
        make.left.equalTo(_two).offset(35);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    UIImageView *circle2 = [[UIImageView alloc] init];
    circle2.image = [UIImage imageNamed:@"circle.png"];
    //[circle1 setBackgroundColor:bgColor];
    
    [c2 addSubview:circle2];
    
    [circle2 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c2).offset(0);
        make.left.equalTo(c2).offset(0);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    _labelTempTwo = [[UILabel alloc] init];
    
    [c2 addSubview:_labelTempTwo];
    
    [_labelTempTwo makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c2).offset(15);
        make.centerX.equalTo(c2);
        make.width.equalTo(@80);
        make.height.equalTo(@30);
    }];
    
    _labelSymbolTwo = [[UILabel alloc] init];
    
    [c2 addSubview:_labelSymbolTwo];
    
    [_labelSymbolTwo makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_labelTempTwo).offset(25);
        make.centerX.equalTo(c2);
        make.width.equalTo(@80);
        make.height.equalTo(@25);
    }];
    
    //添加第一个2个label
    _labelNameTwo  = [[UILabel alloc] init];
    _labelNameTwo.text = @"";
    _labelNameTwo.textColor = [UIColor blackColor];
    [_two addSubview:_labelNameTwo];
    
    [_labelNameTwo makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_two).offset(20);
        make.left.equalTo(_two).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    _labelAddreTwo = [[UILabel alloc] init];
    _labelAddreTwo.text = @"";
    _labelAddreTwo.textColor = [UIColor blackColor];
    [_two addSubview:_labelAddreTwo];
    
    [_labelAddreTwo makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_two).offset(50);
        make.left.equalTo(_two).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    //添加第三个view
    _three = [[ThreeView alloc]initWithFrame:CGRectMake(0, 202, [UIScreen mainScreen].bounds.size.width, 100)];
    
    _three.backgroundColor = [UIColor whiteColor];
    [mainView addSubview:_three];
    
    _threeperipheral.delegate = _three;
    
    UIView *c3 = [[UIView alloc] init];
    
    [_three addSubview:c3];
    
    [c3 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_three).offset(10);
        make.left.equalTo(_three).offset(35);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    UIImageView *circle3 = [[UIImageView alloc] init];
    circle3.image = [UIImage imageNamed:@"circle.png"];
    //[circle1 setBackgroundColor:bgColor];
    
    [c3 addSubview:circle3];
    
    [circle3 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c3).offset(0);
        make.left.equalTo(c3).offset(0);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    _labelTempThree = [[UILabel alloc] init];
    
    [c3 addSubview:_labelTempThree];
    
    [_labelTempThree makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c3).offset(15);
        make.centerX.equalTo(c3);
        make.width.equalTo(@80);
        make.height.equalTo(@30);
    }];
    
    _labelSymbolThree = [[UILabel alloc] init];
    
    [c3 addSubview:_labelSymbolThree];
    
    [_labelSymbolThree makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_labelTempThree).offset(25);
        make.centerX.equalTo(c3);
        make.width.equalTo(@80);
        make.height.equalTo(@25);
    }];
    
    //添加第一个2个label
    _labelNameThree  = [[UILabel alloc] init];
    _labelNameThree.text = @"";
    _labelNameThree.textColor = [UIColor blackColor];
    [_three addSubview:_labelNameThree];
    
    [_labelNameThree makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_three).offset(20);
        make.left.equalTo(_three).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    _labelAddreThree = [[UILabel alloc] init];
    _labelAddreThree.text = @"";
    _labelAddreThree.textColor = [UIColor blackColor];
    [_three addSubview:_labelAddreThree];
    
    [_labelAddreThree makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_three).offset(50);
        make.left.equalTo(_three).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    //添加第4个view
    _four = [[FourView alloc]initWithFrame:CGRectMake(0, 303, [UIScreen mainScreen].bounds.size.width, 100)];
    
    _four.backgroundColor = [UIColor whiteColor];
    [mainView addSubview:_four];
    _fourperipheral.delegate = _four;
    UIView *c4 = [[UIView alloc] init];
    [_four addSubview:c4];
    [c4 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_four).offset(10);
        make.left.equalTo(_four).offset(35);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    UIImageView *circle4 = [[UIImageView alloc] init];
    circle4.image = [UIImage imageNamed:@"circle.png"];
    //[circle1 setBackgroundColor:bgColor];
    
    [c4 addSubview:circle4];
    
    [circle4 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c4).offset(0);
        make.left.equalTo(c4).offset(0);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    _labelTempFour = [[UILabel alloc] init];
    
    [c4 addSubview:_labelTempFour];
    
    [_labelTempFour makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c4).offset(15);
        make.centerX.equalTo(c4);
        make.width.equalTo(@80);
        make.height.equalTo(@30);
    }];
    
    _labelSymbolFour = [[UILabel alloc] init];
    
    [c4 addSubview:_labelSymbolFour];
    
    [_labelSymbolFour makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_labelTempFour).offset(25);
        make.centerX.equalTo(c4);
        make.width.equalTo(@80);
        make.height.equalTo(@25);
    }];
    
    //添加第一个2个label
    _labelNameFour  = [[UILabel alloc] init];
    _labelNameFour.text = @"";
    _labelNameFour.textColor = [UIColor blackColor];
    [_four addSubview:_labelNameFour];
    
    [_labelNameFour makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_four).offset(20);
        make.left.equalTo(_four).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    _labelAddreFour = [[UILabel alloc] init];
    _labelAddreFour.text = @"";
    _labelAddreFour.textColor = [UIColor blackColor];
    [_four addSubview:_labelAddreFour];
    
    [_labelAddreFour makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_four).offset(50);
        make.left.equalTo(_four).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    
    //添加第5个view
    _five = [[FiveView alloc]initWithFrame:CGRectMake(0, 404, [UIScreen mainScreen].bounds.size.width, 100)];
    
    _five.backgroundColor = [UIColor whiteColor];
    [mainView addSubview:_five];
    _fiveperipheral.delegate = _five;
    UIView *c5 = [[UIView alloc] init];
    [_five addSubview:c5];
    [c5 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_five).offset(10);
        make.left.equalTo(_five).offset(35);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    UIImageView *circle5 = [[UIImageView alloc] init];
    circle5.image = [UIImage imageNamed:@"circle.png"];
    //[circle1 setBackgroundColor:bgColor];
    
    [c5 addSubview:circle5];
    
    [circle5 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c5).offset(0);
        make.left.equalTo(c5).offset(0);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    _labelTempFive = [[UILabel alloc] init];
    
    [c5 addSubview:_labelTempFive];
    
    [_labelTempFive makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c5).offset(15);
        make.centerX.equalTo(c5);
        make.width.equalTo(@80);
        make.height.equalTo(@30);
    }];
    
    _labelSymbolFive = [[UILabel alloc] init];
    
    [c5 addSubview:_labelSymbolFive];
    
    [_labelSymbolFive makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_labelTempFive).offset(25);
        make.centerX.equalTo(c4);
        make.width.equalTo(@80);
        make.height.equalTo(@25);
    }];
    
    //添加第一个2个label
    _labelNameFive  = [[UILabel alloc] init];
    _labelNameFive.text = @"";
    _labelNameFive.textColor = [UIColor blackColor];
    [_five addSubview:_labelNameFive];
    
    [_labelNameFive makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_five).offset(20);
        make.left.equalTo(_five).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    _labelAddreFive = [[UILabel alloc] init];
    _labelAddreFive.text = @"";
    _labelAddreFive.textColor = [UIColor blackColor];
    [_five addSubview:_labelAddreFive];
    
    [_labelAddreFive makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_five).offset(50);
        make.left.equalTo(_five).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    
    //第六个view
    _six = [[SixView alloc]initWithFrame:CGRectMake(0, 505, [UIScreen mainScreen].bounds.size.width, 100)];
    
    _six.backgroundColor = [UIColor whiteColor];
    [mainView addSubview:_six];
    _sexperipheral.delegate = _six;
    UIView *c6 = [[UIView alloc] init];
    [_six addSubview:c6];
    [c6 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_six).offset(10);
        make.left.equalTo(_six).offset(35);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    UIImageView *circle6 = [[UIImageView alloc] init];
    circle6.image = [UIImage imageNamed:@"circle.png"];
    //[circle1 setBackgroundColor:bgColor];
    
    [c6 addSubview:circle6];
    
    [circle6 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c6).offset(0);
        make.left.equalTo(c6).offset(0);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    _labelTempSix = [[UILabel alloc] init];
    
    [c6 addSubview:_labelTempSix];
    
    [_labelTempSix makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c6).offset(15);
        make.centerX.equalTo(c6);
        make.width.equalTo(@80);
        make.height.equalTo(@30);
    }];
    
    _labelSymbolSix = [[UILabel alloc] init];
    
    [c6 addSubview:_labelSymbolSix];
    
    [_labelSymbolSix makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_labelTempSix).offset(25);
        make.centerX.equalTo(c6);
        make.width.equalTo(@80);
        make.height.equalTo(@25);
    }];
    
    //添加第一个2个label
    _labelNameSix  = [[UILabel alloc] init];
    _labelNameSix.text = @"";
    _labelNameSix.textColor = [UIColor blackColor];
    [_six addSubview:_labelNameSix];
    
    [_labelNameSix makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_six).offset(20);
        make.left.equalTo(_six).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    _labelAddreSix = [[UILabel alloc] init];
    _labelAddreSix.text = @"";
    _labelAddreSix.textColor = [UIColor blackColor];
    [_six addSubview:_labelAddreSix];
    
    [_labelAddreSix makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_six).offset(50);
        make.left.equalTo(_six).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    
    //第7个view
    _seven = [[SevenView alloc]initWithFrame:CGRectMake(0, 606, [UIScreen mainScreen].bounds.size.width, 100)];
    
    _seven.backgroundColor = [UIColor whiteColor];
    [mainView addSubview:_seven];
    _sevenperipheral.delegate = _seven;
    UIView *c7 = [[UIView alloc] init];
    [_seven addSubview:c7];
    [c7 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_seven).offset(10);
        make.left.equalTo(_seven).offset(35);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    UIImageView *circle7 = [[UIImageView alloc] init];
    circle7.image = [UIImage imageNamed:@"circle.png"];
    //[circle1 setBackgroundColor:bgColor];
    
    [c7 addSubview:circle7];
    
    [circle7 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c7).offset(0);
        make.left.equalTo(c7).offset(0);
        make.width.equalTo(@80);
        make.height.equalTo(@80);
    }];
    
    _labelTempSeven = [[UILabel alloc] init];
    
    [c7 addSubview:_labelTempSeven];
    
    [_labelTempSeven makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(c7).offset(15);
        make.centerX.equalTo(c7);
        make.width.equalTo(@80);
        make.height.equalTo(@30);
    }];
    
    _labelSymbolSeven = [[UILabel alloc] init];
    
    [c7 addSubview:_labelSymbolSeven];
    
    [_labelSymbolSeven makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_labelTempSeven).offset(25);
        make.centerX.equalTo(c6);
        make.width.equalTo(@80);
        make.height.equalTo(@25);
    }];
    
    //添加第一个2个label
    _labelNameSeven  = [[UILabel alloc] init];
    _labelNameSeven.text = @"";
    _labelNameSeven.textColor = [UIColor blackColor];
    [_seven addSubview:_labelNameSeven];
    
    [_labelNameSeven makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_seven).offset(20);
        make.left.equalTo(_seven).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    _labelAddreSeven = [[UILabel alloc] init];
    _labelAddreSeven.text = @"";
    _labelAddreSeven.textColor = [UIColor blackColor];
    [_seven addSubview:_labelAddreSeven];
    
    [_labelAddreSeven makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(_seven).offset(50);
        make.left.equalTo(_seven).offset(130);
        make.width.equalTo(@100);
        make.height.equalTo(@30);
    }];
    
    
    //备用一个
    UIView *cys8 = [[UIView alloc] init];
    cys8.backgroundColor = [UIColor whiteColor];
    [mainView addSubview:cys8];
    
    [cys8 makeConstraints:^(MASConstraintMaker *make){
        make.top.equalTo(mainView).offset(707);
        make.left.equalTo(mainView).offset(0);
        make.right.equalTo(mainView).offset(0);
        make.bottom.equalTo(mainView).offset(0);
    }];
    
}

-(void)clickLeftButton{
    [self dismissViewControllerAnimated:YES completion:nil];
}


- (BOOL)navigationShouldPopOnBackButton{
    [self dismissViewControllerAnimated:YES completion:nil];
    return YES;
}

/*
 * 字符串转为颜色值
 */
- (UIColor *) stringTOColor:(NSString *)str
{
    if (!str || [str isEqualToString:@""]) {
        return nil;
    }
    unsigned red,green,blue;
    NSRange range;
    range.length = 2;
    range.location = 1;
    [[NSScanner scannerWithString:[str substringWithRange:range]] scanHexInt:&red];
    range.location = 3;
    [[NSScanner scannerWithString:[str substringWithRange:range]] scanHexInt:&green];
    range.location = 5;
    [[NSScanner scannerWithString:[str substringWithRange:range]] scanHexInt:&blue];
    UIColor *color= [UIColor colorWithRed:red/255.0f green:green/255.0f blue:blue/255.0f alpha:1];
    return color;
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    
}

// 是否支持滑动至顶部
- (BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView
{
    return YES;
}

@end

 
上面的代码 我用的是通过 接收到蓝牙的通知来 更新温度数据的显示。 
上面这个版本写的太low了 如果你想要更高级的连接方式请查看 
https://github.com/QuickDevelopers/BleManageSwift 
这个库我一直会维护 
源码如下： 
http://download.csdn.net/download/a1989214/9968056

收起

BluetoothChat手机与串口模块通信靠近自动连接2.0apk示例：链接: https://pan.baidu.com/s/1YoMNNBfLTAuXm2XukG5s9g 提取码: sm3h 
  
全球首创的新技术。小黄人独家推出基于bluetoothchat的，手机靠近蓝牙模块自动连接蓝牙模块，断后自动重连，多设备自由切换，记忆连接，可后台运行。连接成功率百分之百。可以应用在工业通讯，手机游戏，自动解锁等领域。也可以手机靠近手机自动连接，换UUID即可。欢迎定制。 
1.初次连接要配对。 
2.蓝牙未打开会提示打开。这个也可以设为自动打开，得延时，一般5秒，且返回值不知什么时候返回，所以不用这种方法，以前老版本是用这个方法。 
3.各状态都有提示。连接成功，断开，丢失，无法连接等。 
4.按返回键，可后台运行。 
5.在有效范围内自动连接，断后自动重连。 
可选的定制功能有：十六进制/字符切换发送与接收，按键名与命令自定义，界面，保存，接收处理，通信协议自定义。 
有问题请留言。 
--------by 小黄人软件 
BluetoothChatService.java源码： 
  
/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.BluetoothChat;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

/**
 * This class does all the work for setting up and managing Bluetooth
 * connections with other devices. It has a thread that listens for
 * incoming connections, a thread for connecting with a device, and a
 * thread for performing data transmissions when connected.
 */
public class BluetoothChatService {
    // Debugging
    private static final String TAG = "BluetoothChatService";
    private static final boolean D = true;

    // Name for the SDP record when creating server socket
    private static final String NAME = "BluetoothChat";

    // Unique UUID for this application
						 				
//	private static final UUID MY_UUID = UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66");
	private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");//¥Æø⁄  	

    // Member fields
    private final BluetoothAdapter mAdapter;
    private final Handler mHandler;
    private AcceptThread mAcceptThread;
    private ConnectThread mConnectThread;
    private ConnectedThread mConnectedThread;
    private int mState;

    // Constants that indicate the current connection state
    public static final int STATE_NONE = 0;       // we're doing nothing
    public static final int STATE_LISTEN = 1;     // now listening for incoming connections
    public static final int STATE_CONNECTING = 2; // now initiating an outgoing connection
    public static final int STATE_CONNECTED = 3;  // now connected to a remote device

    /**
     * Constructor. Prepares a new BluetoothChat session.
     * @param context  The UI Activity Context
     * @param handler  A Handler to send messages back to the UI Activity
     */
    public BluetoothChatService(Context context, Handler handler) {
        mAdapter = BluetoothAdapter.getDefaultAdapter();
        mState = STATE_NONE;
        mHandler = handler;
    }

    /**
     * Set the current state of the chat connection
     * @param state  An integer defining the current connection state
     */
    private synchronized void setState(int state) {
        if (D) Log.d(TAG, "setState() " + mState + " -> " + state);
        mState = state;

        // Give the new state to the Handler so the UI Activity can update
        mHandler.obtainMessage(BluetoothChat.MESSAGE_STATE_CHANGE, state, -1).sendToTarget();
    }

    /**
     * Return the current connection state. */
    public synchronized int getState() {
        return mState;
    }

    /**
     * Start the chat service. Specifically start AcceptThread to begin a
     * session in listening (server) mode. Called by the Activity onResume() */
    public synchronized void start() {
        if (D) Log.d(TAG, "start");

        // Cancel any thread attempting to make a connection
        if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;}

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;}

        // Start the thread to listen on a BluetoothServerSocket
        if (mAcceptThread == null) {
            mAcceptThread = new AcceptThread();
            mAcceptThread.start();
        }
        setState(STATE_LISTEN);
    }

    /**
     * Start the ConnectThread to initiate a connection to a remote device.
     * @param device  The BluetoothDevice to connect
     */
    public synchronized void connect(BluetoothDevice device) {
        if (D) Log.d(TAG, "connect to: " + device);

        // Cancel any thread attempting to make a connection
        if (mState == STATE_CONNECTING) {
            if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;}
        }

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;}

        // Start the thread to connect with the given device
        mConnectThread = new ConnectThread(device);
        mConnectThread.start();
        setState(STATE_CONNECTING);
    }

    /**
     * Start the ConnectedThread to begin managing a Bluetooth connection
     * @param socket  The BluetoothSocket on which the connection was made
     * @param device  The BluetoothDevice that has been connected
     */
    public synchronized void connected(BluetoothSocket socket, BluetoothDevice device) {
        if (D) Log.d(TAG, "connected");

        // Cancel the thread that completed the connection
        if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;}

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;}

        // Cancel the accept thread because we only want to connect to one device
        if (mAcceptThread != null) {mAcceptThread.cancel(); mAcceptThread = null;}

        // Start the thread to manage the connection and perform transmissions
        mConnectedThread = new ConnectedThread(socket);
        mConnectedThread.start();

        // Send the name of the connected device back to the UI Activity
        Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_DEVICE_NAME);
        Bundle bundle = new Bundle();
        bundle.putString(BluetoothChat.DEVICE_NAME, device.getName());
        bundle.putString(BluetoothChat.DEVICE_ADDRESS, device.getAddress());
        msg.setData(bundle);
        mHandler.sendMessage(msg);

        setState(STATE_CONNECTED);
    }

    /**
     * Stop all threads
     */
    public synchronized void stop() {
        if (D) Log.d(TAG, "stop");
        if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;}
        if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;}
        if (mAcceptThread != null) {mAcceptThread.cancel(); mAcceptThread = null;}
        setState(STATE_NONE);
    }

    /**
     * Write to the ConnectedThread in an unsynchronized manner
     * @param out The bytes to write
     * @see ConnectedThread#write(byte[])
     */
    public void write(byte[] out) {
        // Create temporary object
        ConnectedThread r;
        // Synchronize a copy of the ConnectedThread
        synchronized (this) {
            if (mState != STATE_CONNECTED) return;
            r = mConnectedThread;
        }
        // Perform the write unsynchronized
        r.write(out);
    }

    /**
     * Indicate that the connection attempt failed and notify the UI Activity.
     */
    private void connectionFailed() {
        setState(STATE_LISTEN);

        // Send a failure message back to the Activity
        Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_TOAST);
        Bundle bundle = new Bundle();
        bundle.putString(BluetoothChat.TOAST, "Unable to connect device");
        msg.setData(bundle);
        mHandler.sendMessage(msg);
    }

    /**
     * Indicate that the connection was lost and notify the UI Activity.
     */
    private void connectionLost() {
        setState(STATE_LISTEN);

        // Send a failure message back to the Activity
        Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_TOAST);
        Bundle bundle = new Bundle();
        bundle.putString(BluetoothChat.TOAST, "Device connection was lost");
        msg.setData(bundle);
        mHandler.sendMessage(msg);
    }

    /**
     * This thread runs while listening for incoming connections. It behaves
     * like a server-side client. It runs until a connection is accepted
     * (or until cancelled).
     */
    private class AcceptThread extends Thread {
        // The local server socket
        private final BluetoothServerSocket mmServerSocket;

        public AcceptThread() {
            BluetoothServerSocket tmp = null;

            // Create a new listening server socket
            try {
                tmp = mAdapter.listenUsingRfcommWithServiceRecord(NAME, MY_UUID);
            } catch (IOException e) {
                Log.e(TAG, "listen() failed", e);
            }
            mmServerSocket = tmp;
        }

        public void run() {
            if (D) Log.d(TAG, "BEGIN mAcceptThread" + this);
            setName("AcceptThread");
            BluetoothSocket socket = null;

            // Listen to the server socket if we're not connected
            while (mState != STATE_CONNECTED) {
                try {
                    // This is a blocking call and will only return on a
                    // successful connection or an exception
                    socket = mmServerSocket.accept();
                } catch (IOException e) {
                    Log.e(TAG, "accept() failed", e);
                    break;
                }

                // If a connection was accepted
                if (socket != null) {
                    synchronized (BluetoothChatService.this) {
                        switch (mState) {
                        case STATE_LISTEN:
                        case STATE_CONNECTING:
                            // Situation normal. Start the connected thread.
                            connected(socket, socket.getRemoteDevice());
                            break;
                        case STATE_NONE:
                        case STATE_CONNECTED:
                            // Either not ready or already connected. Terminate new socket.
                            try {
                                socket.close();
                            } catch (IOException e) {
                                Log.e(TAG, "Could not close unwanted socket", e);
                            }
                            break;
                        }
                    }
                }
            }
            if (D) Log.i(TAG, "END mAcceptThread");
        }

        public void cancel() {
            if (D) Log.d(TAG, "cancel " + this);
            try {
                mmServerSocket.close();
            } catch (IOException e) {
                Log.e(TAG, "close() of server failed", e);
            }
        }
    }


    /**
     * This thread runs while attempting to make an outgoing connection
     * with a device. It runs straight through; the connection either
     * succeeds or fails.
     */
    private class ConnectThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final BluetoothDevice mmDevice;

        public ConnectThread(BluetoothDevice device) {
            mmDevice = device;
            BluetoothSocket tmp = null;

            // Get a BluetoothSocket for a connection with the
            // given BluetoothDevice
            try {
                tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
            } catch (IOException e) {
                Log.e(TAG, "create() failed", e);
            }
            mmSocket = tmp;
        }

        public void run() {
            Log.i(TAG, "BEGIN mConnectThread");
            setName("ConnectThread");

            // Always cancel discovery because it will slow down a connection
            mAdapter.cancelDiscovery();

            // Make a connection to the BluetoothSocket
            try {
                // This is a blocking call and will only return on a
                // successful connection or an exception
                mmSocket.connect();
            } catch (IOException e) {
                connectionFailed();
                // Close the socket
                try {
                    mmSocket.close();
                } catch (IOException e2) {
                    Log.e(TAG, "unable to close() socket during connection failure", e2);
                }
                // Start the service over to restart listening mode
                BluetoothChatService.this.start();
                return;
            }

            // Reset the ConnectThread because we're done
            synchronized (BluetoothChatService.this) {
                mConnectThread = null;
            }

            // Start the connected thread
            connected(mmSocket, mmDevice);
        }

        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) {
                Log.e(TAG, "close() of connect socket failed", e);
            }
        }
    }

    /**
     * This thread runs during a connection with a remote device.
     * It handles all incoming and outgoing transmissions.
     */
    private class ConnectedThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final InputStream mmInStream;
        private final OutputStream mmOutStream;

        public ConnectedThread(BluetoothSocket socket) {
            Log.d(TAG, "create ConnectedThread");
            mmSocket = socket;
            InputStream tmpIn = null;
            OutputStream tmpOut = null;

            // Get the BluetoothSocket input and output streams
            try {
                tmpIn = socket.getInputStream();
                tmpOut = socket.getOutputStream();
            } catch (IOException e) {
                Log.e(TAG, "temp sockets not created", e);
            }

            mmInStream = tmpIn;
            mmOutStream = tmpOut;
        }

        public void run() {
            Log.i(TAG, "BEGIN mConnectedThread");
            byte[] buffer = new byte[1024];
            int bytes;

            // Keep listening to the InputStream while connected
            while (true) {
                try {
                    // Read from the InputStream
                    bytes = mmInStream.read(buffer);

                    // Send the obtained bytes to the UI Activity
                    mHandler.obtainMessage(BluetoothChat.MESSAGE_READ, bytes, -1, buffer)
                            .sendToTarget();
                } catch (IOException e) {
                    Log.e(TAG, "disconnected", e);
                    connectionLost();
                    break;
                }
            }
        }

        /**
         * Write to the connected OutStream.
         * @param buffer  The bytes to write
         */
        public void write(byte[] buffer) {
            try {
                mmOutStream.write(buffer);

                // Share the sent message back to the UI Activity
                mHandler.obtainMessage(BluetoothChat.MESSAGE_WRITE, -1, -1, buffer)
                        .sendToTarget();
            } catch (IOException e) {
                Log.e(TAG, "Exception during write", e);
            }
        }

        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) {
                Log.e(TAG, "close() of connect socket failed", e);
            }
        }
    }
}

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