蓝牙硬件交互数据传输Demo
2024-09-06 11:18:47
#import "ViewController.h"
#import <CoreBluetooth/CoreBluetooth.h> @interface ViewController ()<CBCentralManagerDelegate,CBPeripheralDelegate>
/// 中央管理者 -->管理设备的扫描 --连接
@property (nonatomic, strong) CBCentralManager *centralManager;
// 存储的设备
@property (nonatomic, strong) NSMutableArray *peripherals;
// 扫描到的设备
@property (nonatomic, strong) CBPeripheral *cbPeripheral;
// 文本
@property (weak, nonatomic) IBOutlet UITextView *peripheralText;
// 蓝牙状态
@property (nonatomic, assign) CBManagerState peripheralState; @end // 蓝牙4.0设备名
static NSString * const kBlePeripheralName = @"apple";
// 通知服务
static NSString * const kNotifyServerUUID = @"FFE0";
// 写服务
static NSString * const kWriteServerUUID = @"FFE1";
// 通知特征值
static NSString * const kNotifyCharacteristicUUID = @"FFE2";
// 写特征值
static NSString * const kWriteCharacteristicUUID = @"FFE1"; @implementation ViewController
- (NSMutableArray *)peripherals
{
if (!_peripherals) {
_peripherals = [NSMutableArray array];
}
return _peripherals;
} - (CBCentralManager *)centralManager
{
if (!_centralManager)
{
_centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
}
return _centralManager;
} // 222 扫描设备
- (IBAction)scanForPeripherals
{
[self.centralManager stopScan];
NSLog(@"扫描设备");
[self showMessage:@"扫描设备"];
if (self.peripheralState == CBManagerStatePoweredOn)
{
[self.centralManager scanForPeripheralsWithServices:nil options:nil];
}
} // 连接设备
- (IBAction)connectToPeripheral
{
if (self.cbPeripheral != nil)
{
NSLog(@"连接设备");
[self showMessage:@"连接设备"];
[self.centralManager connectPeripheral:self.cbPeripheral options:nil];
}
else
{
[self showMessage:@"无设备可连接"];
}
} // 清空设备
- (IBAction)clearPeripherals
{
NSLog(@"清空设备");
[self.peripherals removeAllObjects];
self.peripheralText.text = @"";
[self showMessage:@"清空设备"]; if (self.cbPeripheral != nil)
{
// 取消连接
NSLog(@"取消连接");
[self showMessage:@"取消连接"];
[self.centralManager cancelPeripheralConnection:self.cbPeripheral];
}
}
//
- (void)viewDidLoad {
[super viewDidLoad];
[self centralManager];
}
///
//只要中心管理者初始化 就会触发此代理方法 判断手机蓝牙状态 状态更新时调用
- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
switch (central.state) {
case CBManagerStateUnknown:{
NSLog(@"为知状态");
self.peripheralState = central.state;
}
break;
case CBManagerStateResetting:
{
NSLog(@"重置状态");
self.peripheralState = central.state;
}
break;
case CBManagerStateUnsupported:
{
NSLog(@"不支持的状态");
self.peripheralState = central.state;
}
break;
case CBManagerStateUnauthorized:
{
NSLog(@"未授权的状态");
self.peripheralState = central.state;
}
break;
case CBManagerStatePoweredOff:
{
NSLog(@"关闭状态");
self.peripheralState = central.state;
}
break;
case CBManagerStatePoweredOn:
{
NSLog(@"开启状态－可用状态");
self.peripheralState = central.state;
// 链接成功开始扫描设备
[self scanForPeripherals];
NSLog(@"%ld",(long)self.peripheralState);
}
break;
default:
break;
}
}
/**
333扫描到设备 发现设备是开启状态后调用方法 @param central 中心管理者
@param peripheral 扫描到的设备
@param advertisementData 广告信息
@param RSSI 信号强度
*/
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI
{
[self showMessage:[NSString stringWithFormat:@"发现设备,设备名:%@",peripheral.name]];
// 设备数组中是否存在 该设备
if (![self.peripherals containsObject:peripheral])
{
[self.peripherals addObject:peripheral];
NSLog(@"%@",peripheral); [self showMessage:[NSString stringWithFormat:@"设备名:%@",peripheral.name]]; //最常用的场景是查找某一个前缀开头的设备
// if ([peripheral.name hasPrefix:@"JDY"] ) {
[self showMessage:@"开始连接"];
[self.centralManager connectPeripheral:peripheral options:nil];
// }
}
} /**
连接失败 @param central 中心管理者
@param peripheral 连接失败的设备
@param error 错误信息
*/ - (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
[self showMessage:@"连接失败"];
if ([peripheral.name isEqualToString:kBlePeripheralName])
{
[self.centralManager connectPeripheral:peripheral options:nil];
}
} /**
连接断开 @param central 中心管理者
@param peripheral 连接断开的设备
@param error 错误信息
*/ - (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
[self showMessage:@"断开连接"];
if ([peripheral.name isEqualToString:kBlePeripheralName])
{
[self.centralManager connectPeripheral:peripheral options:nil];
}
} /**
444连接成功 @param central 中心管理者
@param peripheral 连接成功的设备
*/
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
NSLog(@"连接设备:%@成功",peripheral.name);
// self.peripheralText.text = [NSString stringWithFormat:@"连接设备:%@成功",peripheral.name];
[self showMessage:[NSString stringWithFormat:@"连接设备:%@成功",peripheral.name]];
// 设备
self.cbPeripheral = peripheral;
// 设置设备的代理
peripheral.delegate = self;
// services:传入nil 代表扫描所有服务
[peripheral discoverServices:nil];
} /**
555扫描到服务 @param peripheral 服务对应的设备
@param error 扫描错误信息
*/
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
{
// 遍历所有的服务
for (CBService *service in peripheral.services)
{
NSLog(@"服务:%@",service.UUID.UUIDString);
// 获取对应的服务
if ([service.UUID.UUIDString isEqualToString:kWriteServerUUID] || [service.UUID.UUIDString isEqualToString:kNotifyServerUUID])
{
// 根据服务去扫描特征
[peripheral discoverCharacteristics:nil forService:service];
}
}
} /**
666扫描到对应的特征 @param peripheral 设备
@param service 特征对应的服务
@param error 错误信息
*/
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{
// 遍历所有的特征
for (CBCharacteristic *characteristic in service.characteristics)
{ NSLog(@"特征值:%@",characteristic.UUID.UUIDString);
if ([characteristic.UUID.UUIDString isEqualToString:kNotifyCharacteristicUUID])
{
// 写入数据 M_1_1000_\r
NSString *testString = [NSString stringWithFormat:@"%@",@"M_1_1000_\r"];
NSData *data = [testString dataUsingEncoding: NSUTF8StringEncoding]; // NSData *data = [self hexToBytes:testString];
// Byte byte[] = {0xf0, 0x3d, 0x3d, 0x5d,0x02,0xf7};
// NSData *data = [NSData dataWithBytes:byte length:6];
[self.cbPeripheral writeValue:data forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse];
[self showMessage:@"写入特征值"]; // for (Byte i = 0x0; i < 0x73; i++)
// {
// Byte byte[] = {0xf0, 0x3d, 0x3d, i,
// 0x02,0xf7};
// NSData *data = [NSData dataWithBytes:byte length:6];
// [peripheral writeValue:data forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse];
// }
}
if ([characteristic.UUID.UUIDString isEqualToString:kNotifyCharacteristicUUID])
{
[peripheral setNotifyValue:YES forCharacteristic:characteristic];
}
}
} - (void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error;
{
//这个方法比较好，这个是你发数据到外设的某一个特征值上面，并且响应的类型是 CBCharacteristicWriteWithResponse ，上面的官方文档也有，如果确定发送到外设了，就会给你一个回应，当然，这个也是要看外设那边的特征值UUID的属性是怎么设置的,看官方文档，人家已经说了，条件是，特征值UUID的属性：CBCharacteristicWriteWithResponse
if (!error) {
NSLog(@"说明发送成功，characteristic.uuid为：%@ 发送为%@",[characteristic.UUID UUIDString],characteristic.value);
Byte byte2[] = {0xf0, 0x3d, 0x3d, 0x5d,0x02,0xf7};
NSData* data2 = [[NSData alloc] initWithBytes:byte2 length:];
if ([characteristic.value isEqualToData:data2]) {
NSLog(@"说明发送成功，characteristic.uuid为：%@ 发送为%@",[characteristic.UUID UUIDString],characteristic.value);
}
}else{
NSLog(@"发送失败了啊！characteristic.uuid为：%@ 原因:%@",[characteristic.UUID UUIDString],error); }
//调用下面的方法后 会调用到代理的- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
[peripheral readValueForCharacteristic:characteristic];
} /**
根据特征读到数据 @param peripheral 读取到数据对应的设备
@param characteristic 特征
@param error 错误信息
*/
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(nonnull CBCharacteristic *)characteristic error:(nullable NSError *)error
{
if ([characteristic.UUID.UUIDString isEqualToString:kNotifyCharacteristicUUID])
{
NSData *data = characteristic.value;
NSLog(@"%@",data);
// 2017-04-25 12:34:41.876974+0800 蓝牙4.0Demo[1745:346611] <9f5436>
// 2017-04-25 12:34:41.983016+0800 蓝牙4.0Demo[1745:346611] <8f5440>
// 2017-04-25 12:34:42.154821+0800 蓝牙4.0Demo[1745:346611] <9f5649>
// 2017-04-25 12:34:42.239481+0800 蓝牙4.0Demo[1745:346611] <8f5640>
}
} - (void)showMessage:(NSString *)message
{
self.peripheralText.text = [self.peripheralText.text stringByAppendingFormat:@"%@\n",message];
[self.peripheralText scrollRectToVisible:CGRectMake(, self.peripheralText.contentSize.height -, self.peripheralText.contentSize.width, ) animated:YES];
} // 把string类型转成byte 之后转成data
-(NSData*)hexToBytes:(NSString *)string{
NSMutableData* data = [[NSMutableData alloc]init];
int idx;
for (idx = ; idx+ <= string.length; idx +=) {
NSRange range = NSMakeRange(idx, );
NSString* hexStr = [string substringWithRange:range];
NSScanner* scanner = [NSScanner scannerWithString:hexStr];
unsigned int intValue;
[scanner scanHexInt:&intValue];
[data appendBytes:&intValue length:];
}
return data;
} //data转string
- (NSString *)hexStringFromData:(NSData*)data{
return [[[[NSString stringWithFormat:@"%@",data]
stringByReplacingOccurrencesOfString: @"<" withString: @""]
stringByReplacingOccurrencesOfString: @">" withString: @""]
stringByReplacingOccurrencesOfString: @" " withString: @""];
} @end
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