react-native-bt-device/ios/RNBTDevice/Device/ENGGlucoDevice.m

//
//  ENGGlucoDevice.m
//  RNBTDevice
//
//  Created by zcwmac on 2019/5/15.
//  Copyright © 2019年 zmxv. All rights reserved.
//
#import "ENGGlucoDevice.h"
#import "ENDLog.h"
static  NSString* UUID_BTLE_SERVICE = @"49535343-fe7d-4ae5-8fa9-9fafd205e455";
static  NSString* UUID_BTLE_SEND = @"49535343-8841-43f4-a8d4-ecbe34729bb3";
static    NSString* UUID_BTLE_RECEIVE = @"49535343-1e4d-4bd9-ba61-23c647249616";

static NSString *displayName = @"G系列血糖测试仪";

@implementation ENGGlucoDevice{
    CBCharacteristic *_sendCharacteristic;
}

-(instancetype)initWithPeripheral:(CBPeripheral *)peripheral WithCentralManager:(CBCentralManager *)centerManager WithDevice:(BLEDevice *)device{
    self = [super initWithPeripheral:peripheral WithCentralManager:centerManager WithDevice:device];
    if(self){
        
        
    }
    return self;
}

- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{
    //找到服务,开始扫描指定的服务
    NSArray *array = [peripheral services];
    
    for( CBService *service in array ){
        //        NSString *uuid = [NSString stringWithFormat:@"%@",service.UUID];
        CBUUID *serviceUUID = [CBUUID UUIDWithString:UUID_BTLE_SERVICE];
        //        ENDLog([NSString stringWithFormat:@"service uuid%@",serviceUUID]);
        if([serviceUUID isEqual:service.UUID]){
            NSArray *uuids = @[[CBUUID UUIDWithString:UUID_BTLE_SEND],
                               [CBUUID UUIDWithString:UUID_BTLE_RECEIVE]];
            
            [peripheral discoverCharacteristics:uuids forService:service];
            break;
        }
    }
}

- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error;{
    CBUUID *sendUUID = [CBUUID UUIDWithString:UUID_BTLE_SEND];
    CBUUID *receiveUUID = [CBUUID UUIDWithString:UUID_BTLE_RECEIVE];
    
    for( CBCharacteristic *characteristic in service.characteristics){
        NSString *log =[NSString stringWithFormat:@"characteristic is %@",characteristic];
        ENLog(log);
        
        if([characteristic.UUID isEqual:sendUUID]){
            _sendCharacteristic = characteristic;
            unsigned char data[2] = {0xff,0xaa};
            //            [peripheral writeValue:[NSData dataWithBytes:&data length:2] forCharacteristic:characteristic type:CBCharacteristicWriteWithoutResponse];
            [self sendData:[NSData dataWithBytes:data length:2]];
            continue;
        }
        
        if([characteristic.UUID isEqual:receiveUUID]){
            [peripheral setNotifyValue:YES forCharacteristic:characteristic];
        }
    }
}

- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{
    CBUUID *receiveUUID = [CBUUID UUIDWithString:UUID_BTLE_RECEIVE];
    
    if( [receiveUUID isEqual:characteristic.UUID]){
        [[ENDLog share] log:[NSString stringWithFormat:@"receive gluco data:%@",characteristic.value]];
        if([self checkedCommandIntegrityWithData:characteristic.value]){
            Byte *dat = (Byte *)[[characteristic value] bytes];
            Byte callbackByte[2] = {0xff,dat[2]};
            [self sendData:[NSData dataWithBytes:callbackByte length:2]];
            
            dispatch_async(dispatch_get_main_queue(), ^{
                NSDictionary *info = [self data2GlucoseWithData:[characteristic value]];
                //血糖
                if([self.deviceDelegate respondsToSelector:@selector(getResult:WithDevice:)]){
                    [(id)self.deviceDelegate getResult:info WithDevice:_device];
                }
            });
        }
    }
}

/** 处理函数 */
-(BOOL)checkedCommandIntegrityWithData:(NSData *)data{
    //长度检测
    if(data.length<7){
        return false;
    }
    
    Byte *b = (Byte *)[data bytes];
    
    //报文头检测
    if(b[0] != 0x40){
        return  false;
    }
    
    //有效命令长度检测
    if(b[3] != (data.length - 6)){
        return false;
    }
    
    
    if([self checkedRepeatCommandWithData:data]){
        return false;
    }
    
    return true;
}



//private static int queId = -1;
/** 校验是否是重复指令 */
-(BOOL)checkedRepeatCommandWithData:(NSData *)data{
    static int queId = -1;
    Byte *b = (Byte *)[data bytes];
    
    int m = (b[2]&0xff);
    if(m == queId){
        return true;
    }
    //2.将该条命令的顺序id写入缓存
    queId = m;
    
    //4.返回false.
    return false;
}

-(NSDictionary *)data2GlucoseWithData:(NSData *)data{
    Byte *b = (Byte *)[data bytes];
    NSMutableDictionary *info = [[NSMutableDictionary alloc] initWithCapacity:10];
    info[@"year"] = @(2000+(b[6] & 0xff));
    info[@"month"] = @(b[4] & 0xff);
    info[@"date"] = @(b[5] & 0xff);
    info[@"hour"] = @(b[7] & 0xff);
    info[@"minute"] = @(b[8] & 0xff);
    info[@"Glucose"] = @((b[11]&0xff) + 256*(b[10]&0xff-128));
    //    info[@"mask"] = @(b[11]&0xff);
    //    info[@"flag"]= @((b[12]&0xff) + 256*(b[13]&0xff));
    
    
    
    //    if([info[@"flag"] integerValue]>=4096){
    //        float value = [info[@"Glucose"] floatValue]/10;
    //        NSString *displayValue = [NSString stringWithFormat:@"%d.%d",(int)value,((int)(value*10)%10)];
    //        info[@"displayValue"] = displayValue;
    //    }else{
    //    String displayValue = new BigDecimal((data.getGlucose() * 0.055) + 0.0001).setScale(1, RoundingMode.HALF_UP).toString();
    float value = [info[@"Glucose"] floatValue]* 0.055+0.0001;
    //        NSString *glucoseValue = [NSString stringWithFormat:@"%d.%d",(int)value,((int)(value*10)%10)];
    NSString *glucoseValue = [NSString stringWithFormat:@"%0.1f",value];
    //    info[@"Glucose"] =glucoseValue;
    info[@"displayValue"] = glucoseValue;
    //    }
    
    return [info copy];
}



/** 发送数据 */
-(void)sendData:(NSData *)data{
    [_peripheral writeValue:data forCharacteristic:_sendCharacteristic type:CBCharacteristicWriteWithoutResponse];
}

/** 得到设备显示名字 */
-(NSString *)getDeviceDisplayName{
    return displayName;
}


@end