Question

我在iPhone 5C和Linux上使用CoreBluetooth时遇到了一个奇怪的问题。 iPhone 5S。根据情况，我将接收83字节的数据，分为20个字节（共5个块）。 iPhone 5S / 5C上的数据不同（请参阅下面的转储）：chunk＃4在这些设备下替换了＃3块。但是在iPad3上（使用6.1和7.0.2 iOS）一切都还可以

// iPhone 5C, iOS 7.0.2
nRF UART[237:60b] Received data on a characteristic. 0x01=001,0x02=5B2226
nRF UART[237:60b] Received data on a characteristic. 400192,0x05=1.0.0,0x
nRF UART[237:60b] Received data on a characteristic. ,0x09=2,0x0a=0,0x0b=
nRF UART[237:60b] Received data on a characteristic. ,0x09=2,0x0a=0,0x0b=
nRF UART[237:60b] Received data on a characteristic. 100ˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇ

// iPad 3, iOS 6.1.3 && iPad 3, iOS 7.0.2
nRF UART[221:60b] Received data on a characteristic. 0x01=001,0x02=5B2226
nRF UART[221:60b] Received data on a characteristic. 400192,0x05=1.0.0,0x
nRF UART[221:60b] Received data on a characteristic. 07=2013.010,0x08=001
nRF UART[221:60b] Received data on a characteristic. ,0x09=2,0x0a=0,0x0b=
nRF UART[221:60b] Received data on a characteristic. 100ˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇ

// iPhone 4S, iOS 6.1.3
nRF UART[241:60b] Received data on a characteristic. 0x01=001,0x02=5B2226
nRF UART[241:60b] Received data on a characteristic. 400192,0x05=1.0.0,0x
nRF UART[241:60b] Received data on a characteristic. 07=2013.010,0x08=001
nRF UART[241:60b] Received data on a characteristic. ,0x09=2,0x0a=0,0x0b=
nRF UART[241:60b] Received data on a characteristic. 100ˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇ

我的问题是：如何从5S / 5C设备获取正常数据？也许，有一些CBC特性或CBCentralManager的技巧？

感谢。

修改

正如 @allprog 建议的那样，以下是我使用CoreBluetooth的代码片段。

这是非常基本的方法：

// CBCentralManager init
self.cm = [[CBCentralManager alloc] initWithDelegate:self queue:nil];

// Getting data chunks from CBCharacteristic in CBPeripheral's Delegate
- (void) peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
    {
        if (error)
        {
            NSLog(@"Error receiving notification for characteristic %@: %@", characteristic, error);
    return;
        }

        NSLog(@"Received data on a characteristic. %s", [[characteristic value] bytes]);
        // ... the rest of code
}

Answer 1

如果您要传输大块数据并且必须将其拆分为多个数据包，我建议为每个数据包添加某种ID。这将为您提供接收方所需的其他信息，以确定数据包是否被丢弃，接收两次等。如果您检测到数据包被丢弃，您可能想要一种方法来通过ID重新请求数据包外围设备。

编辑：同样，如评论中所述，您可以切换到指示，让蓝牙堆栈满足您对保证和非重复传送的需求。

iPhone 5C / 5S上的CoreBluetooth：破坏了收到的数据

1 个答案: