用蓝牙把文本从Arduino发送到iphone，我不能带character.value

Question

目的: Arduino向iphone应用程序发送一个感应值。

问题:我做了一个可以与Arduino连接的BlueTooth应用程序。我有时会像图4那样成功，但我不能从arduino那里拿到一根线。我可以只得到“<00>”或者空格。

我需要修改我的申请吗？我得先换掉阿杜伊诺？还是我的ios源代码？

图1是Arduino蓝牙源代码=> (蓝牙是蓝牙4.0)

#include <SoftwareSerial.h>

int blueTx = 6; 
int blueRx = 7; 

SoftwareSerial BTSerial(blueRx,blueTx); //connect HC-10 TX, RX

void setup() {
  Serial.begin(9600);
  Serial.println("hello world");      
  BTSerial.begin(9600);
  Serial.println("BTSerial begin");
}

void loop() {
  while(BTSerial.available())
  {

    BTSerial.println("hello world");
    BTSerial.write("BTSerial is open!");
  }
}

图2是Xcode日志

2015-09-24 15:58:52.822 Arduino_BLE test1[1727:734383] STATE - Power On
2015-09-24 15:58:52.822 Arduino_BLE test1[1727:734383] SCAN - Scanning
2015-09-24 15:58:52.873 Arduino_BLE test1[1727:734383] DISCOVER - Discover : <CBPeripheral: 0x135537f00, identifier = B4A88537-AF01-B403-AA32-F2C84464CFE6, name = HMSoft, state = disconnected>
2015-09-24 15:58:52.873 Arduino_BLE test1[1727:734383] DISCOVER - Connecting to peripheral <CBPeripheral: 0x135537f00, identifier = B4A88537-AF01-B403-AA32-F2C84464CFE6, name = HMSoft, state = connecting>
2015-09-24 15:58:53.015 Arduino_BLE test1[1727:734383] CONNECT - To HMSoft
2015-09-24 15:58:53.016 Arduino_BLE test1[1727:734383] CONNECT - Scanning stoped
2015-09-24 15:58:53.301 Arduino_BLE test1[1727:734383] DISCOVER_SERVICE - Service : <CBService: 0x13556ae90, isPrimary = YES, UUID = FFE0>
2015-09-24 15:58:53.421 Arduino_BLE test1[1727:734383] DISCOVER_CHAR - Characteristic : <CBCharacteristic: 0x135673ce0, UUID = FFE1, properties = 0x16, value = (null), notifying = NO>
2015-09-24 15:58:53.481 Arduino_BLE test1[1727:734383] UPDATE_VALUE - start
2015-09-24 15:58:53.481 Arduino_BLE test1[1727:734383] UPDATA_VALUE - stringFromData : 
2015-09-24 15:58:53.481 Arduino_BLE test1[1727:734383] UPDATA_VALUE - data : <00>
2015-09-24 15:58:53.691 Arduino_BLE test1[1727:734383] NOTIFY - Notification start
2015-09-24 15:58:53.691 Arduino_BLE test1[1727:734383] NOTIFY - Notification began on <CBCharacteristic: 0x135673ce0, UUID = FFE1, properties = 0x16, value = <00>, notifying = YES>
2015-09-24 15:58:53.691 Arduino_BLE test1[1727:734383] NOTIFY - stringFromData : 

图3是我为蓝牙网络写的源代码。

//DISCOVER CHAR
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{
    if (error) {NSLog(@"DISCOVER_CHAR - Error");return;}

    for (CBCharacteristic * characteristic in service.characteristics) {
        NSLog(@"DISCOVER_CHAR - Characteristic : %@",characteristic);
        [peripheral readValueForCharacteristic:characteristic];
        [peripheral setNotifyValue:YES forCharacteristic:characteristic];
    }
}

//INTERACT
//READ
-(void)peripheral:(CBPeripheral *)peripheral
didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic
            error:(NSError *)error
{
    NSLog(@"UPDATE_VALUE - start");
    NSString *stringFromData = [[NSString alloc]initWithData:characteristic.value encoding:NSUTF8StringEncoding];
    NSLog(@"UPDATA_VALUE - stringFromData : %@", stringFromData);

    [_data appendData:characteristic.value];
    NSLog(@"UPDATA_VALUE - data : %@",_data);
}

图4是我之前成功的例子。但是…。。我不能再这样做了

UPDATA_VALUE - start
UPDATA_VALUE - stringFromData :
UPDATA_VALUE - stringFromData :<00>
UPDATA_VALUE - start    
UPDATA_VALUE - stringFromData :hello world

BTSeria
UPDATA_VALUE - stringFromData:<0068656c 6c6f2077 6f726c64 0d0a4254 53657269 61>
UPDATA_VALUE - start
UPDATA_VALUE - stringFromData :l begin

UPDATA_VALUE - stringFromData :<0068656c 6c6f2077 6f726c64 0d0a4254 53657269 616c2062 6567696e 0d0a>

Answer 1

当前代码中的语法：

BTSerial.begin(9600);

此语法表示您使用的是9600波特率。首先，你需要弄清楚你的设备接受数据的波特率是多少。如果您不知道波特率，您可以尝试不同的标准波特率，如2400,4800,9600,19200,38400等。您可以参考您的蓝牙模块的数据表了解此信息。

Answer 2

见见德赛！谢谢。我一个接一个地改变了事情。最后，我从arduino那里得到了消息。问题出在Arduino中sensorValue的“值格式”。我刚刚将sensorValue的值格式从"int“改为"byte”。这就是工作！我解决了它！再次感谢您的关注。