从Arduino Uno读取字节

Question

我正在使用RxTx库在Arduino和Java应用程序之间进行通信。 我的Arduino鳕鱼是：

void setup(){
  Serial.begin(9600);
}

void loop(){
  Serial.println("Hello world");
  delay(1000);
} 

如果您想查看我所有的java cods All 。 我有一种从arduino读取字节的方法

public byte[] readBlocked(int num) throws IOException {
        byte[] buff;
        buff = new byte[num];

       this.inputStream.readFully(buff, 0, num);

        return buff;
    }

在TestComunication类中，我打印接收数据

public class TestComunication {

    private Connection connection;
    //private CommPortIdentifier port;
    private static final String PORT_NAMES[] = {
        "/dev/tty.usbserial-A9007UX1", // Mac OS X
        "/dev/ttyACM0", // Raspberry Pi
        "/dev/ttyUSB0", // Linux
        "COM3", // Windows
        "/dev/tty.usbmodem621",
        "/dev/tty.usbmodem411"
    };

    public TestComunication() throws IOException {

        SerialClassConnection serialClassConnection = null;
        CommPortIdentifier port = null;

        serialClassConnection = SerialClassConnection.getInstance();
        Enumeration portEnum = CommPortIdentifier.getPortIdentifiers();

        //First, Find an instance of serial port as set in PORT_NAMES.
        while (portEnum.hasMoreElements()) {
            CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement();
            for (String portName : PORT_NAMES) {
                if (currPortId.getName().equals(portName)) {
                    port = currPortId;
                    break;
                }
            }
        }

        if (port == null) {
            System.out.println("Could not find COM port.");
            return;
        }
        System.out.println(port.getName());

        serialClassConnection.openPort(port);

        this.connection = serialClassConnection;

        this.manageData(this.connection);
    }

    private void manageData(Connection conn) throws IOException {

        Connection connection;
        int availableBytes;
        byte[] inBytes;

        connection = conn;
        // listen forever for incoming data

        while (true) {
            if (connection.isDataAvailable()) {

                inBytes = connection.readBlocked(11);
                String text = new String(inBytes, "UTF-8");
                System.out.println(text);
            }

        }
    }

    public static void main(String[] args) throws IOException {

        new TestComunication();
        Thread t = new Thread() {
            public void run() {
                //the following line will keep this app alive for 1000 seconds,
                //waiting for events to occur and responding to them (printing incoming messages to console).
                try {
                    Thread.sleep(5000);
                } catch (InterruptedException ie) {
                }
            }
        };
        t.start();
        System.out.println("Started");

    }
}

我正在发送字符串

你好，世界

来自Arduino Uno 在我的Java应用程序中，我正在以字符串形式读取此字符串。 但是我收到的数据不连贯。 例：

Native lib Version = RXTX-2.1-7
Java lib Version   = RXTX-2.1-7
/dev/tty.usbmodem621
Held
Hello
world
Hel
lo world
H
ello world

主要问题：字符串Hello World转换为ASCII是

072 101 108 108 111 032 119 111 114 108 100

但我不会每次都收到该序列。 我收到的示例：

072 108 101 108 111 032 119 111 114 108 100

101072108108111032111114108119100

101 072 108 111 032 114 108 111119 100 108

但是接收数据的长度是正确的11个字节

Answer 1

嗯什么返回this.inputStream.readFully(buff, 0, num); 检查此方法，也许是错误的