BGS5T RS232通讯与1线传感器

Question

我有金雅拓BGS5T java模块和单线温度传感器。我有一个java midlet，它使用RS232端口与温度传感器通信。但问题是，无论我发送什么，我都不会得到传感器的响应。传感器上有正确的电压，所以连接应该很好。我试着测试我的程序，这样我就把rs232端口连接到了电脑上，并用终端（Termite）观察发送的数据是否正确，一切看起来都应该正确。另一个测试是，我将温度传感器直接连接到计算机上，并用终端发送数据，它正常工作。我甚至收到了一些随机输入的回复，比如9999。我检查了终端内部的连接参数，并将它们复制到javamidlet中，但没有成功。只有一次我得到了一些回应，但当我第二天试图继续工作时，我没有成功。终端内部参数：波特率：9600数据位：8停止位：1奇偶校验：无流量控制：RTS/CTS

这是Java代码：

String strCOM = "comm:COM0;blocking=on;baudrate=9600";
commConn = (CommConnection)Connector.open(strCOM);
System.out.println("CommConnection(" + strCOM + ") opened");
System.out.println("Real baud rate: " + commConn.getBaudRate());
inStream  = commConn.openInputStream();
outStream = commConn.openOutputStream();
System.out.println("InputStream and OutputStream opened");

while(1==1)
    {
        byte bC1 = (byte)Integer.parseInt("11000001",2);
        byte C1 = hexToBin("C1");
        byte bparameter2 = (byte)Integer.parseInt("00010111",2);
        byte bparameter3 = (byte)Integer.parseInt("01000101",2);
        byte bparameter4 = (byte)Integer.parseInt("01011011",2);
        byte bparameter5 = (byte)Integer.parseInt("00001111",2);
        byte bparameter6 = (byte)Integer.parseInt("10010101",2);
        byte[] bArray = {bparameter2,bparameter3,bparameter4,bparameter5,bparameter6};


      int ch;
      try {
        outStream.write(bC1);
        Thread.sleep(50);
        //outStream.write(bArray);
        outStream.write(bparameter2);
        outStream.write(bparameter3);
        outStream.write(bparameter4);
        outStream.write(bparameter5);
        outStream.write(bparameter6);
        System.err.println("inStream bytes:" + inStream.available());
        if(inStream.available() > 0)
        {   
          String msg = "";
          while(inStream.available() > 0)
          {
            ch = inStream.read();
            msg = msg + (char) ch;
          }
          System.out.println("Serial msg: " + msg);
        }
        outStream.write('9');
        outStream.write('9');
        outStream.write('9');
        outStream.write('9');
        Thread.sleep(100);
        outStream.write('9');
        outStream.write('9');
        outStream.write('9');
        outStream.write('9');
        System.err.println("inStream bytes:" + inStream.available());
        if(inStream.available() > 0)
        {   
          String msg = "";
          while(inStream.available() > 0)
          {
            ch = inStream.read();
            msg = msg + (char) ch;
          }
          System.out.println("Serial msg: " + msg);
        }

Answer 1

我不得不使用零调制解调器电缆使其工作。