java - 需要帮助纠正 Java 中 GT06 GPS 设备的登录响应

Question

我能够在我们的 Linux 服务器上读取 GT06 数据，我只能看到服务器上的登录请求，但无法看到我设置的每 10 秒的位置数据。在阅读文章、博客和论坛后，我开始知道我需要传递对我的请求的响应。我已发送带有协议(protocol)文档中提到的值的响应，但无法获取位置数据。然后按照Traccar文档并应用了CRC-ITU检查方法，但仍然没有获取位置数据。

来自设备的登录请求

78 78 0D 01     03 58 51 10 22 63 63 06     00 04       BA B6       0D 0A
78 78 0D 01     03 58 51 10 22 63 63 06     00 06       99 A4       0D 0A
78 78 0D 01     03 58 51 10 22 63 63 06     00 08       70 DA       0D 0A
78 78 0D 01     03 58 51 10 22 63 63 06     00 0A       53 C8       0D 0A
78 78 0D 01     03 58 51 10 22 63 63 06     00 0C       36 FE       0D 0A
78 78 0D 01     03 58 51 10 22 63 63 06     00 0E       15 EC       0D 0A
78 78 0D 01     03 58 51 10 22 63 63 06     00 10       EC 13       0D 0A

服务器发送的响应

78 78 05 01 00 11 C9 5D 0D 0A
78 78 05 01 00 0F 30 A2 0D 0A
78 78 05 01 00 0D 13 B0 0D 0A

我使用了以下两种方法来从服务器生成响应。

    private byte[] getLoginResponse(byte[] req){
    byte[] b = new byte[4];
    byte[] bResponse = new byte[10];
    b[0] = 0x05;
    b[1] = req[3];
    b[2] = req[req[2] - 6 + 5];
    b[3] = req[req[2] -5 + 5];

    short x = crc16Ccitt(b);
    bResponse[0] = 0x78;
    bResponse[1] = 0x78;
    bResponse[2] = 0x05;
    bResponse[3] = req[3];
    bResponse[4] = req[req[2] - 6 + 5];
    bResponse[5] = req[req[2] -5 + 5];
    bResponse[6] = (byte) ((x >> 8) & 0xff);;
    bResponse[7] = (byte) (x & 0xff);
    bResponse[8] = 0x0D;
    bResponse[9] = 0x0A;
    return bResponse;
}



public  short crc16Ccitt(byte[] bytes) {
    int crc = 0xFFFF;          // initial value
    int polynomial = 0x1021;   // 0001 0000 0010 0001 (0, 5, 12)

    for (byte b : bytes) {
        for (int i = 0; i < 8; i++) {
            boolean bit = ((b   >> (7-i) & 1) == 1);
            boolean c15 = ((crc >> 15    & 1) == 1);
            crc <<= 1;
            if (c15 ^ bit) crc ^= polynomial;
        }
    }

    crc &= 0xffff;
    return (short) crc;
}

您能告诉我这有什么问题吗？为什么不能连续获取位置数据。

谢谢

Answer 1

    private static byte[] getLoginResponse(){
          byte[] respBuffer = new byte[10];
        byte[] tmprespBuffer = new byte[4];

      respBuffer[0] = (byte)(0x78);
      respBuffer[1] = (byte)(0x78);


      //Length:
      respBuffer[2] = (byte)(0x05);
      tmprespBuffer[0] = (byte)(0x05);

      //Profotcol
      respBuffer[3] = (byte)(0x01);
      tmprespBuffer[1] = (byte)(0x01);

      //Serial No
      respBuffer[4] =  (byte)(0x00);
      respBuffer[5] =  (byte)(0x01);

      tmprespBuffer[2] =(byte)(0x00);
      tmprespBuffer[3] = (byte)(0x01);

      //CRC Check...
      String crc = new Crc16().getCRC(tmprespBuffer);

      respBuffer[6] = (byte)Integer.parseInt(crc.substring(0,2), 16);
      respBuffer[7] = (byte)Integer.parseInt(crc.substring(2,4).toString(), 16);



      respBuffer[8] = (byte) 0x0D ;
      respBuffer[9] = (byte) 0x0A ;


        return respBuffer;
    }

    private static byte[] getStatuesResponse(){
          byte[] respBuffer = new byte[10];
      byte[] tmprespBuffer = new byte[4];

    respBuffer[0] = (byte)(0x78);
    respBuffer[1] = (byte)(0x78);


    //Length:
    respBuffer[2] = (byte)(0x05);
    tmprespBuffer[0] = (byte)(0x05);

    //Profotcol
    respBuffer[3] = (byte)(0x13);
    tmprespBuffer[1] = (byte)(0x13);

    //Serial No
    respBuffer[4] =  (byte)(0x00);
    respBuffer[5] =  (byte)(0x01);

    tmprespBuffer[2] =(byte)(0x00);
    tmprespBuffer[3] = (byte)(0x01);

    //CRC Check...
    String crc = new Crc16().getCRC(tmprespBuffer);

    respBuffer[6] = (byte)Integer.parseInt(crc.substring(0,2), 16);
    respBuffer[7] = (byte)Integer.parseInt(crc.substring(2,4).toString(), 16);



    respBuffer[8] = (byte) 0x0D ;
    respBuffer[9] = (byte) 0x0A ;


        return respBuffer;
    }

public class Crc16 {

      //private static final Logger log = Logger.getLogger(Crc16.class);

      public static void main(String[] args){

          byte b[] = new byte[13] ;

         // b[0] = (byte) 0x78;
         // b[1] = (byte) 0x78;
         // 24 24 00 11 13 61 23 45 67 8f ff 50 00 05 d8 0d 0a
          b[0] = (byte) 0x24;
          b[1] = (byte) 0x24;
          b[2] = (byte) 0x00;
          b[3] = (byte) 0x11;
          b[4] = (byte) 0x13;
          b[5] = (byte) 0x61;
          b[6] = (byte) 0x23;
          b[7] = (byte) 0x45;
          b[8] = (byte) 0x67;
          b[9] = (byte) 0x8f;
          b[10] = (byte) 0xff;
          b[11] = (byte) 0x50;
          b[12] = (byte) 0x00;



          System.out.println(new Crc16().getCRC(b));
          System.out.println(new Crc16().CRC16CCITT(b));
      }

      public String getCRC(byte bytes[]){

          int crc = 0xffff;

          try{

          int[] table = {

                0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
                0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
                0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
                0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
                0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
                0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
                0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
                0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
                0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
                0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
                0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
                0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
                0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
                0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
                0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
                0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
                0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
                0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
                0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
                0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
                0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
                0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
                0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
                0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
                0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
                0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
                0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
                0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
                0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
                0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
                0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
                0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78

            };



            for (byte b : bytes) {

               // System.out.println((crc ^ b) & 0xff);
                crc = (crc >>> 8) ^ table[(crc ^ b) & 0xff];
            }


            crc = ~crc;

            }catch(Exception ex){
             // log.error(ex);
          }

            return Integer.toHexString(crc).substring(4,8);

      }

      public String CRC16CCITT(byte bytes[])
      {
       int crc = 0xFFFF;          // initial value
            int polynomial = 0x1021;   // 0001 0000 0010 0001  (0, 5, 12)

            // byte[] testBytes = "123456789".getBytes("ASCII");

           // byte[] bytes = args[0].getBytes();

            for (byte b : bytes) {
                for (int i = 0; i < 8; i++) {
                    boolean bit = ((b   >> (7-i) & 1) == 1);
                    boolean c15 = ((crc >> 15    & 1) == 1);
                    crc <<= 1;
                    if (c15 ^ bit) crc ^= polynomial;
                 }
            }

            crc &= 0xffff;
            System.out.println("CRC16-CCITT = " + Integer.toHexString(crc));
            return Integer.toHexString(crc);
      }

      @SuppressWarnings("unused")
    private String md5(String s) {
        try 
        {
            MessageDigest m = MessageDigest.getInstance("MD5");
            m.update(s.getBytes(), 0, s.length());
            BigInteger i = new BigInteger(1,m.digest());
            return String.format("%1$032x", i);         
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return null;
    }



}