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，但无法查看我设置的每10秒的位置数据。阅读文章，博客和论坛后，我才知道我需要将回复传递给我的请求。我已经发送了响应，其中包含协议文档中提到的但无法获取位置数据的值。然后按照Traccar文件和应用CRC-ITU检查方法，但仍然没有得到位置数据。
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Resonse
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;
}
请告诉我这有什么问题，为什么不连续获取位置数据。
由于
答案 0 :(得分：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;
}
}