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jt-808-protocol's Issues

JT808ProtocolUtils.doEscape4Receive有问题

JT808ProtocolUtils.的doEscape4Receive方法有问题,最后一个循环for (int i = end - 1; i < bs.length; i++) {
baos.write(bs[i]);
} 应该要从上一个循环的i值开始,这里要考虑到有转义的情况。

经度纬度的数据不对

  // 3. byte[8-11] 纬度(DWORD(32)) 以度为单位的纬度值乘以10^6,精确到百万分之一度
    ret.setLatitude(this.parseFloatFromBytes(data, 8, 4));
    // 4. byte[12-15] 经度(DWORD(32)) 以度为单位的经度值乘以10^6,精确到百万分之一度
    ret.setLongitude(this.parseFloatFromBytes(data, 12, 4));

上面的代码解析出来的经度纬度的数据不对,使用字节转为java的整型,然后除以1000000就对了

下发数据时的校验有问题

非常感谢作者的无私奉献,代码下载后一下就把设备接进来了。但是使用过程中发现回复的报文校验不对。
getCheckSum4JT808 这个方法最后一个参数不应该 -1

如何生成模拟报文

你好,非常感谢这个项目。

但还是有几个小问题,我看到你这里有写了终端注册的模拟报文,那其他的接口比如什么数据上行透传之类的如何来生成这个原始报文呢?

之后到了测试介入,他们肯定也需要改报文的。

所以是否有这样的工具可以直接根据接口来生成呢?就算没有的话能否提供一个思路。

万分感谢。

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