[网络协议]海康ehome协议分析(4)：GPS上传

海康带有GPS的设备，是通过报警（Alarm）服务进行GPS上传的，具体通信通道是根据配置文件，可选择UDP，UDP&TCP，MQTT方式分别对应的配置是：

    <Param>
        <LogPath>C:/EHomeSdkLogs/</LogPath>
        <LogLevel>3</LogLevel>
        <LogAutoDel>false</LogAutoDel>
        <KeepAliveSeconds>15</KeepAliveSeconds>
        <KeepAliveCount>6</KeepAliveCount>
        //报警方式： 0:udp,1:UDP&TCP, 2:MQTT
        <AlarmServerType>2</AlarmServerType>
        // ALARM的报警地址
        <AlarmServerIP>192.168.31.253</AlarmServerIP>
        // ALARM的报警端口
        <AlarmServerUdpPort>7332</AlarmServerUdpPort>
        <AlarmServerTcpPort>7333</AlarmServerTcpPort>
        <AlarmServerMqttPort>7334</AlarmServerMqttPort>
        <AlarmServerPortUseCms>0</AlarmServerPortUseCms>
        <NTPServerIP>10.17.132.231</NTPServerIP>
        <NTPServerPort>123</NTPServerPort>
        <NTPInterval>3600</NTPInterval>
        <PictureServerType>2</PictureServerType>
        <PictureServerIP>192.168.1.243</PictureServerIP>
        <PictureServerPort>10002</PictureServerPort>
        <CmsAccessSecurity>0</CmsAccessSecurity>
        <AlarmAccessSecurity>0</AlarmAccessSecurity>
        <StreamAccessSecurity>0</StreamAccessSecurity>
        <AlarmPictureSeparate>1</AlarmPictureSeparate>
    </Param>

上报文

• 接收

<?xml version="1.0" encoding="UTF-8"?>
<PPVSPMessage>
    <Version>2.0</Version>
    <Sequence>1137</Sequence>
    <CommandType>REQUEST</CommandType>
    <Command>GPS</Command>
    <Params>
        //设备ID
        <DeviceID>123457</DeviceID>
        //上报时间
        <Time>2021-08-23 16:35:35</Time>
        //方向
        <DivisionEW>E</DivisionEW>
        //经度 范围：0-（180*3600*100）
        //转换公式：实际度数*3600*100+实际分数*60*100+实际秒数*100
        <Longitude>43713595</Longitude>
        <DivisionNS>N</DivisionNS>
        //纬度
        //转换公式：实际度数*3600*100+实际分数*60*100+实际秒数*100
        <Latitude>11214118</Latitude>
        //方向 0表示正北
        <Direction>0</Direction>
        //速度 cm/h
        <Speed>0</Speed>
        //星数
        <Satellites>7</Satellites>  
        //精度
        <Precision>13</Precision>
        //高度
        <Height>2160</Height>
        <RetransFlag>1</RetransFlag>
        <NeedsResponse>1</NeedsResponse>
        <TimeZone>+08:00</TimeZone>
        <Remark>test/debug</Remark>
    </Params>
</PPVSPMessage>

• 回复

<?xml version="1.0" encoding="GB2312" ?>
<PPVSPMessage>
    <Version>2.5</Version>
    <Sequence>1137</Sequence>
    <CommandType>RESPONSE</CommandType>
    <WhichCommand>GPS</WhichCommand>
    <Status>200</Status>
    <Description>OK</Description>
    <Params>
        <RetransFlag>1</RetransFlag>
    </Params>
</PPVSPMessage>