FIFOTRACK Q3 COMMAND LIST
6
1 GPRS Command Format
GPRS uplink (i.e.: Data is sent from terminal to platform) command format:
$$<pack-len>,<ID>,<work-no>,<cmd-code>,<cmd-para>*<checksum>\r\n
GPRS downlink (i.e.: Data is sent form platform to terminal) command format:
##<pack-len>,<ID>,<work-no>,<cmd-code>,<cmd-para>*<checksum>\r\n
Remarks:
Comma (,) is used to separate data field, and it is necessary. There is no space before or after
comma.
pack-len: Package Length, decimal string format, the field of pack-len is
{,<ID>,<work-no>,<cmd-code>,<cmd-para>}, be careful, comma(,) in front of ID included.
ID: Terminal ID, default IMEI.
work-no: working number, hexadecimal string format, cyclic accumulation from 1 to 0xFFFF.
cmd-code: Command code, or specification of data type.
cmd-para: parameter or description of cmd-code, which is described in the following
chapter.
checksum: checksum of package, 2 bytes hexadecimal string format, XOR of
{<pack-len>,<ID>,<work-no>,<cmd-code>,<cmd-para>}.
\r\n: End of package, i.e. <CR><LF>.
Without specification, multi-byte binary data in cmd-para uses big endian format, i.e. Most
Significant Byte first.
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