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Report Messages
A report is generated by a specific event, such as ping, SOS alarm, battery low,
etc. Each event has a corresponding report type and report media. Please refer
to section 2.6 for the mapping of report type. The report media defines
the report channel (TCP/UDP/SMS) and report format.
There are three types of GPRS report format, “format 0”, “format 1”
and “format 2”. Typically format 0 is used for normal report which
contains as many information as possible, and format 1 is used for heart beat
report which contains necessary information to notify the server that the
device is working properly.
Selection of report format 0/1 is defined in the report media setting for
respective report condition. Please refer to section “2.9 Report media”
for detail.
If GPS signal is blocked and the device can not get GPS fix when sending
report format 0, format 2 is an alternative which contains GSM base station
identifiers called “CELL ID”. Because the location of each GSM base station
is fixed and known, “CELL ID” information can be used to calculate the
approximate location of the device.
Format 0 and format 1 are configurable by setting O3 & ON respectively. But
the format of format 2 is fixed.
There are two types of SMS messages. The first type is the same as GPRS
report which is efficient in length but it is not friendly for reading. In order
to overcome this drawback, the second type of SMS report is added for
easy reading. The sentence and information of second type are all
configurable.
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