GLOBALSAT TR-203A - Manual (Page 8)

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2.5 Report Messages Format
There are two types of report message format, “format 0” and “format 1”.
(Refer to “11. Report” for detail definition)
Example:
TR-203 -> Server (format 0)
GS r ,IMEI,Device_Mode,Report_Type,Alarm_Status,Geofence_st
atus,GPS_Fix,UTC_Date,UTC_Time,Longitude,Latitude,Altitude
,Speed,Heading,Number_of_Satellites,HDOP,Battery_capacity*
checksum!
TR-203 -> Server (format 1)
GS h , IMEI,Alarm_Status,GPS_Fix,Battery_capacity*checksum!