GL300 @Tracker Air Interface Protocol
When the device receives commands over the air, it supports several commands in one SMS or
GPRS packet without separate symbol between two close commands. But it is necessary to make
sure the total size of the several commands is not longer than 160 if the commands are sent via
SMS. Here is an example to send three commands in one SMS.
AT+GTFRI=gl300,1,1,,,0000,2359,60,60,,,1F,0,,,,,,,,0007$AT+GTGEO=gl300,0,3,101.412248,
21.187891,1000,600,,,,,,,,,0008$AT+GTSPD=gl300,1,5,40,30,60,,,,,,,,,,,,,,,,0009$
It includes three commands (
AT+GTFRI
,
AT+GTGEO
and
AT+GTSPD
) in the above message.
And the terminal will handle the three commands one by one after it received the message via
SMS and it will report the following three acknowledgement message to the backend server one
by one.
+ACK:GTFRI,1A0102,135790246811220,,0007,20100310172830,11F0$
+ACK:GTGEO,1A0102,135790246811220,,0,0008,20100310172900,11F1$
+ACK:GTSPD,1A0102,135790246811220,,0009,20100310172930,11F2$
TRACGL300AN001
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