
GT300 @Track Air Interface Protocol
— <daylight saving>: 0 to disable the daylight saving, 1 to enable.
— <UTC time>: UTC time sent by the backend server to adjust the local time.
— <serial number>: As the command reference, the exact serial number will be sent back to the
platform in ACK. It is in hexadecimal format. It should begin from 0000 and increases by
1 every time. It should roll back after “FFFF”.
The acknowledgment message of AT+GTTMA command:
¾ +ACK:GTTMA,
Example:
+ACK:GTTMA,135790246811220,0009,20090101000002,11F0,0102070202
3.2.11. SIM Card Binding
The AT+GTBND command is used to make a binding between the device and the installed SIM
card. If the bound SIM card is replaced by other card later, the device will send alarm to the
backend server by message +RESP:GTBND with its current location via SMS.
¾ AT+GTBND=
Example:
AT+GTBND=gt300,1,,,,,000A
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