Specifications

GT300 @Track Air Interface Protocol
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— Force on SMS
In this mode, the terminal will communicate exclusively via SMS.
The following lists the details and examples of these connection modes.
¾ TCP Short Connection + SMS Mode
— Set <report mode> as 0 using the AT+GTSRI command.
— In this mode, the terminal will establish a socket with the backend server for every message.
— The terminal will use the secondary backend server for backup in case sending data to the
main server fails.
— The terminal will use the SMS server as backup in case failing to send data to both main
server and backup server via TCP.
Example:
Configure the terminal with the command as follows: AT+GTSRI=gt300,0,cmnet,,,116.228.221.61
,7001,+7911888888,0000
Please note that the boldfaced “0” means “TCP short connection + SMS mode”.
The backend server sends the acknowledgement message to confirm:
+ACK:GTSRI,135790246811220,0000,20090112104725,000A,0102070202
¾ TCP Short Connection Mode
— Set <report mode> as 1 using the AT+GTSRI command.
— In this mode, the terminal will establish a socket with the backend server for every message.
— The terminal will use the secondary backend server for backup in case sending data to the
main server fails.
Example:
Configure the terminal with the command as follows: AT+GTSRI=gt300,1,cmnet,,,116.228.221.61
,7001,+7911888888,0000
Please note that the boldfaced “1” means “TCP short connection mode”.
The backend server sends the acknowledgement message to confirm:
+ACK:GTSRI,135790246811220,0000,20090112104725,000A,0102070202
¾ TCP Long Connection Mode
— Set <report mode> as 2 by the AT+GTSRI command.
— The terminal will connect to the backend server by TCP protocol after power on, maintaining
the connection and will never disconnect. If the connection is dropped by the network, the