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GT300 @Track Air Interface Protocol

3.2. Command And Acknowledgement

3.2.1. Backend Server Register Information

The command AT+GTSRI is used to configure the GPRS parameters and server information of the

terminal. It is also used to configure the report mode and connection mode between the backend

server and the terminal. When the terminal is configured correctly, it should be able to report data to

the backend server.

¾ AT+GTSRI=

Example:

AT+GTSRI=gt300,0,cmnet,,, 116.228.221.61,7001, +7911888888,0000

Parameter

Length(byte)

Range/Format

Default value

password

4~8

„0‟-„9‟,‟a‟-„z‟,‟A‟-„Z‟

gt300

report mode

TCP short connection + SMS

TCP short connection

TCP long connection

UDP

SMS

APN

<=40

APN user name

<=20

„0‟-„9‟,‟a‟-„z‟,‟A‟-„Z‟

APN user password

<=20

„0‟-„9‟,‟a‟-„z‟,‟A‟-„Z‟

main server IP

<=15

main server port

<=5

main SMS gateway

<=20

serial number

0000-FFFF

— <password>: The valid character of password is „0‟-9‟, „a‟-„z‟, „A‟-„Z‟. The default value is

“gt300”.

— <report mode>: Defines the mode that the terminal uses to communicate with the platform, in

hexadecimal format.

0: TCP short connection + SMS. In this mode, the terminal uses the TCP short

connection as the default mode and uses SMS as the backup. If fail to send data via

TCP short connection, send the same data via SMS again.

1: TCP short connection. In this mode, the terminal connects to the backend server via

TCP protocol each time it needs to send data and shuts down the connection after the

data transmission.

2: TCP long connection. In this mode, the terminal connects to the backend server via

TCP protocol once power on, then keeps the connection alive and uses it all the time

unless the connection is broken. Then it will try to connect to the backend server

again and maintain the new connection. To maintain the connection, the terminal

sends heart beat data to the backend server periodically and the backend server

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