Specifications

GT300 @Track Air Interface Protocol
- 23 -
start
1
0000 – 2359
0000
end
1
0000 – 2359
0000
send mode
1
0|1|2
0
reserved
0
empty
reserved
0
empty
reserved
0
empty
reserved
0
empty
serial number
4
0000-FFFF
— <mode>: The working mode of this command.
0: Disable this function.
1: If the device is at rest, suspend fixed timing report and geo-fence function.
2: If the device is at rest, only send the +RESP:GTNMR message to the backend
server.
3: If the device is at rest, suspend fixed timing report, geo-fence function and send the
+RESP:GTNMR message to the backend server.
— <rest duration>: If the device keeps still this time long, the device is then considered to be at
rest. The unit is 15 seconds and the default value is 4 i.e. 60 seconds.
— <motion duration>: If the device keeps moving this time long, the device is then considered to
be in motion. The unit is 100 milliseconds and the default value is 1.
— <TRI max>: This defines how many fixed timing reports are allowed to be sent to the backend
server before the fixed timing report is suspended when rest is detected.
— <start>: The start time to begin checking the motion state of the device.
— <end>: The end time to stop checking the motion state of the device.
— <send mode>: This defines how to send the +RESP:GTNMR message to the backend server.
0: Send it following the report mode set by AT+GTSRI.
1: Always send it via GPRS.
2: Always send it via SMS.
The acknowledgment message of AT+GTNMD command:
¾ +ACK:GTNMD,
Example:
+ACK:GTNMD,135790246811220,000B,20090101000002,11F0,0102070202
Parameter
Length(byte)
Range/Format
Default
unique ID
15
IMEI
serial number
4
0000-FFFF
ack time
14
YYYYMMDDHHMMSS
count num
4
0000-FFFF
ver
10
HHHHSSPPPP