Specifications

GV300 @Track Air Interface Protocol
z 0: Disable the tow alarm
z 1: Enable the tow alarm
 <Engine Off to Tow>: A time parameter to judge whether the device is considered being
towed after the engine off. If the motion sensor doesn’t detect stillness within the specified
time after engine off, the device is being towed.
 <Fake Tow Delay>: After engine off and stillness detected, if the motion sensor detects
moving again, the device turns into a state called fake tow. If the device keeps in fake tow
after a period of time defined by the parameter <Fake Tow Delay>, it is considered being
towed.
 <Tow Inte rval>: The period to send tow alarm message.
 <Tow Outp ut ID>: The ID of the output port to output the specified wave shape when tow
event is detected.
 <Tow Output Status>: Please refer to the parameter <Output1
– 4 Status> in the chapter 3.2.5.
 <Tow Output Duration>: Please refer to the parameter <Duration> the chapter
3.2.5.
 <Tow Output Toggle Times>: Please refer to the parameter <Toggle Times> the chapter
3.2.5.
 <Rest Duration>: A time parameter to make sure that the device enters stillness status, i.e. the
status of the device will be changed to stillness if the motion sensor detects stillness and
maintains for a period of time defined by the parameter <Rest Duration>.
 <Motion Duration>: A time parameter to make sure that the device enters motion status, i.e.
the status of the device will be changed to motion if the motion sensor detects motion and
maintains for a period of time defined by the parameter <Motion Duration>.
 <Motion Threshold>: The threshold for the motion sensor to measure whether the device is
moving.
The acknowledgment message of AT+GTTOW command:
¾ +ACK:GTTOW,
Example:
+ACK:GTTOW,060100,135790246811220,,000B,20090214093254,11F0$
Parameter Length(byte) Range/Format Default
Protocol Version 6
XX0000 – XXFFFF,
X∈{'A' – 'Z','0' – '9'}
Unique ID 15 IMEI
Device Name <=10 '0' – '9' 'a' – 'z' 'A' – 'Z'
Serial Number 4 0000 – FFFF
Send Time 14 YYYYMMDDHHMMSS
Count Number 4 0000 – FFFF
Tail Character 1 $ $
TRACGV300AN002 – 38 –
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